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Operation and service instruction
Butterfly valves
Type MTV/FSV
Type MTV/FSVW
Type MTVF/FSVF
Type MTVL/FSVL
Type FSVG
Nominal pressure
Nominal Size
Wafer design
Flanged design
Lugged design
Wafer design with guiding lugs
PN 10 - 25, Class 150
DN 80 - 500 MTV, MTVF
DN 100 - 500 FSVW/FSVF/FSVL/FSVG
DN 80 - 350 MTVL
Edition: 2021-04
Mi-205 EN
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Table of Contents
Related Manuals for SOMAS MTV
Summary of Contents for SOMAS MTV
- Page 1 Type MTVF/FSVF Flanged design Type MTVL/FSVL Lugged design Type FSVG Wafer design with guiding lugs Nominal pressure PN 10 - 25, Class 150 Nominal Size DN 80 - 500 MTV, MTVF DN 100 - 500 FSVW/FSVF/FSVL/FSVG DN 80 - 350 MTVL...
- 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.
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Page 3: Table Of Contents
Original document - Mi-205 EN Edition: 2021-04 Contents Introductory information 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 Designated use of the valve... - Page 4 Edition: 2021-04 Original document - Mi-205 EN Technical specifications Specifications 4.1.1 Gaskets Fastening torque for flanges 4.2.1 Fastening torque for flanges valve body 4.2.2 Fastening torque for stuffing box 4.2.3 Tightening torque for screws in valves Assembly Unpacking and transportation Installation of the valve in the pipeline 5.2.1 Important information for installation...
- Page 5 6.8.2 Setting of the ”open” position on the butterfly valve Leak test of the valve 6.10 Components 6.10.1 MTV DN 80-150, with metal seat 6.10.2 MTV DN 200-300, with metal seat 6.10.3 MTV DN 350-500, with metal seat 6.10.4 MTV DN 80-150, with PTFE seat 6.10.5...
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Page 6: Introductory Information
Edition: 2021-04 Original document - Mi-205 EN 1 Introductory information 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-205 EN Edition: 2021-04 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: 2021-04 Original document - Mi-205 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: Designated Use Of The Valve
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. -
Page 11: Organizational Measures
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 12: Safety Instructions For Butterfly Valves
Edition: 2021-04 Original document - Mi-205 EN 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 13 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 14 Edition: 2021-04 Original document - Mi-205 EN 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.
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Page 15: Description
3 Description General information The SOMAS butterfly valve is used for control shut-off and hand operation. The valve is suitable for liquids, vapours and gases in a wide temperature range. Due to the sophisticated triple-eccentric design and the special shape of the disc a solid stainless steel seat can be used. - Page 16 Edition: 2021-04 Original document - Mi-205 EN 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).
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Page 17: Technical Specifications
EN 1514-1 of the gasket should not be exceeded, see ( Tab.4-1). ➔ Max. inside dia. Outside dia. (dy) (mm) (di) (mm) PN 10 PN 16 PN 25 * DN80 only for MTV Tab.4-1 Gaskets diameter acc. to EN 1514-1... - Page 18 To fit between pipe flanges acc. to Class 150, the dimensions acc. to ASME B16.21 RF are valid, whereas the following dimensions for gaskets are valid Tab.4-2). ➔ Max. inside dia. Outside dia. (dy) (mm) (di) (mm) Class 150 * DN80 only for MTV Tab.4-2 Gaskets diameter acc. to ASME Norm...
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Page 19: Fastening Torque For Flanges Valve Body
Tab.4-3 Fastening torque for flanges valve body * DN80 only for MTV 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 20: Fastening Torque For Stuffing Box
Edition: 2021-04 Original document - Mi-205 EN 4.2.2 Recommended fastening torque for MTV/FSV stuffing box Shaft ø Stuffing box ø Tightening torque, Tightening torque, (mm) di/dy (mm) graphite stuffing box PTFE stuffing box (Nm) 80*,100,125 20/30 150,200 25/35 30/40 35/45... -
Page 21: Tightening Torque For Screws In Valves
Original document - Mi-205 EN Edition: 2021-04 4.2.3 Tightening torque for screws in valves Screw dim./class Tightening torque MV 1) 10 Nm 25 Nm 47 Nm 57 Nm 140 Nm 273 Nm 472 Nm 682 Nm 1) Mv-recommendations refer to flat burr-free surfaces lubricated with a good quality lubricant. Tab.4-5 Tightening Torque... -
Page 22: Assembly
The valve must be stored in a cool, dry, clean place, not in direct contact with the floor. The valve must always be protected against dirt during storage and assembly, see also Technical Information sheet, Ti-935 that is available at www.somas.se. Warning! When transporting and handling the valve, observe the weight of the valve or of the whole unit. -
Page 23: 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 24: Important Information For Installation
Edition: 2021-04 Original document - Mi-205 EN 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 25 Original document - Mi-205 EN Edition: 2021-04 • Check if all screws of the cover plate are tightened. Do not pull the ends of the counterflange with force to the valves, to compensate wide clearances In case of control application avoid mounting the butterfly valve direct behind or ahead of a pipe bend.
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Page 26: Start Up
Edition: 2021-04 Original document - Mi-205 EN Fig.5-6 Flanges and gaskets 4 bolts 8 bolts 12 bolts 16 bolts Fig.5-7 Tightening flange bolts Start up 1. Always start up the system only with closed butterfly valve. 2. Be sure that the system is clean before starting up. Impurities may damage the seat immediately and in addition cause a leakage of the butterfly valve. -
Page 27: Disassembly Of The Pneumatic Actuator
Original document - Mi-205 EN Edition: 2021-04 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 28: Positioning Of The Shaft With Disassembled Actuator
Edition: 2021-04 Original document - Mi-205 EN 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. 34786 34786 34786 34786 34786 34786 34787 34787... -
Page 29: Assembly Of The Pneumatic Actuator
Original document - Mi-205 EN Edition: 2021-04 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 30 Edition: 2021-04 Original document - Mi-205 EN Danger! Risk of injury! Observe movements of the valve disc. Keep hands, tools and other objects away from the area where the valve disc moves. The valve with valve disc mounted may work as a cutting tool. Do not leave any foreign objects in the valve body.
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Page 31: Actuator Mounting Alternatives
Original document - Mi-205 EN Edition: 2021-04 5.6.1 Actuator mounting alternatives Following mounting positions are possible: Fig.5-12 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 32: Maintenance
The valve or parts thereof may injure persons if dropped. Do not walk under suspended loads. Procedure MTV 1. Seal off the pipeline section containing the butterfly valve. 2. Depressurise the sealed off pipeline section. -
Page 33: Maintenance
The stuffing box must be checked regularly and re-tightened if necessary. 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. -
Page 34: Procedure To Evaluate A Leakage On A Butterfly Valve With Pneumatic
Edition: 2021-04 Original document - Mi-205 EN 6.2.1 Procedure to evaluate a leakage on a butterfly valve with pneumatic actuator 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-205 EN Edition: 2021-04 If the leakage remains futhermore, open the valve slightly: Loosen the end position bolts “closed” ( Fig.6-2/2) of the pneumatic actuator and ➔ turn this a fourth-turn anticlockwise. Test the valve. Repeat the procedure until the valve is tight.
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Page 36: Procedure To Evaluate A Leakage On A Butterfly Valve With Gear
Edition: 2021-04 Original document - Mi-205 EN 6.2.2 Procedure to evaluate a leakage on a butterfly valve with gear 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 37 Original document - Mi-205 EN Edition: 2021-04 If the leakage remains futhermore, open the valve slightly: Loosen the end position bolts “closed” ( Fig.6-3/2) of the worm gear actuator and ➔ turn this a fourth-turn anticlockwise. Test the valve. Repeat the procedure until the valve is tight.
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Page 38: Installation And Disassembly Of The Stuffing Box
Edition: 2021-04 Original document - Mi-205 EN Installation and disassembly of the stuffing box 1. Check the stuffing box after starting up and after this regularly. Retighten the nuts of the stuffing box gland if necessary ( Fig.6-4/1). ➔ The stuffing box package must be replaced if leaks can no longer be eliminated by tightening the nuts. - Page 39 Original document - Mi-205 EN Edition: 2021-04 Installation and disassembly MTV/FSV 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.6-4/5).
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Page 40: Replacing The Seat (Standard Metal Seat)
Edition: 2021-04 Original document - Mi-205 EN Replacing the seat (standard metal seat) MTV To replace the seat, the complete valve assembly is dismounted from the pipeline Chap. 6.1) and sometimes the actuator must also be removed from the valve ( Chap. -
Page 41: Disassembly
Original document - Mi-205 EN Edition: 2021-04 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 42: Replacing The Ptfe Seat
Edition: 2021-04 Original document - Mi-205 EN Replacing the PTFE seat MTV To replace the seat, the complete valve assembly is dismounted from the pipeline ( Chap. 6.1) ➔ and sometimes the actuator must also be removed from the valve ( Chap. -
Page 43: Disassembly
Original document - Mi-205 EN Edition: 2021-04 6.5.1 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 44: Replacing The Fire Safe Seat
Edition: 2021-04 Original document - Mi-205 EN Replacing the Fire safe seat FSV To replace the seat, the complete valve assembly is dismounted from the pipeline Chap. 6.1) and sometimes the actuator/gear must also be removed from the valve. ➔ Attention! To change the seat, the butterfly valve has to be safely fixed in a fastening device! Danger! -
Page 45: Disassembly
Original document - Mi-205 EN Edition: 2021-04 6.6.1 Disassembly Note The replacement of the seat should be made with installed manual gear unit. 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 46: Adjustment Of The End Position On Pneumatic Actuator
Edition: 2021-04 Original document - Mi-205 EN Adjustment of the end positions on pneumatic actuator 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 47: Setting Of The "Closed" Position On The Butterfly Valve
Original document - Mi-205 EN Edition: 2021-04 6.7.1 Setting of the “closed” position with type MTV 1. Connect compressed air via a pressure reduction valve. Adjust the pressure to 3 bar. 2. Operate the valve to test. Leave it in the closed position. -
Page 48: Adjustment Of The End Position On Gear
Edition: 2021-04 Original document - Mi-205 EN Adjustment of the end positions on gear 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 49: Setting Of The "Closed" Position On The Butterfly Valve
Original document - Mi-205 EN Edition: 2021-04 6.8.1 Setting of the “closed” position on the butterfly valve type MTV/FSV 1. Operate the valve to test. 2. Check if the butterfly touches the seat in the closed position. 3. The adjustment is correct if the butterfly touches the seat. -
Page 50: Leak Test Of The Valve
Edition: 2021-04 Original document - Mi-205 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 51 Original document - Mi-205 EN Edition: 2021-04 Nominal Max. differential pressure Gaskets Force of Torque size (closed valve) [mm] pressure total ø ø [Nm] inside outside 100-120 120-165 180-220 200-250 250-290 400-500 500-620 800-1000 1000-1350 1900-2700 Tab.6-1 * DN80 only for MTV...
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Page 52: 6.10 Components
Edition: 2021-04 Original document - Mi-205 EN 6.10 Components 6.10.1 MTV DN 80-150, with metal seat Fig.6-11 DN 80-150, with metal seat Stuffing box gland 10 Cover plate 19 Plug Shaft Valve body 14 Seat 20 Screw Stud Stuffing box kit... -
Page 53: Mtv Dn 200-300, With Metal Seat
Original document - Mi-205 EN Edition: 2021-04 6.10.2 MTV DN 200-300, with metal seat Fig.6-12 DN 200-300, with metal seat Stuffing box gland 10 Cover plate 18 Gasket Shaft, upper (DN 200-500) Valve body 14 Seat 19 Plug Stud Stuffing box kit... -
Page 54: Mtv Dn 350-500, With Metal Seat
Edition: 2021-04 Original document - Mi-205 EN 6.10.3 MTV DN 350-500, with metal seat Fig.6-13 DN 350-500, with metal seat Stuffing box gland 10 Cover plate 18 Gasket Shaft, upper (DN 200-500) Valve body 14 Seat 19 Plug Stud Stuffing box kit... -
Page 55: Mtv Dn 80-150, With Ptfe Seat
Original document - Mi-205 EN Edition: 2021-04 6.10.4 MTV DN 80-150, with PTFE seat Fig.6-14 DN 80-150, with PTFE seat Stuffing box gland 10 Cover plate 19 Plug Shaft, upper (DN 200-500) Valve body 14 Seat complete 20 Screw Stud... -
Page 56: Mtv Dn 200-300, With Ptfe Seat
Edition: 2021-04 Original document - Mi-205 EN 6.10.5 MTV DN 200-300, with PTFE seat Fig.6-15 DN 200-300, with PTFE seat Stuffing box gland 10 Cover plate 19 Plug Shaft, upper Valve body 14 Seat complete 20 Screw Stud Stuffing box kit... -
Page 57: Mtv Dn 350-500, With Ptfe Seat
Original document - Mi-205 EN Edition: 2021-04 6.10.6 MTV DN 350-500, with PTFE seat Fig.6-16 DN 350-500, with PTFE seat Gland 10 Cover plate 18 Gasket 23 Bearing Shaft, upper Valve body 14 Seat complete 19 Cover Stud Stuffing box... -
Page 58: Fsv Dn 100-150, With Fire Safe Seat
Edition: 2021-04 Original document - Mi-205 EN 6.10.7 FSV DN 100-150, with Fire safe seat Fig.6-17 DN 100-150, with Fire safe seat Box gland 10 Cover plate 19 Plug 32 Fire safe seat Shaft Valve body 14 Seat complete 20 Screw 33 Guide ring Stud Stuffing box kit... -
Page 59: Fsv Dn 200-500, With Fire Safe Seat
Original document - Mi-205 EN Edition: 2021-04 6.10.8 FSV DN 200-500, with Fire safe seat Fig.6-18 DN 200-500, with Fire safe seat Box gland 10 Cover plate 19 Plug 32 Fire safe seat Shaft Valve body 14 Seat complete 20 Screw 33 Guide ring Stud Stuffing box kit... - Page 60 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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