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PERSTA DVA 200 BZ Operating Instructions Manual

High pressure globe valve
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Operating instructions
High pressure globe valve
DVA and DVR
Read the instructions prior to performing any task!

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  • Page 1 Operating instructions High pressure globe valve DVA and DVR 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. 6404.DE.STD.03.2013, 2, en_GB © Stahl-Armaturen PERSTA GmbH 2013 High pressure globe valve DVA and DVR 20.05.2021...
  • Page 3 Supplemental directives Information about the operating These instructions enable the safe and efficient handling of the manual high pressure valve. The manual is a component of the product and must be kept in the vicinity of the high pressure valve where it is available to personnel at all times.
  • 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 Telephone: +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............13 2.5 Residual risks............. 14 2.5.1 Basic dangers at the workplace....... 14 2.5.2 Electric shock hazard..........15 2.5.3 Danger due to hydraulics.........
  • Page 6 Table of contents 5.6 For a pneumatic actuator, connecting the pneumatic system................ 43 5.7 After the installation............ 44 5.7.1 Pickling the valve............. 45 5.7.2 Painting the valve............ 45 5.7.3 Executing the system pressure test and leak test... 45 5.7.4 Applying thermal insulation........46 Commissioning..............

  • Page 7: Overview

    Overview Overview Fig. 1: High pressure globe valve (shown: model DVA) Actuator (in the example: handwheel) Gland packing Stem Cover Anti-twist device Shut-off element (shown here: throttling valve Bonnet cone) Gland follower flange Body Brief description The valve designated as high pressure globe valve is designed for installation in pipes.
  • Page 8 Overview Actuator variants The stem is moved differently depending on the version: manually via handwheel electrically hydraulically pneumatically Media Depending on the version of the high pressure globe valve, it can be used for water, steam, oil, and other non-aggressive media. Tools The following tools are required for the tasks described in the oper- ating instructions:...

  • 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 High pressure globe valves of the specified DVA and DVR series are designed for installation in pipes under the following condi- tions: Valve with throttling valve cone: Normal operation of the valve as open/close valve. Brief operation of the valve as throttling valve with increased probability of wear.

  • Page 12: Safety Signs

    Safety Safety signs Misuse WARNING! Danger in the event of misuse! Misuse of the valve can cause dangerous situa- tions. – Do not use the valve as a throttling valve in normal operation. – Connect the pipes so that they are free of ten- sion.

  • Page 13: Safety Devices

    Safety Safety devices Flow direction arrow The flow direction is marked on the valve with an arrow (Fig. 2/1). In the arrow direction, medium flows against the shut-off element Ä Chapter 2.2 “Intended use” on page 11). from above ( Fig.

  • Page 14: Residual Risks

    Safety Residual risks > Basic dangers at the workplace Torque switch With an optional electric actuator, in addition to the limit switch, torque switches are also mounted. At a permanently set torque, the actuator shuts down and the valve is closed. This protects the valve from excessive torque.

  • Page 15: Electric Shock Hazard

    Safety Residual risks > Danger due to hydraulics 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 16: Hazards Associated With The Pneumatic System

    Safety Residual risks > Mechanical hazards 2.5.4 Hazards associated with the pneumatic system 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. – Only have pneumatic specialists perform tasks on the pneumatic equipment.

  • Page 17: 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 18 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 19 Safety Residual risks > Dangers due to hazardous substances and operating materials Anticorrosive 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.

  • Page 20: Behaviour In The Event Of An Emergency

    Safety Responsibility of the operating company 2.6 Behaviour in the event of an emergency Ä Chapter 7.3 “Operating the valve in an emergency” See also on page 57. Shut off the pipe sections affected. Comply with the in-house regulations. 2.7 Responsibility of the operating company Operating company The operating company is the company that operates the valve for commercial or economic purposes itself or that provides it to a third...

  • Page 21: Personnel Requirements

    Safety Personnel requirements The operating company must provide equipment that can com- pletely drain the pipe sections in which the valve is installed as well as the valve itself. The operating company must ensure that all personnel who are to handle the valve have read and understood this manual. In addition, the operating company must train the personnel and inform them of the hazards at regular intervals.
  • Page 22 Safety Personnel requirements Forklift truck driver The forklift truck driver has demonstrated to the operator their skills in driving industrial trucks controlled by a sitting or standing oper- ator and has been assigned to do this by the operator in writing. Hydraulics Specialist The Hydraulics Specialist is trained for the special area of respon- sibility he is involved with and knows the relevant standards and...
  • Page 23 Safety Personnel requirements Trained person (operator) The trained person (operator) has been instructed, and can provide evidence of this, by the operating company on how to handle the plant and the potential hazards associated with improper behav- iour. This knowledge will be refreshed in regular training provided by the operating company.

  • Page 24: Personal Protective Equipment

    Safety Personal protective equipment 2.9 Personal protective equipment Personal protective equipment is used to protect personnel from impairments to health and safety at work. 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.

  • Page 25: Spare Parts

    Storage of spare parts Ä Chapter 4.4 “Storage of spare parts” Please see on page 37 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 26: 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 27: Functional Description

    Functional description Mode of operation of the high pressure globe valve Functional description 3.1 Mode of operation of the high pressure globe valve Fig. 5: High pressure globe valve (shown: Model DVA) Actuator (shown here: Handwheel) Bonnet Anti-twist device Stem Gland follower flange Gland packing Cover...

  • Page 28: Seal To The Outside

    Functional description Seal to the outside Type of connection, Shape of the body. Moreover it is possible that the valve has display elements. 3.2 Seal to the outside Gland packing The gland packing seals the stem against the environment. For this the gland follower flange (Fig. 6/1) is pressed onto the sealing elements using stud bolts (Fig.

  • Page 29: Versions Of The High Pressure Globe Valve

    Functional description Versions of the high pressure globe valve > Shut-off element variants Pressure sealing bonnet The body is sealed against the environment via the pressure sealing bonnet. An axial force is generated through the internal pressure in the body. This axial force acts on the elastic gasket ring (Fig. 7/3) via the cover (Fig.

  • Page 30: Actuator Variants

    Functional description Versions of the high pressure globe valve > Actuator variants Regulating cone The regulating cone (Fig. 8/2) is used, if a valve is used to regulate the mass flow. Depending on the position of the shut-off element pumping medium flows through the openings in the lower area of the cone.
  • Page 31 Functional description Versions of the high pressure globe valve > Actuator variants Electric actuator With the optional electric actuator (Fig. 10) 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 32: Body Shape

    Functional description Versions of the high pressure globe valve > Connections 3.3.3 Body shape Angle pattern valve For the version of the valve as an angle pattern valve, the inlet side is arranged at a right angle to the outlet side. T-pattern valve For the T-pattern valve the stem position is vertical.
  • Page 33 Functional description Versions of the high pressure globe valve > Connections Information on connection is provided in the oper- ating manual for the electric actuator. Hydraulic connections Connections for the customer-provided hydraulic supply are pro- vided on the flanges or on the control valves on the hydraulic piston actuator.
  • Page 34 Functional description Versions of the high pressure globe valve > Connections High pressure globe valve DVA and DVR 20.05.2021...

  • Page 35: Transport And Storage

    Transport and storage Safety notices for transport and storage Transport and storage 4.1 Safety notices for transport and storage Danger of injury due to the 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.

  • Page 36: 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 37: Storage Of The Valve

    Transport and storage Storage of spare parts 4.3 Storage of the valve Storage of the valve Store valves under the following conditions: Store valve in closed status (delivery status). Do not store outdoors. Store in a dry and dust-free location. Do not expose to any aggressive media.
  • Page 38 Transport and storage Storage of spare parts High pressure globe valve DVA and DVR 20.05.2021...

  • Page 39: Installation

    Installation Safety notices for installation Installation 5.1 Safety notices for installation Electric shock DANGER! Risk of fatal injury from electric shock! There is a risk of fatal injury when touching live components of the actuator. Switched-on electrical components can execute uncontrolled movements and can cause serious injuries.
  • Page 40 – 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 41: Before The Installation

    Installation Installing the valve Faulty alignment of the valve NOTICE! Malfunction of the valve due to failure to comply with the flow direction! Faulty alignment can result in malfunctions of the overall system. – Install the valve in accordance with the flow Ä...

  • Page 42: For Electric Actuators, Connect The Power Supply

    Installation For electric actuators, connect the power supply Ensure that the customer-provided pipes are free of external forces and torques. Check butt-welding ends and flange sealing surfaces for damage and cleanliness. Centre the connection flange. Use connection elements and sealing elements made of per- missible materials.

  • Page 43: For A Hydraulic Actuator, Connecting The Hydraulic System

    Installation For a pneumatic actuator, connecting the pneumatic system 5.5 For a hydraulic actuator, connecting the hydraulic system Personnel: Hydraulics Specialist Protective equipment: Safety goggles Protective work clothing Safety footwear Switch off the customer-provided hydraulic supply and safe- guard it from being switched on again. Connect the hydraulic actuator of the valve to the customer- provided hydraulic supply in accordance with the provided connection plan.

  • Page 44: After The Installation

    Installation After the installation 5.7 After the installation Harmful substances WARNING! Pickling medium is a health hazard! Direct contact with the pickling medium used can have health implications. – Handle pickling medium in accordance with the instructions in the manufacturer’s safety data sheet.

  • Page 45: Pickling The Valve

    Installation After the installation > Executing the system pressure test and leak test 5.7.1 Pickling the valve It is possible to pickle the valve in many ways. Ensure that the operating company’s specialised personnel pickle the valve. Personnel: Pipeline engineer Protective equipment: Safety goggles Protective work clothing...

  • Page 46: Applying Thermal Insulation

    Installation After the installation > Applying thermal insulation 5.7.4 Applying thermal insulation System-specific equipment Depending on the system, it may be necessary to equip the pipe or the valve with 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-...

  • Page 47: Commissioning

    Commissioning Safety notices for commissioning Commissioning 6.1 Safety notices 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 48 Commissioning Safety notices for commissioning 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 49 – 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 50: 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 Prerequisites: The overall system must be released for operation. Valve with manual actuator Fully open the valve by turning the handwheel counterclock- wise (Fig.

  • Page 51: Executing The Commissioning Process

    Commissioning Executing the commissioning process 6.3 Executing the commissioning process Personnel: Pipeline engineer Industrial mechanic (high pressure valves) Protective equip- Industrial hard hat ment: Safety goggles Protective work clothing Protective gloves Safety footwear Prerequisites: The overall system must be released for operation. WARNING! Failure to comply with the heating-up times/cooling times!
  • Page 52 Commissioning Executing the commissioning process High pressure globe valve DVA and DVR 20.05.2021...

  • Page 53: 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 54 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 55: 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 (high pressure valves) Trained person (operator) Protective equip- Industrial hard hat ment: Safety goggles Protective work clothing Protective gloves Safety footwear Activate handwheel on the valve: Turn clockwise (Fig.

  • Page 56: 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 57: 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 58: 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 (high pressure valves)

  • Page 59: 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 60 Maintenance Safety instructions for maintenance Improperly executed maintenance tasks WARNING! Danger of injury due to improperly executed maintenance tasks! Improper maintenance can cause severe injury or significant material damage. – Before starting tasks: – ensure that there is adequate free space for installation, –...
  • Page 61 Maintenance Safety instructions for maintenance 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 62 – 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 63 Maintenance Safety instructions for maintenance Pumping medium WARNING! Danger of injury due to pumping medium under pressure! In operating status, as well as in decommissioned status, depending on the version of the valve, inju- ries can occur due to medium escaping under high pressure.
  • Page 64 Maintenance Safety instructions for maintenance Damage of sealing surfaces and slide faces NOTICE! Damage of sealing surfaces and slide faces due to the metallic processing of sealing sur- faces and slide faces! The metallic processing of sealing surfaces and slide faces and valve parts can cause material damage and valve malfunction.

  • Page 65: Maintenance Schedule

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

  • Page 66: Maintenance Tasks

    Maintenance Maintenance tasks > Lubricating moving parts (stem thread) 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 stuffing box for leaks. Check the cover for leaks.
  • Page 67 Maintenance Maintenance tasks > Lubricating moving parts (stem thread) Depending on the version: Grease the stem thread with a brush. Grease stem thread and bearing via lubricating nipple (Fig. 18). Completely close valve. Repeat step 4–6 several times. Comply with the instructions in the manufac- turer’s documentation for the electric actuator.

  • Page 68: Replacing The Gland Packing

    Maintenance Maintenance tasks > Replacing the gland packing 8.3.3 Replacing the gland packing 8.3.3.1 Manual actuator Personnel: Industrial mechanic (high pressure valves) Trained person (hoist) Protective equip- Industrial hard hat ment: Safety goggles Protective work clothing Protective gloves Safety footwear Special tool: Hoist Packing extractor...
  • Page 69 Maintenance Maintenance tasks > Replacing the gland packing WARNING! Danger of injury due to pressurised valve! Loosen and remove the nuts (Fig. 20/1) on the bonnet. Loosen and remove the nuts (Fig. 20/3) including washers on the gland follower flange. Activate the handwheel in the close direction ( Ä...
  • Page 70 Maintenance Maintenance tasks > Replacing the gland packing Execute concluding tasks Attach the gland follower flange (Fig. 22/1) and bolt on uni- formly with nuts (Fig. 22/2) as specified by the manufacturer. Fig. 22: Mounting the gland follower flange High pressure globe valve DVA and DVR 20.05.2021...
  • Page 71 Maintenance Maintenance tasks > Replacing the gland packing Mount the bonnet (Fig. 23/1) and the anti-twist device (Fig. 23/2). WARNING! Danger of injury due to the wrong tightening torque! Attach the fastening screws (Fig. 23/3) of the bonnet and tighten in a cross pattern as specified by the manufacturer. Fig.
  • Page 72 Maintenance Maintenance tasks > Replacing the gland packing 8.3.3.2 Electric, pneumatic or hydraulic actuator The procedure for an electric actuator is described below. Comply with the instructions in the documentation provided by the manufacturer for mounting and dismounting the pneumatic or hydraulic actuator. Obtain the assistance of specialised pneumatic or hydraulic personnel.
  • Page 73 Maintenance Maintenance tasks > Replacing the gland packing Unscrew the fastening screws (Fig. 25/2) of the electric actuator (Fig. 25/1) and remove them together with the washers. Take off the electric actuator (Fig. 25/1) and store it outside of the work area. Fig.
  • Page 74 Maintenance Maintenance tasks > Replacing the gland packing Insert the feather key (Fig. 27/2) into the feather key groove (Fig. 27/3) on the hub (Fig. 27/1). See the manufacturer’s documentation for the attachment points on the electric actuator. Have a second person or use a hoist and suitable sling gear to position the electric actuator above the flange on the bonnet.

  • Page 75: Replacing The Gasket Of The Pressure Sealing Bonnet

    Maintenance Maintenance tasks > Replacing the gasket of the pressure sealing bonnet 8.3.4 Replacing the gasket of the pressure sealing bonnet Personnel: Industrial mechanic (high pressure valves) Trained person (hoist) Protective equip- Industrial hard hat ment: Safety goggles Protective work clothing Protective gloves Safety footwear Special tool:...
  • Page 76 Maintenance Maintenance tasks > Replacing the gasket of the pressure sealing bonnet Using the pin puncher, punch the segments (Fig. 30/2) into the interior and through the outer ejection bores (Fig. 30/1). Remove the segments (Fig. 30/2). Place the bonnet with threaded bush on the stem (turn). Place two segments between body and bonnet.
  • Page 77 Maintenance Maintenance tasks > Replacing the gasket of the pressure sealing bonnet Lift the support ring upwards (Fig. 32/3) off of the cover (Fig. 32/1). Lift the gasket ring upwards (Fig. 32/2) off of the cover (Fig. 32/1). Carefully remove the residues of the gasket ring. NOTICE! Material damage due to the mechanical processing of support surfaces!
  • Page 78 Maintenance Maintenance tasks > Replacing the gasket of the pressure sealing bonnet Insert segments (Fig. 34/2) into the body groove (Fig. 34/1). Fig. 34: Inserting segments High pressure globe valve DVA and DVR 20.05.2021...
  • Page 79 Maintenance Maintenance tasks > Replacing the gasket of the pressure sealing bonnet If present, place the clamping lid (Fig. 35/2) on from above. WARNING! Danger of injury due to the wrong tight- ening torque! Screw the clamping lid (Fig. 35/2) in a cross pattern with nuts (Fig.

  • Page 80: Dismounting And Checking The Stem

    Maintenance Maintenance tasks > Dismounting and checking the stem 8.3.5 Dismounting and checking the stem Personnel: Industrial mechanic (high pressure valves) Trained person (hoist) Protective equip- Industrial hard hat ment: Safety goggles Protective work clothing Protective gloves Safety footwear Special tool: Sling gear Hoist Carry out work steps 1–10 of the maintenance task...

  • Page 81: After Maintenance

    Maintenance After maintenance 8.4 After maintenance Executing final tests after replace- ment Personnel: Industrial mechanic (high pressure valves) Protective equip- Industrial hard hat ment: Safety goggles Protective work clothing Protective gloves Safety footwear Prerequisite: Maintenance tasks are concluded. Charge the valve with permissible test pressure. Ensure that the valve does not leak.
  • Page 82 Maintenance After maintenance High pressure globe valve DVA and DVR 20.05.2021...

  • Page 83: Faults And Fault Correction

    Faults and fault correction Safety notices for fault correction Faults and fault correction 9.1 Safety notices for fault correction Electric shock DANGER! Risk of fatal injury from electric shock! There is a risk of fatal injury when touching live components of the actuator. Switched-on electrical components can execute uncontrolled movements and can cause serious injuries.
  • Page 84 – 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 system: – Ensure that all fault correction tasks have...
  • Page 85 Faults and fault correction Safety notices for fault correction Pumping medium WARNING! Danger of injury due to pumping medium under pressure! In operating status, as well as in decommissioned status, depending on the version of the valve, inju- ries can occur due to medium escaping under high pressure.

  • Page 86: Fault Table

    Faults and fault correction Fault table Fluid under high pressure WARNING! Danger 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. – Only have specialised personnel perform tasks on the hydraulic system.
  • Page 87 Torque switch is defective Have the torque switch checked. Qualified electri- Prior to readjustment consult with cian Stahl-Armaturen PERSTA GmbH customer service. Incorrect actuator adjust- Correctly adjust the actuator. Industrial mechanic ment: Shut-off element (high pressure...
  • Page 88 Have the limit switch checked. Prior Qualified electri- valve electric, pneumatic or to readjustment consult with Stahl- cian hydraulic actuator) is Armaturen PERSTA GmbH customer defective service. Torque switch (for Have the torque switch checked. Qualified electri- optional electric, pneu-...

  • Page 89: 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 High pressure globe valve DVA and DVR...
  • Page 90 Dismantling, disposal Safety notice for dismantling and disposal 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. –...
  • Page 91 Dismantling, disposal Safety notice for dismantling and disposal 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. – Only have pneumatic specialists perform tasks on the pneumatic equipment. –...

  • Page 92: Dismantling

    Dismantling, disposal Dismantling 10.2 Dismantling Personnel: Industrial mechanic (high pressure valves) Forklift truck driver Trained person (operator) Trained person (hoist) Disposal contractor Protective equip- Industrial hard hat ment: Safety goggles Protective work clothing Protective gloves Safety footwear Special tool: Hoist Sling gear Prerequisites: The pipe section in question is shut-off.

  • Page 93: Disposal

    Dismantling, disposal Disposal 10.3 Disposal If a return or disposal agreement has not been concluded, then recycle dismantled components: Scrap metals. Recycle plastic elements. Sort and dispose of all other components according to material condition. ENVIRONMENT! Hazards for the environment due to improper disposal! Hazards for the environment can occur due to improper disposal.
  • Page 94 Dismantling, disposal Disposal High pressure globe valve DVA and DVR 20.05.2021...

  • Page 95: Index

    Index Index Abrasion ......66 Fault table ......86 Actuator .
  • Page 96 Index Lubricating bearing ..... . 66 Regulating cone ......30 Lubricating nipple .
  • Page 97 Index Visually checking the valve ....66 Valve transport ......36 Y-pattern valve .

This manual is also suitable for:

Dva 202 bzDva 204 bzDvr 210 kzDvr 212 kzDvr 214 kz

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