Operational recommendations – Flowserve V-370 R3 Edward Valves User Manual
Page 19
EDWARD UNIVALVE USER INSTRUCTIONS ENGLISH 12-13
19
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.)