Self-closing Vacuum Breaker shall be provided in Thermoplastic body material [PVC or Polypropylene or KynarŽ PVDF] with PFA encapsulated stainless steel spring for a bubble-tight seal, installable in any position. It shall be leak free, normally closed, and self-cleaning. Spring-loaded poppet shall have [VitonŽ or EPDM or Buna-nitrile] seal, and automatically position itself against identical location each time for long cycle life and higher dependability. VBS check valve shall be of size [1˝" or 2" or 3"] with [NPTF threaded or socket] ends, with union nuts to simplify valve installation, inspection and removal. Vacuum Breaker will begin to break a vacuum at approximately 2 inches of Mercury (1.0 psi or 0.07 Bar negative pressure).
All units are to be 100% individually tested at the factory. As manufactured by Plast-O-Matic Valves Inc., Cedar Grove, NJ