Transcript
Regulators Direct Operated Pressure
Direct Operated Pressure Regulator LRV2 The LRV2 is a direct operated pressure regulator suitable for liquid applications.
Model ➪ Sizes Connections Construction Options
19
LRV2S 1/2" , 3/4", 1"
21
2
NPT Bronze 3 4
LRV2B with phosphor bronze/brass bellows. LRV2S with stainless steel (316Ti/316L) bellows.
7 1
C ONSTRUCTION M ATERIALS No. 1 2 3 4
Part Spring Housing Adjustment Hand Wheel Top Spring Plate Pressure Adjustment Spring Bellows Assembly Bellows Assembly Gasket Cap Screws
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Body Guide Bush Pushrod Valve Seat Valve Seat Gasket Piston Valve Head Piston Return Spring Strainer Screen Cap Cap Gasket Spring Range ID Plate Bulkhead Plate Tamperproof Pin
Material Spec. Aluminum - Epoxy coated LM 24 Plastic—Polypropylene Cast Iron DIN 1691 GG 20 Silicone Chrome BS 2803 685 A55 Spring Steel Range 2 Stainless Steel optional 316Ti/316L Reinforced Exfoliated Graphite Steel—Zinc plated BS 3692 Gr 8.8 M8 x 25 mm Bronze BS1400 LG2 Graphite filled PTFE Stainless Steel ASTM A276 316L Stainless Steel BS 970 431 S29 Stainless Steel BS 1449 316 S11 Stainless Steel BS970 431 S29 Nitrile Rubber Stainless Steel BS2056 Gr302 S26 Stainless Steel BS 1449 304 S16 Brass BS 2872 CZ 122 Reinforced Expholiated Graphite Polypropylene Stainless Steel 316L Mild Steel - Copper Plated
6
Closest Equivalent
5
ASTM A27B Cl.30
20
9 10
8
316Ti/316L
12 11
ANSI B18.2.3.2M
16
ASTM B62 UNS 083600
14 15
ASTM A276 Gr. 431 AISI 316 ASTM A276 Gr.431
13
18 17
AISI 304 ASTM B283 UNS 3770
E Withdrawal Distance
L IMITING O PERATING C ONDITIONS - L IQUID Max. Upstream Pressure Max. Downstream Pressure Max. Cold Hydraulic Test
200 psig (14 barg) 115 psig (8.6 barg) 550 psig (38 barg)
C
200 167 150
93.3 75 65.6
100
37.8
50 0
10 0
Temperature ˚C
Temperature ˚F
Pressure barg 1.7 3.4 5.1 6.8 8.6 10.3 12.0 13.7
B
D
25 50 75 100 125 150 175 200 Pressure psig
F Withdrawal Distance
A
Do not use in this region
D IMENSIONS D OWNSTREAM P RESSURE R ANGES For the following downstream pressures, three color-coded springs are available. Where the pressures overlap, use the lowest pressure spring to give the downstream pressure required:
Grey: 5 to 25 psi Green: 20 to 58 psi Orange: 51 to 125 psi 0.35 to 1.7 barg 1.4 to 4.0 barg 3.5 to 8.6 barg
Size 1/2" 3/4" 1"
A 3.26 83 3.78 96 4.25 108
B 2.44 62 2.44 62 2.44 62
( NOMINAL )
C 5.11 130 5.11 130 5.11 130
IN INCHES AND MILLIMETERS
D 1.26 32 1.26 32 1.26 32
E .98 25 .98 25 .98 25
F 1.57 40 1.57 40 1.57 40
WEIGHT 4.41 lb 2.0 kg 4.41 lb 2.0 kg 4.41 lb 2.0 kg
Local regulation may restrict the use of this product below the conditions quoted. Limiting conditions refer to standard connections only. In the interests of development and improvement of the product, we reserve the right to change the specification. TI-3-103-US 07.97
Direct Operated Pressure
CAPACITIES
Regulators
Direct Operated Pressure Regulator LRV2 – Water capacities in gpm
S PARE PAR TS
Full lift capacities for safety valve sizing are shown below: 1/2" (DN15)
3/4" (DN20)
1" (DN25)
2.4 (2.1)
4.2 (3.6)
5.0 (4.3)
Cvs (Kvs)
Q
180 (12) 210 (14)
165 (11)
150 (10)
Pressure Adjustment Spring
G Spring Housing Cap Screw
165 (11)
135 (9) D 135 (9)
105 (7)
E Bellows 105 (7)
90 (6)
75 (5) 75 (5) 60 (4)
Upstream pressure psig (barg)
45 (3)
K R L
F
M
M
Valve and Seat Assembly
Set
Gasket Set
V U
15 (1)
S
S
T
0 0
1.3
Capacity 0 gpm
2.6
0
2.6 5.2
3.9 7.8
5.2 6.5 10.4
7.8 9.1 10.4 11.7 13
15.6
18.2 20.8
13 14.3 15.6 16.9 18.2 19.5 20.8 22.1 23.4 1/2" DN 15 23.4
26
28.6 31.2 33.8 36.4
39 41.6 3/4" DN 20
2.6 5.2 7.8 10.4 13 15.6 18.2 20.8 23.4 26 28.6 31.2 33.8 36.4 39 41.6 44.2 46.8 49.4 52
1" DN 25
TO USE THE CHAR T
The curved lines labelled 45, 70, 105, etc., represent upstream pressures. Downstream pressure is read along the vertical line on the left hand side of the chart. Example: Required, a reducing valve to pass water at the rate of 11.7 gpm reducing from 105 to 60 psi. From the downstream pressure of 60 psi on the left hand side of the chart extend out horizontally until the line meets the curved 105 upstream line. At the point read vertically downwards where it will be seen that a 1/2" valve (with a 51-125 psi spring) will be required.
H OW
F
45 (3)
30 (2)
H OW
F
TO ORDER
1-1/2" Spirax Sarco LRV2 Pressure Reducing Valve with Gunmetal body and fitted with orange spring (51 to 125 psi).
I NSTALLATION The valve should be installed in a horizontal pipeline with the direction of flow as indicated by the arrow on the valve body. Full installation and maintenance instructions are supplied with the product.
Spare Parts The spare parts available are shown in heavy outline. Parts drawn in broken line are not supplied as spares. AVAILABLE SPARE
* Pressure Adjustment Spring Grey 0.35/1.7 bar g D, Q Green 1.4/4.0 bar g D, Q Orange 3.5/8.6 bar g D, Q * Bellows Assembly - Phosphor Bronze E, F * Spring Housing Cap Screws (set of 4) G * Piston and Seat Assembly F, K, R, L, M V, U, T, S * Gasket Set F, M, S * Screen T * Common to all sizes How to order Always order spares by using the description given in the column headed Available Spare and stating the size, type and pressure range of the reducing valve. Example: Pressure Adjustment Spring, pressure range 51-125 psi (orange) for 1/2" Spirax Sarco Type LRV2 Reducing Valve.
TIS 3.103 US Spirax Sarco, Inc., 1150 Northpoint Blvd, Blythewood, SC 29016
07.97
Telephone: (803) 714-2000 FAX (803) 714-2222
© Spirax Sarco, Inc. 1997
Downstream pressure psig (barg)
120 (8)
