18.4.17
Modulating Valves Type: VSR
2. Technical Data
6
2 . 3
Variants
For each of the main elements from a) to d) there are several variants available. The design is mod-
ular and they are generally mutually compatible. Exceptions to this are to be found in the steam
modulating valve, pressure reducing valve (high pressure) and aseptic diaphragm modulating valve
series on account of the valve characteristics.
2 . 4
Housing variants
A housing consists of a spherical basic body made of forged stainless steel and one or two con-
necting pieces with connector types according to customer requirements. On the front end of the
housings with connecting pieces the lantern can be attached, or further housing modules (with seat
ring), a blind connection or a second spindle guide. Several housing units can be coupled together
to fabricate valves with inlets and outlets on different levels with double-seat inner fittings or with
multistage control cones for reducing large pressure differences. The control cones are supplied
with a metal seal seat as standard. In special cases, however, a version with an elastomer seal can
be supplied. For special requirements, the cone and seat ring can be supplied as hardened com-
ponents.
2 . 5
Lantern variants
The connection between the valve housing and the actuator is provided by the lantern b). This
serves both to guide and to seal the spindle. Here, the seal against the product space is provided
by a separate intermediate module for the upper end of the housing. The spindle is guided through
a bushing with little clearance. Where particularly high standards of hygiene must be maintained,
the chamber between the O-rings has connections for alcohol or steam. Where required on account
of difficult operating conditions, other sealing elements such as a plug socket can be installed as
well. Also, a special aseptic diaphragm and vacuum seal with Teflon-EPDM sealing elements is
available as a special module.
2 . 6
Actuator variants
Diaphragm actuator:
Tab. 1 Diaphragm actuators
Linear thrust actuators:
Tab. 2 Linear thrust actuators
2 . 7
Controller variants
Standard positioners:
As standard, the Guth DigiPos valve positioner is mounted on the diaphragm actuator.
Controller options:
Optionally, valve positioner according to NAMUR can be mounted.
Designation:
M02
M1
M2
M3
M4
M9
M10
Travel (mm)
20
20
20
30
30
60
60
No. of springs
6
3
6
3
6
6
12
Setting pressure (bar)
0,8-4,0
0,8-1,5
1,5-3,0
0,7-1,5
1,5-3,0
0,7-1,5
1,4-3,0
Max. Setting pressure (bar)
6
6
6
6
6
6
6
Spring pre-tensioning (KN)
0,72
1,5
3,1
2,1
4,2
5,0
10,0
Closing force (KN),
air-to-close at air
pressure
4,5 bar
3,5
9,5
4,7
7,5
3,5
10,3
20,6
6,0 bar
5,4
14,3
9,5
12,2
5,3
20,5
30,8
Designation:
H1
H2
Travel (mm)
25
25
No. of springs
1
1
Max. Setting pressure (bar)
5
5
Spring pre-tensioning (KN)
1,9
3,4
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