Operating Instructions ERU Knife Gate Valve K1
Contents
1. T T q FLANGE CONNECTING DIMENSIONS TO DIN 2532 PN 10 CONNECTING ELEMENTS FOR FLANGE CONNECTION TO DRAWING 46131899 FACE TO FACE DIMENSION EN558 1 BASIC SERIES 20 FORMER DIN3202 PART 3 SERIES K1 CHAIN WHEEL DRIVE SQUARE SOCKET SQUARE CAP D D Lu Z E 38 37 36 Lit X Zu i On zZ lt i o gt L U ao 59 T Zu lat CJ lt o gt LL ao 5 BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 12 19 Issue 11 02 Phone 07321 3200 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 Parts list for drawing 3E 60796 ERU Knife Gate Valve K1 with electric actuator Part Description 1 Body component 2 U shaped sealing 1 V1 element complete 3 Straightpin 4 Compressor 5 6 Locking washer 7 Gate Tt 8 9 10 11 Hexagon screw Cylindrical screw 12 Hexagon nut quantity is variable depending on the nominal size DN L Travel Turns Adjusted Travel torque Nm 400 102 908 561 TR28x5 LH 400 80 120 110 500 127 1118 666 TR30x6 LH 500 83 120 110 600 154 1322 780 TR36x6 LH 600 100 Closing Opening time in seconds at the following speeds of electr actuator of N Electric actuator D 200 A F14 250 max 120 NM D 120 A F10 max 120 NM 243 BA46E040 Erhard G2. re 1 Body component 2 20 sem E i Dn sienen complete Straight pin 22 Bush 3 4 aea Fo wer 57 5 Packingcord square 4 v1 24 Hexagonscrew 3 6 7 8 Profilerubber 2 v1 25 Washer 4 Gate 1 26 Hexagonnut 4 Washer 27 Handwheel 1 9 Hexagonscrew 28 Washer 1 10 Hxagonnut 29 Hexagonscew 1 11 Hexagon screw 30 Squarecap 1 ee Te raced pin 13 Washer 9J 82 14 Se e ae eee a 15 en oe 16 Studbolt 4 35 Chainguide 1 17 Bearinghub 1 36 Colarwasher 1 18 Scraperring _ 2 V 37 Straight grooved pin 1 19 Axial grooved ball 2 38 Hexagon screw bearing quantity is variable depending on the nominal diameter DN PONT CTR e IM c 919 307 00 102 1002 1016 1073 1024 26 500 127 1250 1265 1324 1277 666 500 412 377 35 600 154 1428 1442 1502 35 BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 10 19 Issue 11 02 Phone 07321 320 0 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 Drawing 3E 60795 ERU Knife Gate Valve K1 with chain wheel drive handwheel square muff square cap BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 11 19 Issue 11 02 Phone 07321 3200 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600
3. 2 20 Pistonrod 1 E heres TTR S element complete 4 Compressor 2 23 Washer 4 5 Packing cord square 4 v4 24 Cylindricalscrew 4 6 Profile rubber 2 v4 25 Washer _ 4 7 Gate 1 26 Cylindrical screw 4 8 Washer 27 Pistonnut 2 9 Hexagonscrew 28 v2 10 Hexagonnut_ 29 Centeringring 1 11 Hexagon screw 30 Gasket 2 v2 12 Hexagonnut_ 31 Tube cylinder 1 13 Washer 3 Threaded bot 8 14 Yoke 3 9 1 f 33 Sleeve 15 Bush 1 Tf 384 Cylindercover 1 16 Mountingflange 1 35 washer 8 17 Collarbush 1 36 Hexagonnut 8 18 Scraperring 1 37 Angular fiting 1 v2 19 0 ring quantity is variable depending on the nominal size DN Cylinder volume 400 102 1446 908 561 250 335 G1 2 19 8 500 127 1756 1118 666 250 335 e 12 27 600 154 2095 1322 780 300 395 e 12 38 BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 16 19 Issue 11 02 Phone 07321 3200 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 Drawing 3E 60797 ERU Knife Gate Valve K1 with piston actuator Ds 2 d 36 marr o
4. sandblasting the valve or penstock must be covered effectively In case according to the safety regulations for technical equipment DIN 31000 and following as well as the relevant rules for prevention of accidents UVV it is necessary to restrict the access to the moving range of the weight loaded levers Access to the moving range of the valve gate of ERU Knife Gate Valves K1 with piston or electric actuator has to be restricted by protection devices Effective protective devices have to be installed by the customer On request we will supply suitable protective covers 3 Design Features and Range of Application 3 1 Type and design 3 1 1 ERU Knife Gate Valve K1 according to drawing 3E 60 795 with non rising stem Designed for operating devices e g handwheel extension stem chain wheel drive operating key Prod No 4605 PN 4 4615 PN6 4655 PN 10 3 1 2ERU Knife Gate Valve K1 acc to drawings 3E 60 796 and 3E 60 797 with rising stem Designed for automatic operation by means of piston or electric actuator Prod No 4607 PN 4 4617 PN6 4657 PN 10 BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 2 19 Issue 11 02 Phone 07321 3200 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 3 2 Range of application ERU Knife Gate Valves K1 are wafer type single door gate valves with short face to face dimension according to EN 558 1
5. basic series 20 former DIN 3202 part 3 series K1 ERU Knife Gate Valves K1 are suitable for ON OFF operation If they are equipped with a regulating orifice ERU Knife Gate Valves K1 are also suitable for regulating purposes a size Nom press Hydrostat test pressure Max admissible working PN pressure in bars at a working temperature of max 80 C Prod No 350 _ 10 15 10 10 4865 4867 400 600 6 9 6 6 4615 4617 400 600 4 6 4 4 4605 4607 4 Performance Mode of Operation The solid gate slides between the two body components It seals on its periphery against a steel reinforced elastomer U shaped profile The front sides of the gate are ensured to the outside on both sides by means of readjustable transverse seals The gate valves are tested for tightness and resistance to DIN EN 12266 and DIN EN 1074 at the manufacturer s plant They are tight in both flow directions 5 Transport Transport has to be carried out carefully Inexpert handling may cause damages to the valve Prior to mounting such damages are to be repaired in an appropriate manner Valves too heavy to be handled manually have to be transported by means of lifting gears suitable for the weight involved e g broad belts They have to be placed around the body e g between the two connecting flanges Valves with eyebolts or lugs have to be suspended at these devices in an appropriate manner It is not allowed
6. leakage is discovered make the transverse seals tight by uniformly tightening the bolts Firmly tighten counternuts By this adaptation to the actual operating conditions the operating force is reduced and the service life of the transverse seal is increased If disturbing sluggishness of motion continues to be noticed check whether the valve has been compressed too hard between the flanges of the pipeline Slacken the full length flange bolts evenly and re check smooth operation of each one See also Section Trouble shooting by customer BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 4 19 Issue 11 02 Phone 07321 3200 Fax 07321 320 491 Rev 2 10 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 Inadmissible Modes of Operation For inspection or maintenance work the valve or parts of it may only be dismantled if the pipe section in which it is installed has been isolated and made pressureless If work is carried out in the vicinity of the valves leading to soiling concrete work masonry painting sandblasting the valves have to be covered effectively If the ERU Knife Gate Valves K1 are equipped with EPDM profile seals the EPDM parts must not come into contact with oil or grease since EPDM swells For the recommended lubricant see Section Maintenance ERU Knife Gate Valves K1 of this type are not suitable for regulating service For explicitly regulating operation use special typ
7. reduced or may be extended If a leakage is then found at the gate seal uniformly re tension the screws of the transverse seal on both sides see Commissioning Should it no longer be possible to retighten the transverse seal replace these sealing elements For installation see special repair instructions BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 5 19 Issue 11 02 Phone 07321 320 0 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 Examine valve gate and stem regularly for contamination clean if necessary and treat with lubricant rub in a thin layer Depending on the installation conditions regularly regrease ERHARD Knife Gate Valves K1 which are equipped with grease nipples in the area of the stem bearing assembly Recommended lubricant KLUBERSYNTH VR69 252 Messrs Kluber Lubrication Munich 10 2 Trouble shooting by customer Too little preloading Readjustment of the transverse seal see Leakage atthe pressure than set packing cords on the gate gate on both sides gate end face body screws First of all tighten full length screws from flange Leakage atthe Preloading of the body to flange and as far as within reach body body periphery screws screws If this does not prove to be successful replace U shaped sealing element Leakage in the Contamination of the gate Clean and grease gate closed position Defective U shaped Replace U shaped sealing
8. BA46E040 M Operating Instructions ww ERU Knife Gate Valve K1 DN 350 600 General Safety Aspects Design Features and Range of Application Performance Mode of operation Transport Installation into the pipeline Commissioning Inadmissible Modes of Operation Storage F 10 Maintenance 11 Design with mounted electric actuator 12 Design with mounted piston actuator 13 Parts lists and drawings OANOaARWHND 1 General The technical data of the order are binding for the type of design Modifications can only be considered if they are specified to us in time before starting production Every ERHARD valve is checked for completeness performance and tightness before leaving the factory In case of non compliance with these Operating Instructions we cannot be made liable for any damages or troubles resulting thereof We reserve the right to technical modifications as against the data and representations contained in these Operating Instructions in case this should be necessary for improving the valves 2 Safety Aspects A ERHARD valves and penstocks are reliable and designed to the state of the art However these valves can be a danger when handled by untrained staff in an inexpert manner or when they are not used in accordance with their duty and purpose Whoever in the user s works is engaged in mounting dismantling or remounting operation and service inspection maintenance rep
9. Gate Valve K1 electric actuator s are equipped with Torque and travel switches with 1 break and 1 make contact for each direction of rotation Blinker contact for indication of motor operation Heating in the switchgear compartment Thermal switch in the motor winding ERU Knife Gate Valve K1 are switched off in a travel dependent way in both limit positions The switching points of the travel limit switches are set during the factory tightness test at pressure rating in such a way that the setting avoids the gate s clamping or running against the upper mechanical limit stop of the yoke due to motor after running The torque switches act as safety switches e g in intermediate positions If the valve is supplied without mounted electric actuator the travel limit switches have to be set after mounting the electric actuator See Section 11 2 Commissioning of Electric Actuator Section Resetting the travel switches Please observe the relevant safety rules VDE TAB etc and the instructions of the electric actuator s manufacturer concerning transport storage and commissioning Electrical connection has to be effected according to Operating Instructions as well as wiring and terminal diagrams of the electric actuator s manufacturer travel torque and thermal switches heating motor Before installation the insulating resistance of the motor must be measured If it is lower than 500 K ohms this shows that the winding is moist The mo
10. air of the valves is supposed to have read and understood the complete Operating Instructions The user is recommended to have the persons involved confirm this fact in writing in each particular case BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 1 19 Issue 11 02 Phone 07321 3200 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 If no competent staff is available for such a work an expert fitter from the manufacturer has to be charged with it When using the valves observe the approved technical rules e g DIN standards DVGW prints VDI rules VDMA standards etc For valves which must be supervised relevant laws and regulations e g trading regulations regulations for prevention of accidents steam boiler regulations regulations for gas mains under high pressure regulations for combustible liquids as well as technical regulation works TRD SR TRG TRbF TRGL TRAC UVV AD instructions etc are applicable as well as the local safety regulations and rules for prevention of accidents Before removing safety devices and or carrying out work on the valve or penstock the pipe section must be made pressureless and harmless e g by closing the valves and emptying the pipes Unauthorized erroneous and unexpected operation of the valve has to be avoided If work is carried out in the vicinity of the valve or penstock which leads to soiling concrete work masonry painting
11. difference ERU Knife Gate Valves K1 are a clamped between two flanges of the pipeline wafer type or b screwed to the end flange of the pipeline as end of line valves When installing the valve into the pipeline the special flange drilling configuration has to be observed for this type of valve One part of the screws connects the pipe flange with the body The other part is placed along the body from pipe flange to pipe flange 7 Commissioning Prior to commissioning the stem and the stem nut have to be greased Recommended lubricant see Section 10 Maintenance After installation check the valve for smooth operation and move it over the whole travel OPEN CLOSED by means of the operating gear Attention When valve is equipped with electric actuator see also Section 11 Design with mounted electric actuator and Section 11 2 Commissioning of the Electric Actuator When valve is equipped with handwheel the valve gate touches the bearing hub in open position For design with electric actuator or piston actuator a clearance will remain visible after running The transverse seals have been set pre loaded to the nominal pressure at the factory They can be adjusted to the actual operating pressure By slackening the counternuts and bolts the preload of the seal is reduced CAUTION Flow medium may escape Wherever toxic or caustic fluids are handled wear protective clothing goggles As soon as any slight
12. e piston rod the pressurized piston moves the gate in vertical direction OPEN CLOSED The end positions are limited by stop of the piston piston nuts at the mounting flange or cylinder cover The piston actuator is suitable for compressed air compressed water and compressed oil If compressed water is used more maintenance is necessary due to the properties of the water For change over Open Closed we recommend to use manually or electromagnetically operated 5 2 way valves The outlets of these valves have to be equipped with throttles so that the operating speed can be controlled or adapted to the operating conditions Operating limits for the standard type Max working Required Max working Required Max working Required pressure bar supply pressure bar supply pressure bar supply PN pressure PN pressure PN pressure bar bar bar P P P BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 9 19 Issue 11 02 Phone 07321 3200 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 13 Parts Lists and Drawings In column E V the parts are marked as follows e Spare parts or sets of spare parts e g E1 spare part set No 1 or e Wearing parts or sets of wearing parts e g V1 wearing part set No 1 Parts List for drawing 3E 60795 ERU Knife Gate Valve K1 with chain wheel drive handwheel square muff square cap Part Description Qty E V Part Description
13. element sealing element Seizing of the gate on Slacken preloading of transverse seal on both one side sides Pre load anew uniformly on both sides so that the gate moves centrically Excessive Slacken transverse seal operating forces transverse seal see Commissioning on the gate on both sides Threaded bush or stem Regrease thread collar running dry Collar bush and stem Regrease at the grease nipple collar bearing Residues of flow medium Pipe section pressureless Clean and grease all are hardened accessible surfaces of gate and stem Slacken transverse seal on both sides Slightly unscrew upper body screws Knock at the valve with a rubber mallet trying to operate the valve If you are not successful remove dismantle clean replace damaged parts BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 6 19 Issue 11 02 Phone 07321 3200 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 11 Design with mounted electric actuator Type with rising stem acc to drawing 3E 60 796 Prod No 4607 12 4617 12 4657 12 The instructions of Sections 2 to 10 of these Operating Instructions are applicable The electric actuator is concentrically mounted on the yoke of the ERU Knife Gate Valve K1 The stem of the knife gate valve is moved in vertical direction OPEN CLOSED by means of the threaded bush of the electric actuator The standard type of the ERU Knife
14. es e g with regulating orifice Extending the operating elements by for example levers or similar items is not allowed danger of damage Jogging operation with ERU Knife Gate Valves K1 with electric actuator is not allowed in end position or if objects are jammed in the pipeline Storage Do not store the valves outdoors During the storage period the valves have to be protected against outside influences and impurities e g by covering them with a tarpaulin Store valves standing on their feet Store valves without feet flat on their connecting flange by means of intermediate boards If long time storage is required the place of storage should be selected in such a way that the following conditions are met frost protected cool dry dust free dark for elastomer UV light is inadmissible If it is impossible to comply with these conditions the valves must be packed to meet these requirements e g they have to be welded in dark foil Store ERU Knife Gate Valves K1 in closed position Rubber coated components as e g the U shaped sealing element between the body parts have to be protected against direct solar radiation Avoid the effects of radiant heat e g from radiators Maintenance ERU Knife Gate Valves K1 should be moved regularly at short intervals every half year over the whole travel OPEN CLOSED Depending on the flow medium and the local conditions at the site of application the maintenance interval must be
15. irection of rotation by short electrical starting Check correct switching sequence of the torque switches in Open Close direction by manual operation 6 Change poles if necessary 7 Move the valve over the whole travel only if the direction of rotation for closing the valve is CLOCKWISE oR In case of wrong direction of rotation travel and torque switches are ineffective Resetting the travel switches BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 8 19 Issue 11 02 Phone 07321 3200 Fax 07321 320 491 Rev 2 12 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 Move the valve manually into OPEN end position Return by a travel of approx 5mm Adjust the OPEN travel switch according to the Operating Instructions of the electric actuator s manufacturer 4 Move the valve manually into Closed end position 5 Adjust the CLOSED travel switch according to the Operating Instructions of the electric actuator s manufacturer WN If these measures proposed by us are not observed we cannot be made liable for any damages resulting thereof Design with mounted piston actuator double acting Type with piston rod acc to drawing 3E 60 797 Prod No 4607 20 4617 20 4657 20 The instructions of Sections 2 to 10 of these Operating Instructions are applicable The piston actuator is concentrically mounted on the yoke of the ERU Knife Gate Valve K1 By means of th
16. m tin 35 Zr 34 N 33 D2 32 LJ gt 31 lt N 27 28 29 30 37 26 19 25 16 17 I 20 18 21 22 23 15 24 14 7 13 6 12 5 11 4 ASSES N QO 3 2 10 J 9 FLANGE CONNECTING DIMENSIONS TO DIN 2532 PN10 CONNECT ING ELEMENTS FOR FLANGE CONNECTION TO DRAWING 4E131899 FACE TO FACE DIMENSION EN558 1 BASIC SERIES 20 FORMER DIN3202 PART 3 SERIES K1 BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 17 19 Issue 11 02 Phone 07321 320 0 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 Drawing 2E 42038 ERU Knife Gate Valve K1 with mounted limit switches Siemens SE1 and Bernstein BEK of TRAVEL a A A N Q BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 18 19 Issue 11 02 Phone 07321 320 0 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 DN Xss Xsex_ Dimensions Xg_e and Xgex are only approximate dimensions and are not binding for safe operation of the limit switches 600 138 157 BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 19 19 Issue 11 02 Phone 07321 320 0 Fax 07321 320 491 Rev 2
17. mbH amp Co D 89502 Heidenheim Postfach 1280 Page 13 19 Issue 11 02 Phone 07321 320 0 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 Electric Closing Opening time in seconds at the actuator following speeds of electr actuator of N AUMA 0 SA 10 1 A 10 max 120 NM 200 282 256 en 1715 313 ee max 250 NM Preferred series 1 2 for standard actuator for regulating actuator BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 14 19 Issue 11 02 Phone 07321 320 0 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 Drawing 3E 60796 ERU Knife Gate Valve K1 with electric actuator Hs UP TO CENTRE OF VALVE EL ACTUATOR EMG DREMO 21 E E H2 EL MULTI TURN ACTUATOR AUMA Es BA46E040 Issue 11 02 Rev 2 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Phone 07321 3200 Fax 07321 320 491 Page 15 19 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 FLANGE CONNECTING DIMENSIONS TO DIN 2532 PN10 CONNECTING ELEMENTS FOR FLANGE CONNECTION TO DRAWING 46131899 FACE TO FACE DIMENSION EN558 1 BASIC SERIES 20 FORMER DIN3202 PART 3 SERIES K1 Parts list for drawing 3E 60797 ERU Knife Gate Valve K1 with piston actuator Part Description Qty E V Part Description Qty E V 1 Body component
18. tain torques corresponding to the torques set at the torque switch Moreover the foreign matter can come off and be flushed out of the seating zone Operation by emergency handwheel If the valve is operated by means of the handwheel of the electric actuator the torque switches do not provide any safety function If a foreign body is jammed with the valve being in intermediate position excessive operating force particularly in case of high gear reduction might be damaging to the drive components Therefore we draw your attention to the following fact If any resistance is detected during emergency handwheel operation some turns must be made in the opposite direction before the handwheel is turned again in the direction in which the disturbance occurred flush out the foreign body Continue operation with utmost care in no case using excessive force If need be repeat flushing operation 11 2 Commissioning of the Electric Actuator For commissioning the valve the Operating Instructions of the electric actuator s manufacturer are applicable too 1 Move the ERU Knife Gate Valve K1 manually to intermediate position 2 Check the gate movement and thus the direction of rotation of the actuator by short electrical starting Valve is closing CLOCKWISE direction of actuator rotation Valve is opening ANTI CLOCKWISE direction of actuator rotation In case of wrong direction of rotation change poles of motor connection Check d
19. to attach the lifting gears to the handwheel the stem the gearbox case or to the flange holes which would be contrary to the relevant safety regulations 6 Installation into the pipeline A Remove all packing material from the valve Prior to installation check the pipeline for impurities and foreign bodies and clean it if necessary ATTENTION For valves with an arrow showing the flow direction this direction must be observed It is important that all around the valve there is free access for operation and maintenance For outdoor installation the customer has to protect the valve against the direct effects of the weather BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 3 19 Issue 11 02 Phone 07321 3200 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 During installation of the valve the distance between the pipe flanges should exceed the valve face to face dimension by at least 20 mm Thus the raised faces will not be damaged and the gaskets can be inserted Steel reinforced rubber seals are recommended for use as flange gaskets consider resistance to flow medium and temperature The mating pipe flanges must be plain parallel and concentric Tighten the connecting bolts evenly without distortion and crosswise The pipeline mustn t by any means be pulled up to the valve If the distance between the flanges is too large for the valve use thicker gaskets to cover the
20. tor has to be removed in order to be dried up and it must be heated by means of a hot air fan or in a heating chamber max admissible temperature 100 C 11 1 Jogging and emergency hand operation Attention If a foreign body is jammed in when operating the valve the torque switch for the corresponding direction responds and switches off the motor The time lag between response of the torque switch and disconnection of the motor from the network depends on the signal delay If another closing order is given in the original direction without having moved the valve sufficiently in the opposite direction BA46E040 Erhard GmbH amp Co D 89502 Heidenheim Postfach 1280 Page 7 19 Issue 11 02 Phone 07321 3200 Fax 07321 320 491 Rev 2 Operating Instructions ERU Knife Gate Valve K1 DN 350 600 the torque will increase If this procedure is repeated several times the torque will accumulate The valve and its operating elements are not designed for such an emergency and might be damaged We explicitly draw your attention to the fact that such jogging operation is inadmissible Jogging operating is admissible under the following conditions If the torque switch responds in intermediate position the valve must first be moved in the opposite direction until the torque switch completely returns to its original position Only now the valve may be moved again in the direction in which the disturbance occurred Proceeding this way you will ob
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