Data Sheet for Product

HVAC Control Valves
Technical Bulletin
Document No. 155-801
June 19, 2013
Installation Best Practices
Siemens Industries, Inc.
Installation
• Be sure that the flow medium, ambient temperature and the selected location will not
exceed the maximum temperature of the valve, actuator, or accessories. Information can
be found in the product specifications and on the nameplate(s) regarding these limits.
• Follow good piping practices. Install a bypass around the valve. Install stop valves in inlet
and outlet piping to provide a means to isolate the valve.
• A straight run of pipe is recommended for 10 pipe diameters upstream of the valve and 20
pipe diameters downstream of the valve.
• Protect valve and downstream equipment with a self-cleaning strainer.
• Provide proper inlet and outlet drainage in steam service to prevent water hammer or
possible erosion in equipment.
• Install gauges in inlet and outlet piping to provide a means for checking adjustment and
operation.
• For maximum efficiency and minimum wear, install valve in a vertical position with the
stem pointing upward.
• Large actuators mounted in any position other than vertical must be supported
independently of the valves.
NOTE: Valves with large actuators (such as 8" and 12" pneumatic, SKB, SKC, SKD or
BFVs with large EPI actuators) should have additional stress relief support if being
mounted in vertical piping.
• Be sure to leave clearance to allow for actuator removal (See Dimensions & Weights
section of the actuator's Technical Specification Sheet for actuator removal clearance).
• Before installing, ensure that valve and piping are clean inside and free of scale, chips,
welding spatter, and foreign material. Thoroughly blow out or flush pipe lines.
• The valve must be installed with the fluid flowing in the correct direction(s). For proper
operation in all applications, control valves must be piped according to the corresponding
flow arrows, inlet markings, and port markings present on each valve.
• Pipes must be aligned squarely with the valve at each connection.
• If the valve has screwed ends, do not apply pipe dope to the threads of the valve body or
to the first two threads of the pipe.
• If the valve has flanged ends, tighten flange bolts evenly to prevent excessive stress and
the possibility of cracking.
• Final tuning may be required under actual operating conditions.
• Do not obscure flow arrow plates or nameplates with paint. If flow arrow plates or
nameplates will be covered with insulation, it is recommended the information on the
plates be transcribed on the outside of the insulation in the same location as the plate.