Howden WRV - Page 52

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9.1 TORQUE SPECIFICATIONS (Continued)
Fig. 75 Torque Specifications for Fasteners on WRVi255 compressors.
PART NUMBER
TYPE OF FASTENER
TORQUE lb ft
TORQUE Nm
R25055
40mm Locknut
Actuator Piston
150
206
G26019
¼” UNC x 5/8” Long Set Screw
Piston Seal Retaining Plate
4
5.5
M0212045
M12 x 45 Long Capscrew
Cylinder to outlet cover
37
50
M0116070
M16 x 70 Long Set Screw
Inlet and Outlet Casings
88
120
M0212035
M12 x 35 Long Capscrew
Vi Housing & Rotor Cover
37
50
VR25126-2
Locknut M42
Slide Valve
165
225
M0116050
M16 x 50 Long Capscrew
Bearing Retaining Plate
175
240
M0116060
M16 x 60 Long Setcrew
Thrust Housing
88
120
G21026
3/8” UNC x 1” Setscrew
Thrust Plate
18
25
M0112025
M12 x 25 Setscrew
Vi Screw Stop Plate
37
50
G21039
5/8”UNC x 1-1/2” Long
Setscrew
Superfeed Flange
80
108
Fig. 76 Torque Specifications for Fasteners on WRVi321 compressors.
PART NUMBER
TYPE OF FASTENER
TORQUE lb ft
TORQUE Nm
R32115
1-3/4” Locknut
Actuator Piston
180
245
G21026
3/8”UNC x 1” Long Set Screw
Piston Seal Retaining Plate
18
25
M0216060
M16 x 50 Long Capscrew
Cylinder to outlet cover
88
120
M0216050
M16x 70 Long Set Screw
Inlet and Outlet Casings
88
120
M0324080
M24 x 80 Long Capscrew
End Casings to Main Casings
295
400
M0216040
M16 x 40 Long
Vi Housing to Inlet
88
120
VR3149-2
M60 Locknut
Piston Rod to Slide Valve
270
363
G21016
½”UNC x 1” Long Setcrew
Bearing Retaining Plate
80
110
M0120070
M20 x 70 Long Setscrew
Thrust Housing
170
230
M0120060
M20 x 60 Long Setscrew
Thrust Plate
170
230
M0116040
M16 x 40 Long Setscrew
Vi Screw Stop Plate
88
120
G22006
¾” UNC x 2” Long Set Screw
Superfeed Flange
140
190