Transcript
SS2-SSL100-0100
Low Leakage Gland Packing System SECURE-SEALTM OVERVIEW SECURE-SEAL is a seal system that helps reduction of fluid leakage from a control valve gland. Enforcement of regulations that limit the exhaust of the air pollutant VOC (Volatile Organic Compound) from industrial facilities has been enforced in many countries. The VOC exhaust regulation in the U.S. covers the control liability of even minute leakage from a control valve gland. By using a control valve that has a high gland seal performance, users can reduce their loads that are related to this control liability. SECURE-SEAL has the gland seal structure that satisfies such environmental regulations.
FEATURES • Complies with CAAA (Clean Air Act Amendment) in the U.S. The SECURE-SEAL gland seal performance complies with the VOC leakage amount at the atmospheric concentration level, 500 ppm or lower, which is required by the CAAA (Clean Air Act Amendment) enforced by the U.S. EPA (Environmental Protection Agency).
• Maintenance free The Live Load structure that is employed by this system uses spring power to always apply appropriate fastening power to the gland packing. This prevents from strain release of the packing, which may cause fluid leakage. In addition, the gland packing used does not require grease, which eliminates the need for regular grease-up tasks.
• Visible torque control of the gland When the gland nut is tightened, an appropriate spring pressure amount can be set by referring to the mark placed on the spring cover. With this feature, nobody should fail to apply the correct packing tightening torque.
• Flexible application to the existing control valves The gland structure of the existing control valves can be changed to that of SECURE-SEAL by replacing or adding the minimum number of required parts such as the gland stud bolts, packing followers, Belleville spring and so on.
• Asbestos free An asbestos-free type gland packing is used.
-1-
5th Edition
SS2-SSL100-0100
Azbil Corporation
Structure 1 2 3
1. 2. 3. 4. 5.
Spring case Belleville spring Packing follower P4519 packing Spacer
4
The left figure shows “2” Belleville spring is not compressed.
5
Fig 1. CV3000 Alphaplus series, CV3000 series, and Flowing (2 inch or less) (Series design)
B enlarged
1 2 3
B B
5 A
6
4 7
A-A
8 9 10
Fig 2. FloWing (3 inch or over) (Parallel design)
-2-
1. Gland stud 2. Gland nut 3. Packing flange (upper) 4. Packing flange (lower) 5. Belleville spring guide 6. Belleville spring 7. Packing follower 8. Spacer 9. Gland packing 10. Lantern ring
Azbil Corporation
SS2-SSL100-0100
Specifications Applicable control valves CV3000 Alphaplus series Models:
AGVB / AGVM ADVB / ADVM JIS10K / 16K / 20K ANSI Class 150# / Class 300# JPI Class 150# / Class 300# PSA1 / PSA2 / PSA3 / PSA4 / HA4
Press. Rating Combined actuator models: CV3000 Alphaplus series Models:
HLS / HLC / HTS / HSC ACP / HCB / ACN / HCN JIS10K / 16K / 20K ANSI Class 150# / Class 300# JPI Class 150# / Class 300# PSA1 / HA2 / HA3 / HA4
Press. Rating Combined actuator models: FloWingTM Eccentric Rotary Control Valve Models: Press. Rating Combined actuator models:
VFR JIS10K / 20K ANSI Class 150# / Class 300# JPI Class 150# / Class 300# RSA1 / RSA2 / VR3
• Packing Structure and Materials: Packing Name: Operating Temperature Range: Maximum Operating Pressure: Grease:
Braided with PTFE fibers with a carbon fiber core #P4519 -17°C to 230°C 5 MPa Not used for CV3000 Alphaplus and CV3000 series Used for FloWingTM
• Live Load Structure: Materials:
Packing follower pressure application method by using Belleville spring SUS304
• Leakage performance evaluation Test medium: Test method: Performance: Measurement method:
Helium Azbil Corporation original (Combined load of mechanical and thermal cycle) Less than 500 ppm and 100 ppm* at Methane converted level (conforms to ANSI/ISA-93.00.01-100) Complies with U.S.EPA 40 CFR 60 Method 21 *There is a possibility that the temperature range is changed by the combination of actuator.
-3-
Please read the "Terms and Conditions" from the following URL before ordering or use:
http://www.azbil.com/products/bi/order.html Specifications are subject to change without notice.
1-12-2 Kawana, Fujisawa Kanagawa 251-8522 Japan URL: http://www.azbil.com/ 5th Edition: Issued in Oct. 2014 No part of this publication may be reproduced or duplicated without the prior written permission of Azbil Corporation. (10)
