Serving the industry since 1952

Valves

All package boiler systems require a variety of valves that each serve a different purpose in order to guarantee safe operation. Valves that are commonly seen on one of our boiler solutions include Control Valves, Check Valves, Gate Valves, Globe Valves, and Relief Valves. Halgo Power usually includes all valves required by ASME Power Boiler Code on each project and selects them based on the specified temperature, pressure, and flow requirements. The valve material is also carefully selected based on the type of fluid that is to be transported through the piping system.

Control
Control Valves are valves used in a pipe to regulate operating conditions such as flow, pressure, and temperature. The valve is actuated electrically or pneumatically to maintain a desired set point in response to a process signal. The actuator adjusts the valve position accordingly and responds to changes in pipe conditions, allowing the system to maintain the desired upstream and downstream properties. Halgo Power typically offers control valves for applications including but not limited to boiler feedwater, continuous blowdown, desuperheater/attemperator and steam venting.
Check
Check valves are valves that only allow fluid to flow in one direction through a piping system. They actuate autonomously and there is no required external input or control. Most check valves are installed to protect equipment or a process from a reversal of flow in a pipeline. Types of check valves offered include but are not limited to stop-check valves, swing check valves, lift check valves, and diaphragm check valves.
Gate
Gate Valves are basic valves that are used to allow, restrict, or avert fluid flow in a pipe. The valve is manually actuated by turning a wheel. The rotational motion of the wheel is translated to linear motion through the use of a threaded shaft that removes a “gate” from the flow path, allowing fluid to pass. Common applications for Gate Valves within a boiler system include but are not limited to feedwater supply, boiler blowdown, economizer isolation, and deaerator isolation.
Globe
Globe Valves are basic valves used to allow, restrict, or avert fluid flow in a pipe. The valve is manually actuated by turning a wheel. The rotation motion of the wheel is translated to linear motion through the use of a threaded shaft that removes a “plug” from its seating within the valve, allowing fluid to pass. Common applications for Globe Valves within a boiler system include but are not limited to feedwater supply, boiler blowdown, economizer bypass and steam vent.
Relief Valves
Relief Valves are valves that serve to alleviate and/or maintain pressure in a vessel or piping system so that the equipment is not subjected to stresses greater than the design limits. The Relief Valve is set to a pre-determined pressure that is specific to each application, and it routes the diverted high pressure fluid to atmosphere or an auxiliary low pressure line. The valve self-actuates when the vessel or pipe pressure reaches the set-point and displaces the valve seat, allowing the Relief Valve to become the path of least resistance. Relief valves are an essential safety feature of most pressurized systems.