Derovs Valve Industry Co.,Ltd

Products

	Trunnion Ball Valve

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Product Description
Trunnion Mounted Ball Valves Design Feature

Sealing construction of valve seat

Trunnion mounted ball valve has all kinds of sealing construction. Our company produce Trunnion mounted ball valve as API6D designed, according to different working condition with different sealing construction.

Self-Relieving construction

When an abnormal rising of pressure appear in the internal body cavity, the single sealed-structure takes on the function of automatic pressure relieving, while the double-sealed structure can finish the job through a attached pressure-reliving device to the valve body.

Anti-Static Device
Anti-static device is a standard feature of kihsco ball valve. A spring-loaded pin assures the electrical continuity, between ball, stem and body, so as to avoid sparks during turning of the stem to open and close the valve, which could be dangerous in case of hazardous area installation.
Anti Blow-out Stem
The stem is made separately from the ball; The lower end of the stem is designed with an integral collar to be blow-out proof.

Fire Safe Design
External Leakage Prevention
Leakage from the valve stem area is prevented by double sealing with 2 O-rings and top cover gasket. Leakage through the valve body joint is also blocked by double sealing with O-ring and body gasket. After a fire has deteriorated O-rings, top cover gasket, body gasket and stem fire safe packing are the measure that prevents external fluid leakage.

Internal Leakage Prevention

When non-metal materials such as O-ring and seat insert are decomposed or deteriorated
by fire, the edge of the metal seat preloaded by the seat spring comes into contact with ball to
shut off the line fluid to minimize internal leakage through the valve bore.

Emergency Sealant Injection System

For 6 inch and larger kihsco Trunnion mounted ball valves will be installed with a sealant injection fittings on both stem and seats. When the sealing materials (seat sealing or stem o-ring) are damaged or decomposed by fire or other accidental causes, leakage from the seat and stem can be prevented by injection of sealant into these fittings. Fitting also internally installed a second check valve to provides backup sealing.
Product Specification/Models
Technical Data
Size：NPS2~60 、DN50~1500
Pressure Ratings：Class150~1500、PN16~100
Body Materials ：ASTM: WCB(A105) 、CF8（304）、CF3（304L）、CF8M（316）、CF3M（316L）
D I N：GS-C25(St50-2)、1.4308/1.4301、（1.4306）、1.4408(1.4401)、（1.4404）
Design Standard：DIN3356、API 6D、ASME B16.34
Face to Face：DIN EN 558、ASME B16.10
Flanged Ends：DIN EN 1092、ASME B16.5
Test and Inspection：ISO5208, DIN3230、API 6D、API598
Fire-safe Design ：ISO 10497、API 607、 API 6FA
Notes: The sizes of serial valve flange dimension can be designed according to customer� requirement.