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High Pressure Reducing Device

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Product:	Views:482High Pressure Reducing Device
Unit price:	Negotiable
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Delivery date:	Since the payment date Days delivery
Valid until:	Long-term effective
Last updated:	2021-01-23 20:42

Details

BRIEF DESCRIPTIONS

Pressure Reducing and Temperature Reducing Device is the ultimate selection for high pressure and temperature steam reduction service, the system employs many advanced concept and benefits to offer with best solution with effective performance of high pressure and temperature conditions.

Pressure Reducing and Temperature Reducing Device adopted with highly pressure rated forged body of PRV with pilot plug design which gives supreme stability and controlling performance during continuous operation under high pressure and temperature, its design pressure is <14.0 MPa, design temperature is < 570 DegreeC, steam flow range is from 10% to 100%.

DESIGN PRINCIPLE

Layout

Assemble Parts	Basic Parameters
Pressure Reducing System	Available inlet pressure: P1<14.0 MPa
Pressure Reducing Valve	Available inlet temperature: T1<570 DegreeC
Orifice Plate	Available Inlet flow rate: 10%~100%
	Noise Level: <85 dbA
Desuperheater System
Classical Venturi design	Pressure Class	Custom-design, Acc to specifications
Double Venturi Design
Multiple Nozzle with Venturi Design
Annular Nozzle with Venturi Design	Size	From DN200 to DN700 (8" to 28")
	Size	Additional sizes on request
Feed Water Control System	Design Temperature	Maximal. 570 Degree C Higher temperature on request
Feed Water Control Valve	Design Temperature	Maximal. 570 Degree C Higher temperature on request
Strainer and Globe Valve	Actuator	Pneumatic
Check Valve		Other actuators on request
		Electric
Safety System	Installation	Horizontal
Safety Valve	Connection	Flange (ASME B16.5)
	Connection	Butt weld (Acc to request)
Instruments System	Valves	SA 105
Pressure Gauge		SA 182 F11
Thermometer		SA 182 F22
Pressure Transmitter		SA 182 F91
Thermocouple		Additional Materials on request
	Pipes	SA-106B
Others Parts		SA-355 P11
Connection Pipe		SA-355 P22
Counter Flange and Fastens		SA-355 P91
		Additional Materials on request
Applications	Apply Standards
Power plant requirements for desuperheated steam	NB/T47033-2013 <Pressure Reducing Desuperheater System> Manufacturing acc. to ASME IBR, CE certificated on request
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

Main Parts
	NY963Y HP Steam Pressure Reducing Valve Vital to the safe and efficient operation of a power plant, the NY963/663Y Series pressure reducing valve has been designed for ultimate reliability. It employs many new technology with advanced procession method to ensure the best performance for high pressure and temperature service.
	Venturi Concept and Multiple Nozzle The venturi design is based on a sophisticated concept. The upstream steam comes from venturi chamber with accelerated velocity, which turns the spray water and flows with it through the mixing module where steam and water meld together with very high contacting efficiency. The design brings many advantages including minimal pressure drop, shorter installation length and higher range ability, also there is no moving parts which ensure the stability and low maintenance cost in future operation.
	Feed Water Control Valve The most excellent of cage guided control valve is its balance characteristic, for plug balance port’s function, fluid pressure acted on static unbalance force of plug, it reduced unbalance force, then valve can be configured actuator smaller than conventional control valves. With balance type characteristic, LT661Y/961Y feed water control valve is designed to focus on high pressure drops, effectively reduce the effects of cavitation and the noise in the high pressure drops services which is especially suitable for feed water application. (Details please find control valve brochure)
Layout

SIZE AND DIMENSION

DRAWING						No	Item Name
						1	Pressure Reducing Valve
						2	Multipe Nozzle
						3	Steam Pipeline
						4	Safety Valve
						5	Pressure Gauge
						6	Bimetal Thermometer
						7	Globe Valve
						8	Strainer
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	GWY601	DN50	DN50	DN80	DN20
2	GWY601	DN80	DN65	DN100	DN25
3	GWY601	DN100	DN80	DN150	DN32
4	GWY601	DN125	DN100	DN200	DN40
5	GWY601	DN150	DN150	DN250	DN50
6	GWY601	DN175	DN200	DN300	DN65
7	GWY601	DN225	DN250		DN80
8	GWY601	DN250	DN300		DN100
9	GWY601		DN350
10	GWY601		DN400
11	GWY601		DN500
12	GWY601		DN600
13	GWY601		DN700
14	GWY601		DN800

Multiple Nozzle Technology
	Brief HZVALVE has incorporated the latest technology in the multiple spray nozzle design. The high quality spring loaded nozzle was employed and assembled with desuperheaters to atomize the water droplets and produce the heat transfer contact area necessary for cooling the steam so that to bring steam and water to meld together with very high contacting efficiency.
Principle The spray water enters the nozzle chamber through multiple tangentially drilled holes, thereby causing water to swirl within the nozzle chamber. The spring, which is pre-compressed to a certain set pressure, keeps the nozzle plug pressed against the seat. As soon as the pressure differential between the water & steam exceeds the set pressure, the plug lifts from its seat and the spray water exits through the small circumferential opening, in the form of a fine mist. Number of nozzles, spring range and spring set pressure is selected based on the process specifications. The spray water quantity is controlled by an external control valve which responds to feedback from a controller and downstream temperature sensor.
	No	Part Name	No	Part Name	No	Part Name
	1	Adjust Nut	5	Nozzle Body	9	Nut
	2	Spring	6	Nozzle Shaft	10	Bolt
	3	Nozzle Hole	7	Nozzle Holder	11	Counter Flange
	4	Swirl-Chamber	8	Gasket	12	Flange
Features ●The special swirl-chamber, spring-loaded design maintains an excellent spray pattern and atomize water into a very fine mist. ●The high quality surface finish minimises frictional losses, thereby ensuring that the total pressure difference between water and steam is available for atomisation of water. ●Wide range of Kv / Cv values selection are offered by using special nozzlecombinations. ●Set pressure & spring range selection ensures sequential opening of the individual nozzles. ●The nozzle is screwed then seal welded into a nozzle holder, easy to be maintained and replaced.

Multiple Nozzle Technology
	Nozzle Testing Device The company has an adjustable multiple nozzle test device. After the nozzle is polished and assembled, each nozzle will be carried out opening and atomizing testing before installing into desuperheater. The device is composed of water spray frame, air storage tank, pressure gauge, control device, etc. it can test multi specification and multi series nozzles with different flow rate, so as to ensure that each set of nozzle has undergone strict atomization opening test before leaving the factory, and ensure the excellent atomization effect and reliability of the nozzle.
The conventional opening value is 0.1 ± 0.01Mpa	Over (30%~50%) of opening pressure

The spray water enters the swirl chamber with high velocity, gives an excellent spray pattern to optimizes the cooling liquid particle size and atomize water into a very fine mist so that quick evaporation can take place.

http://www.desuperheating.com/

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