Featuring reliable and simple design principles, Red Point’s pressure seal bonnet (PSB) has a proven ability to handle increasingly demanding applications. PSB valve designs weigh significantly less than bolted bonnet (BB) designs. BB design body flanges and bonnet flanges are joined by studs/nuts and a gasket inserted between the faces to create a seal. When tightened to the prescribed torques, these allow optimal sealing. When a system’s pressure increases, so too does the potential for a leak through the body/bonnet joint. Our pressure seal design is equipped with bonnet lift-up bolts (live-loading type) to pull the bonnet up and create a secure seal against the pressure seal gasket. This creates a seal between the gasket and the ID of the valve body, while our segmented thrust ring carries the load. So, when system pressure builds up, so too does the load on the bonnet and pressure seal gasket. As a result, when the system pressure increases, the potential for a leak through the body/bonnet joint significantly decreases. The minimum consistent operating pressure is in excess of 525psi.
This Pressure Seal GLOBE VALVE 8″ 600 lbs BW A105N TRIM 410 is a perfect example.