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SOMAS VSS Service And Operating Instructions

Butterfly valves, nominal pressure lugged design pn 63, 100 asme class 600, nominal size dn 80 - 600 material stainless steel
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Service and operating instruction
Butterfly valves
Type VSS
Nominal pressure
Nominal size
Material
Lugged design
PN 63, 100
ASME Class 600
DN 80 - 600
Stainless steel
Edition: 2020-06
Mi-209 EN

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  • Page 1 Edition: 2020-06 Mi-209 EN Service and operating instruction Butterfly valves Type VSS Lugged design Nominal pressure PN 63, 100 ASME Class 600 Nominal size DN 80 - 600 Material Stainless steel...
  • Page 2 We keep the right to do any technical changes which are necessary to improve the product without prior notice. Copyright Copyright by SOMAS Instrument AB. No part of this publication may be 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.

  • Page 3: Table Of Contents

    Original document - Mi-209 EN Edition: 2020-06 Table of contents Preliminary remarks Explanation of warnings, symbols and signs 1.1.1 Warnings 1.1.2 Symbols and signs Safety Safety instructions 2.1.1 General dangers 2.1.2 Hazards due to electrical equipment 2.1.3 Additional hazards 2.1.4 State of the art 2.1.5 Preconditions for using the valve...
  • Page 4 Edition: 2020-06 Original document - Mi-209 EN Technical specifications Specifications 4.1.1 Gaskets Tightening toeque for bolts 4.2.1 Fastening torque valve body PN 100 4.2.2 Tightening torque for screw in valves 4.2.3 Tightening of stuffing box Assembly Unpacking and transportation Installation of the valve in the pipeline 5.2.1 Important information for installation Start up...
  • Page 5 Original document - Mi-209 EN Edition: 2020-06 Mounting of a new fixed seat Adjustment of the end positions 6.6.1 Setting of the “closed” position with type VSS 6.6.2 Setting of the “open” position with type VSS Leak test of the valve Components 6.8.1...

  • Page 6: Preliminary Remarks

    Edition: 2020-06 Original document - Mi-209 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.

  • Page 7: Symbols And Signs

    Original document - Mi-209 EN Edition: 2020-06 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.

  • Page 8: Safety

    Edition: 2020-06 Original document - Mi-209 EN 2 Safety 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.

  • Page 9: State Of The Art

    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: •...

  • Page 10: Liability For Non-Designated Use

    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.

  • Page 11: Safety Instructions For Butterfly Valves

    Original document - Mi-209 EN Edition: 2020-06 Safety instructions for butterfly valves • Operation of the butterfly valve is always subject to the local safety and accident prevention regulations. Danger! Risk of injury! Observe movements of the disc. Keep hands, tools and other objects away from the area where the disc moves when the actuator is connected to compressed air system.
  • Page 12 The butterfly valve may cause noise in the pipeline. The noise level depends on the type of application and can be determined with the SOMAS software SomSize. Additional noise sources in the vicinity of the butterfly valve may increase the noise level.
  • Page 13 Original document - Mi-209 EN Edition: 2020-06 Warning! When transporting and handling the butterfly valve, observe its weight. Never lift the valve by its positioner, limit switch, solenoid valve or piping. Place the hoisting ropes securely according to lift instruction. The butterfly valve or parts thereof may injure persons if dropped.

  • Page 14: Description

    The seat is available in different stainless qualities and is replaceable. The butterfly valve type VSS is designed as a wafer style valve. As alternative there is a lug type version available. The butterfly valve is checked and ready for use at delivery and can be equipped with actuators, valve positioners as well as with other accessories.

  • Page 15: Technical Specifications

    Original document - Mi-209 EN Edition: 2020-06 Note Use gaskets with the nominal size of the valve, to have a leak-proof sealing in both flow directions. The valve is adjustable. This means, the more the valve is closed the tighter it becomes ( Fig.3-1).
  • Page 16 Gasket dimensions according to DIN 2697 Tab.4-1 For dimensions not included in the table contact SOMAS To fit between pipe flanges acc. to Class 600, the dimensions acc. to ASME B16.21 RF are valid, whereas the following dimensions for gaskets are valid Tab.4-2).

  • Page 17: Tightening Toeque For Bolts

    PN 100 3460 Tab.4-3 For dimensions not included in the table contact Somas The information in the table refers to lubricated bolts. The correction factor for new, unlubricated bolts is 1.5. Tighten the bolts alternately until the correct tightening torque is reached.

  • Page 18: Tightening Torque For Screw In Valves

    Table 4-5 is valid for valves with a maximum differential pressure of 50 bar. Stuff. box diameters Stud bolt Minimum torque di/dy (mm) dim. (Nm) 20/35 25/40 30/45 35/50 40/55 50/65 60/75 70/90 80/100 90/110 Tab.4-5 For data not included in the tables contact SOMAS...

  • Page 19: Assembly

    Original document - Mi-209 EN Edition: 2020-06 5 Assembly Unpacking and transportation Inspect the butterfly valve for transport damage when unpacking. The protective caps must only be removed immediately before assembly. The valve must be stored on a suitable base and protected against dirt until installed. The valve must be stored in a cool, dry, clean place, not in direct contact with the floor.

  • Page 20: Installation Of The Valve In The Pipeline

    Mounting in horizontal pipes How SOMAS valves are mounted in a horizontal pipe can depend on a variety of factors like the media, the application as such and available space.
  • Page 21 Original document - Mi-209 EN Edition: 2020-06 Warning! Before carrying out maintenance or repair work on the valve with actuator as well as installation and disassembly of the butterfly valve in the pipeline, always disconnect the compressed air supply to the actuator. Single action actuators may move to “open”...

  • Page 22: Important Information For Installation

    Edition: 2020-06 Original document - Mi-209 EN 5.2.1 Important information for installation • The protective devices are to be removed directly before mounting the valve • Counterflanges must be in accordance to the European or ASME standards • Clean the whole pipeline system prior start up. Impurities damage the seat and the butterfly edge and lead to leakage •...
  • Page 23 Original document - Mi-209 EN Edition: 2020-06 To install the butterfly valve on the pressure side of a centrifugal pump, you have to position the butterfly valve shaft perpendicular to the pump shaft ( Fig.5-4). ➔ Fig.5-4 Installing the butterfly valve after a centrifugal pump 1.

  • Page 24: Start Up

    Edition: 2020-06 Original document - Mi-209 EN Fig.5-5 Flanges and gaskets 6. Tighten flange screws ( Chap. 4.2). ➔ 7. Leave the butterfly valve in closed position when the installation is finished. The butterfly valve is now ready for operation. Start up 1.

  • Page 25: Disassembly Of The Pneumatic Actuator

    Original document - Mi-209 EN Edition: 2020-06 Disassembly of the pneumatic actuator Note Observe also the detailed information in the operating manual of the actuator Mi-503EN. Warning! Before assembling or disassembling the pneumatic actuator of a butterfly valve installed in the pipeline depressurise the relevant valve in the pipeline system, isolate the valve and remove the medium before working on the valve.
  • Page 26 Edition: 2020-06 Original document - Mi-209 EN Fig.5-6 Disassembly of the actuator (schematic diagram) Use a puller to disassemble the actuator from the butterfly valve. This prevents damage to the seat and the butterfly of the valve. Pullers Actuator size Article no.

  • Page 27: Positioning Of The Shaft With Disassembled Actuator

    Original document - Mi-209 EN Edition: 2020-06 Positioning of the shaft with disassembled actuator A line at the end of the shaft, marks the position of the disc in the butterfly valve. The line must be parallel to the butterfly valve body, when the valve is closed and the key in the flow direction points to the right ( Fig.5-7).

  • Page 28: Assembly Of The Pneumatic Actuator

    Edition: 2020-06 Original document - Mi-209 EN Assembly of the pneumatic actuator Note Observe also the detailed information in the operating manual of the actuator Mi-503EN. Warning! Before assembling or disassembling the pneumatic actuator of a butterfly valve installed in the pipeline depressurise the relevant valve in the pipeline system, isolate the valve and remove the medium before working on the valve.
  • Page 29 Original document - Mi-209 EN Edition: 2020-06 End stop bolt Clamping ring End stop bolt Bracket Bolt Bolt Fig.5-9 Assembly of the actuator (schematic diagram)

  • Page 30: Actuator Mounting Alternatives

    Edition: 2020-06 Original document - Mi-209 EN 5.6.1 Actuator mounting alternatives Following mounting positions are possible Fig.5-10 Actuator mounting position Note To prevent damage, do not fit the actuator with force. 1. Make sure that the butterfly valve is closed when using double acting and closing spring loaded actuators.

  • Page 31: Maintenance

    Original document - Mi-209 EN Edition: 2020-06 6 Maintenance Disassembly of the butterfly valve from pipeline Attention! The disassembling of the butterfly valve is usually made with full installed actuator. The disassembly is made by closing spring loaded and double acting actuators with closed butterfly valve, by opening spring loaded actuators with open butterfly valve.
  • Page 32 Edition: 2020-06 Original document - Mi-209 EN Warning! Risk of injury! Do not unscrew bolts between extended bonnet and valve when valve is pressurized. Procedure 1. Seal off the pipeline section containing the butterfly valve. 2. Depressurise the seal off pipeline section. 3.

  • Page 33: Maintenance

    The most important replacement parts are contained in the SOMAS replacement part set. The gasket set contains all necessary seals and sealing rings for basic repair of the valve. The repair kit contains a seal kit as well as bearings, ball segments etc.

  • Page 34: Procedure To Evaluate A Leakage On A Butterfly Valve Installed In A Pipeline

    Edition: 2020-06 Original document - Mi-209 EN 6.2.1 Procedure to evaluate a leakage on a butterfly valve installed in a pipeline 1. Open the butterfly valve entirely, to flush out existing particles on the sealing areas. 2. Make sure that no impurities was clamped between the seat and the disc. 3.
  • Page 35 Original document - Mi-209 EN Edition: 2020-06 Warning! Before replacing the stuffing box of a butterfly valve installed in the pipeline depressurise the relevant butterfly valve in the pipeline system, isolate the butterfly valve and remove the medium before working on the butterfly valve. The pressurised medium may lead to injuries to personnel.
  • Page 36 Edition: 2020-06 Original document - Mi-209 EN Installation and disassembly When using PTFE stuffing boxes, the actuator is always to be disassembled Chap. 5.4). ➔ When using graphite stuffing boxes, the actuator can remain installed. In this case you can install the graphite rings by cutting through them at an angle and then carefully pushing them over the shaft ( Fig.6-3/5).

  • Page 37: Replacing The Seat (Standard Metal Seat)

    Original document - Mi-209 EN Edition: 2020-06 Replacing the seat (standard metal seat) To replace the seat, the complete valve assembly is dismounted from the pipeline Chap. 6.1) and the actuator is dismounted from the valve ( Chap. 5.4). ➔ ➔...

  • Page 38: Disassembly

    Edition: 2020-06 Original document - Mi-209 EN 6.4.1 Disassembly Note The replacement of the seat should be made with installed actuator. Attention! The seat disassembly is made by closing spring loaded and double acting actuators with closed valve, by opening spring loaded actuators with open valve. Procedure 1.

  • Page 39: Mounting Of A New Fixed Seat

    Original document - Mi-209 EN Edition: 2020-06 Mounting of a new fixed seat Procedure Fixed seat is used for backwards flow direction. 1. The actuator should be mounted to the valve ( Fig.6-5/1). ➔ 2. Clean the seat area, disc edge and coverplate. 3.
  • Page 40 Edition: 2020-06 Original document - Mi-209 EN Seat position Lubrication Molycote P37 or similar Adjustment screw for close position 12 o´clock 9 o´clock 3 o´clock 6 o´clock Fig.6-5/1 Fig.6-5/2 3 o´clock After final adjustment, the 3 o´clock ”A” measure should be about Measure and record 0,5 mm smaller than previous the measured distance ”A”...

  • Page 41: Adjustment Of The End Positions

    Original document - Mi-209 EN Edition: 2020-06 Adjustment of the end positions Danger! Risk of injury! Observe movements of the disc. Keep hands, tools and other objects away from the area where the disc moves when the actuator is connected to compressed air system. Single action actuators may move to “open” or “closed”...

  • Page 42: Setting Of The "Closed" Position With Type Vss

    Edition: 2020-06 Original document - Mi-209 EN 6.6.1 Setting of the “closed” position with type VSS 1. Connect compressed air via a pressure reduction valve. Adjust the pressure to 3 bar. 2. Operate the valve to est. Leave it in the closed position.

  • Page 43: Setting Of The "Open" Position With Type Vss

    Original document - Mi-209 EN Edition: 2020-06 6.6.2 Setting of the “open” position with type VSS 1. Connect compressed air via a pressure reducing valve 4-5,5 bar depending on actuator specification. 2. Operate the valve to test. 3. Check if the valve opens to the desired position.

  • Page 44: Leak Test Of The Valve

    Edition: 2020-06 Original document - Mi-209 EN Leak test of the valve Each valve should be tested for leakage after maintenance work on the seat. Danger! Risk of injury! Observe movements of the disc. Keep hands, tools and other objects away from the area where the disc moves when the actuator is connected to compressed air system.
  • Page 45 Original document - Mi-209 EN Edition: 2020-06 In case of leakage the valve must be adjusted again ( Chap. 6.7). ➔ Nominal Max differential Gaskets [mm] Force of pressure Torque size pressure total (tons) (Nm) ø inside ø outside ø outside ø...

  • Page 46: Components

    Edition: 2020-06 Original document - Mi-209 EN Components 6.8.1 VSS DN 80-600, with metal seat Fig.6-8 VSS DN 80-600, with metal seat...
  • Page 47 Original document - Mi-209 EN Edition: 2020-06 Stuffing box 15 Disc Shaft 16 Cylindrical pin Stud 10 Cover plate 17 - 11 Support ring 18 - 12 - 19 Plug Stuffing box gland 13 - Valve body 14 Seat complete Following parts are included in the sealing kit for valves with metal seat: DN 80-600: Pos.
  • Page 48 Concern and head office: SOMAS Instrument AB Norrlandsvägen 26 SE-661 40 SÄFFLE Sweden Phone: +46 (0)533 167 00 E-mail: sales@somas.se www.somas.se...

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