Pressure Reducing Valves DM 765
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Pressure Control Valves Pressure Reducing Valves DM 765 Page No. DM 765/2.1.123.1 - 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 Technical Data Connection G Nominal Pressure PN Inlet Pressure Outlet Pressure Kvs-Value Temperature Medium G 1/2 16 up to 8 bar 0.03 - 0.8 bar 0.2 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 765 pressure reducing valve is a diaphragm-controlled spring-loaded proportional control valve for very small outlet pressures and small volumes. This pressure reducer is manufactured from deep-drawn stainless steel featuring excellent corrosion resistance. The valve cone is fitted with a soft seal. For correct functioning the valve requires a minimum pressure drop of 1 bar (p1 - p2). If a larger valve is needed, please select DM 762 (Kvs rating up to 3.6 m3 /h). The spring module comprising spring cap, spring, adjusting screw, diaphragm and internal components, is connected to the valve body only by means of a clamp ring and two bolts. Changing the diaphragm or the complete spring assembly for a different control pressure range is extremely simple and does not call for special tools. The same applies to servicing and maintenance. 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. 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 » all stainless steel construction » quick-release body clamp ring 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. Kvs-Values [m3/h] for all body sizes 0.2 Setting Ranges [bar] 0.03 - 0.12 0.08 - 0.32 0.2 - 0.8

Pressure Control Valves Pressure Reducing Valves DM 765 www.mankenberg.de | Tel. +49 (0) 451 - 8 79 75 0 Millibar Control Valve Materials Temperature Body, Spring Cap, Internals, Screws Spring Valve Seal Diaphragm Dimensions [mm] size 80 °C CrNiMo-steel 130 °C CrNiMo-steel CrNi-steel FPM NBR Dimensional Drawing CrNi-steel FPM EPDM optional FPM nominal diameter G 1/2 140 ~20 ~130 138 A B C D Weights [kg] Page No. DM 765/2.1.123.2 - Standing 18.09.2012 MANKENBERG GmbH | Spenglerstraße 99 | D-23556 Lübeck 1.5 Special designs on request. The pressure has always been indicated as overpressure....