Pressure Reducing Valves DM 502
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Pressure Control Valves Pressure Reducing Valves DM 502 www.mankenberg.de | Tel. +49 (0) 451 - 8 79 75 0 Standard Valve Technical Data Connection G Nominal Pressure PN Inlet Pressure Outlet Pressure Kvs-Value Temperature Medium 1/2 - 2 100 up to 100 bar 0.02 - 16 bar 0.6 - 4.2 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. MANKENBERG GmbH | Spenglerstraße 99 | D-23556 Lübeck The DM 502 pressure reducing valve is a diaphragm-controlled spring-loaded proportional control valve specially designed for CO2. This pressure reducer is manufactured from deep-drawn stainless steel featuring excellent corrosion resistance. The valve cone is fitted with a soft seal. 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. Changing the control pressure setting does not affect the height of the valve (non rising adjusting screw). 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. A sense line is required for outlet pressures ≤ 1.1 bar (to be installed on-site). 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. Page No. DM 502/2.1.123.1 - Standing 18.09.2012 Standard » » » » body and spring cap made of stainless steel non rising adjusting screw quick-release body clamp ring sense line connection (only for outlet pressures ≤ 1,1 bar) Options » » » » pressure gauge connection pneumatic actuation drain hole provided at bottom of spring cover for draining condensate 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] nominal diameter G 1/2 3/4 1 1 1/4 1 1/2 2 m3/h 0.6 0.9 1.5 2.8 3.6 4.2 1 - 2.5 2-5 4-8 6 - 12 10 - 16 1 1/4 1 1/2 2 280 230 185 75 60 50 35 25 20 20 15 10 10 8 6 7 5 4 Setting Ranges [bar] 0.02-0.1 0.1-0.5 0.3-1.1 2 Permissible Reduction Ratio (max. p1/p2) nom. diameterG 1/2 3/4 1 setting range 0.02 - 0.12 bar ratio p1/p2 810 750 530 setting range 0.1 - 0.5 bar ratio p1/p2 220 200 140 setting range 0.3 - 1.1 bar ratio p1/p2 100 90 65 setting range 1 - 2.5 bar ratio p1/p2 55 50 35 setting range 2 - 5, 4 - 8 and 6 - 12 bar ratio p1/p2 25 25 15 setting range 10 - 16 bar ratio p1/p2 20 15 13

Pressure Control Valves Pressure Reducing Valves DM 502 Page No. DM 502/2.1.123.2 - Standing 18.09.2012 MANKENBERG GmbH | Spenglerstraße 99 | D-23556 Lübeck www.mankenberg.de | Tel. +49 (0) 451 - 8 79 75 0 Standard Valve Materials Temperature Body, Spring Cap Internals Spring Valve Seal Diaphragm Protection Foil for Diaphragm 80 °C CrNiMo-steel brass, Cr-steel CrNi-steel EU 130 °C CrNiMo-steel brass, Cr-steel CrNi-steel FPM optional EPDM orPTFE FPM optional EPDM PTFE (option) CR PTFE (option) Dimensions [mm] setting size nominal diameter G range bar 1/2 3/4 all ranges A 85 95 B 37 48 0.02 -...