Pressure Reducing Valves DM 5050 pages

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