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INSTALLATION, OPERATION AND MAINTENANCE MANUAL – ORIGINAL VERSION

AVK GATE VALVES FOR WATER AND FIRE PROTECTION

SERIES 145

COPYRIGHT©AVK GROUP A/S 2020 - AVK INTERNATIONAL A/S, BIZONVEJ 1, DK-8464 GALTEN - WWW.AVKVALVES.EU 

MI GateValve 145 rev. AC 2020 GB

TABLE OF CONTENT

1. Introduction 

2. Exploded view

3. Parts list

4. Receiving and storage

 

4.1 Unloading

 

4.2 Inspection after unloading

 

4.3 Storage

5. Installation and testing

 

5.1 Inspection prior to installation

 

5.2 Installation

 

5.3 Testing after installation

 

5.4 Application hazards

6. Operation and maintenance

 

6.1 Tools

 

6.2 Operation

 

6.3 Maintenance procedures

  6.3.1 

Inspection

 

 

6.3.2 Record keeping

7. Repair procedures

 

7.1 NRS valve repairs

 

 

7.1.1 Wrench nut repair

 

 

7.1.2 Upper stem seal components repair

 

 

7.1.3 Bonnet gasket replacement

 

7.2 OS&Y valve repairs

 

 

7.2.1 Handwheel replacement

 

 

7.2.2 Stem seal O-ring replacement

 

 

7.2.3 Supervisory switch installation

8. Troubleshooting guide

9. Parts and service

Summary of Contents for 145 Series

Page 1: ...ing 4 3 Storage 5 Installation and testing 5 1 Inspection prior to installation 5 2 Installation 5 3 Testing after installation 5 4 Application hazards 6 Operation and maintenance 6 1 Tools 6 2 Operation 6 3 Maintenance procedures 6 3 1 Inspection 6 3 2 Record keeping 7 Repair procedures 7 1 NRS valve repairs 7 1 1 Wrench nut repair 7 1 2 Upper stem seal components repair 7 1 3 Bonnet gasket repla...

Page 2: ...All series 145 valves are configured for CTC operation and have flanged end connections to ANSI B16 42 class 150 This manual will provide you with the information needed to properly install and maintain the valves and to ensure a long service life 2 EXPLODED VIEW Page 2 12 MI GateValve 145 rev AC 2020 GB American AVK Series 145 Resilient Seated Gate Valve Exploded Parts Breakdown F220 F201 F221 F2...

Page 3: ...F215 OS Y stem assembly Stainless steel stem Wedge pin Wedge 304 Stainless steel 304 Stainless steel EPDM encapsulated ductile iron core with integral nylon wedge shoes F216 Bonnet bolts Zinc plated steel F217 NRS bonnet Ductile iron ASTM A536 F218 Bonnet gasket NBR F219 Body Ductile iron ASTM A536 F220 Wrench nut handwheel bolt Zinc plated steel F221 Wrench nut handwheel washer Zinc plated steel ...

Page 4: ...esent 2 Inspect each valve in a similar manner as described in section 4 2 INSPECTION AFTER UNLOADING 5 2 INSTALLATION 1 All exposed bolts should be checked for proper tightness 2 Where practical valves should be located in easily accessible areas 3 Valves should be supported and aligned to avoid damage to the valves Valves should not be used to correct misaligned piping 4 Tighten bolts and nuts f...

Page 5: ...ON HAZARDS 1 Resilient seated gate valves should not be installed in lines where service pressure will exceed the rated working pressure of the valve 2 Resilient seated gate valves should not be used for throttling service unless the design is specifically recommended for that purpose or approved in advance by the manufacturer 3 Resilient seated gate valves should not be used in applications that ...

Page 6: ... of packing or seals If leakage is observed all defective O rings seals gaskets or end connection sealing parts should be replaced If the leakage can not be corrected immediately the nature of the leakage should be reported promptly to those who are responsible for repairs If the valve is inoperable or irreparable the precise valve location should be noted to save time for repair crews The conditi...

Page 7: ...nut bolt F220 and wrench nut washer F221 using a 1 2 13mm wrench for DN65 100 valve sizes and an 11 16 17mm wrench for DN150 200 valve sizes page 7 REPAIR PROCEDURES In most instances in order to keep system down time to a minimum complete valve assembly replacement is implemented This also may be preferable due to physical access restrictions in the area of the valve in question If this is the ca...

Page 8: ...Bolts F227 using the appropriate sized Allen Wrench See page 5 3 Remove the Gland Flange F228 4 When performing step 3 verify the location of the Upper Stem Seal O rings quantity 2 F230 and the Stem Seal Bushing F231 They may be located on the Stem F233 See Fig 4A or in the counterbore of the Gland Flange F228 See Fig 4B 5 There is a groove or recess in the bottom of the Gland Flange F228 for the ...

Page 9: ... 2 Once the hot melt glue has been removed use 5 16 or 8mm Allen wrench to remove the 2 vavle Bonnet Bolts F216 and a 3 8 or 10mm Allen wrench for valve sizes 3 8 See Fig 5B 3 Replace the Bonnet Gasket F218 Place the Bonnet gasket into the relief in the Bonnet F217 and insert the Bonnet Bolts F216 into the bolt holes in the Bonnet F217 and through the Bonnet Gasket F218 4 Re assemble in reverse or...

Page 10: ...zed lugs Be sure to align the lugs in the correct location See Fig 6B 5 Align the Upper Stem Nut F201 with the Lower Stem Nut F205 And insure that there is full engagement of the lugs 6 Carefully turn the Handwheel F202 in the opening direction until the Yoke Bonnet F263 is fully down and resting on the Body F219 CAUTION When lowering the head assembly back on the body take care to ensure that the...

Page 11: ...probe to access the three Stem Seal O rings F211 NOTE These O rings are split type o rings When replacing them insure that the splits DO NOT align Rotate the splits at approximately 30 degree intervals Use a light coat of FDA approved food grade grease for lubrication See Fig 7B 3 Reverse steps 2 and 3 for re assembly CAUTION Do not over tighten the upper pair of Gland Follower Bolts F261 Tighten ...

Page 12: ...e connections Corrective action Tighten flange hardware Corrective action Verify gasket is not damaged Replace if necessary PROBLEM Valve hard to operate Probable cause Gland bolts too tight or unevenly tightened Corrective action Loosen and then re tighten gland bolts evenly Probable cause If the valve has not been operated over a prolonged period of time build up may occur on the internal parts ...

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