Transcript
SMC
matics,Inc.
Air Pilot Operated SeriesN/SA 3lo 5, 4014/4C2/3/44
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DIRECTIONALAIRVALVE AIRPILOTOPERATED
SERIESNVSA
NVSA 3 Why Valves
2-7
NVSA4 Why/sPort(Class1 type) NVSA4 Why/sPort(Class2-4 type)
8-14
15-24
OESIGN This designconceptconsistsot a Match4round 'SFDOL & SLEEVE"assemblywhich controls the main valving func. tions. Thls match-groundfit createsan "Alr Bearing"effect for extendedand€fficientoperaiionand eliminatesthe nsed tor resilienl seals. Large capacily air flows are achieved by applicationot the sMc u.s. Patentsappllcableto this type of valve.Shouldthe valverequiredisassemblylor maintenance the SDoolandSleeveshouldbe retalnedas a unit. GENERAL: Thesevalvesare compact,heavyduty matchedgroundspool and sls€veair valvesintendedlor generalindustrialservice. HOWTHEVALVE WORKS: The spring holds the spool fully up. When pilot pressureis introducedlnto lha "A" pllot chamber,thls pressureacta on the endof the soool.and lorces it down.Whenthis Dressure b€comes high enough, it forces the spool down and comprsssesthe spring. Wien the pilot chamber is exhausted,the pressureagalnsi the spool decays,and lhe springrelumsth6 spoolto lhe up posltlon. PILOTIDENTIFICATION: The officlal standardfor diagrammingalr loglc is Natlonal Fluid Power AssociatlonRecommendedStandardT3.28.91973 "Method of Diagramminglor Moving Part Fluid Controls." The sntire standard is bullt around the ldentificationof the spring end of th€ valveas the "9" end and the end oppositethe spring as the "A" end, The valve bodycarriesthis identificatlonand conformEwith the NFPA standard.
CHARACTERISTICS: PILOTPRESSURE Ths sDool has ng aeals,and is balancedto air pressures. Thus th€ pressurein the valve has no eflect on the pilot pressurerequlred to shift the spool. Tho pilot presaure of the pressurein the requlredi3 alwaysconstant,regardless mainpassages. This featuremakesthe valvean idealcompanionlor air logic systems,assuringconslantresponsefrom cycleto cycle.No othertypeof valveactlonprovidesthis constantresponse. The standardoutput pressur€for movingpart air logic is 50 PSIG(3.44Bar).The 25 PSIGpllot pr$sure requiredto shlft this valvegives approximatelyth€ samo responselo shitl and to returnwhenthe pllot pressureapplledis 50 PSIG (3.44Bar).Theminimumvolumeof iho pilolchamberandthe smallsweptvolumedisptacedby the short.slrokeapoolalso aidin tast response. FLOWPATTERN: MULTI.PURPOSE back' Tfuemulll.purposevalve.Any port may be pressurized, pressured,or pluggedwithout affectlngthe operationof the spool.iray b6 usedwithout modificationas a normallyopen or normallyclosed 3-wayor 2-way,simply by piping and plugging the appropriateports. May also be plped as a selecioror a diverter, MOUNTING: Intendedfor loot mountingor is light enoughto hangin a pipe line. Pipe taps are dirpctly in the body. Valvemay be mountedIn anyPosllion.
DIRECTIOI{ALAIR YALVE AIRPILOTOPERATED
SERIES NVSA3115,3125 NVSA3135,3145 SPECIFICATIONS CHARACTERISTICS
3tr5
NPTF
"{" Y."NPTF CvRatlng
t{vsa n25
0.80
0.69
1.10
0.83
tt95
2.54
%, NPTF
2.58
7.'NPTF
PllotP,€ssurgs' PSIG(Kgf/cm.) '1,To stan spoolshltting
o.171 (4.5)
0.197 (5.0)
12(0.8) 12(0.8)
2.To ehitt spoolfully 3. MaxlmumPermisslble
i
5 (0.3)
ANStSymbol (as a nolmaltyclos€d}way)
4.17 4.50
0.126 13.2)
nL\Tf:Is A
F | E
16,NPTF
SpoolStrol(eIn (mm)
NVAA 3t4t
0.386 (9.8)
5 (0.3)
25|n..nE 11.71 10(0.7) 10(0.4 r00(6.7)125(8.3)125(8.3) 125(8.3)
MULTI.PUSPOSE APPLICATIONS FORUSEAS: PORT"A" POFT"P'' PORT''E" 2.WayNormallyClosed Outlet Supply Plug 2'WayNormallyOpen SWayNormallyClosed
Outlet
Plug
Supply
Outlet
Supply
Exhaust
3-WayNormallyOpen Diverter
Outlet
Exhaust
Supply
Supply
Outlet
Outlet
Two-pressure selector
Outlet
Supplyl
Supply2
Alr (lubricatedor oll-free),any non-flammabls, nongassesexceptoxygen. toxic,non-corrosive Portto port (intemal)not to exceed0.030cubicteet perminuteat 100PSIG(6.7Kgf/cm').
iledla: Leakagq Oporrllng Prossurss: Maledals:
28'Vacuumto 300PS|G(20Kgt/cm,) All housingpadsatuminumdie cas ngs.Spootand sleeve440Fslainlesssleel, heat tr€atedto 5862 RockwellC,and passlvated. SleeveO.ringsBunaN. Spacerand sprlng s6at Dolrln. Bumpsr urethane rubber.
Maxlmum amblenl tomperature: 14o.F.(60. c,) 'Nole;Thsss pilot pressuresapply only to ct€an,well lubricat€dvalves.
HOWTOORDER Thismod€lnumberisa codednumberwhlchdescrlbosaltavallabl€options.
VElvoSlza 1 = Class 1 2 = Class2 3 = Class3 4 = Class4 l|ounling St!,|e
4 = \bh€ unit only (N\6A31 14 only; see page 7) 5 = Footmounting;pipe tap in body hing
0O = 01 = 02 = 03 = (X = 06 =
Maniloldmounting(NVSA3114) 1/8"NPrF0 SA3115,3125) 1/4"NPTF(N\6A 3t 15,3t25) 3/8"NPTFN\ISA3135) 1/2"NPTF(N\^sA3135,3145) 3/,1"NPTF(N!6A 3145)
Opllonal Follur'as N = v{ithR€ce$ednon.locklngop€rator O = withoutManualoperator VSA3135,3145mly H = Internalpllotconnoctlonin Junction box, recsgs€dnon-locklngoperatot S = Intornalpllot connectionin juncflon box,no oD€rator
DIBECTIOI{ALAIBVALYE DIMENSIONS/PARTS LIST
SERIES NVSA3115
NVSA3115
oPttot{a!l frg. lasE axl 338.
A
2.95 (75)
B 2.52 {64)
NOTES
c
D
o.75 {t 9)
2.24 157't
E 0.91 123l
F
't.06 {271
H
1.97 {50)
0.83 {211
J 0.94 124)
K
M
0.16 t4)
1.34 (34)
N
(31)
o
P
0.55 114l
o.12 {3)
PARTSLIST 1
Sp.ing O-Fim
qtu.s a
t f
AXB3& aRp56+! 4
9 &c€ss€d .on-locking op€rslor (hctudes O-dm *a0 Sc/sl/ M4 r 30 $lh lash€f
o
R
s
0.73 0.98 (18.6) 125) lrillimetersin Parentheses 0.47 112't
DIRECTIOI{ALAIR VALVE DIMENSIONS/PARTS LIST
SERIES NVSA3125
NVSA3125
l' o DIMENSIONS A B c D E F G H J K M t{ o P R s 3.54 '1.77 0.94 o.24 0.31 2.24 2.13 0.83 '1.06 0.87 0.39 0.79 0.98 2.13 0.39 0.78 (90) (4s) (241 (6) (8) (sa (54) 121't (27], 00) (20) \251 (54) (9.9) (19.8) MillimetersIn Parenlheses
PARTSLIST h.
o.
1
I{o. B.o'd. 1
qpdngS€at " ' N P T F Spdng-spool€tuln Orlng -Sl€€v€ sl€tw a3lambt-congEt3 ot spootendst.€v€(metch€ds6t)end(4)detjt4
2 I 4 6
€Q!!e, P[ot cot€r asr€mDtywith op€rator.Comtsrsot d€talb 1q 1t, (a)(hratl 1 2 a n d ( O 1 / AP " TFnwhptugs
I
t4
xT!1&4
xTmtl0 ARRt6A{14 XT@4€
7 t0 tl 12 13
vallo Eody- la" NPTF
Roc6l€d noo.locklng op€raror (nctud€€ O{ing S€aD Captlv6 scr€w-Dllot cov€. I
Pllot cowrasromuy wtthouroporator.conlists or dEialB 10,11,(a)d6terl 1a .rtd p) 1A' NPTFftulh ptug3 Plu9-op€r.tor rnountinghot€
axT01&5
PBOl02
xTo12.25A 81'301-t/4
DIRECTIOIIALAIR YALVE DIMENSIONS/PARTS LIST
SERIES NVSA3115,3125 NVSA3135.3145 NVSA3135 NVSA3145
.g!rl!!tt
DIMENSIONS VALVESIZE NVSA3135 NVSA314s
A
4.41 (112)
(146)
B
A1
(e8) 5
(124
2.8 (65) 3.46 (88)
c
2.01 (51)
2.W
c/1)
D /l at
1,38 (35)
F
0.35
1.38
o.47 (12\
2.09
(3s)
G 't.77 (45) 2.8 (65)
H 2.ffi (65)
3.19 (81)
J
2.52 (64) 3.23 (82)
N M 't.97 0.98 (50) (251 1.30 2.@ 2.05 (33) (66) (s2) Millimetersin Par€ntheses
K 1.97 (50)
0.gB (25) 1.O2 (26)
PARTSLIST NVSA 31i|5 I
3
I
4
1
So.inc- spoolrsiurn
I
sl€€vsassarnblv- conslslsol sDootsnd slsev€{malch€rls4, and(4JcLtax5 Spacer Pilorcov6raEs€rnuywith m€nualop€€iorbut nolunclionbox pilol connsction.consi3tsot (btail9, 11,14)debil 10and{$ 1/8"NPTFflu8holuqs
6A
I
EB 9 9A
I I
10 1',|
t2a
r29 l3 14
15 t€
1
Pllot cover aas€rnbly with nanual oF€ralo. and with junclion tlox pilol conr€c. rlon- consistr of dsrairs 94, 11. 124. (41d6klr l0 and (41l/E " NPIF rlush 9rgs3 Pllot covq without {1032 pilot conn€cilon. Hlor coverwlthr10 32 ollol connectlon Caotiw screw - ollot coY€r R€c€€s6d non.lockinq op€.alor l1G32pluc a.d oasket 11O32to1/16'l,D.iub€bdb Pluo - oDerabr mounlino hol€ Plloi cover a$€mbly withoui manual op€.ator and wilhoul iLrnction bot pilol conn€crion.conslsts ot delairs9. 13.{4)dstail 10and (3)1/8" NPTFllu3h pluos
xTo1gr5 xTo195 xTo10.15
axTo2l-14 AXT103-4 xT103.5
ABP566O1E
4FP568.119
AXT36!3
XTM9€
xT01$3/4
xTo12-258 P80402 xT0153/4
211.1 82301.1/4
211-1 82301-1/'l
xTol2.25A PBO102
Erotcovs a$€mblywlthout.nanualopelatorbut wlth junclionbox pilot connscrron- conslslsol detalls9a, 13,128,(4)datall10and(4)1/E"NPIF
xT027-3
xT0293
DIRECTIOI{ALAIR VALVE MANIFOLD ASSEMBLY
SERIES NVSA3114
An optionalmanifoldmounteddesignis a\€ilabletor the NVSA3115valws. The block is aluminumbar stockw h commonsuppty and exhaustas wsll as an individualouttetport on the side.
HOWTOORDER NlrsA3114-00 N -TI
I
R€fertopage3 HOWTOORDEF
ORDERING H(AMPLE: I PCE-FOURSTATIONMANIFOLO ASSEMBLY COIYIPRISING: STATTON 1: NVSA3114-OO0 STATTON 2: NVSA3114-OOO STATION 3: NVSA3114_O0O MA 300_03
DIMENSIONS A B BBD E G H K M N 3.58 4.61 2.56 3.58 1.22 1.50 0.26 3.29 3.23 1 , 4 2 2.05 't.10 0.59 (91) ( 1 1 4 (65) €r) (31) (38) (5.5) (83.5) (82) (36) (52) (28) 05) 'Dlmension if DCSotenold is Used Mlllimeters In Parentheses
MANIFOLD DIMENSIONS 2 I-----------! 3 4
6 f I I t0 4.92 6.42 7.91 9.41 10.9112.4013.9015.39 (87) (125)(163) (201) (239) (277) (315) (35iD (391) 3.94 5.43 6.gl Lili) 9.92 't1.42 12.9114.41 15.91 (1m) (138) (176) (214t(2521 (290) (328) (366) (404) Mllllmeters in Parentheses
MA300-xx Assy.Klt (whentactoryassembted) XX = No.of Stailons
DIRECTIONAL AIB VALVE
SERIES NVSA4@14
AIRPILOTOPERATED
ANSI Symbol
NVSA4214
NVSA4114
NVSA 4314
NVSA 4514 g Y ) \
E _ l \- \\ tl /i // ,
1""NPTCv0.8 v.. NPTCv 1.0 16'NPTC! 1.0
8 PSIG(0.55Bar) 18.20PSIG(1.24Bad 150PSIG(10.3Bar) [calla:
Air {lubricaledor oil.free),any non.llammable, non-toxic,noncorroslvegasesexceploxygen,
L..k.g.:
Port to porl (internal)not 1o exceed0.m7 cubic feet per minule at 100PSIG(6.9Kgtcm').
Op.r.Sng Pr..rur..!
28'Vacuuh to 30oFSIG(20Kglrcm?).
x.t.rt.t.:
[|rlmufi lrnDlanl lcmp.r.lur.:
-4
DESIGNJ This design concept consists ol a Malch-Ground "SPOOL & SLEEVE" assembly which controls the main valvinq functions. This matchground fil creates an "Air Bearing' elfect lor extend€d and elficient operaiion and eliminates lhe need for resilient seals. Large capacity air flows are achieved by application ol the SMC U.S. Patents applicable to this type of valve. Should the valve require disassembly for maintenance lhe Spool and Sleeve should b€ retain€das a unit. GEI/EFAL Heavy duty air valves built to comply with Jlc and all induslrial standards. Designed specifically fo. use in co-operation with air logic. R€cessed non'locking manual operato( availablo on all models, lype ''N" and "O" valves operaie through "external" palot pressure supply port on top of valve. Type "A" and "8" valv€s may be operated through ''internal' pilot pressure sopply porl situated in either their sub-plale (SPA)or slacking manitold blocks (IVBA). PILOT IDENTIFICATION: The otficial standard lor diagramming air logic is National Fluid Power Association Recommended Stanclard T3.28.9-1973"Method oI Diagramming for Moving Part Fluid Controls." The €ntire slandard is built around the idenlification of the pilots as "A" and "8". Tho valve body carries this identification ahd contorms wilh th€ NFPA standard.
All housingpartsaluminumdie castings-Spooland sleeve440F stainlesssteel,heattreatedto 58-62 RockwellC and passivated. SleeveO-ringsBunaN. SpacersDelrin,Bumperurethanerubbet
PIIOT PRESSURECHARACTERISTICS Tho spool has no seals, afld is balanced to air pressures, Thus the pressur€ in the valve has no eflecl on the pilot pressure required lo shift $e spool, Th€ pilot gressure reguired is always constanl, rega.dless of the pressure in lhe main passages.
140'F.(60'C.)
This f€ature makes the valves the idoal companion tor air logic sys' t6rhs, assuing a constant response irom cycle to cycle, No other lype ol valve action provides this conqtant response,
'Note:Thesepilol pressures applyonlyto a clean,w€lllubricatedvalve.
MULTI.PURPOSEFLOW PATTERN True mulii.purpose valve. any porl may be pressurized,back'pressured. or plugged without aftecting spool action. ANSI symbol shows the valve as a single inlel 4.way, bul valve may be used, withoul modilica. tion, as a dual inlet 4.way, a 3.way, or a 2-way, by piping and/or plugging lhe appropriate ports. MOUNTING fntended for si,lb'plate or manitold rnounting. May be mounted in any oosition,
Ihe slandard outplJl pr€ssure lor n\ovilg patl air logic is 50 PSIG. (3.44 Bar). The low pilot pressure required by these valves gives ex' tremely fast response to energize, Minimum volume o{ the pjlol chamb€r, and small swepl volume displaced by the shorl-slroke s0001also aid last resoonge. PILOT PRESSUREPORTS Type A & B SMC Class 1 valves are designed lo accept Pilot Pressures "lnternally-' lnt€rconnecting pilot passaqes located in the base of the valve automatically channel pilot air to lhe appropriate operating chambels of the valve when the valve is mounted onto either a pilot ported subplate or lhe MBA manifold blocks. This elimi' nales the need ol disconnecting Dilot lines when valve is replaced in the lield.
DIRECTIONAL AIR VALVE AIR PILOTOPERATED
SERIES NVSA4@14
HOWTOORDER
This model number is a coded number which descibes all availableoptions.
I
NVSA 4 lype of Actu.tlon 1. Singl€Pilot,Springreturn 2- DoublePilot,detented 3. DoublePilot,springcentered (allportsblockedin neutrat) 4. DoublePllot.springcentered (cyl.portsopento exhaustin neutrat) 5. DoublePjlot,sprlngoffset
A = R€cessednonlocking operaior,.pitol pres, sure, access throirgh base oi valve. I = No operator Pilot pressure access l h r o u g hb a s eo f v a t v e . N = Recessednon,lockingoperalor.r'Externat' p r l o lc o n n e c t i o n . O = No operalor Ext€rnat pitot connection.
Portlng 00 =
o
4
Indicates valve unit only - no base (lncludes sub-plate gaskel & hotd down bons)
Use For Valve Type N&O A&B 4 1 ' 5 1 = M o u n t e d o n i n d i v i d u a ls u b plate-'/a" NPT side ports (5) - dual e)(haust 't1 '12 = 42 r52 - Mounted on individual sub. Mouoled on siacking manilotd plal6 - 1/,' NPT side ports b l o c k r , , N P T s i d e p o r t s( 2 ) '14 = Mounled {5) - Oual exhausl on stacking manifold 43 '53 = Mounted on individuat subblock 7." NPT side & bottom ptale %' NPT side & pons (4) ' 1 5 '16 = boltom po(s (10) - dual Mounted on stacking moLlnted exhausl b l o c k 7 . " N P T s i d e ( 2 )& 44 '54 = Mounted on individual subbottom (5) ports ptat6 - lz" NPT bottom pons ' T h e s e (5) dual exhausl m a n i f o l d s& s u b . p t a l e si n c o r p o r a l e ' , t " 45 '55 = lrounted on individuat sub- N P T ' p r l o l p r e s s u r e p o r t s l o r s u p p t y r n g ptate - ;{" NFI side ports "intemal" pilot pressure to the valves. 'Type A (O - dual exhaust and B vatves onty
To Specily "Factory Buill" Valve/lranilotd Assembty: 1. 2. 3. 4.
Establish the number ol staiions required. S€leci the type of valve required on each sralon. C h o o s eM a n i t o l dB l o c kd e s i r e d .e . g .# 1 2 ,# 1 4o r # 1 6 . To specily a valve mounted on a manilotd btock I n s € dm a n i t o l dn u m b e ri n t o v a l v en u m b e r i.e. NVSA 41 14-'l 1N b a NVSA 41 14-0ON vatle mount , on a #11 block.
To Order "Faclory Built" Valve/t anifotd Ass€mbty: EXAITPLE1 Pce. Four Station Manifotd Ass y comprising:s t a t i o n 1 . N V S A4 1 1 + 1 2 A N V S A4 1 1 4 - 1 4 4 S l a t i o n2 . N\^SA42r4-12A station 3 (3) Blocking Djscs in p, EA & EB galterjes. S t a t i o n4 . # 1 6 M a n i f o t dB t o c k & B l a n kS l a t i o nK i t 1 . M E 4 0 1 1 R , 4A s s e m b t yK i t
SUBPLATES ANDMANIFOLDS
(fo ordervalvesmountedon subptatesor manitotds,insert,,XX"into VatveNo.) Exafiple:NVSA4114.,.XX"A '/." Side, L' Bottom A &B
SUBFLA PARTNO. s P0 1 1 1 s P0 1 1 2 s P0 1 1 3 s P0 1 1 4 s P0 1 1 5
TES
o
PARTIIO. sPA0111 sPA0112 sPA0113 sPA0114 S P A0 1 ] 5
&o PORTING :{" NPTF Side
{No. of porb)
"xx"
t5l (5)
%" NPTF Side (5),'/t" NPTF Bottorn Y." NPTF Botlom
42
(5)
4:l
% " N P T FS i d e
(5)
7." NPTF Side
(5)
Valv€ %" NPTF Pilol PORTII{G (No.ot po.ts) 'r' NPTFSide (S)
"xx" 5i
L'NPTF Side j{' NPTF Side (5),'n. NPTF Botrom
(5) (5}
li" NPTF Bottom
52 53
(5)
54
{' NPTF Side
{b)
55
Lefl & Righl End Plates hcludes (3)O.RingsARP 565015 (1) Ptuo AXT a369 Lett & Fight End Plates - Short w/o Conduit NpT Threads.Includes (3)O-Rings AFP 568-01S Trerods . Includes 12)lVl6X25Screws per Rocl
CrnduitCover,Inctudes (4)8.32x !6'screws. NolerNolrequired if usingME4OlSLR Endplales.
DIFECTIONAL AIR VALVE DIMENSIONS PARTSLIST
SERIES NVSA4E14 NVSA4114 DETAIL REF.
DESCRIP'ION Body SDrino. Reluh
3
Spring S6at
4
EndCaDw/(4)Screws
5
End Cag
I
't0
'11A 118 11C 11D
13 14
15 1€ 17
DETAIL REF.
3 5
6
Alum.D.C. Alum.D.C.
DESCNIPTION
MATERIAI.
Body DetenlAss'v. Spacer- "A' End SpoojE SleeveAss'y. O'Fino-S& S {6) Gask€l PilotCovers(2)
AlLrm.D.C.
PILOT COVEFS
7B
70 8
s
6B
D 1.99 (50.s)
'|.52 1.44 (38.5) (37.5)
lt 1 . 1 0 1.06 (2Bl l27l
J
K
0,63 1 . 4 2 0,91 0.61 1 . 2 6 ( 1 6 ) (36) (23) irs.5) (32)
Type "O" ' wlo Operetor w/{4)Scrows{a Type"N". Woperator& (4)Screws (a Type"B" - vo Operator w(4) Scfews(ea.) TyDe"A" - Woperator& (4)Screw6(€a.)
E C0 1 1 1 - 1
Rec€ssedNon-Lockihg OPeralor
1l
Scr€ws'PilotCovers(4)
13 l4
Hold Down Bolt (8.32x 1 Y'!') Gasket - Subplate Cushion . "8" End
PAFTNO. AxT 33$20 AXT33310
440F-S.S. BunaN AFtP56&014 AXT 334.7N-1 BunaN "A,,END.B"Eftl0 Alum.D.C. PC 0100-1 Alum-D.C.
PC 0101-1
Alum.D.C.PC 01101 Alum.O.C.PCOI11nPC 01Zl-1
Cushion-Pllol Cover"4" End . Operator O.FlinE BunaN
10
tl
Millltute.s in Parenlheo€s
r0
AXT333€-3 AXT333€
Llst
NVSA 4214
1.95 (4e.5)
PARTI{O.
Scr6ws- EndCap(4) 440F. S.S. Spool& SleeveAss'y. ARP5€8-014 GRinos'S & S (6) BtrnaN AXT 334.5N Cushion-Pllot Cover''4" end AXT 334-7Nn BunaN Ga6k€t.Pilot Cover& EndCap{2) PILOTCOVERS "A"E DI'B" ENO Alum- D.C. PC0roGl Typ€"O'' do Operator, w(4)screws (a PC0101.1 Alum.O.C. Typ€"N" w/Operator & (4)Screws \2:) Alum.D.C.PC0110,1tTyp€"8" Wo OpeEtor w/{4)Screws Alum.D.C.P C 0 1 1 1 . r-l Type"A" W/opelator& (4)Scr€ws BunaN O.Flnq ' Op6ralol PB0103 Non.Locking Recess€d Operator Screws. PlloiCov€r{4) gunaN AXT33512-2 Gasket - Subplate NXT3s317.5 HoldDownEolt (8.32x 1 Y'r')12) AXT33310 Buho€r - "A" End
7
5.12 {130)
}IATERIAL Alum.O-C.
AXT 334-5N PB0103
NXT333-17-5 Buna N
AxT 33$ 12.2 AXT334.5
DIRECTIONAL AIR VALVE DIMENSIONS PARTSLIST
SERIES NVSA4&14
O
nrr.*.t.*,.
DETAIL REF, 2 3
TMTERIAL Alum.D.C.
OESCBIPTION Body SDrinoSeat
t2)
Spring. C€ntering
l2l
Cushion-Pilot Cover "8" Enc Spool & Sle€ve 440F S.S.
\
10
O.Rino.S &S {6) Soacer. B End Gasket. PilotCover& Spacers(4) Soacer."A" End Bushing.Body t2\
11
C u s h i o n - P i l oCt o v e a A ' E n d
6 7
Q *-r
I
iN
9
'124
I
N
124
-
r2c 12D 13
'14
o
6.10 (155)
B
o
E
G
2.4e (63)
2.O5
?.o1 (51)
1.06
(62)
<52)
l2B
127)
H
K
il
N
0.63 1 . 4 2 0,91 0.al 1 . 2 4 ( 1 6 1 {36) 123) (15.5) (32)
'1" enol"a"ero PILOTCOVER Type"O" w/o Operators Alum.D.C. PC 0102-1 d(4) Screws(ea.) 12) Typ€"N". w/operator& PC01031 Alum.D.C. (4)Screws(ea.) (2) Type"B" - w/o Operalor. A l u m .D . C . PiJ0112. w/(4)Screws(ea.) Type"4" . w/Operalor & Alum.D.c. rc fi131lPC01231 (ea.) {4)Screvr's O-Fling- Opelalors
Buna N
17
HoldDown8olls {8.32 x 1 9'61(2)
AXT33112-2 AXT334.1G1 NXT333,17.5
MATERIAL Alum.O.C.
PAB' NO.
0EscRrPTtol{
1
Body
2 3
Spring- R€turn Spring. Seat PILOICOVEF"8" END Typ€"N & O" w/(4)scr€ws Type"A & B" w/{41 Screws
AXT3339-3 AXT333€ PC 010S1 P C0 1 1 1 - 1
Spool& SleeveAss'y. ORim.S&S(6) oushion- Pilol Covers "A & B" (21 Gasket. Pilot Covers(2) PILOTCOVERS',f'ENO
440F.S.S.
10A
TYpe "O
108
Typ€ N" Type"8"
6
10D
E 1.48 {37.5)
BunaN
Gasket- Subplate Screws- Pilot Cover(4)
10c
1.52 (38.s)
AXT 334-16-1 axT 334-22-6 axT 3s4-12.1
15 18
7
1,99 i50.s)
BunaN
Screw Pllot Cover (41
D
1.95 (49.5)
ARP 568,014
AXT334-16-2 AXT 334.7N-1
PB 0103
4B
4.50 [1',l9)
6unaN
Alum.D.C.
DETAIL REF.
B
AXT334.10 AXT334-14 AXT334-12-2
8eces9€d Non.Locking ODeralors
Mi(tne€€ ln Parenlhess
NVSA45l4
PAFTNO.
ll
1.10 106 (2S) \n)
K
0.63 1 . 4 2 0.91 0 . 6 1 i 1 6 ) t36) t23) 05.5)
N 1.26 (32J
Mi[imebrs in Paronlhes6
11
O-Ring, Operatol
12
RecessedNon-Locking Operator
13 '14
Gasket . Subplate
r5
HoldDownBolts €32 x 1 n.') Soacer"A" End
BunaN
ARP568014 AXT334.5N
BunaN
AXT 334.7N-1
Alum.D-C. Alum.D.O. Alum.D.6. Alum.D.C. BunaN
PC 0100-1 PC 0101.1 PC0110.1 PC 0111-1
PB0103 BLrnaN
AXT335-12.2 NXT333-17.5 AXT333.10
1t
DIRECTIONAL AIR VALVE SUBPLATES
SERIES NVSA4@14 Gen€ral: Sub'plalesarc heavy duty aluminumdie castings.All ports are markedwilh identllicationin accordancewith Anerican National StandardsInstilutestandardANSI893.9-1969 "Symbolsfor Marking EleckicalLeadsand Portson FluidPowerValves."
u'T-
f:'-f b'd-T-',"S -
0"ll_
Pllot PrgssuraPods: Slyle "SP" sub-platesdo not providelor pilot pressureconnections lhioughlhe sub plate. Slyle "SPA' sub-platesincorporale{a 'n" NPT "Pilol Pressur€" porlstor supplying"internal' pilol pr€ssure to TypeA & B Air Piloled ValvesOnly.
.28 (7
NOTE- Type"T" solenoidvalvesprovid€for elect.lcalwiresto exit lrom the top surtaceof valve.
'n(" xo.
SUB.PLATE I$ODELNO.
l p
.sP" 'sPf
sP & sPA011r
41
sP&sPA0112
12 43
SP& SPA0113 S P & S P A0 1 1 4
sP & sPA0115
51 52
PORI LOCATIO P
A
qB
siB B
* y.
54 45
2 PLACES FORHOLELOCATION REFERIO F@TPRINT
B
a
EA
2,13 (s4)
E8
s/B s/g 9a B S
B
s
2 MTNGHOLES
I
.FOOTPRINT' CLASS1 SUB.PLATE MOUNTED'SWAYVATVES
(?e i.'8 -l-| '49
|
.59
1.19 (63i
L,,l |
12
(18)
IN PARENTHESES NUMBERS AREMILLIMETERS SHADEDAREAIS IN CONTACT wlTH i'OUNTINGSURFACE
o
DIRECTIONAL AIR VALVE MANIFOLD ASSEMBLY
SERIES NVSA4@14
Applicalion Normally this manilold arrangement is used for Single pressure, Four Way valve circuitry. where pressure is apptied to the (p) comm o n g a l l e r ya n d e x h a u s l st h r o u g ht h 6 d u a t ( E A & E B ) c o m m o n g a €ies. However many olher circuil capabilities are easily obtained by the intermixing of different types of SMC Mutti-purpose Air piloted and Solenoid valves in combination with th€ir basic manifotd units. The use of Gallory Blocking Disc within the assembly further expands syslem capabilities. Side cylinder ports ,.A', & ,,8" are locatect o n t h e " B " P i l o t s i d e o f t h e m a n i t o t da n d . S t a l i o n , t d e n t i f i c a l i o n i s o b l a i n e db y n u m b e r i n gt r o m l e l t t o r i g h t a s v i e w e d t r o m t h e , 8 , . Solenordside.
o V ,_'
fi
.9
f--'.--ry] f+r-q+ r i | r
|
|
t-?----!+-<-{ l r l tF)-)-+++--(lr{
I
I{ANIFOLD BLOCK NO. PARTNO. MSA1010.02 MBA10'tr.02 1 1 MAA4210.02 t6
STATX)flS -1 L.
2
nm)
PRESSURE
CYLII{OEF "A&8" SIDE aoTTor
Yes Yes
'/f t2)
Y€5
v."11) v.' t2\
t'lZ
Y€E
t'la
t " t2:l
3 a 5 6 7 5.U, a'|A, 10,,{, 1 1 % r (14r) (179) a1A (255) @3) 9 % r 10
!OYTOT
Yes
't"et
(12() (154) tl60r QUI
EXHAUST "EA & E8"
t
t0 16t, (3691 t4071 1 2t , 13 1 5 t , 16rxr 1310) B{a) "1, €86) t4211 I 1 Ah . (31)
14'1Az
a2"ti Lr=38N+zz Lz=38N++l
13
DIRECTIONAL AIR VALVE INTERFACE SPEEDCONTBOL PILOTINDICATORS
SERIES NVSA4(914 INIERFACE SPEED CONTBOL
FEATURES 1- Eliminates expense ol Plping and "External" Flow Conlrols. 2. Simpllfies installation by eliminating piplng. 3. Provides tor "Meter.Ouf' flolr adjustm€nts hom Zero to 90o/ool valves' Full Flow capacily in 12 turns ol n6edl6. 4. Allows {or transler ot "Pilot Pr€ssures" to lhe valve when used with Typ€ "A" & "8" (lnlernalpilot) airope€t€d NVSA valves. 5. Imploves syslem appearance.
GENERAL This Spe€dControlis an Aiuminumdi€ casl InterlacePlatehaving on its upper surlace a mountingpaltern which acceptsall SMC Class1 solenoidand air operatedvalvesand wilh a lower surface which mountsonlo all subplatesand manifoldsapplicabteto these Class1 valve6. INSTALLATION The SpeedConkol is mountedbetweenthe subplate/manitold and the valveby utllizing/r'longer boltsin placeol the standafd valve Hold Oournbolls. May be field inslalledwilhout systemor plping modificalions. TOORDERFONFIELDREPLACEMENT Kit Numtbr Comprising of SPA OlOO 1 - #AXT392SpeedControlBtock. 1 - *AXT335-12'2 Gasket. 2 - #NXT333-17HotdDownBotrs(#8.32x 1 7t
OPERAIION Cylinder spe€ds may be independently controlled by adjustnent ol th6 needle valve6 in the "EA" & "EB" porls ol the speed contlol block, theSe needle valves control llows of exl€lst air trom lhe valve and ar€ "Vibrationproof" and ot "Non'Ri8ing" design.
2,6r -ri
| I
It'rl F lotl
l:l 'l
r'll
PARTNO. SUFFIX NO. oEscRtPTtotl vR 3110-01R R e d ' P o D U o " l n d i c a t o rX " N F T F VR 311G0]G
v2
Gre€n "Poo Uo" Indicator l,i" NPTF
ffi
+f t't+f L3p
lrvt
l
lE9=31 r
itxt a3l-17
(^S-s"tzo1
TT II
[ux]
tl
'dJmfo ll E
H
g A 0.39 (10)
HOW TO OROER
B 0.16 (4)
o 0.67 07)
0.12 (3)
ffi-ii' Exanple: NVSA 4| 14.52AV2
14
il
I I :lar
rO OFDEAAS PAFTOF VAIVE'}IANIFOLD ASS'Y ADDSutlix"M" to part numb€r. =A |NVSA 4114.00A Example: PartNumber*NVSA4114-52AM vatve mounled on *ISPA 0112 subplate with a #SPA 0100 InterlaceSpaedControl between. PILOTINDICATORS Thes€brasaplugswhenplacedinto the N" pilot Portsof an "A or B" style NVSAallow you to know it and yrhenpressureis in the Pilot cavity,You havean option ol either a r6d or greenrlsing pin onyourindicalof,
Ir.'.,I
t'"'t
I
Specificationssubiectto changewithoutnotice.
0.14 (3.5)
0.39 00)
SERIES NVSA NVSA
DIRECTIOIIAL AIR VALVE AIR PILOTOPERATED
41.B4
SPECIHCANONS cfiAnaqTEitsnca q, <ng on Subpletslr 1/il' 38. 1E' spoor5lrof6: In.(mm) PSIG(Kgt/cm,) 1.To$.n spool!nlfti69: Z ToBnn spoollully: 3. To relom spool wllh pre33!r6on "A" pllot:
A4C
NV
4
tca 1r/l 1.17 1 . 4 7 1.47 1 . 4 7 l.6r t.61 1.61 1,0i
)34
44 ,|5!r
44
0.1n o.1n 0.30a0.391 {4.5) (4.5) 00) (10) 4.0
3.5 o.24) 1G12 tGl2 to12tGl2 (0.€9)o.6s)10.09) (0.6q)
4. Ma{mum P€r|r'Esabt6 M6)dmum Ambl6ntT6mo€ratur€t I Msdra:Alr 0ubrlc€tedor oll lr3€),any non.flammsbtG, non.lorlc,non{ollo3ivaoas€E oxc€oloxvo6r,.
'1.47
1.61
o.177 (.1.5) 4,0 o.28) 10-12 {0.60
2.39 2.39 2.39 2.N 2.72 2.72 272 272
2.39
o197o t 9 7 043.{ ) 434 (5) (5) ( 1 1 ) fir)
0.197 G)
ao
x5
3.5 t0.2al 1(l'12 t G 1 2 1G12 1 G 1 2 (0.69 0.6s)(0.6€)
mhu510 {0.09
3.78 3.7!
(0.89) 125PS|G I .3Kgl/cmr) 140. F (60. C)
3.7E
Nt/sA 4t 04
0.360 0.3& u61610.646 0.388 (9.8) p.E) 116.4)106..) pa)
e0 8_0 o.a1) (0.53)
1 6t 2 t0.681
3.78 3_78
0.5 {0.45J{0.45} 1915 &10 1S15 1&15 (0.8s)
&0 o.55) 13.15 0.89)
VSA4204
{0.69)
NVSA4304
L€akag€: Pori to Port (lnt6.nat) no o 6xo€€d 0.035 cublc l€€tp€r mhut€ at tm PstG t6.9kgflcm')
Op€.atlng Pro$ur$: 28' Va4uumro 300PSG @ rgtcm:)
M6l€aa|srAll houBlng psts atumtnum dt.castms, Spool.nd al€€v€44OFltalntds st*t. h6at trort€d to 58€2 Rockw€ C aM pr$lvat6d. Sl€€v€O.Fhg3 Buna N. S9.c€rs D€kin. Bumo€r ur6thde rubb€r 'l{oto: Th63€ pllot pr6€aure! apply onty to a ct6rn, sa
N\rsA44C)4
ilt\ t//, tub crt6d vatve,
DESIGN Thls dsslgn conospt constsls of a Match.cround.:SPOOL& SLEEVE,, assemblywhich controlsthe mainvalvingfunctions.Thls match.groundfit cr€alesan ''Alr Bearing"effoct for extendecland offlcient ogerationand eliminatosthe n6edfor r€stttenls6ats.larg€capacityalrfloyrsar6 achieved by applicalionof the SMC u.S. patentsapp cable to tht6 type of valve. Shouldlh6 valver€qut.edlsasEembly formaintenanceth€SpoolenctSteeve shouldb€.€talnedas a untt. GETiERAL: Heavyduly alr valvesbuttt to comptywllh JtC and a induslrtatstandards. D$igned sp€cificattylor use in co{peration with alr togic.Op onal pitot conn€ctionIn junctlonbox and laroelappedjunctionbox coverallow looic controltubes to bs run Into the,unction box throughelectricatconduiir alJ hose us€das conduit,lhus avoidlngexpos€dcontrol tubes.Junclion boxi9 splash-proof ando -tight. PILOTIDENTIFICATION: The officiat standardtor dlagrammlngair lo€tc is NationalFlutd power '.Methodof Oiaoram_ AssoclationBecommendedStandardT3,28.9-1973 mlnOfor MovtngPartFtuidControts.Theentirestandardis built arou; lhe ldontlticatlonof the sprlngend of the valvsas th6 '.8" end,and the oitotend ol the vatveas the -A" end.The vatv€body carrieslhts tdentificaiionand conlorm9with th6 NFPAstandard. PILOTPRESSURE CHARACTERISTICS: Th€spoolhas no s€als,and is balancedto air prsssures.Thuslhe pressure in lh€ valvehas no 6lt€cl on the pilot pr€ssure.€qukedto shift the sooot. Th€pilot prossurer6quiredts atwaysconstant,regardt6ssof the pre;sure In lhe malnpassages. This leaturomakesthe valvosthe ideat compantonfo, atr togic sy6tems, aagunngaconstantresponsefromcycl€to cycle.No oth6rtypeol valveactlon pbvldesthis constantrelpons€. Th€ standardoutpt t pr€ssua€ tor moving part air togic i3 50 pslc. (3.4
N\6A 4504
SII{GLEPILOTSPFINGRETURTI Air operatesthe spoot direc y, and a spring returnslhe spoot when atr is exhausted. DOUBLEPILOTDETENTED Air operales the spool direcfly. A mechanicaldetent hotalsthe soool securelyin either spoot posi on, as r€quiredby major automo ve s;letv standards.Thusa momBntarysignatwitt shift the spoot,anctthe dotentwiil hold tho spool in the shiftedpositionuntit th€otherp ot is pressurizect to shlttthesooolback. DOUSLEPILOT3 POSITION SPRINGCET{TEREO Air op€ret€s the spool direcfly,wh e two centeringspringshold lhe spool in th€centerposition.Notethat each spriogc€ntersthe spool by meansof a spring seat which seats ftrmly againstthe end of the steeve.Thus the spootatwayscenlercaccurately,Th€centeringspringsdo not buck each otherasin somespringcenteredvalves. OOUELEPILOTSPRING OFFSET Thedoublepilot sprlngoftset ac on is an unusualaction not avallablewith most othd valv6constructions.Whenpitot pr€ssur€is Introducedinto lhe "A" pilot,thls prossureact6on the'.A" end ol the spoot,and whenlhe pressurebecom€shigh enough,it forceslhe spooltowardthe..B,,end,and compressesthe spring. lf, whil6 the ..A" pilot is pressu zed, an equal pressureis introduced into the..g,'end (thesprlngcavity)this pr€ssur€ acts againstthe ''8" end of th6 spool,and balanceslhe pressureagainst the "4" end.Now the springr€turnsthe spootto th6 normatposition;even thoughtho "A"end sti haspitot pressurein il. MUI.TI.PURPOSE FLOWPATTERN: True mulli.purposevalve.Any port may be pressurized, back,pressured. or pluggedwithoutaffectingspootaction.ANStsymbotshowsthe vatve a6 a slngleinl6t as a singleint€l4-way,but vatvemaybe us6d,wilhout modtfication, as a dual Inlel 4-way,a O-way, or a 2.way,by ptpingand/orptuggingthe approprialeports. MOUNTING: Intendedfor sub.ptateor manitotdmounting.Maybe mountedIn anv Dosi. lion. Int€rchang6abte wilh certaincompetitiv€vatveson their sub-olaGs.
fr'l"JiT:",,K'::l';"".J,1"1^"?ffiI:"":l:"."i1':ffll ai::l1*IHlT, -volum€
dt6placedby th€short.stroke spootalsoeidfast resDonse.
DIRECTIONALAIR VALVE AIR PILOTOPERATED
SERIES NVSA4€24,4€F34 NVSA4C44
HOWTO ORDER 4
tAilMt -fT t
t Type ol Actuallon 'I = SinglePilotSpringReturn 2 = DoublePllot Detented 3 = DoublePllot SpringCentered(All ports blockedin neutral) 4 = DoublaPilol SpriDgCantered(Cytinder portsopento dual supplyIn neutral) 5 = DoublePllot SprlngOffset
valve Slze 1 = Class1 2 = Class2 3 = Class3 4 = Class4
N\6A 4 0 34
I I I
Oplions ur - InterlaceSpeedcontrol Vl - RedPilotlndicator V2 = creen PilotIndicator
I
II L- Fsatures A = Recess€d non.lockingoperator,pilot pressure accessthroughbassof valvs. B = No operator-Pilot pressureaccessthrough baseof valve. C = Tappedjunction box cover,pilot connections in Junctionbox, but no operator. J = Tappedjunction box cover,pilot connectlons in iunctlonbox, recessednonlockingoperator. N = Blankjunctlon box cover,rscessednon-locking operalor. O = Blankjunction box cover,no operator.
Mountedon IndividualSubplate- 3/8'NPTF Sid€Ports(5) Mountedon IndivldualSubplate- 1/2" NPTFSide Ports(5) Mountadon IndividualSubplate' 1/2' NPTFSide Ports(5);10-32Pilot Ports(4) Mountedon IndlvidualSubplate- 3/8" NPTFSide Ports(5);BottomPorts(5) Mourted on StackingManifoldBlock.3/8" NPTFSide Ports(4) Mountedon StackingManlfoldBlock- 3/8" NPTFSlde Ports(4);BottomPorts(2) Mountedon StackingManifoldBlock.3i8'NPTF Side Pqrts(6);Botiom Ports(5) Mountedon StacklngManitoldBlock' 1/2" NPTFSide Ports(4)
\rsalo44 0t = Mosntedon IndividualSubplate- tiz" NPTFSide Ports(5) 02 = Mountedon IndividualSubplat€. 3/4' NPTFSide Ports(5) 03 = lvountedon IndividualSubplate- 1/2' NPTFSide Ports(5);Bottom Ports(5) 04 = Mountedon lndlvidualsubDlate- 3/4" NPTFside Ports(5);Bottom Fbrts(5) 05 = Mountedon IndividualSubplate- 1" NPTFSide Ports(5) 06 = Mountedon IndividualSubolate- 3/4" NPTFSide Pons (5)
t
t l tI I l
Porting 0O= Indicatesvalveunit only. No base (lncludessubplategasketand hold dolvnbolts,) ,{vsA40 24 0l = Mountedon IndlvidualSubDlate- 1/4"NPTFSide Ports(5) 51 = Mountedon lndlvldualSubplate- 1/4" NPIF Slde Pons (5);10-32Pllot Ports(4) 02 = Mountedon IndivldualSubplate- 3/8" NPTFSide Pons (5) '10-32 Pilot Ports(4) 52 = Mountedon IndividualSubplate- 38' NPTFSide Ports(5); (5) 03 = Mountedon IndlvidualSubplate.1/4" NFIF Boltom Ports 06 = Mountedon IndivldualSubplate- 1/4" NPTFSldeSupply(1I BottomPorts{5) 21 = Mountedon StacklngManiloldBlock- 3/8' NPTFSide Poris (4) 23 = Mountedon StackingManltoldBlock.3l8" NPTFSide Ports(4);Bottom Ports(2) 28 = Mountedon StackingManifoldBlock- 3/8" Side Ports(6);BottomPorts(5) 41 = Mountedon StackingManifoldBlock- t/2" NPTFSide Ports(4) 01 = 02 = 52 = 03 = 3t = a3 = 38 = 51 =
l
DIREGTIOI{ALAIR YALVE DIMENSIONS/PABTS LIST
24,4€)34 NVSA4124 4134. 4144
%
PARG L|sI
-'-^"."
I
E-
I
t-Elf
+.--' \
+--
-+o-H ' r i
-;
-a1--
- : - l-nAiv
8 I 10 l1
EJ E)
=:-:H-
DITENSIONS
i/b.a $n
a ltfllon!.
NXT02(!144 NXT0t&Sl P20 AXT22S4A NXT0t0.t7-,
oly.
DarcrlpDon
I
Rlghi & Lelt End Biocks. lncl. (2) Flef. 4, (2) R6l. 5 and (3) Fef. 9. Too or Boltom ''V" Clamo Plalas, Eolt and nut for "\f'Clamo PheE. 4024 to 4094mounting. Adaptor Plate. Bolls. AdaDtor Plqto. 1/4.mx5/8, Gasket. Adeptor Flat6. O Rlng, Manlfold Block gall€ries. BlockangDisc. Gallery. Pin, Mentfotd Block atignment. ll€cEslary lor al6gmblies ovgr lour i4) valves-
2
1 I
:
@nl6l t dory.
u A B c D E F o H J t( T N o P B s r 3.43 2.&i '|.89 2.U 3.54 1.73 1.81 3.54 1.97 0.35 5.12 'r.33 1.38 0.67 0.71 1.34 1 . 1 8 (87) 17a (,|8) (6n (90) (44) (16) (90) (50) (20) (9) (13{t) (110) (35) n 4 (1e) (34) (30) Mlllim€tersln Parsnth€ses
DIRECTIONALAIR YALVE BASICCONSTRUCTION
NVSA4924,4e34 NVSA434 ANDAIR PILOTSCAN BE INTERCHANGED SOLENOID
Dueto th€ modulardesignot the SeriesNVS/NVSA4024lhrough 4044valves,interchangingsolenoidsand air pilot operalorson eithe. the "A" or "B" ends of the valvesis possible. This allowselectricaloperationof the valvein one directionandair pilot for the return.Contaclthe factoryfor furtherinformation. BASICCONSTRUCTION SMCair pilotoperaiedvalvesusethe $amebasicbody,spooland sleeve.and internal Dartsas the SMC solenold valves.The end landsot the spoolformtheirown pilotplston,allowingpilotair to act uponthe endot the spooldlrectly,and avoidingthe needtor anyelastomerseals. All Captlv€(M6lrlc)Fasl€ners All fastenerswhich hold the valveassemblytogetharare standard m9tric faslen€rs,captlve in their rospectiveparts, to avoid loss Onlythe hold-downbolts durlngassemblyand/ordis-assembly. to arenot captive,to allowthe useof hold-down boltsappropriate the sub-plaie-being used. (Most ol these valves are interchangeablewith competitivevalveson the competitivesubDlates.)
Thesevalvesweredesignedto cooperatewith air loqic,and every effort has beenmadeto maximizeperformancewhen used in conjunctionwithair logic.
Palerded'Spooland Sl€eve 'lJS Patsnt No.3952775
The SMC patentedspool and sleevemakean idealvalvingaction to co{perate with air logic.The lackof elastomersealsprovldesa unitormresponsefrom cycle to cycle with actuationoccurringat a constantpilot pressureregardless of the pressureswlthinthe varvepassages.
Prlenled' DlftsrentialSleov€Po ing 'US PatentNo.3952775
Providea a shorl strok€whichminlmizesspoolhammerand pro. moteslongbumperlife. NVSA4524,4534, 4544 DoublePilotSpringOlfset Whereto Ue€lt: Appllcallon#1 - To increasespooland sleeveresponse. Standad movlngpan logic output pressureis 50 PSIG(3.44Bar). Whenpilotpressurebuildsup in the "A" pilotchamber,the spool shifts tully at about t0 PSIG(0.69Bar).This producesa very tast response. Afterthe valvehasshlfted,the pressu/ein the "A" pilot bulldsup to thefull 50 PSIG. Whenthe logicsystemexhaustsihe "A" pllot,the pressurein the "A" pilot chambermust decayfrom 50 PSIGall the way downto b€low10 PSIGb€toreth€ springcan returnthe spool,a timeconsumingprocess.
Pilot volumes have been held to a practical minimum. This. coupledwith the €xtremelyshort spool stroke and tow pitot pressure required for actualion, provides remarkablyfast response lo the incomingpilotsignal.
l f , a t t h e s a m et l m et h e ' , A " p i l o ti s e x h a u s t e d t h, e , , B , ' p i l o ti s pressurized,then as the pressurein .,A', pilot decays, the pressurein the "B" pilot bultdsup.Whenthe prsssurein the,,B" pilot is within 1OPSIot ihat in the "A" pllot, the sprlng relurnsthe spool. This actlon signlflcantlyreducesthe time reeuiredto returnthe valvespoolto the initialDosition. Application*2 - Topreventshiftingof the spoolby pressurizing the "8" pilot. lf the "8" pilotis pressurized, pressurizing the ..A"pitothasno eftect. Tho spool does not shift. Thus,it is possibleto intertocklhe actionof the valveby pressurlzing thei,B" pilotto preventthe ,,A" pllotfromactuatingthevalve,
23
SERIES NVSA NVSA4
DIREGTIOI{ALAIR VALVE PILOTOPTIONS
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PILOTOPTIONSAND FEATURES Juncllon Box Pllol Connectlons All sub-platemountedmodelsoffer an optlonal$et ot #10€2pllot portsviithinlhe iunctionbox in the top of lhe valvebody,and a largetappedlunctlonbox cover,whichallowspllot tubingto be run intolhe valvethroughelectricalconduit,Sealtite,or alr hose as wiresare run into the electricalvalt/"s.Push-onbarbslor 'tl16, l.D.pilottubingaresuppliedinstalledin lhe pilotcovers. ultlpls External Pilot Porls All modelscarry four externalpilot ports in ihe four sides oI the pilotcap. Thoseportsmay be usedor plugged,as desired.One popularuse is to inslajl a pressuraindicalor In one porl to show whetherpilot pressureis applied,glmilarto the functionof elec. tricalpllotlightEon the solenoidvalves. t||anualOperalorE All modelsolfer an optional rscessednon-lockingoperalor.This is a dust-tlghtsplash-proot, air.tightunitwhichpushesdirectlyon the end of the spool bumperto movethe main spool directly. Bacauselhe operator is sealed and alr-tight, the pilot pr€ssure acla upon th€ inner end of the operatorstem as though il were a piston, and ln lroubleshooting,you can prEss gently on the opsratorand tell whetherthe.e is preseurein that pllot chamber. All operatorshavetheir own return sprlngs,and do noi interfere trrllhnorrnalgpoolacllon whenthey arenol in use. Int€]nalPilotPortsIn Ga8k€lFrco All bodies provideinternal 2 mm. pjlol passagesdrllled oui of the mounting face of ihe body, for use on sub.plaleswhich provlde Dllotconnections In the sub-Dlate.
PILOTINDICATORS Thesebrassplugs when placedlnto the 1/8'Pilot Portsof an "A" or "B" styls NVSAallow you to know il and when presaureis in the pilot cavity.You havean option of either a red or gresn risinq pinon yourindlcator.
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HOWTO ORDER DESCRIPTION PARTNO. suFFtx No. vR 3110.01R Red"Pop Up" lndicato liS" NPTF vR 3110-0tG v2 Green"Pop Up" Indicator1/8" NPTF
IXITtENS|ONS A B D E c F 0.39 0.16 0.67 o.12 0.14 0.39 (r0) (4'l ( n (3) (3.5' (r0) Millimdl€rs'n Parorfibs€s
Examole:NVSA4124-52AV2
Distributedby:
6srvE' 12M 9/93
9[\f.9",Bnp;;lll#$csr.lnc ' Telex:27-2184 . Fax:317-899-3102 Fhone:317-899-4440
Subject to Change
Specifications subiect to change llYithoulnotice.
WorldWideQS\E Support... (762-7621) North American Branch Offices Fora branchofficenearyoucall:1-800-SMC-SMC1 SMC Pneumatics Inc. (Atlanta) 1440 Lakes Parkway,Suite 600 Lawrenceville,GA 30043 Tel: (770) 624-1940 FAX: (770) 624-1943
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SMCoffers the samequality and engineeringexpertisein many other pneumaticcomponents Valves DirectionalControlValves ManualValves Mufflers ExhaustCleaners Quick ExhaustValves
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SMC PneumaticsInc.
P.O.Box 26640, Indianapolis,lN 46226 Tel:(317)899-4440.FAX:(317)899-3102 O 1978-1999SMC Pneumatics,Inc.All RightsReserved. RevisedOctober1999
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