4 inch Class 900 Carbon Steel Trunnion Mounted Ball Valve WCB
Product Description
Trunnion Mounted ball valve has two pieces and three pieces of two body structure, the flange is connected with bolts,
sealed with reinforced PTFE INlaid into the stainless steel ring, the rear of the ring is provided with a spring to ensure
that the seat close to the ball, keep the seal.
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.
2. Set the pressure to 150% PN.
3. Reduce the pressure to 50% PN.
4. Reset the pressure to 150% PN.
5. Hold the pressure for the duration of testing.
|
| 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 |
Trunnion Mounted Ball Valve Characteristic
Bolted Body - Three Piece
Bore Type - Full Bore
Anti-Static Device
Blow-Out Proof Stem
Fire Safe Design
Emergency Sealant Injector
Double Block and Bleed
Copmpany Profile
Zigong Weite Valve Mfg Co., Ltd. is a professional Manufacture factory, we have been in valve field more than 15 years.
Manufacture and selling Various ball valves(types of floating, Trunnion Mounted, top entry,all welded, metal seal HPHT,
Three-way,Four-way etc.).
Product Tags:
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OEM ODM 900lb Trunnion Mounted Ball Valve DBB 4 Inch Bolts Connected Images
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