Original
By certification 
BRIEF DESCRIPTIONS
Pressure reducing desuperheater control system is suitable for middle pressure and temperature reduction purpose, basically, its design pressure is <10.0 MPa, design temperature is < 570 DegreeC, steam flow range is from 10% to 100%.
Pressure reducing desuperheater control system adopted with more flexible casting body of PRV with pilot plug design which gives higher stability and controlling performance during continuous operation under high pressure and temperature, which is widely used power plant, heating supply, chemical industries and other locations where the desuperheating steam needs.
DESIGN PRINCIPLE
Layout Drawing | ||
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Assemble Parts |
Basic Parameters |
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Pressure Reducing System |
Available inlet pressure: P1<10.0 MPa |
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Pressure Reducing Valve |
Available inlet temperature: T1<570 DegreeC |
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Orifice Plate |
Available Inlet flow rate: 10%~100% |
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Noise Level: <85 dbA |
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Desuperheater System |
Pressure Class |
Custom-design, |
Classical Venturi design | ||
Double Venturi Design | ||
Multiple Nozzle with Venturi Design | ||
Annular Nozzle with Venturi Design |
Size |
From DN200 to DN700 (8" to 28") |
Additional sizes on request |
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Feed Water Control System |
Design Temperature |
Maximal. 570 Degree C |
Feed Water Control Valve | ||
Strainer and Globe Valve |
Actuator |
Pneumatic |
Check Valve |
Other actuators on request |
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Electric |
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Safety System |
Installation |
Horizontal |
Safety Valve |
Connection |
Flange (ASME B16.5) |
Butt weld (Acc to request) |
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Instruments System |
Valves |
SA-216 WCB |
Pressure Gauge |
SA-217 WC6 |
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Thermometer |
SA-217 WC9 |
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Pressure Transmitter |
Additional Materials on request |
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Thermocouple |
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Pipes |
SA-106B |
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Others Parts |
SA-355 P11 |
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Connection Pipe |
SA-355 P22 |
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Counter Flange and Fastens |
SA-355 P91 |
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Additional Materials on request |
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Applications |
Apply Standards |
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Power plant requirements for desuperheated steam |
NB/T47033-2013 |
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supplying units having limited operating temperatures. | ||
Control steam temperature and pressure to dryers in paper industry and sugar mills industry | ||
Reduction and control of superheated steam,where excess temperatures will harm the product | ||
PRESSURE REDUCING & DESUPERHEATING PART
Basic Control | |
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Main Parts | |
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LY943Y HP Steam Pressure Reducing Valve LY943/643Y cage-guided pressure reducing valve is a pressure balancing control valve especially designed for WY601/602 PRDS. The maximal size of LY943Y can be reached DN600, which is able to used for bigger flow rate needs and gives the higher adjusting range and precise controlling under maximal flows conditions. For the trim design, the cage guided construction with balancing features provides the valves that meet low noise and anti-cavitation requirements. |
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Venturi Concept and Multiple Nozzle Cooling water flow is controlled by a feed water control valve which responds to changes received from temperature controller or temperature control system. The water then passed through the main tube of desuperheater to the spray nozzle and discharges into header as a fine spray. By controlling the flow through the spray nozzles and maintaining proper header velocities, good reliable temperature is obtained. | |
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Feed Water Control Valve The desuperheaters reduce steam temperatures by introducing cooling water directly into the hot steam. After sufficient time, all of the liquid is vaporized, resulting in final Feed water control valve is one of the most important control components of the feed water line, it controls the supply of feed water to the nozzles, the commonsense is the high performance of feed water control valve with accurate flow and pressure controlling is the priority concern for the operation of desuperheater. (Details please find control valve brochure) |
Layout | |
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SIZE AND DIMENSION
DRAWING |
No |
Item Name |
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1 |
Pressure Reducing Valve |
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2 |
Multipe Nozzle |
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3 |
Steam Pipeline |
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4 |
Safety Valve |
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5 |
Pressure Gauge |
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6 |
Bimetal Thermometer |
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7 |
Globe Valve |
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8 |
Strainer |
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12 |
Check Valve |
11 |
Feed Water Control Valve |
10 |
Throttle Valve |
9 |
Orifice Plate |
No |
CODE |
PRESSURE REUDCE VALVE |
STEAM PIPE OUTLET |
WATER CONTROL VALVE |
SAFETY VALVE |
1 |
CGWY601 |
DN50 |
DN50 |
DN80 |
DN20 |
2 |
CGWY601 |
DN80 |
DN65 |
DN100 |
DN25 |
3 |
CGWY601 |
DN100 |
DN80 |
DN150 |
DN32 |
4 |
CGWY601 |
DN125 |
DN100 |
DN200 |
DN40 |
5 |
CGWY601 |
DN150 |
DN150 |
DN250 |
DN50 |
6 |
CGWY601 |
DN175 |
DN200 |
DN300 |
DN65 |
7 |
CGWY601 |
DN225 |
DN250 |
DN80 |
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8 |
CGWY601 |
DN250 |
DN300 |
DN100 |
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9 |
CGWY601 |
DN350 |
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10 |
CGWY601 |
DN400 |
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11 |
CGWY601 |
DN500 |
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12 |
CGWY601 |
DN600 |
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13 |
CGWY601 |
DN700 |
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14 |
CGWY601 |
DN800 |
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