DM-7620 pages

DM 762

Pressure Control Valves
Pressure reducer for liquids and gases up to 130 °C
Technical Data
Connection

G 1/2 - 2
DN 15 - 50
Nominal Pressure Inlet PN 16
Outlet PN 1
up to 16 bar
Inlet Pressure
Outlet Pressure
0.002 - 0.52 bar in 16 setting ranges
Kvs-value
0.2 - 3.6 m3/h
Tightness
acc. VDI/VDE-guideline 2174
(leakage rate K 0.05 % of Kvs-values)

body with
valve
diaphragm
housing

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 762 pressure reducing valve is a diaphragm-controlled
spring-loaded proportional control valve for very small outlet
pressures and large volumes.
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 cover, spring, setting
spindle, 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 setting
spindle, 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 setting spindle clockwise increases
the outlet pressure.
The DM 762 pressure reducer requires a pilot line (to be installed on-site).
We recommend that G 1 and G 1½ or DN 25 and DN 40 connections be used.

spring module

setting screw

Kvs-values [m3/h] for all body sizes
0.2

0.9

1.5

2.2

2.8

3.6

STANDARD EQUIPMENT

Setting Ranges [bar] diaphragm diameter 500 mm

OPTIONS

Setting Ranges [bar] diaphragm diameter 360 mm

Sheet no. DM 762/2.1.041.1 - issue 26.04.2004

• All stainless steel construction
• Pilot line connection
•
•
•
•

Pressure gauge connection
Oil and grease-free version for oxygen
Clean gas version with special connections
For toxic or hazardous media: sealed spring cover complete
with leakage line connection (incl. sealed setting spindle).
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.
We reserve the right to alter technical specifications without notice.

0.002 - 0.003

0.004 - 0.006

0.003 - 0.015

0.005 - 0.032

0.008 - 0.03

0.015 - 0.06

0.012 - 0.07

0.025 - 0.14

Setting Ranges [bar] diaphragm diameter 270 mm
0.008 - 0.016

0.015 - 0.065

0.02 - 0.12

0.05 - 0.28

Detting Ranges [bar] diaphragm diameter 220 mm
0.015 - 0.030

0.025 - 0.125

0.05 - 0.22

0.1 - 0.52

Permissible Reduction Ratio (max. p1/p2)
diaphragm
diameter
500
360
270
220

Kvs-value [m3/h]
0.2
0.9
1.5
15000 7500 4500
8000 4000 2500
4000 2000 1250
2200 1100
660

2.2
2200
1200
600
320

2.8
1500
800
400
210

3.6
1100
650
320
170

Pressure Tech 2000 Limited • Unit 6, Graphite Way, Hadfield, Glossop, Derbyshire SK13 1QG - GB • Tel. +44-1457-899307 • Fax +44-1457-899308