Instruction Manual

4
INSTALLATION (Cont'd)
In all installations, the valve and adjacent piping must
be supported and aligned to prevent cantilevered
stresses on the valve. Lower valve into line using
slings or chains around the valve body. Lubricate the
flange bolts or studs and insert them around the flange.
Lightly turn bolts until gaps are eliminated.
The torquing of the bolts should then be done in
graduated steps using the cross-over tightening
method. Recommended lubricated torques for use
with resilient gaskets (75 durometer) are given in Table
2. If leakage occurs, allow gaskets to absorb fluid and
check torque and leakage after 24 hours. Do not
exceed bolt rating or crush gasket more than 50
percent of its thickness.
TABLE 2. FLANGE BOLT TORQUES
MECHANICAL JOINT ENDS: Clean ends of mating
pipe and valve sockets with soapy water (Figure 5).
Place lubricated gasket and retainer gland over pipe
end prior to installing valve. Install valve socket over
pipe. Press gland and gasket toward valve until gasket
is evenly set into valve socket.
FIGURE 5. MECHANICAL JOINT INSTALLATION
Insert T-bolts in valve flange and hand tighten nuts.
Torque nuts in four graduated steps using the cross-
over tightening method without exceeding the torque
listed in Table 3. Maintain an equal gap between the
150# FLANGE BOLT TORQUES
VALVE BOLT RECOM MAX
SIZE DIA TORQUE TORQUE
(in) (in) (ft-lbs) (ft-lbs)
30 1 1/4 175 600
36 1 1/2 175 1000
42 1 1/2 200 1000
48 1 1/2 250 1000
54 1 3/4 300 1500
60 1 3/4 350 1500
66 1 3/4 400 1500
72 1 3/4 400 1500
78 2 500 2000
84 2 600 2000
90 2 1/4 750 3000
96 2 1/4 1000 3000
102 2 1/2 1000 4000
108 2 1/2 1200 4000
CAUTION: The use of raised-face flanges
or excessive bolt torque may
damage valve flanges.
300# FLANGE BOLT TORQUES
VALVE BOLT RECOM MAX
SIZE DIA TORQUE TORQUE
(in) (in) (ft-lbs) (ft-lbs)
30 1 3/4 400 1200
36 2 600 1800
42 2 750 2250
48 2 750 2250
54 1 3/4 750 1500
60 1 3/4 750 1500
66 1 3/4 750 1500
72 1 3/4 750 1500
78 2 1000 2500
84 2 1000 2500
90 2 1/4 1500 3500
96 2 1/4 1500 3500
102 2 1/2 1500 4500
108 2 1/2 1800 4500