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OPERATION AND MAINTENANCE INSTRUCTIONS
NOZ-CHEK®Cryogenic Valves
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Crane ChemPharma & Energy
Page 1: ...www cranecpe com OPERATION AND MAINTENANCE INSTRUCTIONS NOZ CHEK Cryogenic Valves brands you trust Crane ChemPharma Energy ...
Page 2: ...een low pressure loss and quick dynamic response keeping the reverse velocity to a minimum Further development and testing of the valve including updating to state of the art machining techniques and refined material selection means the Noz Chek now fully complies with BS 6364 cryogenic leak rates 1 2 CRYO NOZ CHEK FEATURES Cryogenic Service The Cryo Noz Chek valve is capable of achieving reduced ...
Page 3: ...oss and wear of components This phenomenon is not exclusive to Crane equipment and should be applied to any pipe layout as good practice The pressure loss of any piece of piping equipment in a system will be affected by the presence of other equipment Pressure loss is an unrecoverable energy loss and is the measured decrease in pressure Measuring the pressure drop immediately before and after pipi...
Page 4: ...ed by increased velocity in the minimal flow area results in additional force to assist the Disc to open and allows for extra spring loading that facilitates a faster closing time This spring force is balanced in the fully open position of the disc for a given velocity of flow This velocity depends upon the flow imposed by the service conditions and the Specific Gravity of the fluid The Noz Chek I...
Page 5: ...oved for inspection See Figure 3A 5 3 VALVE DIS ASSEMBLY TYPICAL SEE FIGURE 1 Ensure that area upstream of seat 2 is clean and free from scale Valve should be resting on downstream side ensuring no damage to sealing face Valve may need to be secured to avoid rotation when dis assembling a Remove seat screw 13 and insert the Seat Extractor tool into the slots in the seat to unscrew the Seat 2 count...
Page 6: ...limit switch 21 is inserted fully into the switch housing and followed by the switch spacer 27 5 The cable of the limit switch 21 should be passed through the cable gland 22 and the cable gland screwed into the switch housing 20 b Magnet housing assembly See Figure 4 1 The 2 magnets 24 are joined together opposite pole to opposite pole and inserted into the magnet housing 25 the switch s sensor de...
Page 7: ... chek valves for use in Cryogenic Service Doc No ESB 3268 Revision 0 Checked P Burns Revision Date 25 08 20 Page 11 of 16 Crane Stockham Valve Ltd Registered Number L549383 Eng 6 Alexander Road Registered Address 100 Barbirolli Square Cregagh Belfast BT6 9HJ Manchester M2 3AB Phone 44 0 28 90 704222 Fax 44 0 28 90 401582 STOCKHAM VALVE Duo Chek Noz Chek Marlin Flowseal Center Line Item Quantity De...
Page 8: ...ckham Noz chek valves for use in Cryogenic Service Revision 0 Checked P Burns Revision Date 25 08 20 Page 12 of 16 Crane Stockham Valve Ltd Registered Number L549383 Eng 6 Alexander Road Registered Address 100 Barbirolli Square Cregagh Belfast BT6 9HJ Manchester M2 3AB Phone 44 0 28 90 704222 Fax 44 0 28 90 401582 FIGURE 2 FIGURE 2 ...
Page 9: ...ription 1 1 BODY 20 1 SWITCH HOUSING 21 1 SWITCH 22 1 GLAND 27 1 SWITCH SPACER FIGURE 3A FIGURE 3B Item Quantity Description 1 1 BODY 20 1 SWITCH HOUSING 21 1 SWITCH 22 1 GLAND 27 1 SWITCH SPACER CRANE Engineered Valve Division Subject Installation Operating and Maintenance manual for Crane Stockham Noz chek valves for use in Cryogenic Service Doc No ESB 3268 Revision 0 Checked P Burns Revision Da...
Page 10: ... 16 Crane Stockham Valve Ltd Registered Number L549383 Eng 6 Alexander Road Registered Address 100 Barbirolli Square Cregagh Belfast BT6 9HJ Manchester M2 3AB Phone 44 0 28 90 704222 Fax 44 0 28 90 401582 STOCKHAM VALVE Duo Chek Noz Chek Marlin Flowseal Center Line Item Quantity Description 3 1 VALVE DISC 23 1 MAGNET SPACER 24 2 MAGNETS 25 1 MAGNET HOUSING 26 1 GRUB SCREW FIGURE 4 FIGURE 4 Item Qu...
Page 11: ...oblem 6 3 The valve leaks excessively across seal a The seal is defective b Disc is not seating properly c The Spring Energised seal or Metal C Seal may be damaged d If the valve is fitted with a switch the grub screw may have become loose and the magnet housing is impeding the disc s movement To remedy this clean both threads thoroughly apply an even coat of Jet Lube Thick or Thin thread paste to...
Page 12: ...Z CHEK PACIFIC VALVES RESISTOFLEX REVO SAUNDERS STOCKHAM TRIANGLE UNI CHEK WTA and XOMOX are registered trademarks of Crane Co All rights reserved brands you trust CPE NOZ CHEK CRYOGENIC IM EN A4 2020_08_26 Crane Energy Global Headquarters 4526 Research Forest Drive Suite 400 The Woodlands Texas 77381 U S A Tel 1 936 271 6500 Fax 1 936 271 6510 Crane Stockham Valve Ltd 6 Alexander Road Cregagh Bel...
