Installation and service instruction
Contents
1. B4 Necessary support for special cases The dead weight of a valve in large dimension together with its actuator may cause tensions deformations in the valve that could affect the valve s function specifically when it is installed at inclined positions or in a vertical pipe In these cases the valve and or actuator shall be supported to avoid functional failure Valves that are exposed to vibrations or other mechanical stresses can be subject to forces that will affect valves tightness and ability to operate In these cases the valves and actuators shall be supported to avoid function failure Support details are the responsibility of the customer Stafsj6 will assist on request B5 Steps to install On handwheel operated valves when the handwheel is not assembled at delivery follow the steps below to assemble the handwheel to the valve Fig 3 Assembling of handwheel Handwheel with non rising Handwheel with rising stem stem 1 Assemble the handwheel to 1 Loosen the nuts from the 2 Assemble the handwheel 3 Remove the safety pin For the valve Check that there is tie rods and remove the unit to the tie rods and fixate it safety reasons the pin shall not any play between the tempo rary yoke plate with wa2. Stafsjo SINCE 1666 A Broer Group company PTFE 1 4301 ae e fepom rare wer fiae vin nor ore other _ www stafsjo com Additional Markings on casted valve body DN XXXX mm nominal diameter PN XX bar pressure class of valve body i e GGGS5O valve body material Label for identification of seat and gate material These labels shall not be removed over coated or otherwise covered Max PS Valve body which is marked on the label See above is max allowed pressure when the valve is open Max allowed pressure on closed valves may be lower and is marked on this label as well More information on this is available in the data sheet which can be downloaded from www stafsjo com Refer to the Serial Number of the valve marking at any contact with Stafsjo A5 Transport storage and handling Note Additional requirements may be found in the actuator instruction if any Storage and transport Keep the valve in open position during storage to ensure its function and to protect the polished surface of the gate Store the valve in a clean and dry environment and protect it against dirt dust and other contamination Do not expose the valve to direct sunlight If the valve is stored outside it shall be wrapped tightly in a plastic foil or similar to protect it against moisture or any dirt contamination It should also be stored high enough without any risk to be covered in snow or enclosed
3. The surrounding environment should not imply any risk to the valve This also implies to explosive environment except for valves classified for ATEX area x and marked accordingly Installation of the knife gate valve is preferred with the actuator in an upward position except for RKO JTV and D2G At valve operation respect e The manufacturers declaration to EC directives e This original installation and service instruction which is supplied together with the valve Stafsj6 Valves AB does not accept any responsibility if this Valve destination is not observed A3 Related documents Further information on the valves is available on www stafsjo com ds valve type i e ds BV Data sheet with technical information dimensions material specification etc mi valve type e mi BV Instructions for maintenance on each valve type sp valve type i e so BV Specify spare parts for each valve type acc type of accessory i e acc SV Accessory for different types of valves l e solenoid valve stafsjo valve spec Specification of parts and valve combinations Original installation and service instruction Knife gate valves A4 Valve marking Each valve is labelled as follows Stafsj CEs SINCE 1666 Art No MVLO20F50P00 Ser No 2010 195113 59666 Max PS Valve body differential 10 10 BAR Ser No Serial number consisting of year individual no order number CE marking when applicable
4. Norrk ping Reg No 0640 Machine Directive 2006 42 EC MD Automatically manoeuvred valves fulfill the demands in this directive as a partly complete machine This declaration is considered as a declaration of Incorporation 2006 42 EG does not apply if the valve is actuated manually observe the Table below e ATEX Directive 94 9 EC the directive is fulfilled only when the valve is labelled with CE marking The valves comply with this directive The conformity rating procedure used according to EN13463 5 2003 Non electric equipment intended for use in potentially explosive atmospheres Part 5 Protection by con structional safety C For Group Il Category 3 G D zone 2 and 22 Product documents are available on the following Design documentation Technical data sheets catalogue pages Stavsj6 2011 02 08 ih _ Thomas Carlson General Manager To comply with the directive above the following applies The use of the valve must comply with the lt valve destination gt defined in the Original Installation and Service Manual IS VALVES supplied with the valve and must follow all instructions in this manual If this manual is not followed the manufacturer may in serious cases be released from his product liability 2 The valve shall not be put into operation and the fitted actuator if any until the conformity to all applicable EU directives above of the system into which the valve is fitted
5. health is at stake if this is not observed Any other action is the responsibility of the user Disassemble the valve in following steps 1 Depressurise the pipe section and drain it completely 2 Disconnect all electric and or pneumatic hydraulic connections 3 Fasten and use soft straps if necessary see also Fig 1 in section A5 Make sure not to damage the valve gate gate guards or any accessory 4 Take out the valve from the pipe carefully in order to protect the flange gaskets 5 At transport and storage observe section A5 C Service and maintenance Note Additional requirements may be found in the actuator instruction The user shall make a risk analysis as per Machinery Directive 2006 42 EC for the pipe system Stafsj supplies the following documents for it e The original installation and service instruction of the valve e An installation and service instruction of the actuator if any e The manufacturer s declaration s to EC Directives This instruction includes safety notes for industrial application for any foreseeable risk at use of the valve It is the responsibility of the user planner to complete this instruction with warning notes for plantspecific risks Further information on Stafsjo s valves is available on www stafsjo com Original installation and service instruction Knife gate valves C1 Safety warnings at service and maintenance At operation the function of the valve shall be in compli
6. the valve body and the flange Check that the gasket is well centered and covers the complete surface of the retainer ring Valve types WB and SLV only These valve types are equipped with integrated rubber flange gaskets additional gaskets are not necessary 2 Lubricate the bolts This allows correct pre setting of the flange and makes it easier to dismantle the bolting later All Valve types Flange bolts of right length are necessary e Too long bolts could deform the valve body and result in leakage in the flange e Too short bolts could deform the threaded holes in the valve body at installation Choose bolts with the correct thread and length according to the flange drilling information in the data sheet 3 Tighten the bolts first manually and then evenly and crosswise for a uniform load of the gasket with a torque as required by the gasket manufacturer Valve type SLV shall be assembled with the mating surfaces of the valve body and the pipe flanges up to metal metal contact See Fig 5 Make sure that the flange is centered and is covering the metal frame around the seat picture 3 Tighten flange bolts crosswise to eliminate an between body and flange Original installation and service instruction Knife gate valves 4 To finish the installation make an operational test by opening closing the valve Observe the actuator if any instructions e A valve with handwheel should be operated with normal hand for
7. A valve without an actuator should not be installed into the pipe system e Some valve types can be installed as end valves Contact Stafsj6 for specific requirements and information 1 A valve with an actuator shall only be operated if e The valve is installed between flanges or between a flange and a protective device e The gate guards are installed on the beams on automatic operated valves 2 If the knife gate valve is installed as an end valve in a pipe line always install protective equipment to prevent people getting to close to the valve and being exposed to the media transported in the system when the valve opens People s life and health is at stake if this is not observed Any other action is the responsibility of the user B2 Conditions for installation Make sure e To install valves according Valve destination see section A2 Observe valve marking see section A4 e That the pipe section is not exposed to vibrations or other mechanical stresses which could deform the valve body and affect the valve s tightness and or ability to operate e That the valve environment does not imply any risk to the valve the actuator or the accessories This also implies to explosive environment except for valves classified for ATEX area and marked accordingly e That flanges pipe line and the valve are empty free from solid and sharp particles e That the valve is installed between flange s fixed or loose to ensu
8. Document Installation and service instruction original IS VALVES Products Knife gate valves Issue 6 Issue date 2011 09 12 Stafsj O SINCE 1666 Original Installation and service instruction Knife gate valves Table of contents A UN UA ccesh circa as ee wissis seinen cen science E eee ane sncans aieinetag aunceees aunaw seo sancedeeasseetanensaesunencoaneavaeessenens 2 Ped a VDO a a tusesscieep astoioan E A sua aiemaninar ie sales aalestatience 0 Ansan nase atoeente toga ndanipsa E 2 PA yave CSS ATOM eer E E E sat paushancdcdaniaedydaunebiidatuteebunieneisdassbechsanentingstotaeadentte 2 A3 SVAN I nS cape cece sarc cco ctw nates ical se da N ak ents potas aio a anand acm pug uiaiuaiD sek E A 2 PAINS AAC aca crs ceizgeeciessis cnc ess nein S N 3 A5 Transport storage and WANING sxrsienie cisceibicsssciapnansizce dcten soepiandir dotendarndaemannipsiege ddeedemmontp eau sumed naiencinteaasdeadaaganeriotedunndeweaaansiee 3 SlOhAGeS ANIC transpor 3 nasccsaceascnsesntecedetedesavinentccadaseeennunuedieotetieceaseeudeoosessdanmedebdecodetedssasarniedobabeneeenceeaceodatedeeerse sine 3 P e E T er ee ee ee eee eee 3 B InStallation fUNnCiONall GNECK osci A Aaa 4 Bi Safety warnings at installation ccccccccccceccscccccesssssseeeeeeeeeeeecesceccccsssseeeeeeeeeeeeeeesseeeccccassseseeeeeeeeeseeeeseseecoassess 4 B2 Conditions TOP IMSIANGUION sneer aaepe Aar a aa EE aiea ar ea ERES 4 B3 Pressure flow direction an
9. EU Directives 00 0 ccc ccccccceeeeeee eee eeeeeeeaeeeeeeeeaaaeeeeeeaaaaeeeeeaaaeeeeesaeaeeesessaaeeesessaaeeesessaneeeeess 11 All specifications are subject to change without notice Stafsjo Valves AB SE 618 95 Stavsjo Sweden Tel 46 11 39 31 00 Fax 46 11 39 30 67 info stafsjo se www stafsjo com A Broer Group Company Original installation and service instruction Knife gate valves A General In this instruction a knife gate valve is shortly called valve A1 Symbols In this instruction notes and warnings are marked with symbols Danger Warning Points out a dangerous situation which may cause personal injuries or death Advice Has to be respected Information Information useful to follow If these notes and warnings are not respected by the user dangerous situations may occur and may invalidate the warranty of the manufacturer A2 Valve destination Valve types BV D2G HG HL HP JTV MV RKO RKS SLV TV XV and WB are destined after installation between flange s in a pipe system to shut off to open or to control the flow within the admissible pressure temperature limits These pressure and temperature limits depend on the materials of valve body gate and seat Temperature limits are defined in the valve data sheet of each type Maximum working pressure are marked at the valve body and on the label attached on the beam The flow shall be without vibrations and or pressure chocks
10. age see section B7 for recommended maximum torque Original installation and service instruction Knife gate valves C4 Troubleshooting Problem Reason Measure Leakage from stuffing box Gland bolting too loose See relevant maintenance instructions packing Worn out box packing issued by Stafsj Incorrectly installed box packing Download www stafsjo com Damaged gate Leakage at Wrong length of bolts in flanges See this instruction section B7 flange connection Loose flange bolting See Stafsj s maintenance instructions and Valve not centred at flange connection relevant data sheet Valve not parallel to flanges Download www stafsjo com Gasket not centred Wrong gasket material Leakage through valve Worn out seat sealing profile See relevant maintenance instructions bore Valve does not close 100 issued by Stafsj Damaged seat or gate Download www stafsjo com See instruction for actuator if an Gate does not open close Fault in actuator See instruction for actuator accessories completely Fault in limit switch setting See the relevant maintenance instructions Valve clogged issued by Stafsj Damaged seat sealing profile or Download www stafsjo com Gate does not open close Fault in actuator See the relevant instruction for actuator in a smooth movement Valve clogged See relevant maintenance instructions Damaged seat sealing profile or gate issued by Stafsj Not enough air supply pressure Download www stafsjo com Not enough air flow
11. ance with the lt Valve Destination gt see section A2 The service conditions of the valve shall be in compliance with the valve markings see section A4 Service and maintenance shall be performed by qualified personal Qualified are those persons who due to experience can judge the risk and execute the work correctly and who are able to detect and to eliminate possible risks At service the valve should be inspected periodically preferably every day for leakage or other external effects that could affect the safety for the personnel Valves destined for use in a ATEX classified zone must be marked according to the ATEX directive At any start up the gland box shall be visually inspected for leakage If any are detected the nuts shall be tightened according to table in section B7 Except for this action no maintenance is allowed on the valve when the pipe line is pressurised At maintenance or repair of an actuator it shall be disconnected as described in section B8 The pipe section must be free from pressure and completely drained at both sides of the valve before any maintenance begins Some valve types can be installed as end valves Contact Stafsj6 for specific requirements and further information The temperature of the exterior parts of the valve depends of the fluid temperature inside any protective insulation is in the responsibility of the user 1 The gland box packing together with the gland makes sure that no media reaches sur
12. by water The valve has been packed according to the terms of delivery It is important to make a visual inspection at arrival If transport damage is detected report to the transportation company Handling Lifting and moving shall be carried out with soft straps Place and fasten the soft strap on the valve body as shown in Fig 1 Make shure that all equipment is designed to hold the weight of the valve Never place lifting equipment e On the actuator accessories or gate guards e In the bore of the knife gate valve since it cause damages to the seat and retainer ring Original installation and service instruction Knife gate valves B Installation functional check This instruction includes safety recommendations for foreseeable risks at installation into a pipe system The user is responsible to complete this instruction with warning notes for system specific aspects All requirements of the system shall be observed B1 Safety warnings at installation e Installation shall be performed by qualified personal Qualified are those persons who due to experience can judge the risks and execute the work correctly and who are able to detect and eliminate possible risks e After installation the function of the valve shall be in accordance with the valve and the actuator if any destinations see section A2 e At the end of the installation the gland bolting shall be tightened according to Table in section B7 e
13. ce Exceptional force used to close the valve can damage it e A valve with electric oneumatic actuator shall be operated by the plant control signals into its end positions i e OPENED and CLOSED e At connection of an actuator to the plant control system the actuator s instructions shall be followed 5 Ifthe pipe line is to be cleaned by flushing in order to wash out impurities the valve must be opened 100 Valves with actuator supplied by Stafsj6 are exactly adjusted in the end positions This adjustment shall not be changed as long as the valve operates correctly Only for Valves with electric actuator Ensure that the actuator motor stops by the signal of the limit switch of the actuator Exceptional force may damage the valve The signal of the torque switch may be used for signal for faulted conditions For further information see the actuator instruction B6 Installation in an ATEX classified area Note Additional requirements may be found in the actuator instruction if any This ATEX instruction ts valid along other instructions in this document In ATEX classified zones in accordance with ATEX Directive 94 9 EC only valves with ATEX classification and the relevant valve marking shall be installed Additional to the requirements above make sure that e The valve is part of the plants earthed system e The user has performed a risk analysis of the pipe line and valve in accordance with the guidelines of ATEX Di
14. d valve position cccccccseeeecceeeeeeceeeeecseeeeeceaeeeeseaeeeeseueeesaaeeeeseueeeesegeeessaeeeesaneeeeseeessnes 4 B4 Necessary support for special CASES cceeeccceeceeeeeeeeeeeaseeeessaaaeeeeesaaaeeeesseaaaeeeeseaaaeeesseaaeeeeessaaaeeesssaneeeeessaneeeeees 5 BG OEPS OM 62 gt ae aeene ener ena ne ar een ae ne ne re Sec ne ene nee er ee ee er amr ee eee eee eee one 5 B6 Installation in an ATEX classified area p cccccccccsscsccesccesccsscsssesssesecsecssecsuscaesesssaeseueceuecauseaeseaeseaseeseeneeceseeteats 7 B7 Pressure testing after installation if NECESSALY cee cceeeeeeeeeee eee eeeeeeeaee cece esaeaeeeeesaaaeeeeesaaaeeeeesaaaeeeeessaceeesessaneeeeees 7 B8 Di assombDling ihe VAY x csancesaraegsitacneosscnavcedacaanzecauasee secu aciuneecoaecetacleteanaepalugsacnnceaseanyecedaseatwaaasauiee psamuscieatoos auietacecsentee 7 C Service and maintenance vicsccsseecacasssssncexenecanceeeosainnceeansanavechanuseeeasanshoensenskanasanwiadauesessnnneuanssauenebeniimmudechaaseeiensaeeeees 8 C1 Safety warnings at Service and maintenance cccccccccceccceeeeeeeeeeeeeeeeeeeceeeeeeeeeaaaaaeasueeeeeeeeeeeeeeeseesaaaaaanseeeeseseeeees 9 C2 Manual and automatic actuation tcscccscceceescpansnecseeduveseck ces ceddenis doacaseseresebmeacacsabickadones dekceeecdebe soins det axeeceedeueiecue stoned 9 G3 WVPANIMVS NIAC Gersei E EREE S E 9 C4 Troubleshooting etc cisc ces doce e e ERE E EE eE 10 Declaration in compliance with
15. formity with the directive 2006 42 EG Requirements from Annexes IV VIII to N l ot applicable 11
16. has been declared by the persons responsible A separate declaration is supplied for the actuator named above 3 Stafsj6 Valves AB has made and documented the required risk analysis the Stafsja6 Valves AB employee responsible for this documentation is Ulrika Bjorn SE 618 95 Stavsj Manufacturer STAFSJO Valves AB SE 61895 Stavsj Sweden declares that a STAFSJO knife gate valve complies Directives 2006 42 EC as follows Requirements as per Annex 1 of the Directive 2006 42 EC 1 1 1 h Valve destination See original installation and service instruction 1 1 2 c foreseeable misuse See original installation and service instruction section B1 and C1 1 h 2 C Same as the pipe section into which the valve is installed See original installation and serviceinstruction section 1 1 2 d protecting measures personnel Bi 2 1 1 2 e accessories for maintenance No special tools are necessary bth All valve material in contact with media are specified in the order acknowledgement and or on the valve s marking 1 1 3 material in contact with the fluid er tr The relevant risk analysis is the responsibility of the user 1 1 5 handling See original installation and service instruction 1 2 and 6 2 control system Is the responsibility of the user in combination with the instruction of the actuator For parts under pressure See declaration of conformity to the PED 97 23 EC 1 3 2 withstand to stresses For functional parts Ensured a
17. pes XV HL HG HP BV WB D2G and SLV are bi directional and can therefore be installed independent of the pressure ratio in any direction in the pipe line Valid for MV only This valve type has different differential pressure AP capacities in the flow directions The maximum AP capacity of the valve is achieved when the SEAT SIDE is installed as the valve outlet towards P2 provided that P1 gt P2 When the valve is closed the pressure ratio shall be P1 gt P2 Some sizes of MV equipped with specific seats are capable to handle certain differential pressure in reversed pressure direction For further information see data sheets on www stafsjo com Valid for RKO and RKS only These valve types have different differential pressure AP capacities in the flow direction The maximum AP capacity of the valve is achieved when the seat side is installed as the valve inlet towards P1 provided that P1 gt P2 When the valve is closed the pressure ratio shall be P1 gt P2 Valid for TV only This valve shall be installed with the seat side to the tank The removable retainer ring shall be mounted towards the tank which implies that changing of the seat can only be done when the tank is empty e All valve types except for valves D2G JTV RKO and RKS are preferred to be installed in a horizontal pipe system with the actuator in a vertical upright position Valid for D2G RKO JTV and RKS only These valve types are designed to be installed in a vertical pipe
18. re that the valve is securely fixed and that the flange keeps tight e That the knife gate valve is protected against radiant heat if the valve is placed near a heat source whose temperature exceed maximum allowable temperature for the valve or its actuator e The mating gasket contact surface of the flange cover the retainer ring completely Detailed information on flange drilling threads length and number of bolts is available in data sheet on www stafsjo com e Those instructions which are supplied with an actuator if any will be followed e The pipe line is free from pressure e Additional requirements may be found in the actuator instruction specifically to adjust the correct OPEN and CLOSED positions before the valve is installed P SEAT SIDE B3 Pressure flow direction and valve position RC ARS SEAT SIDE When the knife gate valve is open P1 P2 the pipe line pressure may not exceed So maximum allowable working pressure body according to each valve When the valve is l j MV closed the differential pressure AP is the difference between P1 and P2 AP P1 a Pt P2 Fig 2 E Original installation and service instruction Knife gate valves The differential pressure AP may not exceed maximum allowable differential pressure according to each valve Maximum allowable differential pressure for closed valve is available in data sheets e Valves ty
19. rective 94 9 EC B7 Pressure testing after installation if necessary Each Valve has been tested before delivery by the manufacturer according to EN12266 1 For pressure test of the pipe section with a knife gate valve installed the conditions for the system apply but with the following restrictions e The pressure test shall not exceed 1 5 x max working pressure of the valve see valve marking The gate shall be open e Pressure test with valve in closed position shall not be tested more than 1 1x max differential pressure in preferred pressure direction see datasheets in order to prevent overload of the gate Immediately at this operation check the stuffing box tightness In case of leakage Tighten the gland nuts evenly crosswise and bit by bit until leakage stop Do not tighten more than necessary Recommended maximum torque B8 Disassembling the valve Note Additional requirements may be found in the actuator if any instruction Original installation and service instruction Knife gate valves For the valve the same safety instructions apply as for the pipe system and for the control system to which the actuator if any is connected The respect of these requirements shall be followed Disassembling the valve from the pipe line may only be done when e the pipe section is free from pressure and is empty e all the electronic and or pneumatic hydraulic connections have been disconnected Danger People s life and
20. rounding environment where the gate exit the valve body When the gland box packing braids shall be changed the gland bolts must be loosened and the the pipe section shall be depressurised and empty 2 A valve with an actuator shall be actuated only if e The valve is installed between flanges or between a flange and a protective device e The gate guards are installed on the beams on automatic operated valves 3 If you install the knife gate valve as an end valve in a pipe line always install protective equipment to prevent people getting to close to the valve and being exposed to the media transported in the system when the valve opens People s life and health is at stake if this is not observed Any other action is the responsibility of the user C2 Manual and automatic actuation A knife gate valve with handwheel closes clockwise A valve with automatic actuator is operated following the signals from the plant control system Valves equipped with actuator supplied by Stafsj6 are exactly adjusted to stop in the exact end positions This adjustment shall not be changed as long as the valve operates correctly Valves with infrequent operation A test with full actuation movement should be performed once a month to verify that the valve function correctly C3 Maintenance As long as the valve is tight the only maintenance that has to be performed is a visual control of the stuffing box tightness Tighten the gland at any leak
21. shers and nuts Attach not be removed until the actuator bearing and yoke If the gate clevis to the gate and handwheel unit is assembled there is eliminate the play by fixate with clevis pin and split and the gate clevis is rotating the stem 360 degrees pins properly attached to the counter clockwise Then fixate gate the handwheel with a locking nut Original installation and service instruction Knife gate valves When the handwhell is assembled install the valve into the pipe system When installing the valve make sure that N S N Pa ad fo e The valve s centre line is on the same centre line as the ina flanged pipe s m i A gt e Flange surfaces of the pipe and valve must be exactly JT A parallel a P 1N If the flanges and the valve are not centred the valve may be damaged by erosion and a dirt pocket may occur which can lead to clogging and corrosion of the valve e Valve type RKO and XV must be installed in closed position only e Valve type SLV must be installed in open position only Also note that SLV s bottom cover is only allowed to be mounted on the valve when flushing is made through the purge ports in the valve body 1 Place the gaskets between
22. suppl Too large force to Gland nuts tightened by too high torque See the relevant maintenance instructions open close the gate Valve exposed to stress tension issued by Stafsj too high hand force as Valve clogged or deformed Download www stafsjo com well Damaged seat gate When tightening the gland box bolts See Table section B7 Stafsj can offer maintenance of valves Contact Stafsj or your local representative for further information Stafsj does not accept any responsibility for the product if wear parts not tested and approved by Stafsj are used on the valve Stafsj6 does not accept any responsibility for the product if maintenance instructions are not followed during maintenance 10 Original installation and service instruction Knife gate valves Declaration in compliance with EU Directives The manufacturer Stafsjo Valves AB SE 618 95 Stavsj Sweden declares that valve types BV D2G HG HP HL JTV MV RKO RKS SLV TV XV and WB are manufactured in accordance with the requirements of the following standards and EU Directives EN ISO 12100 2010 Safety of machines Basic terms general design guidelines e Pressure Equipment Directive 97 23 EC PED Art 3 Paragraph 1 3 or Art 3 Paragraph 3 applies The valves comply with this directive The conformity rating procedure used according to Annex III of the Pressure Equipment Directive 97 23 EG is For Category II Module A1 Notified body AF Kontrol AB SE 60102
23. t contractual use of the valve Requirements are fulfilled at contractual use of the valve see original installation and service instruction Observe the warnings Delivered gate guards must be installed on the valve No maintenance is allowed when the pipe line is pressurized or the automatic actuator is connected If the valve is modified by the customer new actuator necessary protective devices shall be installed Ask Stafsj6 for support 1 5 1 1 5 3 energy supply In the responsibility of the user in combination with the instruction of the actuator Mies COMAC SUNAR WANGAN See warning in the Original installation and service instruction 1 5 7 explosion x protection may be necessary This shall be confirmed in Stafsjo s order acknowledgement Observe the valve s marking and relevant instruction from Stafsjo 1 5 13 emission of dangerous Not applicable at not dangerous fluids substances 3 For dangerous fluids pay attention when re tightening the gland box Personal safety equipment may be necessary 1 6 maintenance See original installation and service instruction 3 1 3 7 8 risks related to moving parts Knife gate valve see original installation and service instruction 1 7 3 marking i Actuator see actuator instruction 1 7 4 service instruction See original installation and service instruction and actuator instruction Requirements from Annex llI The knife gate valve is not a complete machine No CE marking for con
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