Fully Welded Ball Valve
Carboon Steel, WCB,CF8/CF8M,CF3/CF3M,Cast Steel,etc
Fully Weleded Ball Valves Products:
Trunnion Ball Valve
Design Basis GB API ASME
Design Standard GB/T 12237 GB/T 19672 API 608 API 6D ASME B 16.34
Face To Face GB/T 12221 GB/T 19672 ASME B 16.10 API 6D ASME B 16.10
Connection Flanged GB/T 9113 ASME B 16.5/MSS SP-44/ASME B 16.47
End Butt-Welding GB/T 12224 ASME B 16.25
Material NACE MR0175
Test and Inspection JB/T 9092 GB/T19672 API598 API 6D ASME B16.34
PS: We also can do according to customer's requirements.
1. Urgent Grease Injection Device: Trunnion ball valve(DN≥150) aims to prevent the medium leakage of the seal ring and stem.
2. Blow-out proof stem: Prevent the stem blowing out caused by the abnormal increase of pressure.
3. Fire-proof Design: When the fire disaster occurs, and the non-metallic seat and sealing parts are damaged
under high temperature, our unique design of metal to metal auxiliary seal structure has an deep effect to
prevent the leakage of the media.
4. Anti-static Design: DBV trunnion ball valve design forms a electrostatic channel through ball, stem and body. This structure leads the electrostatic spark to the earth caused by the friction between the ball and the seat. This structure could avoid the fire disaster and explosive accident.
5. Standard Single Piston Action（Self-relieving Seat）: The fluid pressure, both upstream and downstream creates a resultant thrust that pushes the seat rings closed to the ball. The fluid pressure acting in the body cavity creates a resultant thrust that pushes the seat rings away from the ball. The single piston design permits the automatic release of any over pressure in the body cavity when the valve is in the fully open or fully closed position, therefore the seat rings are "self-relieving".
Optional Double Piston Action: The fluid pressure acting in the body cavity, both upstream and downstream creates a resultant thrust that pushes the seat rings closed to the ball. The seat rings of the valve with double piston action require a relief valve in order to reduce the over pressure in the body cavity.
6. Actuator Installation Yoke: This structure facilitates to install the actuators, such as pneumatic, electric, ,hydraulic and pneumatic&hydraulic, etc.
Material for Main Parts
WCB, CF8, CF8M, LCB, LCC, A105, F304/L, F316/L, LF2, etc
25+ENP, A105+ENP, 304, 316, LF2+ENP, etc.
17-4PH,304,316, 1Cr13, 2Cr13, 410,420,LF2 etc.
PTFE, RPTFE, DEVLON, PEEK, 304+ni55, 316+ni55, LF2+NI55, 304+STL,316+STL
Bare Shaft Handwheel
Pneumatic Actuator Gear Operated
1. Factory Overview
2. Quality Control
3. Storage and Warehouse
4. Package and Delivery
5. Honor and Certificate
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