High Pressure Carbon Steel Ball Valves
Key Specifications / Features
Name: High Pressure Carbon Steel Ball Valves
Type: Trunnion Ball Valve
Body: Carbon Steel, Forged Steel
Bonnet: Carbon Steel, Forged Steel
Trim: Carbon Steel, Stainless Steel
Pressure Relieving Seat:
When a trunnion ball valve is in the closed position, media will be trapped in the body cavity. Unless this media is drained, it will be subjected to thermal expansion and contraction. As the temperature rises, the trapped media desires to expand and the pressure increases in the area shown as (Pb).
In order to avoid excessive pressure build-up, the seats are designed to self-relieve, allowing the media in the body to escape to the pipeline. In this case, we have shown it to relieve to the downstream side (Pd). This self-relieving seat design feature is standard on all Relia trunnion ball valves.