External trunnion design available in certain sizes. INTERNAL TRUNNION DESIGN: Upper and lower bearing plates hold the ball in place, preventing the ball from floating axially and avoiding excess load on the seats.

Additionally, secondary graphite body seals and flexible graphite packing prevents leakage through the body joints and stuffing box, respectively. Both play a key safety role in double block and bleed and/or double isolation and bleed valve configurations.ĭOUBLE BLOCK AND BLEED: This safety feature eliminates the buildup of pressure due to high pressure media trapped in the valve’s body cavity, even while the valve is in the fully closed position.įIRESAFE DESIGN: Secondary metal seat design provides a firesafe shut off per API 607. Vent ports located at the top of the body cavity eliminate any gas trapped in the body cavity of a fullyĬlosed valve. Or unplanned spikes in operating conditions.ĭRAIN AND VENT PORTS: Drain ports located at the bottom of the valve release any fluid trapped in the body cavity of a closed valve. This creates a positive seal in the case of seat leakage due to service impurities EMERGENCY STEM SEALANT INJECTION:This standard feature allows the valve’s stem housing to be adapted with a grease fitting to inject sealant during emergency scenarios, providing protection against unplanned spikes inĮMERGENCY SEAT SEALANT INJECTION: This optional feature allows the valve’s end connections to be adapted with a grease fitting to inject sealant.

Api 6d standard