Description
A single thermoplastic valve, designed for severe service applications with virtually every type of liquid. For pressure, drain or vacuum service. Valves are spring return normally-closed and direct-acting with a simple push-pull plunger design. There is no minimum pressure required for operation. The PTFE bellows shaft seal eliminates the need for an elastomer seal which can weaken as a result of chemical attack. The PTFE bellows assures smooth, non-sticking operation and exceptionally long cycle life; over 2 million in laboratory conditions. The bellows design also allows a stock valve to be used for vacuum or pressure. The poppet seat ensures bubble-tight shutoff.
