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CYa43H Series Pilot Operated Pressure Reducing Valve
CYa43H Series Pilot Operated Pressure Reducing Valve
 

 

Applications 

The valve is pilot operated piston type and suit to install in the steam lines 

with the high capacity of flow, such as industrial production facility 

and building facility.

Features   

 It is performed and controlled constantly by adopting piston guide 

construction and specia seal ring.

● Possible to install in a line for wide range of pressure and capacity.

● Easy pressure adjustment by manual handle with automatic lock mechanism.

● Compact design.

 

 Materials of main parts

 Technical specification     

Item Parameter
Resistance pressure (MPa) 1.6 2.5 4
Shell test pressure (MPa) 2.4 3.75 6
Seal test pressure (MPa) 1.6 2.5 4
Max. inlet pressrure (MPa) 1.6 2.5 4
Outlet pressure range (MPa) 0.04-1.0 0.05-1.6 0.08-2.5
Pressure characteristics derivation (MPa) GB 12246~1989
Flow characteristics derivation (MPa) GB 12246~1989
Leakage (ml/min)  GB 12245~1989
Min. pressure differential (MPa) 0.07 0.1 0.15
Max. reducing rate 20:01
Type of connection Flanged RF FM RJ

 

 

 

 

 

 

 

 

 

Dimension

DN

L

H

H1

1.6/2.5MPa

4.0 MPa

15

160

180

265

85

20

160

180

265

85

25

180

200

280

95

32

200

220

280

95

40

220

240

290

105

50

250

270

300

130

65

280

300

315

145

80

310

330

330

170

100

350

380

405

200

125

400

450

450

225

150

450

500

485

265

200

500

550

570

290

250

650

640

325

300

800

740

360

350

850

810

395

400

900

950

430

500

950

1080

500

 

 

 

  

Parts Material
Body & Cover WCB
Seat & Disc & stem 2Cr13
Piston aluminum-iron bronze
Spring of main valve 50CrVA
Spring of pilot valve 51CrVA
Diaphragm 1Cr18Ni9
Adjusting spring 60Si2Mn
Piston ring Contrapositional polyphenylene

 

Flow coefficient (Cv)

Orifice size (mm)

50

65

80

100

125

150

200

250

300

350

400

500

Cv

24

30

50

85

130

190

300

480

680

925

1150

1900

 

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