All IPV valves have been subjected to thorough development and testing to prove their suitability for industrial control requirements. All valves are subjected to careful visual and testing inspection prior to shipment.
Our catalog is intended as a guide to assist in valve selection. Individual valve specifications as well as part numbers can be obtained by contacting our office.
WHY PLASTIC VALVES?
Industry’s demand for plastic products is constantly increasing due to the many advantages they offer over metal products.
Plastics, while having the superior advantages listed above, have the disadvantage of not being as hard or strong as metals. Care must be taken when screwing metal fittings into plastic valve bodies. Generally, teflon tape is recommended on pipe threaded connections. If possible, use plastic type fittings on plastic valve bodies. If a plastic system is constructed properly it will offer trouble free service in addition to the advantages listed above.
PLASTIC MATERIALS
PVC (Polyvinyl Chloride) is one of the oldest synthetic thermoplastics. It has excellent resistance to aqueous solutions of acids, alkalis, salts and oils. Its fluid temperature range is to +120 degrees –F. Its low cost, lightweight construction and good resistance to strong oxidizing agents make it a superior material for use in the industrial market.
NORYL GTX (PPE / PA) is a strong rigid plastic blend that provides low water absorption with a high heat resistance. It is an extremely chemically resistant material able to withstand automotive fuels, greases and oils. In addition, Noryl GTX resin is resistant to detergents, alcohols and alkaline chemicals. Its fluid temperature range is to +300 degrees –F. It can withstand short term temperatures of over +400 degrees-F.
PP (Polypropylene) is generally better solvent resistant than PVC. It is one of the lightest plastics known and one of the most widely used. Because of the absence of nonhydrocarbon pendent groups, PP possesses a resistance to many corrosive chemicals that PVC cannot tolerate. The addition of glass fiber to polypropylene gives this thermoplastic extreme strength in any environment. Its working temperature is to +180 degrees –F.
ELASTOMERS
Buna-N (Nitrile Rubber) is superior to all other listed elastomers with regard to compression set, abrasion and tear resistance. It is recommended for general purpose sealing of water, silicone greases, petroleum oils and fluids. It offers a temperature range of –20 degrees –F to +180 degrees –F.
EPDM (Ethylene Propylene) can withstand a variety of acids, alcohols and oxidizing chemicals. It is not however recommended for use with petroleum-based fluids. EPDM has a useful temperature range of –20 degrees – F. to +250 degrees – F for most applications.
Viton (Fluoro Elastomer) has a wide range of chemical compatibility. It is recommended for most acid applications and the handling of hydrocarbons such a kerosene, gasoline and cleaning solvents. These chemicals would often cause Buna-N rubber to swell. Viton has a useful temperature range of –10 degrees -F. to +300 degrees -F.