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PERSTA 700 HJ Operating Instructions Manual

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Operating instructions
Gate valves
GJ, HJ, JJ and JN
Read the instructions prior to performing any task!

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  • Page 1 Operating instructions Gate valves GJ, HJ, JJ and JN Read the instructions prior to performing any task!
  • Page 2 Mülheimer Str. 18 59581 Warstein-Belecke Germany Telephone: +49 2902 762-02 Fax: +49 2902 767-03 Email: info@persta.de Internet: www.persta.com Translation of the original operating instructions Dok.-Nr. 6415.DE.STD.12.2015, 2, en_GB © Stahl-Armaturen PERSTA GmbH 2015 Gate valves GJ, HJ, JJ and JN 20.05.2021...
  • Page 3 Pressure rate Class (DN) [mm] Small gate valve 808 GJ / GN 10–40 PN 10–100 Small gate valve/ 800 GJ / 808 GJ 15–50 PN 10–40 VALTRA Gate valves 700 HJ / 700 JJ 50–150 PN 10–100 (700 GA / 700 JN)
  • Page 4 Bolt tightening torques according to the website: www.persta.com As well as the other documents included in the delivery Customer Service - Stahl-Arma- Mülheimer Str. 18 turen PERSTA GmbH 59581 Warstein-Belecke Germany Phone: +49 2902 762-02 Fax: +49 2902 767-03 e-mail: info@persta.de...

  • Page 5: Table Of Contents

    Table of contents Table of contents Overview................7 Safety................... 9 2.1 Symbols in this manual..........9 2.2 Intended use............... 11 2.3 Safety signs..............12 2.4 Safety devices............14 2.5 Residual risks............. 17 2.5.1 Basic dangers at the workplace....... 17 2.5.2 Hazards due to electric current (in versions with electric actuator)............
  • Page 6 Table of contents 5.6 For hydraulic actuator: connecting the hydraulic system................ 49 5.7 For pneumatic actuator: connecting the pneumatic system................ 50 5.8 After the installation............ 50 5.8.1 Pickling the valve............. 51 5.8.2 Painting the valve............ 51 5.8.3 Performing a system pressure test and leak test..52 5.8.4 Applying thermal insulation........

  • Page 7: Overview

    Overview Overview Fig. 1: Gate valve Actuator (in the example: handwheel) Body Stem Shut-off element (in the example: flexible discs) Bonnet (fixed permanently to cover) Flow passage Cover Brief description The valves that are termed “gate valves” are installed in pipes. The body (Fig.
  • Page 8 Overview hydraulically pneumatically Ä Chapter 3.3.2 “Actuator variants” on page 34. Media Depending on the version of the gate valve, it is suitable for use with water, steam, oil and other non-aggressive media. Tools The following tools are required for the tasks described in the oper- ating instructions: Forklift Forklift with sufficient load-bearing capacity for transport of valves.

  • Page 9: Safety

    Safety Symbols in this manual Safety 2.1 Symbols in this manual Safety instructions Safety instructions are indicated by symbols in this manual. The safety instructions are introduced by signal words that indicate the scope of the hazard. DANGER! This combination of symbol and signal word indi- cates a hazardous situation that, if not avoided, will result in death or serious injury.
  • Page 10 Safety Symbols in this manual Example: Loosen the bolt. CAUTION! Risk of getting trapped by the cover! Close the cover carefully. Tighten the bolt. Special safety instructions The following symbols are used in the safety instructions to indi- cate special hazards: Warning signs Type of danger Warning –...

  • Page 11: Intended Use

    Safety Intended use 2.2 Intended use Valves of the specified series are designed for installation in pipes under the following conditions: Operation of the valve as an open/close valve. Operation of the valve with liquid or gaseous media, without particularly corrosive, chemical, or abrasive influences. Temperature change speeds from approx.

  • Page 12: Safety Signs

    Safety Safety signs Misuse WARNING! Danger in the event of misuse! Misuse of the valve can cause dangerous situa- tions. – Never use the valve in potentially explosive areas without complying with the instructions and measures contained in the ignition hazard assessment GA004.
  • Page 13 Safety Safety signs WARNING! Danger if signs are illegible! Over time, stickers and signs can become fouled or can become illegible in some other manner, so that dangers are not recognised and necessary operating instructions cannot be complied with. This results in a danger of injury. –...

  • Page 14: Safety Devices

    Safety Safety devices 2.4 Safety devices Fig. 2: Division into “chambers” In the closed position, there are 3 “chambers” in the valve: 1st chamber: pressurized side (Fig. 2/1) 2nd chamber: non-pressurized side (Fig. 2/2) 3rd chamber: shut-off inner chamber (Fig. 2/3) Have the operating company safeguarded the 3rd chamber against overloading.
  • Page 15 Safety Safety devices Optional connection for external safety devices Depending on the application, the valve (Fig. 3/1) may need to be equipped with an external overpressure safety device by the oper- ating company. In this regard, the valve can be delivered with a factory-sealed nozzle by the manufacturer (Fig.
  • Page 16 Safety Safety devices Equalizing pipe An equalizing pipe (Fig. 5/1) is used to create a connection between the 3rd chamber (Fig. 2/3) and the pressurised side (Fig. 2/1 (1st chamber)) of the valve. WARNING! Risk of injury from alternating flow direction! There is a risk of serious injury if the specified flow direction is not complied with when an equalizing pipe is used to protect the valve.

  • Page 17: Residual Risks

    Safety Residual risks > Basic dangers at the workplace Bore in the seat ring An optional bore in the seat ring prevents pressure in the body from exceeding the operating pressure of the valve. WARNING! Risk of injury from alternating flow direction! There is a risk of serious injury if the specified flow direction is not complied with when a bore in the seat ring is used to protect the valve.

  • Page 18: Hazards Due To Electric Current (In Versions With Electric Actuator)

    Safety Residual risks > Hazards due to hydraulics (in versions with hydraulic actuator) Trip hazard CAUTION! Danger of injury due to tripping up! There is a danger of fall injuries in the area of use of the valve. – Install cable and connection lines in such a manner that there are no trip hazards.

  • Page 19: Hazards Due To The Pneumatic System (In Versions With Pneumatic Actuator)

    Safety Residual risks > Mechanical hazards 2.5.4 Hazards due to the pneumatic system (in versions with pneumatic actuator) Hazards associated with the pneu- matic system WARNING! Danger of injury due to pneumatic energy! Pneumatically-powered components of the valve, can cause severe injuries. –...

  • Page 20: Thermal Dangers

    Safety Residual risks > Dangers due to hazardous substances and operating materials 2.5.6 Thermal dangers Thermal dangers WARNING! Danger of injury due to high/low temperatures! Depending on the insert of the valve or of the pipe, injuries can occur due to the high or low tempera- ture of the components.
  • Page 21 Safety Residual risks > Dangers due to hazardous substances and operating materials WARNING! Pumping medium is a health hazard! Contact with the pumping medium can have health implications. – Handle pumping medium in accordance with the instructions in the manufacturer’s safety data sheet.

  • Page 22: Behaviour In The Event Of An Emergency

    Safety Behaviour in the event of an emergency Gloss paint WARNING! Gloss paint is a health hazard! Direct contact with the gloss paint used can have health implications. – Handle gloss paint in accordance with the instructions in the manufacturer’s safety data sheet.

  • Page 23: Personnel Requirements

    Safety Personnel requirements 2.7 Personnel requirements WARNING! Danger of injury due to inadequate personnel qualification! If unqualified personnel perform tasks on the machine or are present in the danger zone, dan- gers occur that can cause severe injury and signifi- cant material damage.
  • Page 24 Safety Personnel requirements Pipeline engineer Based on their specialised training, skills, experience and knowl- edge of the applicable standards and provisions, the pipeline engi- neer is able to carry out the work assigned to them and to inde- pendently identify potential hazards and avoid them. The pipeline engineer is able to install valves safely and properly in the pipework.

  • Page 25: Responsibility Of The Operating Company

    Safety Responsibility of the operating company Unauthorised persons WARNING! Risk of fatal injury for unauthorised persons due to hazards in the danger zone and work area! Unauthorised persons who do not satisfy the requirements described here are not aware of the hazards in the work area.

  • Page 26: Personal Protective Equipment

    Safety Personal protective equipment The operating company must obtain information about the appli- cable occupational health and safety regulations and, in a hazard assessment, identify the additional hazards that may exist at the installation site of the valve due to the specific working conditions.
  • Page 27 Safety Personal protective equipment During the various tasks performed on and with the machine, per- sonnel must wear personal protective equipment, to which special reference is made in the individual sections of this manual. Description of the personal protec- The personal protective equipment is described below: tive equipment Chemical resistant safety gloves Chemical resistant safety gloves are intended to protect hands...

  • Page 28: Spare Parts

    Ä Chapter 7.3 “Operating the valve in Please see an emergency” on page 65 for information on storing spare parts. Ordering spare parts Order spare parts from Stahl-Armaturen PERSTA GmbH, with specification of valve type, Year of manufacture, Nominal diameter,...

  • Page 29: Environmental Protection

    Safety Environmental protection 2.11 Environmental protection ENVIRONMENT! Hazards for the environment due to improper handling of environmentally-harmful sub- stances! If environmentally-harmful substances are handled incorrectly, particularly if they are disposed of incorrectly, significant environmental damage can occur. – Always comply with the instructions cited below for handling and disposal of environmentally- harmful substances.
  • Page 30 Safety Environmental protection Gate valves GJ, HJ, JJ and JN 20.05.2021...

  • Page 31: Functional Description

    Functional description Operating principle of the gate valve Functional description 3.1 Operating principle of the gate valve Actuator (in the example: handwheel) Stem Bonnet Gland packing Pressure sealing bonnet Body Shut-off element (in the example: flexible discs) In the closed state the shut-off element (Fig. 7/7) prevents the medium flowing through the valve.

  • Page 32: External Seal

    Functional description External seal 3.2 External seal Gland packing The gland packing seals the stem off from the environment. The gland follower flange (Fig. 8/1) is pressed onto the sealing ele- ments using stud bolts (Fig. 8/2): Gland follower Chamber ring Packing ring The resulting transverse deformation and the axial tensioning of the packing rings causes the stem to be sealed off from the...
  • Page 33 Functional description External seal Cover gasket There is a sealing element (Fig. 9/1) between the body and the body cover to prevent the pipeline medium from escaping from the body. If leaks occur, the sealing element can be replaced by employees of the operating company ( Ä...

  • Page 34: Versions Of The Gate Valve

    Functional description Versions of the gate valve > Actuator variants 3.3 Versions of the gate valve 3.3.1 Shut-off element A shut-off element (Fig. 10/1–3) is fastened to the lower end of the stem, and is guided into the body via grooves or strips. In the closed position the shut-off element seals the flow passage in the body and prevents the medium from flowing through.
  • Page 35 Functional description Versions of the gate valve > Actuator variants See the scope of delivery of the valve for additional information. Manual actuator (handwheel) The stem is driven manually with the handwheel. The handwheel can be attached in the following manner: direct attachment bevel gearbox with handwheel spur gear unit with handwheel...
  • Page 36 Functional description Versions of the gate valve > Actuator variants Electric actuator With the optional electric actuator the stem is driven via an electric motor. The electric motor is connected to the valve above the bonnet. The electric actuator is adjusted in the close and open direction via limit switches by the manufacturer.
  • Page 37 Functional description Versions of the gate valve > Actuator variants Hydraulic actuator With the optional hydraulic actuator the stem is driven via a hydraulic piston actuator. The hydraulic actuator is connected to the valve above the bonnet. Fig. 13: Hydraulic actuator 20.05.2021 Gate valves GJ, HJ, JJ and JN...

  • Page 38: Display Elements

    Functional description Versions of the gate valve > Display elements Pneumatic actuator With the optional pneumatic actuator the stem is driven via a pneu- matic piston actuator. The pneumatic actuator is connected to the valve above the bonnet. Fig. 14: Pneumatic actuator 3.3.3 Display elements Position indicator (visualised) An electrical position indicator (limit switch or inductive proximity...

  • Page 39: Connections

    Functional description Versions of the gate valve > Connections 3.3.4 Connections Connection in the pipe Valves can be mounted in the pipe as Butt-weld valves Flanged valves Special connection valves Electrical connections A connection for the customer-provided power supply is provided on the electric actuator.
  • Page 40 Functional description Versions of the gate valve > Connections Optional connection for external safety devices Depending on the application, the valve (Fig. 15/1) may need to be equipped with an external overpressure safety device by the oper- ating company. In this regard, the valve can be delivered with a factory-sealed nozzle by the manufacturer (Fig.

  • Page 41: Transport And Storage

    Transport and storage Safety instructions for transport and storage Transport and storage 4.1 Safety instructions for transport and storage Heavy weight of the valve WARNING! Risk of injury due to the heavy weight of the valve! The heavy weight of the valve, and of its compo- nents, can result in severe injuries.

  • Page 42: Transport Of Packages

    Transport and storage Transport of packages 4.2 Transport of packages Depending on the size, valves are delivered individually or on a pallet. Transporting individual valves Personnel: Trained person (hoist) Protective equipment: Industrial hard hat Protective gloves Safety footwear Special tool: Sling gear Hoist DANGER!

  • Page 43: Storage Of The Valve

    Transport and storage Storage of spare parts 4.3 Storage of the valve Storage requirements Store a valve under the following conditions: Store valve in closed status (delivery status). Do not store outdoors. Store it in a dry and dust-free environment. Do not expose it to any aggressive media.
  • Page 44 Transport and storage Storage of spare parts Gate valves GJ, HJ, JJ and JN 20.05.2021...

  • Page 45: Installation

    Installation Safety instructions for installation Installation 5.1 Safety instructions for installation Electric current (in versions with electric actuator) DANGER! Risk of fatal injury due to electric current! There is a risk of fatal injury when touching live components of the actuator. Switched-on electrical components can perform uncontrolled movements and cause serious injuries.
  • Page 46 Installation Safety instructions for installation Faulty installation WARNING! Risk of injury due to incorrectly installed valve! A faulty installation can cause injuries or result in the malfunction of the gate valve. – Pay attention to the flow direction of valves. –...

  • Page 47: Before The Installation

    – Do not unscrew threaded connections on the valve. – For maintenance tasks or when unscrewing threaded connections, contact – Stahl-Armaturen PERSTA GmbH customer service (contact details p. 3) to request the tightening torques, specifying the serial number, or – refer to the manufacturer’s website (address on page 2).

  • Page 48: Installing The Valve

    Installation Attaching additional safety devices 5.3 Installing the valve Personnel: Pipeline engineer Trained person (hoist) Protective equipment: Protective work clothing Protective gloves Industrial hard hat Safety footwear Special tool: Sling gear Hoist Prepare the respective pipe section for the installation. Use a hoist to bring the valve into the installation position.

  • Page 49: For Electric Actuator: Connecting The Power Supply

    Installation For hydraulic actuator: connecting the hydraulic system 5.5 For electric actuator: connecting the power supply Personnel: Qualified electrician Protective equipment: Protective work clothing Safety footwear Requirement: Ensure that the customer-provided power supply is switched off and safeguarded against being switched on again. Terminal diagram and operating manual are located on the actuator.

  • Page 50: For Pneumatic Actuator: Connecting The Pneumatic System

    Installation After the installation 5.7 For pneumatic actuator: connecting the pneumatic system Personnel: Pneumatics Specialist Protective equipment: Safety goggles Protective work clothing Safety footwear Switch off the customer-provided pneumatic supply and safe- guard it from being switched on again. Connect the pneumatic actuator of the valve to the customer- provided pneumatic supply in accordance with the provided connection plan.

  • Page 51: Pickling The Valve

    Installation After the installation > Painting the valve WARNING! Anticorrosive is a health hazard! Direct contact with the anticorrosive used can have health implications. – Handle anticorrosive in accordance with the instructions in the manufacturer’s safety data sheet. – Wear protective equipment: Protective gloves, safety footwear, protective goggles, protective work clothing.

  • Page 52: Performing A System Pressure Test And Leak Test

    Installation After the installation > Applying thermal insulation 5.8.3 Performing a system pressure test and leak test Alternating flow direction WARNING! Risk of injury from alternating flow direction! When protecting the valve with: – an equalizing pipe – a bore in the disc or –...
  • Page 53 Installation After the installation > Applying thermal insulation Personnel: Pipeline engineer Protective equipment: Safety goggles Protective work clothing Protective gloves Safety footwear If necessary, have the thermal insulation fitted by the oper- ating company. Ensure that all operating elements, as well as gland seal areas and overpressure safety devices remain permanently accessible and controllable.
  • Page 54 Installation After the installation > Applying thermal insulation Gate valves GJ, HJ, JJ and JN 20.05.2021...

  • Page 55: Commissioning

    Commissioning Safety instructions for commissioning Commissioning 6.1 Safety instructions for commissioning Danger of freezing WARNING! Danger of injury due to pipes shattering at freezing temperatures! As a result of pipes shattering at freezing tempera- tures, severe injuries can be caused by fluid under high pressure.
  • Page 56 Commissioning Safety instructions for commissioning Pipeline medium WARNING! Risk of injury due to pressurised pumped medium! Depending on the version of the valve, injuries can be caused by the medium escaping under pres- sure, irrespective of whether the system is in ope- ration or not.
  • Page 57 Commissioning Safety instructions for commissioning Danger of injury due to misuse WARNING! Danger of injury due to force-increasing objects! By using force-increasing objects (rods/tubes) as levers for actuating the handwheel, injuries can occur due to damage of components in the force flux.

  • Page 58: Prior To Commissioning

    Commissioning Prior to commissioning 6.2 Prior to commissioning Personnel: Pipeline engineer Protective equipment: Industrial hard hat Safety goggles Protective work clothing Protective gloves Safety footwear Requirements: The entire plant must be released for operation. Valve with manual actuator Fully open the valve by turning the handwheel counterclock- wise (Fig.

  • Page 59: Carrying Out The Commissioning Process

    Commissioning Carrying out the commissioning process 6.3 Carrying out the commissioning process Personnel: Pipeline engineer Industrial mechanic (for valves within the normal pressure range) Protective equip- Industrial hard hat ment: Safety goggles Protective work clothing Protective gloves Safety footwear Requirements: The entire plant must be released for operation.
  • Page 60 Commissioning Carrying out the commissioning process Gate valves GJ, HJ, JJ and JN 20.05.2021...

  • Page 61: Operation

    Operation Safety instructions for operation Operation 7.1 Safety instructions for operation Thermal dangers WARNING! Danger of injury due to high/low temperatures! Depending on the insert of the valve or of the pipe, injuries can occur due to the high or low tempera- ture of the components.
  • Page 62 Operation Safety instructions for operation Failure to comply with the heating- up times/cooling times WARNING! Danger of injury due to failure to comply with the heating-up times/cooling times! Insufficient heating-up times/cooling times may lead to impermissible deformations of the valve and reduction of the total service life.

  • Page 63: Operating The Valve

    Operation Operating the valve > Valve with electric actuator 7.2 Operating the valve 7.2.1 Valve with manual actuator (handwheel) Personnel: Industrial mechanic (for valves within the normal pressure range) Trained person (operator) Protective equip- Industrial hard hat ment: Safety goggles Protective work clothing Protective gloves Safety footwear...

  • Page 64: Valve With Hydraulic Or Pneumatic Actuator

    Operation Operating the valve > Valve with hydraulic or pneumatic actuator 7.2.3 Valve with hydraulic or pneumatic actuator The valve is operated by the higher-level control system or the local control system. See the scope of delivery of the valve for additional information.

  • Page 65: Operating The Valve In An Emergency

    Operation Operating the valve in an emergency > Valve with manual actuator (handwheel) 7.3 Operating the valve in an emergency 7.3.1 Valve with manual actuator (handwheel) Comply with the operating company’s instructions concerning behaviour in the event of an emer- gency.

  • Page 66: Valve With Electric Actuator

    Operation Operating the valve in an emergency > Valve with hydraulic or pneumatic actuator 7.3.2 Valve with electric actuator Coupling/uncoupling the handwheel See the operating manual of the actuator for infor- mation on coupling and uncoupling the handwheel for operating the valve in an emergency. Personnel: Industrial mechanic (for valves within the normal pressure range)

  • Page 67: Maintenance

    Maintenance Safety instructions for maintenance Maintenance 8.1 Safety instructions for maintenance Safeguard against restart DANGER! Life-threatening danger due to unintended restart! The unauthorised switch-on of the energy supply during work poses a danger of severe or fatal inju- ries for persons in the danger zone. –...
  • Page 68 Maintenance Safety instructions for maintenance Pressurised components WARNING! Danger of injury due to pressurised compo- nents! Tasks on pressurised components can result in serious injuries. – Establish depressurised status before working on the valve. Heavy weight of the valve WARNING! Danger of injury due to the heavy weight of the valve! The heavy weight of the valve, and of its compo-...
  • Page 69 – Only use original spare parts from Stahl-Arma- turen PERSTA GmbH or spare parts approved by Stahl-Armaturen PERSTA GmbH. – If you have any questions or if anything is unclear, always contact our customer service organisation (contact details on page 3).
  • Page 70 Maintenance Safety instructions for maintenance Pipeline medium WARNING! Risk of injury due to pressurised pumped medium! Depending on the version of the valve, injuries can be caused by the medium escaping under pres- sure, irrespective of whether the system is in ope- ration or not.

  • Page 71: Maintenance Schedule

    If regular inspections indicate increased wear, the required mainte- nance intervals must be reduced in accordance with the actual signs of wear. For questions concerning maintenance tasks and intervals, contact Stahl-Armaturen PERSTA GmbH customer service. Interval Maintenance work...

  • Page 72: Maintenance Tasks

    Maintenance Maintenance tasks > Visually checking the valve 8.3 Maintenance tasks 8.3.1 Visually checking the valve Personnel: Trained person (operator) Protective equipment: Industrial hard hat Safety goggles Protective work clothing Protective gloves Safety footwear Check the gland seal for leaks. Check the cover for leaks.

  • Page 73: Replacing The Gland Packing And Cover Gasket

    Maintenance Maintenance tasks > Replacing the gland packing and cover gasket 8.3.2 Replacing the gland packing and cover gasket Personnel: Industrial mechanic (for valves within the normal pressure range) Protective equip- Industrial hard hat ment: Safety goggles Protective work clothing Protective gloves Safety footwear Special tool:...
  • Page 74 Maintenance Maintenance tasks > Replacing the gland packing and cover gasket Turn the handwheel (Fig. 22/1) in the closing direction, until the threaded bush is screwed down from the stem thread. ð The bonnet lifts off of the body (Fig. 22). Remove the cover, along with the gland follower flange, upwards from the stem.
  • Page 75 Maintenance Maintenance tasks > Replacing the gland packing and cover gasket Removing the cover gasket Remove the gasket (Fig. 24/1) from the groove (Fig. 24/2) in the body. Fig. 24: Replacing the gasket Cleaning Completely remove any residue from the cover gasket. Completely remove any residue from the gland packing.
  • Page 76 Maintenance Maintenance tasks > Replacing the gland packing and cover gasket Attach the gland follower flange (Fig. 25/1) to the eyebolts (Fig. 25/2). Fig. 25: Attaching the gland follower flange Attach the cover, along with the gland follower flange, onto the stem (Fig.
  • Page 77 Maintenance Maintenance tasks > Replacing the gland packing and cover gasket Turn the handwheel (Fig. 27/1) in the opening direction, until the threaded bush is screwed onto the stem thread. Make sure that the cover is resting flat on the body. Fig.

  • Page 78: Lubricating Moving Parts (Stem Thread)

    Maintenance Maintenance tasks > Lubricating moving parts (stem thread) 8.3.3 Lubricating moving parts (stem thread) Personnel: Trained person (operator) Protective equipment: Industrial hard hat Safety goggles Protective work clothing Protective gloves Safety footwear Prerequisites: The valve must be cooled/heated-up to ambient temperature. Depressurised status must have been established.

  • Page 79: Faults And Troubleshooting

    Faults and troubleshooting Safety instructions for fault correction Faults and troubleshooting 9.1 Safety instructions for fault correction Electric current (in versions with electric actuator) DANGER! Risk of fatal injury due to electric current! There is a risk of fatal injury when touching live components of the actuator.
  • Page 80 – the valve is depressurised – the valve has cooled-down/warmed-up to ambient temperature. – If in doubt, obtain the assistance of experienced persons or contact Stahl-Armaturen PERSTA GmbH Customer Service. – Comply with the following before restarting the plant: – Ensure that all fault correction tasks have...
  • Page 81 Faults and troubleshooting Safety instructions for fault correction Pipeline medium WARNING! Risk of injury due to pressurised pumped medium! Depending on the version of the valve, injuries can be caused by the medium escaping under pres- sure, irrespective of whether the system is in ope- ration or not.

  • Page 82: Fault Table

    Faults and troubleshooting Fault table Liquid under high pressure (in ver- sions with hydraulic actuator) WARNING! Risk of injury due to hydraulic energy! Hydraulically-powered components of the valve, as well as the triggering of the overpressure valve, can cause severe injuries. –...
  • Page 83 Faults and troubleshooting Fault table Fault descrip- Cause Remedy Personnel tion End position of Incorrect actuator setting Set the actuator correctly. Industrial mechanic the actuator not (for valves within the reached normal pressure range) Valve bearing, stem thread, lift Replace the damaged parts. Industrial mechanic stop or inner parts of the valve (for valves within the...
  • Page 84 Malfunction of End contacts are defective Have the end contacts checked. Qualified electrician the valve Prior to readjustment consult with Stahl-Armaturen PERSTA GmbH customer service. Torque switch is defective Have the torque switch checked. Qualified electrician Prior to readjustment consult with Stahl-Armaturen PERSTA GmbH customer service.

  • Page 85: Dismantling, Disposal

    – Secure the components so that they do not fall down or fall over. – If anything is unclear obtain the assistance of Stahl-Armaturen contact PERSTA GmbH cus- tomer service (contact details p. 3). 20.05.2021 Gate valves GJ, HJ, JJ and JN...
  • Page 86 Dismantling, disposal Safety instructions for dismantling Heavy weight of the valve WARNING! Danger of injury due to the heavy weight of the valve! The heavy weight of the valve, and of its compo- nents, can result in severe injuries. – Transport valves with a suitable hoist or forklift. –...
  • Page 87 Dismantling, disposal Safety instructions for dismantling Liquid under high pressure (in ver- sions with hydraulic actuator) WARNING! Risk of injury due to hydraulic energy! Hydraulically-powered components of the valve, as well as the triggering of the overpressure valve, can cause severe injuries. –...

  • Page 88: Dismantling

    Dismantling, disposal Dismantling WARNING! Pumping medium is a health hazard! Contact with the pumping medium can have health implications. – Handle pumping medium in accordance with the instructions in the manufacturer’s safety data sheet. – Wear protective equipment: Protective gloves, safety footwear, protective goggles, protective work clothing.

  • Page 89: Disposal

    Dismantling, disposal Disposal For electric actuator: – Power supply is switched off and physically disconnected. For hydraulic or pneumatic actuator: – Ensure that the customer-provided hydraulic/pneumatic supply is switched off and safeguarded against being switched on again. – Hydraulic lines/pneumatic lines are in a depressurised state. –...
  • Page 90 Dismantling, disposal Disposal Gate valves GJ, HJ, JJ and JN 20.05.2021...

  • Page 91: Index

    Index Index Overview ......36 Emergency ......22, 65 Abrasion .
  • Page 92 Index Preparing for the installation ....47 Protective equipment ....26 Leak test .
  • Page 93 Index Pickling ......51 Storing ......43 Use .

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