REGULATING VALVE APPLICATIONS General Installation Guidelines
Outlet Port
Inlet Port
Strainers with Blowdown Valves Regardless of any filters provided on a regulator, a strainer with blowdown valve is recommended before (upstream of) all regulator installations. Pipeline debris and scale can damage internal valve components, potentially leading to poor operation and/or failure. Note: Consider strainer orientation to avoid collection of condensate (see diagram).
Blowdown valve below strainer ports
Blowdown valve oriented at same elevation as strainer ports to avoid condensate collection
Drip Legs & Steam Traps To prevent condensate accumulated during shutdown from possibly damaging the regulator or piping at start-up, an adequately sized drip leg with steam trap should be installed prior to all regulators. This will also help protect the regulator during normal operation. Note: Separators may be necessary when boiler carryover or “wet” steam is a concern.
Strainer
Strainer
Proper Start-up & Maintenance Procedures It is important to follow good start-up practices to avoid operational complications and potential system damage. Starting a steam system too quickly or using an improper sequence may lead to a potentially hazardous working environment. Lack of system maintenance over time can also contribute to this situation. It is imperative to develop proper start-up and maintenance procedures and train personnel on the importance of following them at all times. Consult equipment manufacturers for specific guidelines, if necessary.
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