Flowserve V-370 R3 Edward Valves Manuel d'utilisateur télécharger pdf (Page 19)

EDWARD UNIVALVE USER INSTRUCTIONS ENGLISH 12-13

OPERATIONAL RECOMMENDATIONS

RECOMMENDED CLOSING TORQUES

To assure long seat life and seat tightness, it is very

important to close the Univalve with enough seat

stress/stem load.

The torques in this table should be applied when closing

against the maximum (100°F) valve pressure. The impactor

handle/handwheel performance chart on pg. 20 will achieve

these stem loads.

Overtorquing can, on the other hand, damage seats and

bend stems, so torques greatly in excess of these should

not be applied.

Torques are for valves with stem packing tightened – see page 17.

Figure Number

All Valves With Five-Digit Figure Numbers

1/2 3/4 1 1-1/4 1-1/2 2 2-1/2 3 4

36120, 36124,

36128, 36160

36164, 36168

30 30 30 95 95 155 275 275 275

36220, 36224,

36228, 36260,

36264, 36268

30 30 30 95 95 155 275 275 275

66120, 66124,

66128, 66160,

66164, 66168

45 45 45 85 85 230 395 395 395

66220, 66224,

66228, 66260,

66264, 66268

45 45 45 85 85 230 395 395 395

96124, 96128,

96164, 96168

70 70 70 70 70 350 350 350 350

96224, 96228,

96264, 96268

70 70 70 70 70 350 350 350 350

MINIMUM TORQUE FOR CLOSING VALVES — FT-LB ON MAIN SEAT (Do Not Apply This Load to Backseats.)

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Flowserve V-370 R3 Edward Valves Manuel d'utilisateur Page 19