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Watson McDaniel Company HSP Valve Manual Rev3 2415800
Maintenance
Proper maintenance is significant for reliable operation of the valve. Frequency of cleaning and
maintenance performed are dependent on the conditions of the steam system.
A
General Service Inspection
1.
Inspect all connections for leaks and tighten as required.
2.
Blow down or clean the pilot and all pipe line strainers in the system.
3.
Verify the pressure is properly set after blow down and readjust if necessary.
Note: At a minimum, these maintenance operations should be performed a few days after the valve
has been initially installed and shortly after the start up during each heating season.
Orifices
There are 2 different orifices located on the Valve. The Tee Bleed orifice is located on the Pilot and
supplies a pressure relief path back to the main valve body. The end of the Tee with the orifice, which
has an indicator mark, should be installed with the orifice side up as shown in Figure 4. The Elbow
Diaphragm orifice is located outside the main valve body opposite of the diaphragm cover.
Figure 4: Orifice Locations