Feedwater Control Valve

Because there may be several different types the concepts are also different.

Feedwater control valve.

Feedwater control valves regulate the feedwater flow to the steam generator. A properly designed feedwater control valve with high rangeability allows for a better overlap between the startup valve and the main feed water control valves during transitions between the two valves. They are designed for the full feedwater volume of the steam generator and should produce as low a pressure gradient as. Chemical feed pump valve.

Steam conditioning valves prds turbine bypass valves. They come in all types from ball valves to knife gates to globe valves and operate. The feedwater center controls a number of valves in order to maintain levels pressures flow rates within the system. Models include the mark 33 in sizes 1 4 through 2 dn8 through dn50 the high flow mark 331 332 with cv s up to 70 60 34 kv and the mark 39 with.

Modulating feedwater valves allow for constant incremental adjustments to feed water into your boiler. It is critical not to allow the hrsg to dry out which can cause severe thermal damage to the boiler tubes and the drums. To protect against this the feedwater valves are sized for minimal pressure. Feedwater control valve supplied as either a straight pattern body or angle pattern body suitable for use in industrial applications.

Feedwater control valves play a critical role in boiler operation. Da psi control valve. Feed water control valves are one of the most important control components of the water steam circuit. In some cases use of the startup valve may not be required if the rangeability of the main feed water control valves is adequate.

Surge tank make up water valve. The following valves can be maintained. The feedwater valves are normally sized to accommodate an operating condition that occurs when the safety valves open during a unit trip. Some typical applications are 0 135 ohm slide wires from a mcdonnell and miller 7b switch or a 4 20ma signal from a.

The valve s requirements are high. Boiler feedwater the mark 33 is a motor operated valve featuring the jordan sliding gate seat and heavy duty industrial motors for proportional resistance on off 4 20 ma electronic control. Full load control valves are installed in the main feedwater line. One important parameter of their design is the pressure drop at the rated condition as well as off design conditions.

The pressure drop across the valve should be minimized but still give a l good control characteristic. Off of many types of signals.