Guth VS Series Manuale utente

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Operating manual

VS Valves

- Shut-off Valves

- Change-over Valves

- Double-seal Valves

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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

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

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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

Johonnesburg:

79 St Georges Street, Newlands

PO Box 58070, Newville, 2114

Phone: + 27 (0)11 477-4923

Fax: + 27 (0)11 477-8062

e-mail: [email protected]

Cape Town:

2 Platinum Rd, Marconi Industria, Montague Gardens

PO Box 1486, Milnerton, 7435

Phone: + 27 (0)21 555-8300

Fax: + 27 (0)21 552-2228

e-mail: [email protected]

Port Elizabeth:

Unit 24,

Willow Road Business Park, 33 Willow Road, Fairview

PO Box 70496, The Bridge PO, Port Elizabeth, 6032

Phone: + 27 (0)41 367 2431

Fax: + 27 (0)41 367 5152

email: [email protected]

Pinetown:

Unit 3 Pastel Park, 50

Wareing Road

PO Box 8, Pinetown, 3600

Phone: + 27 (0)31 709-5444

Fax: + 27 (0)31 709-8333

e-mail: [email protected]

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