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BA56E003 Operating Instructions ERHARD Swing Check Valve

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1 General 2 Safety Aspects 3 Product description and Range of application 4 Mode of operation 5 Transport 6 Storage 7 Installation into pipeline 8 Maintenance 9 Parts lists and drawings

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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 or penstock 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 or penstocks.

2 Safety Aspects ERHARD valves or penstocks are reliable and designed to the state of the art. However, risks could be involved if the valve or penstock is handled in an inexpert manner by untrained staff and not used in accordance with its duty and purpose. Whoever in the users works is engaged in mounting, dismantling or re-mounting, operation and maintenance, inspection and repair of the valve or penstock, is supposed to have read the complete operating instructions and to have understood them. The user is recommended to have the person involved confirm this fact in writing in each particular case. If no competent staff is available for such a work, an expert fitter from the manufacturer has to be charged with it. 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 shutting off the pumps, closing the valves, emptying the pipes, and, in case, lowering the counterweight.

BA56E003 DEC.2006 REV:9

Erhard GmbH & Co D-89502 Heidenheim Postfach 1280 Telefon (07321) 320 0 Fax (07321) 320 491

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Erhard Operating Instructions for Swing Check Valve

______________________________________________________________________ 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. The local safety regulations and rules for prevention of accidents are applicable. If work is carried out in the vicinity of the valve or penstock, which leads to soiling (concrete work, masonry, painting, 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. Effective protective devices have to be installed by the customer. On request, we will supply suitable protective guards.

3 Product description and Range of application

The ERHARD Swing Check Valve is a non-return valve with free-swinging valve disc. It is suitable for application in the range of the flow media water and sewage. The design allows swabbing exclusively in flow direction.

Nominal size Nom.press. Hydr.test pressure in bar Max. admissible operatingDN PN for pressure in bar at

Body Seat working temperature< 70C Prod. number

80, 200-300 10 15 10 10 5610 ....80 - 300 16 24 16 16 5620 ....

The Swing check valve is put on for water speeds under stable flow rates according to table: values after EN1074-1: 2000

PFA bar

Velocity of flow m/s

10

16

3 4

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4 Mode of operation

These Check Valves work according to the principle of a free-swinging check valve. This disc is supported on the lever and in the body cover. The check valves of standard type are equipped with internal shaft or shaft protruding on one side (square connection). For horizontal pipelines, the weight-loaded lever is mounted on the left, viewed in the mediums flow direction. For other installations, for example with vertical piping, the weight-loaded lever must be rearranged on the shaft. In this case, the flow direction must be from below upwards. The disc is opened by the flow. Against this opening torque acts a torque resulting from the weight of the valve hinge and the disc and in case from the outside weight-loaded lever. This closing torque initiates the closing movement in case of flow failure. When the valve is equipped with external weight-loaded lever, the closing torque can be decreased within certain limits by moving the counterweight towards the shaft. But in any case it must be ensured that the disc shuts the valve even without back pressure.

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 to attach the lifting gears to the lever or to the flange holes which would be contrary to the relevant safety regulations.

DN 80 100 125 150 200 250 300Aprox.weight kg 21 24 40 46 75 148 169 with internal shaft

23 27 43 50 80 154 175 with weight-loaded lever

6 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.

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7 Installation into the pipeline Remove all packing material from the valve. Prior to installation, check the pipeline for impurities and foreign matters and clean it if necessary. 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 maintenance. 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. Gaskets to DIN 2690 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 by means of the bolts. The pipeline mustnt by any means be pulled up to the valve.

Do not install Tilting-Disc Check Valves directly before or after pipeline components as, for example, pumps and pipe bends! An asymmetrical flow is to be found after these components, which causes highly one-sided bearing loads. The installation distance should be about 4 x DN. In case this distance can not be maintained, the installation position must be chosen in such a way that ensures the shaft of the pump and the shafts of the valve disc to be in alignment with each other. In case of deviant installation positions, an increase in wear is to be expected! Image 1 and 2 present the desired installation positions when directly positioned after pumps or pipe bends.

Prior to filling the pipeline with water, the valve disc has to be checked for smooth operation: move the valve on the lever over the whole pivoting range. Don t let the weight-loaded lever drop!

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The valves can be installed in horizontal pipelines as well as in vertical pipelines (in this

case, upward flow direction).

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______________________________________________________________________ 8 Maintenance

Check Valves are equipped with maintenance-free plain bearings and maintenance-free shaft sealing.

Under pressureless condition the mobile parts are accessible after dismantling the cover and the blind flanges. Clean these parts if they are dirty. When the blind flange and / or shaft lid is screwed off, the bearing bushes can be removed from the cover. Then the 0-rings of the shaft sealing can be checked and changed, if necessary. The precision seal in the valve disc is accessible and can be replaced after removing the cover. Assembly is done in reverse order. Spare parts include elastomer 0-rings and shaft sealing.

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ERHARD Swing Check Valves are maintenance-free. Check valves should be checked regularly in connection with maintenance work at the corresponding plant according to DVGW print W 392, paragraph 7.6 and ATV work sheet A 116, paragraph 4.3. All feed, main and supply lines should be checked once a year as a rule. The following features have to be checked: - Corrosion on visible parts, if necessary repair or replace them. - Easy movement of the obturator, if necessary dismantle, clean and lubricate and/or replace the components which are involved in the movement. - Performance (visual) of the internal parts of the check valve by having water flow through the valve during a short period - Tightness of the shaft passage and the precise seal on the valve disc For flow medium "water", the recommended lubricant is Klber Unisilikon L641. For flow medium " water", silicone-free design, the recommended lubricant is Klber Synth VR 69-252.

For effecting above mentioned work and the maintenance work which is to be done regularly, we recommend to conclude a maintenance contract with our company. This contract ensures that all work will be carried out by well-experienced experts.

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9 Parts Lists and Drawings Check Valve with internal valve shaft DN 80 - 300 Drawing No. 3E 61950

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DN PN L H D b d2 d4 e f k Number ofbolts *)

80 10 200 145 200 19 18 133 220 3 160 416 200 145 200 19 18 133 220 3 160 8

100 16 300 200 220 19 18 153 220 3 180 8125 16 350 220 250 19 18 183 280 3 210 8150 16 400 230 285 19 22 209 280 3 240 8200 10 500 300 340 20 22 264 370 3 295 8

16 500 300 340 20 22 264 370 3 295 12250 10/16 600 385 400 22 26 319 490 3 355 12300 10/16 700 410 455 24,5 26 367 490 4 410 12

*) Quantity of bolts required for each body connecting flange Parts list for drawing 3E 61950 (Check Valve with internal valve shaft) In column "E/V" the parts are marked as follows: Spare parts or sets of spare parts, e.g. E1 = spare part set No. 1 or Wearing parts or sets of wearing parts, e.g. V1 = wearing-part set No. 1

*) Quantity varies according to the nominal size DN

Check Valve with weight-loaded lever DN 80 - 300 Drawing No. 3E 61951

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______________________________________________________________________ DN PN L H H1 D b d2 d4 e e1 f k Number of

bolts *)80 10 200 145 270 200 19 18 133 220 170 3 160 4

16 200 145 270 200 19 18 133 220 170 3 160 8100 16 300 200 290 220 19 18 153 220 170 3 180 8125 16 350 220 385 250 19 18 183 280 195 3 210 8150 16 400 230 385 285 19 22 209 280 195 3 240 8200 10 500 300 400 340 20 22 264 370 265 3 295 8

16 500 300 400 340 20 22 264 370 265 3 295 12250 10/16 600 385 500 400 22 26 319 490 355 3 355 12300 10/16 700 410 530 455 24,5 26 367 490 355 4 410 12

*) Quantity of bolts required for each body connecting flange Parts list for drawing 3E 61951 (Check Valve with external valve shaft) In column "E/V" the parts are marked as follows: Spare parts or sets of spare parts, e.g. E1 = spare part set No. 1 or Wearing parts or sets of wearing parts, e.g. V1 = wearing-part set No. 1.

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