guth VS Series User manual

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Operating manual
VS Valves
- Shut-off Valves
- Change-over Valves
- Double-seal Valves
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Engineered Processing Units

Table of Contents
1. General Safety Instructions 3
2. Armature Structure 4
2.1 Variants and Switch Settings 4
2.2 VS Valve Components 5
2.3 Standard Dimensions 5
3. Mounting Instructions 6
3.1 Dismantling and Mounting 6
3.1.1 Dismantling 6
3.1.2 Mounting 8
3.2 Dismounting and Mounting the Leak Valves 11
4. Commissioning 12
4.1 Prior to Installation 12
4.2 Installation of the Armature 13
5. Service Recommendations / Repair 15
5.1 General Instructions 15
5.2 Service Intervals 15
6. Technical Information 16
6.1 Technical Data 16
6.2 Appendix
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1. General Safety Instructions
This operating manual is supplied for information purposes only and is subject to change without notice.
The following symbols are used in this manual:
Caution! indicates that particular handling methods must be followed to avoid personal injury.
Warning! this warning symbol indicates that certain procedures must be followed to avoid damage to
the value.
Instruction! indicates important information, which can facilitate work on the value or
the plant.
It is imperative that responsible operating and installation personnel read and comply with this manual prior to installation
of the value, or prior to commissioning the plant.
- Trained and competent personnel must perform all assembly and maintenance work.
- The technical data of the valves, and their application limits, must be strictly observed.
- Manufacturer assumes no liability for damages and downtime due to non-compliance with the instructions in this manual.
- The illustrations and information in this manual are subject to technical change without notice
The customer is obligated to only operate the device in a problem-free condition.
In addition to the instructions in this documentation, the following also apply:
- applicable accident protection guidelines, including those locally prescribed
- generally accepted safety-related regulations
- national guidelines of the country where the product is used
- company-internal work and safety guidelines
Caution:
The product line must be depressurised and free of product before performing maintenance and repair work.
All product residue and cleaning agents must be drained. The value should not be serviced or dismantled
when it is hot.
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2.1 Versions and Switch Settings
The VS valve series products are categorised in the following basic versions:
2. Value Descriptions
Shut-off Valves (Fig. 1) Change-over Valves (Fig. 2) Double-seal Valves (Fig. 3)
Valve closed Valve open
Valve closed Valve open
Valve closed Valve open
Shut-off valves are available ‘L’, ‘T’ and inline
versions with pneumatic actuators to suite
the value size.
The valves are normally supplied as a fail
closed (spring to close), however by rotating
the actuator the can be changed to fail to
open.
Shut-off valves are also manufactured in
double seal and double seat versions with
leakage chambers draining to atmosphere.
Change-over valves are available in a one-part
welded body or two-part body clamped version.
The bodies of the two-part clamped version
can be rotated to suit any piping configuration
whereas the one piece body is either in-line
90° to one another.
The actuators can be fitted in the fail closed
or fail open position.
Double seal valves are supplied with a one-
piece welded body with leakage valves for
draining the leakage chamber thus ensuring
that the valve chambers are mixproof.
In addition to the standard actuator these
valves can be fitted with a seat lifting actuator
to individually lift the seat seals for cleaning
during line CIP.
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All versions use the same sealing principle and are supplied with the standard pneumatic actuators type DRM 102 and
DRM 133 depending on the valve size.
As an option the valves can be equipped for process control by fitting a control head containing a solenoid valve, to
control the air supply to the actuator and two proximity switches to indicate valve position. An Asi Bus control head
is also available.
The valves are normally supplied with butt weld ends suitable for use with thin wall dairy tube and DIN standard tube.
Couplings and flanges to various hygenic standards are also available on request.
2.2 VS Valve Components
Table 1: Components
A Drive
B Valve spindle
C Lantern
D Housing
E Leak valves
F Control head (optional)
G Connecting clamp
H Housing end piece
I O-ring (lantern)
J Seat seal
K Spindle seal
L Housing seal
M Profile seal (leak valves)
2.3 Standard Dimensions
The RD (removal dimension) measurement is the space required to
remove the valve, as shown in Fig. 19, page 12.
Valve insert:
Consists of components A, B,
C, and the seals of spindle and
lantern (I, J, K, L)
Illustration:
Double-seal valve, double balanced with
seat lifting actuator and control head
Table 2: Dimension
table - shut-off valves /
changeover valves
Table 3: Dimension table –
double-seal valves
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3. Maintenance Instructions
Competent personnel must perform all necessary maintenance work. GUTH assumes no liability for injury or component
damages as a result to improper handling.
3.1 Dismantling and mounting
The air supply and electrical connections must be removed before any maintenance work is carried out on
the valves. The product lines should be drained and rinsed to avoid injury.
The actuator of the VS valves contains pre-tensioned springs and the maintenance of these actuators is not
covered in this manual. To avoid injury these spring cartriges should not be dismantled.
Valve maintenance tools:
1. Flat Spanner for lower balancer 5. Allen wrenches SW4, SW5, and SW6
2. Special spanner for lower part of spindle 6. Grease lubricant
3. Flat spanners 13 and 17
4. Circlip pliers for shaft circlip
3.1.1 Dismantling
1. Remove the M8 hexagon cap screws from the upper housing clamp (pos 3) remove the clamp and lift the valve insert
out of the housing.
2. Remove the 4 M8 hexagon set screws (pos 2) between the actuator and the lantern
3. Remove circlip (pos 1) from the spindle protruding through the actuator.
Shut-off valve Change-over valve Double-seal valve
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Depending on the valve type the circlip in the valve spindle tension from the actuator. In order to remove
or replace this circlip apply continuous air pressure to the actuator to lift the valve spindle clear of the actuator.
The circlip can now be removed or replaced, and the air pressure removed from the actuator. Care should
be taken during this operation to avoid injury to the hands.
4. Pull spindle with lantern out of the actuator.
5. Pull lantern (pos. 4) up off of the spindle.
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3. Maintenance Instructions
Shut-off valve Change-over valve Double-seal valve
Shut-off valve Change-over valve Double-seal valve
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3. Maintenance Instructions
Lever out seal
Fig. 6
Do not damage the surface
Fig. 7
Do not damage the surface
Drift
Fig. 8
Shut-off valve Change-over valve Double-seal valve
Retain in this position Retain in this position
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6. Use the Guth special spanner and flat spanner size 17 to dismantle the spindle (counter-clockwise). Now the seat seal
(pos 7 can be replaced.
Position 5 and 9 are the spanner positions for dismantling the valve spindle.
7. Remove shaft and housing seal
Housing seals are installed on each lantern, as well as on each housing interface. The removal procedure is illustrated
here with the lantern in Fig. 6 used as an example. The shape of the lantern varies according to the valve type (dismantling
procedures however stay the same)
Do not damage the lantern when removing the bush. If in doubt contact the
Technical Department at Guth South Africa.
Housing seals as well as the shaft seal can be inserted and removed by hand without tools (fig. 6) If the valve type has a
rising spindle then an ‘O’ ring is installed below the flanged bush in this doubled sealed version. This bush can be removed
with a tool such as a screwdriver. The flanged bush is maintenance free and should only be replaced if there is visible
damage (scoring) Proceed as follows to replace the bush.
8. Dismantle flanged bushing
After all seals have been removed, then pull out the flanged bushing with an extractor, or push it out with a suitable bolt.
Alternatively the bushing can also be spindled out

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