Wafer check valve K4
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Technical data Wafer check valve K4 General:  Body material:  Disc material:  Sealing material:  Dimensions:  Standards: PVC-U / PP PPGF / PVDF PVC-U / PP PPGF / PVDF EPDM / FPM DN65 – DN250 d75 – d280 2 ½“ – 10“ DIN 2501 ANSI B 16,5 JIS 10K Operating pressure:  PVC  PP  PPGF DN65 – DN200 DN250  PVDF Adjusted springs and combinations of springs to operating pressure see page 4  Only plastics and O-Rings are in touch with medium  Excellent flow rates  Disc opening up to 85°  Optional with indicator and springs or without indicator and springs  Optional spring force for an operating pressure up to 3, 7 or 10 bar (details siehe page 5)  Easy and quick installation by means of integrated sizing hole template  No more discharge aids necessary This document does not constitute a guarantee, it is for initial information purposes only. The product range is continually upgraded, the designs and types therefore only reflect the state of the art at the time of printing. Subject to technical modifications! © Praher Kunststofftechnik GmbH DB/EN/DEEN/13/10/219B Subject to t

Technical data Wafer check valve K4 Option flange standard © Praher Kunststofftechnik GmbH DB/EN/DEEN/13/10/219B Subject to technical modi

Technical data Wafer check valve K4 Exploded drawing: Version with indicator and spring Body Disc O-Ring disc Fixing bolt left Fixing bolt right O-Ringe body Indicatior pin with O-Ring Spring PN3 Spring PN7 | PN6 für PP Cap transparent Version without indicator Body Disc O-Ring disc Fixing bolt left Fixing bolt right O-Ring body Plug with O-Ring Cap black © Praher Kunststofftechnik GmbH DB/EN/DEEN/13/10/219B Subject to technical modifications!

Technical data Wafer check valve K4 Diagrams: Pressure – Temperature – Diagram PP © Praher Kunststofftechnik GmbH DB/EN/DEEN/13/10/219B Subject to technical modifications!

Technical data Wafer check valve K4 Springs and combinations of springs Operating pressure Example: Operating pressure 7 bar = combination of springs 1 & 2 Operating pressure 6 bar = spring 1 Operating pressure 2 bar = spring 2 ATTENTION: A backpressure of 0,03 bar is required for a leak-free valve Pressure level at 20°C (PN) ATTENTION: Respect the pressure – temperatur diagrams für wafer check valves K4! © Praher Kunststofftechnik GmbH DB/EN/DEEN/13/10/219B Subject to technical modifications! Pressure loss diagram

Technical data Wafer check valve K4 Cv value table pressure loss Value pressure loss of the diagram, result in the case of maximum opening angle! (85°) Tightening torque for flange connections DN © Praher Kunststofftechnik GmbH DB/EN/DEEN/13/10/219B Subject to technical modifications! Installation instructions: For installation on pumps (pressure part) please note the following: - No direct installation on pump flanges or bend. - Before and after the wafer the check valve, a relieve area for the flow of 5 times the used DN must be considered.