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AERCO Belimo F7...HD/HDU Series Valve User Manual

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7/10 - Subject to change. © Belimo Air

controls (USA), Inc.

Storage of Butterfly Valve Assemblies

● Assemblies must be stored indoors, protected from the elements.
● Materials received on job sites that have long installation lead

times should receive extra protection from construction damage.

● Resilient seats must be protected from abrasion, cutting and nick-

ing, 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

● HD(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 down-
stream side, rather than from the upstream side.

● 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 HD(U) series BF valves. (Fig. 1a)
● Follow the recommended flange bolting sequence. (Fig. 8, pg. 85)
● 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.

● Install the valve with the disc in the “Almost Closed” position (Fig. 1)
● Do not use any flange gaskets (Fig. 1a)
● Make sure the valve liner and flange internal diameters are in

alignment. (Fig. 2)

● Take valve body / flange pair assembly and align with piping ends.
● TACK weld the flanges to the piping in several places. (Fig. 3a)

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.

(Fig 3b)

● Let the piping components cool completely before re-inserting the

valve body. (Fig. 4)

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.

Installation Recommendations
F6…HD(U), F7…HD(U) Series Butterfl y Valves

HD(U) Series Butterfl y Valves

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