RSK. Wafer Type Check Valve. Construction. Features. Advantages

Transcription

1 Wafer Type Check Valve Construction The GEMÜ wafer type check valve is available in plastic or metal and the body, disc and seal can be chosen from various materials. The valve is clamped between two flanges and has a flange seal. It selfcentres in the flanges between the bolt circle. Features Suitable for inert and corrosive* liquid media The valve works according to the swing check principle Can be selected with or without spring return Horizontal or vertical installation possible Advantages Nominal sizes from DN to 00 Eye bolts as installation aids Weight and space saving design Very simple construction low maintenance * See page for information on working medium Special flange adaptors* for wafer type check valvesoptional *The special flange adaptors are to allow the valve flap to open further giving increased flow capability than a normal mating flange. Pipe connection PN PN DN D L da di di dia I D

2 Metal wafer type check valves Nominal size* with body material.0.7 Brass DN * Larger nominal sizes available upon request Body material.0.7 Brass Aluminium Cast bronze 9 Disc material.0.7 Brass Seal material NBR EPDM FPM PTFE Working pressure bar bar bar Return spring Without return spring.7 F Hastelloy F Nominal pressure PN PN PN Manual override Only for metal wafer type check valves H Optional design KNumber Grease and oil free 0 Order example 00 H 0 Type Nominal size Working pressure (code) Nominal pressure (code) Body material (code) Disc material (code) Seal material (code) Return spring (code) Manual override (code) 00 H Optional design (KNumber) 0

3 Plastic wafer type check valves Maximum working pressure in bar due to temperature influence DN C 0 C 0 C C 0 C 0 C 90 C 0 C 0 C 0 C 0 C PVCU PP PVDF Nominal size with body material PVCU, PP, PVDF Working pressure bar bar Nominal pressure PN PN PN Body material DN PVCU PP PVDF 0 Disc material PVCU PP PVDF 0 Seal material NBR EPDM FPM Return spring Without return spring.7 F Hastelloy F Optional design KNumber Grease and oil free 0 Order example 00 0 Type Nominal size Working pressure (code) Nominal pressure (code) Body material (code) Disc material (code) Seal material (code) Return spring (code) 00 Optional design (KNumber) 0

4 Technical data for plastic and metal wafer type check valves Working medium Corrosive and inert liquid media which have no negative impact on the physical and chemical properties of the body, disc and seal materials. See "Technical Information on Plastic Materials" Maximum working pressure acc. to the Pressure Equipment Directive dependent on nominal size and material (temp. 0ºC) PVCU PP PVDF Metal Liquid Liquid Liquid Liquid DN Group * Group ** Group * Group ** Group * Group ** Group * Group ** * explosive, flammable, poisonous, oxidising ** other fluids.. Max. working temperature dependent on seal material NBR EPDM FPM PTFE Hydraulic characteristics GEMÜ 90 C 0 C C C Pressure loss and k v values DN k v [m /h] Pressure loss <bar> Flow < m³/h> c v = k v x The diagram values are valid for water at 0 C. Please contact GEMÜ for the calculation of other fluids.

5 Dimensions in metal without with manual manual override override PN PN PN without with without with spring spring spring spring DN A A A B B B B C D E F Dimensions in plastic without spring with spring DN A B B C D E F * * 9 7 * only valid for PVCU design *

6 Flange bolt torques Thread M M M 0 M M 7 Torque Weight in kg Design DN PVCU PP PVDF Stainless steel Technical data sheet Minimum pressure for disc opening without spring Installation DN horizontal [mbar] vertical [mbar] Subject to alteration 0/ 9 VALVES, ACTUATORS AND CONTROL SYSTEMS GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG FritzMüllerStr. D7 IngelfingenCriesbach Tel. +9 (0) 79/0 Telefax +9 (0) 79/ info@gemue.de