REGULATING VALVE APPLICATIONS
Regulator Application & Installation Notes
The following are considerations for all steam regulator installations, as system operation is dependent upon proper design, installation, start-up and maintenance procedures:
Inlet & Outlet Pipe Sizing Improperly sized piping can contribute to excessive noise in a steam system. Make certain inlet and outlet piping to the regulator is adequately sized for the flow, velocity and pressure requirements.
2-3 sizes larger than regulator outlet port
1-2 sizes larger than regulator inlet port
Inlet piping can be 1-2 sizes larger and outlet piping 2-3 sizes larger than the connection ports of a properly sized regulator.
Regulator
10 Pipe Diameters Minimum
Straight Run of Pipe Before and After the Valve Pipe fittings, bends and other accessories contribute to fluid turbulence in a system which can result in erratic control. To limit this and ensure optimum system operation, follow recommended guidelines for minimum straight run lengths of pipe before and after a regulator. Note: Any isolation valves or pipeline accessories should be full-ported.
10 Pipe Diameters Minimum
Reducer Selection Concentric pipe reducers should be avoided on the inlet side of regulators as they can allow entrained condensate to collect, potentially leading to damaging and dangerous waterhammer. Therefore, when reducers are required in the steam piping to accommodate properly sized valves and pipes, use e ccentric reducers on regulator inlets and concentric or eccentric reducers on regulator outlets.
Concentric Reducer
STEAM
Condensate accumulated at low point
Eccentric Reducer
STEAM
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