Woodward Large Electric Sonic Valve II, Инструкция по установке и эксплуатации, Страница: 33 / 66

Manual 35076 LESV II
Woodward 31
ASTM/ASME grade bolts or studs should be used to install the valve into the process piping. The length
and diameter of the bolts and studs shall conform to ANSI B16.5 according to the valve flange size and
class.
Flange gasket materials should conform to ANSI B16.20. The user should select a gasket material which
will withstand the expected bolt loading without injurious crushing, and which is suitable for the service
conditions.
When installing the valve into the process piping, it is important to properly torque the studs/bolts in the
appropriate sequence in order to keep the flanges of the mating hardware parallel to each other. A two-
step torque method is recommended. Once the studs/bolts are hand-tightened, torque the studs/bolts in a
crossing pattern to half the required torque. Once all studs/bolts have been torqued to half the appropriate
value, repeat the pattern until the rated torque value is obtained.
Piping loads that can be considered “typical” have been used in the design of the housing to ensure that
there is not an adverse effect from the stresses applied to the housing from the inlet and outlet piping.
The loads, which were used in the design of these housings, are (and should not be exceeded):
Table 3-1. Piping Loads According to Valve Size
The valve and the valve inlet/outlet piping may be insulated. If the valve is insulated, the insulation cannot
extend beyond the valve body. The valve bonnet and actuator are not to be insulated, otherwise the valve
and/or actuator components may exceed their rated temperatures. See Figure 3-7. It is permissible to
leave the valve body un-insulated.
It is also permissible to leave the valve body un-insulated.
The Valve discharge flange must not exceed 371°C (700°F) when the valve is closed and the
downstream circuit is being purged.
Valve Size Max Pipe Axial
Force
Max Pipe Shear
Force
Max Pipe Moment Max Flange Bolt
Force (per bolt)
50 mm
(2 inch)
3600 N
(809.3 lbs.)
3600 N
(809.3 lbs.)
2200 N-m
(1622.6 lb-ft)
29016 N
(6523 lbs.)
80 mm
(3 inch)
5400 N
(1214 lbs.)
5400 N
(1214 lbs.)
3300 N-m
(2434 lb-ft)
40301 N
(9060 lbs.)
100 mm
(4 inch)
7200 N
(1618 lbs.)
7200 N
(1618 lbs.)
4400 N-m
(3245.3 lb-ft)
65634 N
(14755 lbs.)
150 mm
(6 inch)
11000 N
(2472.9 lbs.)
11000 N
(2472.9 lbs.)
6600 N-m
(4867.9 lb-ft)
78587 N
(17667 lbs.)
Released