Install Instructions

3
10/20 - Subject to change. © Belimo Aircontrols (USA), Inc.
71161-00001.F
Flanged Globe Valves 2½” to 6”
Installation Instructions
Warning!
Valve should not be used for combustible gas applications. Gas leaks
and explosions may result. Do not install in systems which exceed the
ratings of the valve.
• Avoid installations where valve may be exposed to excessive
moisture, corrosive fumes, vibration, high ambient temperatures,
elements, or high trafc areas with potential for mechanical damage.
• Valve assembly location must be within ambient ratings of actuator.
If the temperature is below -22°F, a heater is required.
• The valve assembly will require heat shielding, thermal isolation, or
cooling at the actuator if combined effect of medium and ambient
temperatures (conduction, convection, and radiation) is above 122°F
for prolonged time periods.
• Strainers should be installed before coil and valve.
• Visual access must be provided. Assembly must be accessible for
routine service. Contractor should provide unions for removal from
line and isolation valves.
• Avoid excessive streses. Mechanical support must be provided where
reducers have been used and the piping systems may have less
structural integrity than full pipe sizes.
• Vertical pipes with valves and dual actuators may require support for
linkage.
• Sufcient upstream and downstream piping runs must be provided
to ensure proper valve capacity and flow response. Five diameters in
each direction are reccomended.
• Life span of the valve stems and packing is dependent on
maintaining non-damaging conditions. Poor water treatment or
ltration, corrosion, scale or other particulate can result in damage to
trim components. A water treatment specialist should be consulted.
1. Inspect shipping package, valve, linkage, and actuator for
physical damage. If shipping damage has occurred, notify
appropriate carrier. Do not install.
2. If this is a replacement, remove the existing valve, linkage, and
actuator from the piping system.
3. If actuator and linkage are removed, they must be reinstalled
correctly. The actuator must be rotated so that the valve seats
properly for close-off.
4. Install valve with the proper ports as inlets and outlets. See
piping charts on next page. Check that inlet and outlet of 2-way
valves are correct; check that the “A”, “B”, and “AB” ports of
3-way valves are piped correctly. Flow direction arrows must be
correct.
5. Blow out all piping and throughly clean below valve installation.
6. clean male pipe threads with wire brush and rag. If threads have
been damaged or exposed to weather, running a tap or die over
the threads may straighten them. Clean pipes, threads, and
valve threads before installation. Check for any foreign material
that can become lodged in trim components. Strainers should
be cleaned after initial startup.
7. Pipe sealing compound may not be applied to either flange
or gasket.
8. Flanged bodies must be used with flanges which are rated
for the service. 125 lb. flanges have flat faces and may not be
bolted to raised face flanges. Gaskets rated for the medium and
temperature-pressure must be used.
9. Valve must be installed with the stem towards the vertical, not
below the horizontal.
10. Tighten bolts alternatively and evenly around the flange.
11. 2-way valve Normally Open (NO) or Normally Closed (NC)
congurations must be veried by examining both the
mechanical drawings and the valve and actuator.
12. 3-way valve Normally Open (NO) or Normally Closed (NC)
congurations for the control port and the bypass port must
be veried by examining both the mechanical drawings and the
valve and actuator.
Check specications for every application to be sure of ports and
designations.
U, L, and C designations
U is for Upper, the control port.
L is for Lower, the bypass port.
C is for Common.
Viewed with the bonnet upwards ad the U port on the left, the L port is
the bottom port, and the C is the right port. With the stem up, L is open to
Common. With the stem down, U is open to Common.
Safety Notes
WARNING: This product can expose you to lead which is known to the State of
California to cause cancer and reproductive harm. For more information go to
www.P65Warnings.ca.gov