Feedwater Control Valve

Off of many types of signals.

Feedwater control valve.

Steam conditioning valves prds turbine bypass valves. Surge tank make up water valve. Chemical feed pump valve. They are designed for the full feedwater volume of the steam generator and should produce as low a pressure gradient as.

Modulating feedwater valves allow for constant incremental adjustments to feed water into your boiler. The valve controls the supply of feed water to the boiler. Some typical applications are 0 135 ohm slide wires from a mcdonnell and miller 7b switch or a 4 20ma signal from a. Feedwater control valve supplied as either a straight pattern body or angle pattern body suitable for use in industrial applications.

They come in all types from ball valves to knife gates to globe valves and operate. Feed water control valves are one of the most important control components of the water steam circuit. The feedwater valves are normally sized to accommodate an operating condition that occurs when the safety valves open during a unit trip. A main feed water control valve is designed.

Customer oriented solutions at the highest levels of technology and competence 2 control valves in 1. The feedwater center controls a number of valves in order to maintain levels pressures flow rates within the system. It is critical not to allow the hrsg to dry out which can cause severe thermal damage to the boiler tubes and the drums. The valve s requirements are high.

Da psi control valve. Because there may be several different types the concepts are also different. 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. 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. 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. Feedwater control valves play a critical role in boiler operation. In some cases use of the startup valve may not be required if the rangeability of the main feed water control valves is adequate.

To protect against this the feedwater valves are sized for minimal pressure. The pressure drop across the valve should be minimized but still give a l good control characteristic.