Pressure Reducing Valves DM 4620 pages

Pressure Control Valves
Pressure Reducing Valves DM 462
Page No. DM 462/2.1.123.1 - Standing 18.09.2012
MANKENBERG GmbH | Spenglerstraße 99 | D-23556 Lübeck
www.mankenberg.de | Tel. +49 (0) 451 - 8 79 75 0
Valve for Hygiene Applications | Ultrapure Media
 Technical Data
Connection DN
Nominal Pressure PN
Outlet Pressure
Inlet Pressure
Kvs-Value
Temperature
Medium
25 - 80
2.5 - 10
0.3 - 5 bar
up to 8 bar
4 - 70 m3/h
180 °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 462 pressure reducing valve is a twin seat
diaphragm-controlled spring-loaded proportional control valve which is
primarily used for hygienic applications in the food processing and
pharmaceutical industries. A PTFE protective foil renders the diaphragm
physiologically safe and steamproof up to 180 °C. The valve does not
require an external pilot line.
This valve is manufactured from deep-drawn stainless steel featuring
excellent corrosion resistance. It contains virtually no dead pockets and is
suitable for use in CIP and SIP systems. The angled design allows
complete draining.
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
0.5 percent of the constant volume flow is permitted for the valve in
closed position..
 Standard
»
»
»
»
all stainless steel construction
clamping flanges DIN 32676
non rising adjusting screw
quick-release body clamp ring
 Options
» polished version for food, pharmaceutical and superclean applications,
surface roughness: Ra ≤ 0.25/ ≤ 0.4/ ≤ 0.8 µm
» diaphragm protection by PTFE foil
» 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 DIN flanges, 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 DN
25
40
4
22
50
22
65
60
Setting Ranges [bar] and Nominal Pressure PN
nominal diameter DN
40 - 80
25 - 80
0.3 - 1.1
0.8 - 2.5
PN 10/2.5
PN 10/6
80
70
25 - 80
2-5
PN 10/10