Description
Steam conditioning station RS 702 is single-seated control valve of a unit construction designed for water injection into the extended outlet. The pressure-balanced, multi-step throttling trim is designed to eliminate high differential pressures within the valve and ensure the low noisiness. It ensures a high resistance to wearing caused by medium flow and to effects of the expanding steam. Cooling water is injected into the extended outlet with a specially designed nozzle (VH or VHP) with changeable flow. The valve is equipped with "LIVE LOADING" packing. The valves can be supplied with weld ends possibly with flanges having the faces according to the customers´ requests.
The valves are actuated with linear electric actuators. The connection is designed for both domestic and foreign actuators of the following producers: ZPA Pečky, Regada, AUMA, Schiebel and Foxboro.

Application
The valves are designed for simultaneous pressure and temperature reduction of steam. They are especially designed for industrial applications such as low-pressure steam production in heating, steam circuit in power plants or technological processes. The max. permissible operating pressures correspond to EN 12 516-1.

Process media
The valves are designed to regulate the pressure and temperature of water vapour without mechanical impurities. The producer recommends to pipe a strainer into pipeline in front of the valve when impurities are present. Impurities can affect the quality and reliability of regulation and can cause a reduction of the valve service life.The application for other process media must be considered with respect to used material that is in contact with the process medium and therefore its usage should be consulted with the producer.

Technical data

Series	RS 702
Type of valve	Single-seated, control valves, straight-through, with pressure-balanced plug, with extended outlet and orifice plate at outlet and with injection of water into outlet pipeline
Nominal size range	Inlet DN 50 and 250, Outlet DN 100 to 600
Nominal pressure	Inlet PN 160 to 400, Outlet PN 16 to 320
Body material (including weld ends)	Cast steel 1.0619 (GP 240 GH)	Alloy steel 1.7357 (G17CrMo5-5)
Material of conection flanges	1.0425 (P 265 GH)	1.7335 (13CrMo4-5)
Seat material:	17 021.6 (1.4006)
Plug material:	17 023.6 (1.4078)
Operating temperature range	-20 to 400oC	-20 to 550oC
Connection flanges	For PN 16 to 100 Acc. to ČSN EN 1092-1 (2/2003) for PN 160 Acc. to DIN 2548 (4/1969); for PN 250 Acc. to DIN 2549 (4/1969); for PN 320 Acc. to DIN 2550 (4/1969); for PN 400 Acc. to DIN 2551 (4/1969)
Faces of connection flanges	DIN 2526 FORM E (3/1975) - plain-faced flanges
Weld ends	Acc. to ČSN 13 1075 (3/1991)
Control trim	One or two-step pressure reduction Perforated plug - seat (cage), orifice plate
Flow characteristic	Linear, equal-percentage
Kvs values	2,5 to 360 m3/hour
Leakage rate	Acc. to ČSN EN 1349 (5/2001) - Class III, execution with higher tightness - Class V
Packing sealing	Graphite - LIVE LOADING

Name	Catal. No. / version	Format and size
Steam-conditioning station RS 702	02-03.5 / 10.05.GB	(*.pdf, 838 kB)  Download