Blowdown Service Valves
Standard materials are Carbon Steel A105, Low Alloy F22 or F91. For both applications, other materials are available upon request. Clampseal blowdown valves are fully serviceable in-line using standard Conval tools. The valves feature a uniform one-piece gland, which eliminates the potential for stem damage or packing leaks from gland cocking. With pressure assisted bonnet seal, the cartridge-style packing chamber allows rapid access to valve trim for inspection and maintenance. The pressure seal backseat provides maximum valve integrity by ensuring a positive internal guide for the valve and stem and disc assembly. This also securely isolates the packing from line pressure when the valves is fully open, to increase packing life.