SOMAS SKV Betriebsanleitung

Mi-706 EN

Service and operating instruction

Ball valves

Type SKV/SKVT

Edition: 2020-10

Nominal pressure Nominal size NPS

Type SKV PN 40 Class 300 DN 25 - 50 1 - 2

Type SKV PN 25 Class 150 DN 80 - 400 3 - 16

Type SKVT PN 25 Class 150 DN 450 - 500 18 - 20

Material Stainless steel, Flanged design

Edition: 2020-10 Original document - Mi-706 EN

Introduction

This operating manual is intended for the operating, maintenance and

supervisory personnel.

This operating manual also describes components, equipment and ancillary units

which are not or only partially included in the scope of supply.

The operating personnel must have read, understood and must comply with this

operating manual.

We keep the right to do any technical changes which are necessary to improve the

product without prior notice.

reproduced, stored in a retrieval system, or transmitted in any form or by any

means, graphic, electronic, mechanical, photocopying, recording, taping, or

otherwise without the prior permission of the copyright owner.

Valve supplier

SOMAS Instrument AB

Norrlandsvägen 26-28

SE-661 40 SÄFFLE

SWEDEN

Phone: +46 (0)533 167 00

E-mail: sales@somas.se

Website: www.somas.se

Original document - Mi-706 EN Edition: 2020-10

Table of contents

1 Preliminary remarks 6

1.1 Explanation of warnings, symbols and signs 6

1.1.1 Warnings 6

1.1.2 Symbols and signs 7

2 Safety 8

2.1 Safety instructions 8

2.1.1 General dangers 8

2.1.2 Hazards due to electrical equipment 8

2.1.3 Additional hazards 8

2.1.4 State of the art 9

2.1.5 Preconditions for using the valve 9

2.2 Designated use of the valve 9

2.2.1 Use 9

2.2.2 Liability for non-designated use 10

2.3 Organizational measures 10

2.3.1 Availability of operating manual 10

2.3.2 Additional regulations 10

2.3.3 Checks 10

2.3.4 Protective equipment 10

2.3.5 Rebuilds or modifications at the valve 10

2.3.6 Replacing damaged parts 10

2.4 Selection and qualification of personnel 10

2.5 Safety instructions for ball valves 11

3 Description 13

3.1 General information 13

3.2 Function and design 13

Edition: 2020-10 Original document - Mi-706 EN

4 Technical specifications 14

4.1 Tightening torque for bolts 14

4.1.1 Torques for flange boltings 14

4.1.2 Tightening torque for screws in valves 15

4.1.3 Tightening torque for stuffing box gland 15

4.1.4 Tightening torque for bearing blocks 15

5 Assembly 16

5.1 Unpacking and transportation 16

5.2 Installation of the valve in the pipeline 17

5.2.1 Important information for installation 17

5.3 Commissioning 18

5.4 Disassembly of the pneumatic actuator 18

5.5 Positioning of the shaft with disassembled actuator 20

5.6 Assembly of the pneumatic actuator 20

5.6.1 Actuator mounting alternatives 21

6 Maintenance 24

6.1 Disassembling the ball valve from pipeline 24

6.2 Maintenance 25

6.3 Installation and disassembly of the stuffing box 26

6.5 Replacing the seats and ball 28

6.5.1 Disassembly, DN 25–50 valves 28

6.5.2 Cleaning, lubricating and mounting 28

6.5.3 Disassembly, DN 80-400 valves 29

6.5.4 Cleaning, lubricating and mounting 30

6.5.5 Disassembly, DN 450-500 valves 31

6.5.6 Cleaning, lubricating and mounting 32

6.6 Replacing the shaft 33

Original document - Mi-706 EN Edition: 2020-10

6.6.1 Disassembly, DN 25–50 valves 34

6.6.2 Cleaning, lubricating and mounting 34

6.6.3 Disassembly, DN 80–400 valves 35

6.6.4 Cleaning, lubricating and mounting 35

6.6.5 Disassembly, DN 450–500 valves 36

6.6.6 Cleaning, lubricating and mounting 36

6.7 Adjustment of the end positions 37

6.7.1 Setting of the “closed” position with type SKV 37

6.7.2 Setting of the “open” position with type SKV 38

6.8 Leak test of the valve 39

6.9 Components 40

6.9.1 SKV, DN 25-50 40

6.9.2 SKV, DN 80-400 41

6.9.3 SKVT, DN 450-500 42

6.10 Alternative seat design 43

6.10.1 Locked seats 43

6.10.2 Scraping seats 43

Edition: 2020-10 Original document - Mi-706 EN

1 Preliminary remarks

To enable you to find information quickly and reliably in the operation manual,

this chapter familiarises you with the structure of the operating manual.

This manual uses symbols and special characters which make it easier for you to

find information. Please read the explanations of the symbols given in the section

below.

Ensure that you read all the safety instructions in this operating manual very

carefully.

You will find safety instructions in section 2, in the foreword to the sections and

before any working instructions.

1.1 Explanation of warnings, symbols and signs

1.1.1 Warnings

Warnings are used in this operating manual to warn against injury and material

damage. Always read and observe these warnings! Warnings are identified by the

following symbols:

In this manual are used diverse types of safety and warning notices:

Danger!

International

Safety symbol

Type of danger.

Advise for imminent danger. Not attention of the advices could be mortal or cause severe

injuries as a consequence.

Explanation of the countermeasures.

Warning!

International

Safety symbol

Type of danger.

Advise for imminent danger. Not attention of the advices could cause severe injuries or property

damage as a consequence.

Explanation of the countermeasures.

Attention!

International

Safety symbol

Type of danger.

Advise for possible danger. Not attention of the advices could cause property damage as a

consequence.

Explanation of the countermeasures.

Original document - Mi-706 EN Edition: 2020-10

Note

Advices and give tips for better understanding of the manual or a better handling of the valve.

1.1.2 Symbols and signs

Symbols and signs are used in this operating manual to provide fast access to

information.

1.1.2.1 Symbols and signs in the text

Symbol Denotation Explanation

Operating instructions This means there is an action to be carried out.

Operating instructions,

multi-step

Work instructions must be carried out in the

sequence shown.

Deviations from the sequence shown may result in

damages to the valves and accidents.

•

–

Lists, two-stage No activities are linked with lists.

➔Cross-reference References to images, tables, other sections or other

instructions.

Tab.1-1 Symbols in the text

Edition: 2020-10 Original document - Mi-706 EN

2 Safety

2.1 Safety instructions

2.1.1 General dangers

Sources of danger resulting in general hazards:

• Mechanical hazards

• Electrical hazards

2.1.2 Hazards due to electrical equipment

Due to the permanent dampness, electrically-operated machine parts represent a

potential source of danger.

Comply with all regulations on electrical equipment in damp areas!

2.1.3 Additional hazards

2.1.3.1 Entanglement, crushing and cut/sever hazards

• by moving machine parts left exposed, by removing covers for inspection,

sampling, etc.

• by automatic operated valves

2.1.3.2 Burning or scalding hazards

• by opening or leaving open function-check and/or sampling openings on

systems operating at high temperatures (above 40°C)

• by operating temperature >= 70°C. Short contacts (approx. 1s) of the skin with

the surface of the valve may cause burns (pr EN 563).

• by operating temperature = 65°C. Longer contacts (approx. 3s) of the skin with

the surface of the valve may cause burns (pr EN 563)

• by operating temperature 55°C…65°C. Longer contacts (approx. 10 ... 3s) of the

skin with the surface of the valve may cause burns (pr EN 563)

2.1.3.3 Explosion hazards

A high surface temperature on a valve and actuator, constitutes (a risk for burn

injuries, and) a risk of ignition of explosive atmospheres in ATEX applications.

The surface temperature of the equipment is not dependent on the equipment

itself, but on the ambient conditions and the process conditions. The protection

from the surface temperature is the responsibility of the end user, and must be

effectuated before the equipment is put into service.

Original document - Mi-706 EN Edition: 2020-10

2.1.4 State of the art

This product has been built by SOMAS Instrument AB in accordance with state-

of-the-art standards and the recognized safety rules. Nevertheless, its use may

constitute a risk to life and limb of the user or of third parties, or cause damage to

the valve and to other material property, if:

• the product is not used as designated

• the product is operated or repaired by untrained personnel

• the product is modified or converted improperly and/or

• the safety instructions are not observed.

Therefore, every person involved in erecting, operating, inspecting, maintaining,

servicing and repairing the valve must read, understand and observe the complete

operating instructions, particularly the safety instructions.

2.1.5 Preconditions for using the valve

The valve only has to be used:

• in perfect technical condition

• as designated

• according to the instructions in the operating manual, and only by safety-

conscious persons who are fully aware of the risks involved in operating the

valve

• if all protective devices are installed and operative

Rectify immediately any functional disorders, especially those affecting the safety

of the valve!

2.2 Designated use of the valve

2.2.1 Use

The valves are appropriate to be used in pulp and paper industry, chemical

industry, shipbuilding industry, energy industry and offshore industry.

Particular data to the operation and limit values are specified on the data sheet

“Si-706EN”.

The operating values, limit values and setting data must not deviate from the

values specified in the operating manual and correspondig information sheet

without consulting the manufacturer! The manufacturer cannot be held liable for

any damages resulting from non-observance of the operating manual.

Edition: 2020-10 Original document - Mi-706 EN

2.2.2 Liability for non-designated use

Using the valve for other purposes than those mentioned previously is considered

contrary to its designated use. For resulting damages of this, SOMAS Instrument

AB is not liable! The user take the risk.

2.3 Organizational measures

2.3.1 Availability of operating manual

The operating manual has to be stored and be readily available!

2.3.2 Additional regulations

In addition to the operating manual, it have to be observed all other generally

applicable legal and other mandatory regulations relevant to accident prevention

and environmental protection! Direct the personnel to comply with them!

2.3.3 Checks

Periodically check that the personnel carry out the work in compliance with the

operating manual and that they pay attention to risks and safety factors.

2.3.4 Protective equipment

Use when necessary protective equipment.

2.3.5 Rebuilds or modifications at the valve

Do not make any rebuilds or modifications at the valve yourself, which can affect

the security of the valve.

2.3.6 Replacing damaged parts

Valve parts that are not in perfect condition must be replaced immediately

with original spare parts! Use only original spare and wear parts from SOMAS

Instrument AB.

On unauthorized parts is not guarantee that they have been designed and

manufactured according to the application.

2.4 Selection and qualification of personnel

Operation, maintenance and repairing works require special knowledge and

may only be carried out by trained technical specialists or qualified personnel

authorized by the user.

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