Piston valves have a closure member shaped like a piston. When the valve opens, no flow is observed until the piston is fully moved from the seat bore, and when the valve closes the piston removes any solids that might have deposited on the seat. Therefore, piston valves are used with fluids that have solid particles in suspension.

Valve glands and seats are the typical locations where leaking takes place. We provide piston valves which are glandless isolation and offer leak-proof sealing. This unique design gives ensurity of long life even at high temperatures such as 427° C.