40
70103-00001D
-
03/08
-
Subject
to
change.
©
Belimo
Air
controls
(USA),
Inc.
Installation Recommendations
F6HS(U)…, F7HS(U)… Series Butterfly Valves
Correct
Disc positioned in the almost
closed position. Pipe flange
spread allows sufficient room
for valve.
Incorrect
Disc opened beyond valve
body face. Pipe flanges not
spread sufficiently.
Figure 1: Initial Installation of Valve
evenly to assure uniform compression. In assembling flange
joints, the resilient seating surface shall be uniformly com-
pressed to the proper minimum dimension as shown in the
detail drawing below.
4. If an actuator is to be used, air hoses or electricity should be
connected to the unit as specified by the actuator manufacturer.
5. Cycle the valve to the fully open position, then back to the fully
closed position, checking the actuator travel stop
settings for proper disc alignment. The valve should be
operated to assure that no binding is taking place.
6. The valve is now ready for operation.
Remember: Install the valve with the disc in the “ALMOST
CLOSED” position. Do not use any flange gaskets.
Valve Body
Valve Body
EPDM Liner
ANSI Flange
Valve Disc
(Almost closed during assembly)
Do NOT tighten the ANSI flange against raised
face of valve body as this will deform the
EPDM liner due to over compression. Maintain
proper clearance on both sides of valve body
and at all bolting locations around valve body.
Distance between valve body
raised face and ANSI flange should be between
0.025" and 0.050" at all points (thickness
of credit card) when flange bolts are
properly tighten
EPDM Liner
Raised Face
ANSI Flange
90
90
10
DANGER
ACCEPTABLE
PREFERRED
Note: Actuator must
be mounted at or
above pipe centerline
for all actuator types.
