Series 751 FireLock® Alarm Check Valve
19
5.
Torque all cover bolts in an even, crossing pattern. Refer to the
“Required Cover Bolt Torque” table below for the required torque val-
ues. DO NOT over-tighten the cover bolts.
6.
Place the system back in service by following the "Placing the
System in Service" section, starting on page 9.
CAUTION
• DO NOT over-tighten the cover bolts.
Failure to follow this instruction could cause damage to the cover
plate gasket, resulting in valve leakage.
Required Cover Bolt Torque
Valve Size
Torque
ft-lbs (N•m)
Nominal Diameter
inches (mm)
Actual Outside Diameter
inches (mm)
1
1
/
2
1.900
30
(40)
(48,3)
(41)
2
2.375
30
(50)
(60,3)
(41)
2
1
/
2
2.875
60
(65)
(73,0)
(81)
76,1 mm
3.000
60
(76,1)
(81)
3
3.500
60
(80)
(88,9)
(81)
4
4.500
100
(100)
(114,3)
(136)
6
6.625
115
(150)
(168,3)
(156)
165,1 mm
6.500
115
(165,1)
(156)
8
8.625
100
(200)
(219,1)
(136)