Praher Wafer Check Valve S4 PP

Product catalog summary

General Specifications:
The Wafer Type Check Valve S4 is available in materials such as PVC-U, PP, and PVDF, with sealing materials EMPD and FPM. It is designed for dimensions ranging from DN32 to DN500. Two types are available: S4.60 without a return spring and S4.70 with a return spring, using stainless steel or Hastelloy C4 for the spring material.

Technical Features:
The valve features a simple and robust construction, suitable for mounting between DIN backing flange PN10. It includes a supporting ring for assembly, offers low pressure drop, and requires no maintenance. The opening pressure with a spring is approximately 20 mbar higher.

Dimensions:
Detailed dimensions are provided for various DN sizes, both with and without springs, including measurements for body, disc, screw, ring screw, O-rings, spring, type plate, and spacer.

Operating Pressure:
The maximum operating pressure varies by material and size, with PVC, PP, and PVDF supporting different pressures at 20°C. Temperature effects further influence these pressures, with specific values provided for different temperature ranges.

Installation Instructions:
A back pressure of 0.3 bar is necessary for maintaining pressure tightness. Installation should avoid direct placement on pump flanges or bends, and a relief area of five times the DN size should be considered before and after the valve.

Recommendations:
For vibrant flow situations, the S4.70 type with a spring is recommended over the S4.60 type without a spring. PP piping systems should use special fittings to ensure optimal disc opening and avoid damage.

Additional Information:
The document includes a pressure loss diagram and a Cv-value table for different DN sizes, indicating flow rates in m³/h at 20°C.

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

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Technical 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!

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Technical 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!

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Technical 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

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Technical 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 damages...

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Praher Wafer Check Valve S4 PP

Praher Wafer Check Valve S4 PP

Catalog excerpts

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