Pressure Reducing Valves DM 505
2Pages

Pressure Control Valves Pressure Reducing Valves DM 505 MANKENBERG GmbH | Spenglerstraße 99 | D-23556 Lübeck www.mankenberg.de | Tel. +49 (0) 451 - 8 79 75 0 Valve for Small Flow Rates Technical Data Connection DN Connection G Nominal Pressure PN Inlet Pressure Outlet Pressure Kvs-Value Temperature Medium 15 - 25 1/2 250 up to 250 bar 0.005 - 20 bar 0.2 - 0.90 m3/h 130 °C liquids, gases and steam 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 505 pressure reducing valve is a diaphragm-controlled spring-loaded proportional control valve for small volumes. This pressure reducer is manufactured from deep-drawn stainless steel featuring excellent corrosion resistance. The tubular inlet spigot of the valve body accommodates the seat aperture. The soft-sealing valve cone is guided in the seat assembly and connected with the control diaphragm by means of a stirrup which surrounds the seat assembly. 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). Outlet pressures ≤ 1.1 bar DM 505 requires a sense line (to be installed on-site). 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. Page No. DM 505/2.1.124.1 - Standing 18.09.2012 Standard » » » » all stainless steel construction non rising adjusting screw quick-release body clamp ring sense line connection (for DM 505 with outlet pressures ≤ 1,1 bar) Options » pressure gauge connection » pneumatic actuation » 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, please select 0.2 Setting Ranges [bar] DM 505 0.005-0.025 0.02-0.12 0.1-0.5 0.2-1.1 0.8-2.5 Permissible Reduction Ratio (max. p1/p2) setting range bar Kvs-value 0.2 0.5 0.005 - 0.12 1485 1000 0.1 - 0.5 405 280 0.2 - 1.1 185 125 0.8 - 2.5 105 70 1 - 20 39 27 0.5 1-5 0.9 4-12 0.9 750 210 100 50 20 10-20

Pressure Control Valves Pressure Reducing Valves DM 505 Valve for Small Flow Rates Special designs on request. The pressure has always been indicated as overpressure. Mankenberg reserves the right to alter or improve the designs or specifications of the products described herein without notice. Dimensional Drawing leakage line adjusting screw sealing sense line Recommended Installation sense line connection 10 - 20 x DN behind the valve 7 Leakage Line G 1/8 (option)