Group: Praher Group
Catalog excerpts
Technical data Wafer type check valve S4 General: • Material: • Sealing Material: • Dimensions: PVC-U / PP / PVDF EMPD / FPM DN32 – DN500 Types: • S4.60 without return spring • S4.70 with return spring Spring material: • Stainless Steel 1.4571 • Hastelloy C4 Operating pressure: • see table • simple and robust construction • mounting between DIN backing flange PN10 • supporting ring for assembling • low pressure drop • opening pressure with spring is about 20 mbar higher • maintenance free Exit supports: • Offers better opening position oft he disc = better flow characteristics = less pressure drop 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/13/07/326 Subject to technical modif
Open the catalog to page 1Technical data Wafer type check valve S4 Body Disc Screw Ring screw O-Ring O-Ring Spring Typ plate Spacer Flat gasket Backing flange PN 10 For flange adaptors PVC-PP-PE Without spring with spring © Praher Kunststofftechnik GmbH DB/EN/DEEN/13/07/326 Subject to technical modifications!
Open the catalog to page 2Technical data Wafer type check valve S4 Dimensions exit support for PP Stub Flanges: © Praher Kunststofftechnik GmbH DB/EN/DEEN/13/07/326 Subject to technical modifications!
Open the catalog to page 3Technical data Wafer type check valve S4 Maximum operating pressure: Operating pressure in in relation to size and material (temperature 20° C) DN 32 40 50 65 80 100 125 150 200 250 300 350 400 500 Maximum operating temperature in relation to seals: © Praher Kunststofftechnik GmbH DB/EN/DEEN/13/07/326 Subject to technical modifications! Maximum operating pressure in , resulting from temperat
Open the catalog to page 4Technical data Wafer type check valve S4 Pressure loss diagram CV-Wert Table DN Cv-Value (m³/h) Installation instructions: A back pressure of 0,3 bar is necessary to maintain the pressure tightness the valve. For installation on pumps (pressure part) please note the following: - No direct installation on pump flanges or bend - Befor and after the wafer the check valve, a relieve area for the flow of 5 times the used DN must be considered Caution: PP Piping Systems shall be equipped with the special fitting on the opening gate to enable the est possible opening of the disc. This avoids...
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