Austrian valve manufacturer Praher Valves has continued to expanded its range with the introduction of their new generation K4 swing check valve in PVC, PP, PPGF (polypropylene glass filled) and PVDF, for applications involving water and many chemicals, up to 10 bar pressure.
The K4 swing check valve is a wafer style, with a body featuring universal mounting holes making these valves suitable for use with BS, DIN, ANSI, ASTM and JIS flanges. Seal options are EPDM and FPM.
The wide opening angle of the flap (83º) ensures much higher flow rates and lower pressure drops than have been available from thermoplastic swing checks of the previous thin wafer design.
The design of the K4 body eliminates the need to provide an additional spacer piece or pipe extension to prevent fouling of the flap on the inside diameter of the pipe.
All wetted parts are made from corrosion resistant thermoplastic and an open/closed optical position indicator is provided as standard.
Valve closing is spring assisted by the inclusion of nested springs in the non-wetted area of the valve and by using a combination of the springs provided; optimum spring settings can be made for application pressures of 3, 7 and 10 bar.
Available in sizes from DN65 (2-1/2”) to DN300 (12”)
The new design incorporates a reinforced flap and support lugs on the inside of the body to minimise the risk of flap breakage as a result of shock or water hammer.
Every valve manufactured by Praher is individually tested under water and all of their manufacturing plants are quality accredited to ISO 9000.
The new K4 swing check valve is available from Air & Hydraulic Systems .