Dwyer Instruments has developed a new series of thermoplastic butterfly valves for chemical and wastewater applications.
The valves have a one-piece body design which incorporates fully supported flanged bolt holes to prevent stressing of the mating pipe flanges. They also feature a blowout-proof stainless steel stem and a unique, full body liner that has a V-notch retention design, which helps create a positive sealing of the liner to the valve body. There is also an integrally moulded face seal which provides positive sealing against the mating flange without the need for additional gaskets.
They are available in both polyvinyl chloride (PVC) and chlorinated polyvinyl chloride (CPVC), featuring either an ethylene propylene diene monomer (EPDM) rubber or Fluorocarbon Rubber (FPM) liner/seal.