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VGF FLANGED GLOBE VALVES
13
63-2618—01
Location
Select a location where the valve and actuator are
accessible. Allow sufficient space for servicing the valve
and actuator. See Fig. 3 and 4 for valve body dimensions.
Fig. 12. Flanged valve body installation.
Mounting the Valve
See Fig. 12 for typical installation.
1.
Hoist valve by its body only. Do not lift by stem, bon-
net, flanges, or flange holes. (See Fig. 8.)
2.
Install the valve so the flow follows the direction of
the arrow indicated on the valve body.
3.
Install the valve so the actuator is above the valve
body. The valve can be installed in any position
between vertical and horizontal. Do not install the
valve with the stem below horizontal or upside down.
4.
When controlling steam, use appropriate high
temperature kit 43196000 and rotate valve body so
that actuator is not positioned directly above the
piping.
5.
Use companion flanges with the same number of
bolt holes and dimensions as the valve to be
installed. (See Table 7.) Use standard cast-iron
flanges for the two end ports.
6.
Use a gasket material recommended for the medium
to be handled.
7.
Use mounting bolts long enough so the nuts can use
the full length of the nut threads. (See Fig. 11.) Use
bolts 1/8 in. smaller than the diameter of the bolt
hole to allow clearance for installing. (See Fig. 12.)
Mounting Actuator
For information on mounting, refer to the Product Data
literature for the actuator.
It is important to have the
correct actuator available for the installation. See Table 9
for recommended installation clearance from valve
bonnet.
IMPORTANT
When using VGF valves with pneumatic MP953C
and MP953E direct acting actuators, the following
stroke limiting accessories are required to prevent
over-travel and damage to the diaphragm. See Fig.
21:
• VGF21ES25 - 272629A (stem collar, purchased
separately)
• VGF21ES30 - 272629A (stem collar, purchased
separately)
• VGF21LS25 - 272629A (stem collar, purchased
separately)
• VGF21LS30 - 272629A (stem collar, purchased
separately)
• VGF31EM25 - stem collar (provided with valve)
• VGF31EM30 - stem collar (provided with valve)
Table 9. Installation Clearances (from Valve Bonnet).
CHECKOUT
For instructions for operating the valve actuator, see the
Product Data sheet for the specific actuator.
1.
Operate the control system and check valve opera-
tion to ensure the valve stem can position the valve
smoothly through full stroke without binding.
2.
Verify that the actuator fully closes the A port.
3.
Perform the checkout tests included with the actua-
tor instructions.
COMPANION
FLANGE
GASKET
GASKET
GASKET
BE SURE FACE OF COMPANION FLANGE IS FLUSH
WITH FACE OF VALVE-BODY FLANGE AND ALIGNED
SQUARELY BEFORE TIGHTENING MOUNTING NUTS.
OPTIONAL SERVICE FLANGE
COMPANION FLANGE
PIPE
M7977
Actuator
Minimum Vertical Clearance in in. (mm)
ML6420, ML7420
12-11/16 (322)
ML6421A, ML7421A
14-1/4 (360)
ML6421B, ML7421B
16-7/8 (430)
ML6425A,B; ML7425A,B
14-5/16 (364)
MN/MS Q5020
12 (305)
Modutrol IV + Q5001
14-1/2 (369)
MP953C (8 inch dia)
11-7/8 (302)
MP953C (13 inch dia)
17-11/16 (449)
MP953E (8 inch dia)
16-1/2 (420)
MP953E (13 inch dia)
25-13/16 (655)
MN/MS Q5024
18 (457)