DM-6620 pages

DM 662

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

G 1/2 - 1
DN 15 - 25
PN 100
Nominal Pressure Inlet
Outlet
PN 1 - 16
up to 100 bar
Inlet Pressure
Outlet Pressure
0.02 - 12 bar in 7 setting ranges
Kvs-value
3.2 - 3.6 m3/h
Tightness
acc. VDI/VDE-guideline 2174
(leakage rate K 0.05 % of Kvs-value)

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 662 pressure reducing valve is a diaphragm-controlled
spring-loaded and balanced proportional control valve for
universal application and medium 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.
For outlet pressures K 1.1 the DM 662 pressure reducer requires
a pilot line (to be installed on-site).

STANDARD EQUIPMENT

Sheet no. DM 662/2.1.041.1 - issue 26.04.2004

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•
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All stainless steel construction
Non-rising setting spindle
Quick-release body clamp ring
Pilot line connection (only for outlet pressures K 1.1 bar)

OPTIONS

• Pressure gauge connection
• 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

body with
valve

spring module

setting screw
(non encreasing)

Kvs-values [m3/h]
nominal diameter
Kvs-value

DN

15

20

25

G

1/2

3/4

1

m3/h

3.2

3.5

3.6

Setting Ranges [bar], Nominal Pressure [PN]
setting range

6 - 12

4-8

2-5

0.8 - 2.5

nominal pressure

100/16

100/16

100/10

100/6

Setting Ranges [bar], Nominal Pressure [PN]
setting range

Operating instructions, Know How and Safety instructions must be
observed.

0.3 - 1.1

0.1 - 0.5

0.02 - 0.12

nominal pressure

100/2.5

100/1

100/1

We reserve the right to alter technical specifications without notice.

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