Temperature and Pressure Reduction Device System
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Price:
Negotiable
- minimum:
- Total supply:
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Delivery term:
The date of payment from buyers deliver within days
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seat:
Zhejiang
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Validity to:
Long-term effective
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Last update:
2020-10-17 13:17
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Browse the number:
472
Company Profile
Hangzhou Worldwides Valve Co., LtdBy certification [File Integrity]
Contact:huahuifamen(Mr.)
Email:
Telephone:
Phone:
Area:Zhejiang
Address:Zhejiang
Website:http://www.desuperheating.com/ http://huahuifamen.apexmould.net/
Product Details
BRIEF DESCRIPTIONS
Bypass high Pressure Reducing System is the pressure reducing desuperheater system for turbine bypass applications, also called turbine bypass PRDS. It is one of the most critical systems in the power plant, allowing operation of the boiler independent of the turbine and also providing steam at the same pressure and temperature as the turbine steam expansion process. With this capability, the Bypass high Pressure Reducing System is used in start-up and rapid ramp down modes, protecting the turbine, boiler and condenser from damaging thermal and pressure excursions.
BASIC PARAMETERS |
FEATURES |
Available inlet pressure: P1<17.0 MPa Available inlet temperature: T1<570 DegreeC Available Inlet flow rate: 10%~100% Outlet pressure controlling accuracy: P2<0.98 MPa, accuracy range: ±0.04MPa 0.98 MPa<P2<3.82 MPa, accuracy range: ±0.06MPa P2>3.82 MPa, accuracy range: ±0.15MPa Outlet temperature controlling accuracy: ±4 DegreeC Noise Level: <85 dbA |
Apply with forged pressure reducing valve of angle structure, designed specifically to handle severe thermal shock conditions normally associated with turbine bypass applications. Multi-stage piston trim design gives rapid start-up and shut off capacity, the piston is guided in two areas, with long guiding surfaces and not subject to distortion. High performance and quick operation pneumatic actuator or Electro-hydraulic actuator is selected, which gives quick action in 5 seconds or even less time for PRDS moving into operation The multi nozzles provide excellent atomization over a wide range of spray flows. The design optimizes the cooling liquid particle size so that quick evaporation can take place. The high performance feed water control valve is assembled and gives accurate water supplying to the spray nozzles for desuperheating. |
RECOMMENDATIONS | |
Minimum distance of Temperature Sensor from the point of water injection should be 10 to 12 mtrs It is recommended to install a strainer of 0.8 mm mesh before water control valve Spray water should be very clean (equivalent to boiler feedwater) Instrument quality air is required Inlet isolation valve is needed Floor support to safety valve is needed |
DESIGN PRINCIPLE
Layout | ||
Assemble Parts |
Basic Parameters |
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Available inlet pressure: P1<17.0 MPa | ||
Desuperheater System |
Noise Level: <85 dbA |
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Classical Venturi design | ||
Double Venturi Design |
Pressure Class |
Custom-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 |
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Pressure Gauge |
SA 105 |
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Thermometer |
SA182-F11 |
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Pressure Transmitter |
SA182-F91 |
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Thermocouple |
Additional Materials on request |
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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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Bypass high Pressure Reducing System is applicable for turbine bypass applications, allowing operation of the boiler independent of the turbine and also providing steam at the same pressure and temperature as the turbine steam expansion process. |
NB/T47033-2013 |
PRESSURE REDUCING & DESUPERHEATING PART
Basic Control | |
Main Parts | |
NY963Y |
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Desuperheating Design | |
Venturi Concept |
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Multiple-Nozzle Design |
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Special Spray Effect |
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Feed Water Control Valve | |
High Performance Multiple Cage Control Valve (Details please find control valve brochure) |
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Layout | |
SIZE AND DIMENSION
DRAWING |
No |
Item Name |
1 |
Steam Condition Valve |
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2 |
Multipe Nozzle |
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3 |
Check Valve |
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4 |
Steam Pipe |
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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 |
Throttle Valve |
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9 |
Control Valve |
No |
CODE |
PRESSURE REUDCE VALVE |
STEAM PIPE OUTLET |
WATER CONTROL VALVE |
SAFETY VALVE |
1 |
PWYK01 |
DN50 |
DN50 |
DN80 |
DN20 |
2 |
PWYK01 |
DN80 |
DN65 |
DN100 |
DN25 |
3 |
PWYK01 |
DN100 |
DN80 |
DN150 |
DN32 |
4 |
PWYK01 |
DN125 |
DN100 |
DN200 |
DN40 |
5 |
PWYK01 |
DN150 |
DN150 |
DN250 |
DN50 |
6 |
PWYK01 |
DN175 |
DN200 |
DN300 |
DN65 |
7 |
PWYK01 |
DN225 |
DN250 |
DN80 |
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8 |
PWYK01 |
DN250 |
DN300 |
DN100 |
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9 |
PWYK01 |
DN350 |
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10 |
PWYK01 |
DN400 |
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11 |
PWYK01 |
DN500 |
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12 |
PWYK01 |
DN600 |
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13 |
PWYK01 |
DN700 |
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14 |
PWYK01 |
DN800 |
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