ZIGONG WEITE VALVE MFG CO., LTD
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Big Size Cast Steel Body Trunnion Mounted Ball Valve Size 30 Inch Class 300
Product Description
The trunnion mounted ball valve has automatic pressure release function. When the temperature
of the medium in the valve increases and the abnormal pressure rises, the trunnion mounted ball valve can
automatically release the pressure without a safety valve, which is very important to ensure the safety of
industrial production.
Trunnion Mounted Ball Valve Content
| Design standard | API6D | ||
| Size | 18'' | ||
| Pressure | 600LB | ||
| Body Material | WCB | ||
| Accord With | NACE MR-01-75 | ||
| Inspection and Test | API 6D, API598 | ||
Design Feature
Upstream Seal Two-way Valve
Fire-Safe Design API 607/API 6FA
Stem and Seat Emergency Sealant Injection
Double Block and Bleed
Trunnion Mounted Ball Valve Test Procedure
| HYDROSTATIC SEAL TEST API 6D 10.3 and 10.4 | ||||||
| Sequence | Area Pressure | Duration(min) | Description | |||
| SHELL TEST | A | 1.5xPN | 6″-10″ | 5 | 1. Valve in partial open.
| |
| B | 1.5xPN | 12″-18″ | 15 | |||
| C | 1.5xPN | 20″-60″ | 30 | |||
| SEAT TEST | A | 1.1xPN | 5 | Seat hydrostatic seal at A end towards body B | ||
| B | Atmospheric | |||||
| C | Atmospheric | |||||
| A | Atmospheric | 5 | Seat hydro seal at C end towards body B | |||
| B | Atmospheric | |||||
| C | 1.1xPN | |||||
| A | 1.1xPN | 5 | Seat hydro seal test for both A and C | |||
| B | Atmospheric | |||||
| C | 1.1xPN | |||||
| AIR SEAL TEST API 6D 10.4 | ||||||
| SEAT TEST | A | Atmospheric | 5 | Seat air seal test at A end towards body B | ||
| B | Atmospheric | |||||
| C | 80PSLG(5.5bar) | |||||
| A | 80PSLG(5.5bar) | 5 | Seat air seal test at C end towards body B | |||
| B | 80PSLG(5.5bar) | |||||
| C | Atmospheric | |||||
Company Profile
Zigong Weite Valve Mfg Co., Ltd. was established in 2007,we have a plant area of 15,400 m² and is equipped
with a technology research and development center.Our R&D team consists of experienced superior valve
experts and engineers that can according to customers’ requirement for OEM and ODM.
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