Feedwater control valves are used for start up and main feed water control. These two functions are integrated in the combined feed water control valve. The delivery range also includes separate control valves. One of the special features of these types of valves is the trim design in which control of fluid velocities is maintained under all operating flow conditions. This approach practically eliminates cavitations, which is likely to occur during startup, or under low flow conditions, when the DP across the valve is significantly higher than normal flow conditions. Essentially, the trim is made up of disks, which are multi-stage, multi-path flow controlling elements. In the case of feed water control valves, fine control is required at low flows and high DP's and, at full load with high flow low and DP.

Feed water pump is used to pump water into a steam boiler. The water may be freshly supplied or returning condensate produced as a result of the condensation of the steam produced by the boiler. These pumps are normally high pressure units that use suction from a condensate return system and can be of the centrifugal pump type or positive displacement type. Feed water pumps range in size up to many horsepower and the electric motor is usually separated from the pump body by some form of mechanical coupling. Feed water pumps usually run intermittently and are controlled by a float switch or other similar level-sensing device energizing the pump when it detects a lowered liquid level in the boiler. The pump then runs until the level of liquid in the boiler is substantially increased.

Feeler Gauge Stock is packaged in convenient coils with dispenser clip for safety and utility. Its coils are 1/2″ x 25' with edges rounded, honed and the gage thickness is etched every 12″. It is made from the highest quality 1095 tempered spring steel. It is available with special lengths such as .001, .0015 and .002.