Pressure Reducing Valves DM 762
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Pressure Control Valves Pressure Reducing Valves DM 762 MANKENBERG GmbH | Spenglerstraße 99 | D-23556 Lübeck www.mankenberg.de | Tel. +49 (0) 451 - 8 79 75 0 Millibar Control Valve Technical Data Connection DN Connection G Nominal Pressure PN Inlet Pressure Outlet Pressure Kvs-Value Temperature Medium 15 - 50 1/2 - 2 16 up to 16 bar 0.002 - 0.52 bar 0.2 - 3.6 m3/h 130 °C liquids and gases Description Medium-controlled pressure reducers are simple control valves offering accurate control while being easy to install and maintain. They control the pressure downstream of the valve without requiring pneumatic or electrical control elements. The DM 762 pressure reducing valve is a diaphragm-controlled spring-loaded proportional control valve for very small outlet pressures and large volumes. This pressure reducer is manufactured from deep-drawn stainless steel featuring excellent corrosion resistance. The valve cone is fitted with a soft seal. The outlet pressure to be controlled is balanced across the diaphragm by the force of the valve spring (set pressure). As the outlet pressure rises above the pressure set using the adjusting screw, the valve cone moves towards the seat and the volume of medium is reduced. As the outlet pressure drops the valve control orifice increases; when the pipeline is depressurised the valve is open. Rotating the adjusting screw clockwise increases the outlet pressure. 2.2 2.8 3.6 Setting Ranges [bar] diaphragm diameter 500 mm 0.002 - 0.003 0.003 - 0.015 0.008 - 0.03 0.012 - 0.07 Setting Ranges [bar] diaphragm diameter 360 mm 0.004 - 0.006 0.005 - 0.032 0.015 - 0.06 0.025 - 0.14 Setting Ranges [bar] diaphragm diameter 270 mm 0.008 - 0.016 0.015 - 0.065 0.02 - 0.12 0.05 - 0.28 Setting Ranges [bar] diaphragm diameter 220 mm 0.015 - 0.030 0.025 - 0.125 0.05 - 0.22 0.1 - 0.52 The valves requires a sense line (to be installed on-site). We recommend that G 1 and G 1½ or DN 25 and DN 40 connections be used. These valves are no shut-off elements ensuring a tight closing of the valve. In accordance with the VDI/VDE guideline 2174 a leakage rate of 0.05 percent of the constant volume flow is permitted for the valve in closed position. Standard Page No. DM 762/2.1.123.1 - Standing 18.09.2012 Kvs-Values [m3/h] for all body sizes 0.2 0.9 1.5 » all stainless steel construction » sense line connection Options » » » » pressure gauge connection oil and grease-free version for oxygen clean gas version with special connections for toxic or hazardous media: sealed spring cap complete with leakage line connection (incl. sealed adjusting screw). Must be installed with a leakage line capable of draining leaking medium safely and without pressure » various diaphragm and seal materials suitable for your medium » special connections: Aseptic, ANSI or JIS flanges, NPT, welding spigots; other connections on request » special versions on request Operating instructions, know how and safety instructions must be observed. All the pressure has always been indicated as overpressure. We reserve the right to alter technical specifications without notice. Permissible Reduction Ratio (max. p1/p2) diaphragm Kvs-value [m3/h] diameter 0.2 0.9 1.5 500 15000 7500 4500 360 8000 4000 2500 270 4000 2000 1250 220 2200 1100 660 2.2 2200 1200 600 320 2.8 1500 800 400 210 3.6 1100 650 320 170

Pressure Control Valves Pressure Reducing Valves DM 762 Page No. DM 762/2.1.123.2 - Standing 18.09.2012 MANKENBERG GmbH | Spenglerstraße 99 | D-23556 Lübeck www.mankenberg.de | Tel. +49 (0) 451 - 8 79 75 0 Millibar Control Valve Materials Temperature Body, Spring Cap, Internals, Screws Adjusting Screw Spring Valve Seal Diaphragm 80 °C CrNiMo-steel CrNiMo-steel M10 with handwheel made of Duroplast CrNi-steel CrNi-steel FPM FPM NBR EPDM Dimensions [mm] size nominal diameter G 1/2 3/4 1 1 1/4 1 1/2 A 165 170 170 180 180 B 35 35 35 40 45 C 320 330 330 340 350 D = diaphragm diameter see table...