38
70103-00001D
-
03/08
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Subject
to
change.
©
Belimo
Air
controls
(USA),
Inc.
Installation Recommendations
F6…, F7… Series Butterfly Valves
Valve
Thread
Number
Bolt Length
Size
Size
Required
Semi-Lug B’fly (Inches)
2”
⁵⁄₈
- 11
4
1.250
2½”
⁵⁄₈
- 11
4
1.500
3”
⁵⁄₈
- 11
4
1.500
4”
⁵⁄₈
- 11
8
1.750
5”
³⁄₄
- 10
8
1.750
6”
³⁄₄
- 10
8
2.000
8”
³⁄₄
- 10
8
2.250
10”
⁷⁄₈
- 9
12
2.250
12”
⁷⁄₈
- 9
12
2.500
14”
1 - 8
12
2.750
16”
1 - 8
16
2.750
18”
1
¹⁄₈
- 7
16
3.500
20”
1
¹⁄₈
- 7
20
4.250
24”
1
¹⁄₄
- 7
20
4.750
30”
1
¹⁄₄
- 7
24
4.500
Flange Bolting Recommendations
Lug Valves, 2” to 30”, ANSI 125/150 Bolt Pattern
Bolting and torque recommendations are made without a warrant, and applies only to steel weld-neck or slip-on flanges.
The use of lock washers and/or lubrication with the bolting will affect stated torque values. Refer to figure 3 for proper tightening
procedures. Observe clearance dimension between valve body and flange face.
●
Make sure the flange faces are clean and free of rust,
scale and debris to prevent damage to the liner face.
●
Do NOT use flange gaskets on HS (U) series
BF valves.
●
Follow the recommended flange bolting sequence
and bolt tightening torques found in the “Installation
Recommendations” section of this guide.
●
When installing in Victaulic piping systems, use
Victaulic 41 series flange nipples.
Installation using welded flanges:
●
Mount flanges on both sides of valve body and install
bolts to properly align valve body and both flanges.
●
Make sure the valve liner and flange internal
diameters are in alignment.
●
Take valve body / flange pair assembly and align
with piping ends.
●
TACK weld the flanges to the piping in several places.
Do NOT seam weld at this time!
●
Remove the lug bolts and carefully remove the valve
body from the flanges.
●
Seam weld the entire flange / piping connection for
both flanges.
●
Let the piping components cool completely before re-
inserting the valve body.
●
Warning! Seam welding with the valve body installed
between the flanges can damage the liner due to heat
migration through the flange to the valve body.
HS (U) Series Butterfly Valves:
Storage of BF Valve assemblies
●
Assemblies must be stored indoors, protected from
the elements.
●
Materials received on jobsites that have long installation
lead times should receive extra protection from
construction damage.
●
Resilient seats must be protected from abrasion, cutting
and nicking, as this will damage the liner and may cause
flange area leaks.
●
Electric actuators cannot be stored in wet, damp
or caustic areas.
●
Do not store construction material on top of valve
assemblies.
Installation Practices:
●
HS (U) series butterfly valves are designed to be installed
between ANSI 125/150 flat-faced, raised face, slip-on
or weld neck flanges.
●
Valve should be installed a minimum of 10 pipe diameters
from upstream or downstream elbows, strainers,
pumps, etc.
●
For chilled water, condenser water or hot water
applications, the valve should be installed with the stem
in a vertical orientation, with the actuator mounted above
the valve.
●
For applications in which there is a possibility of sediment
in the flow, the valve should be installed with the stem in
a horizontal position and the bottom of the disc should
close FROM the downstream side, rather than from the
upstream side.
