Quality That Lasts.

Spool type:

three way double seat spool 

Nominal size:

DN20~300 NPS 3/4〞~   12〞

Nominal pressure:

PN16 ~ 100、 CLASS   150LB ~ 600LB

Connection: flange:

FF、RF、MF、RTJ

Welding:

SW、BW

Flange dimension:

According to to IEC 60534

Pneumatic 3 way diverting regulating   valve Bonnet type:

Ⅰ:standard type（-20℃~230℃）
  Ⅱ:Radiator type: （-45℃~ high than 230℃ occasion）
  Ⅲ:Low temperature extended type（-196℃~ -45℃）
  Ⅳ:Bellow seal type
  Ⅴ:Warm insulation Jacket type

Packing:

V type PFTE packing, flex. graphite   packing, etc.

Gasket:

Metal graphite packing

Pneumatic Control valve Actuator:

Pneumatic:multi-spring diaphragm   actuator, piston type actuator.

Body/Bonnet

WCB/WCC/WC6/CF8/CF8M/CF3M

Valve spool/Seat

304/316/316L(overlaying stellite alloy)

Packing

Normal:-196～150℃ is   PTFE,RTFE,>230℃ is flexible graphite

Bellow

304,316,316L

Gasket

Normal:Stainless steel with flexible   graphite,Special:Metal tooth type gasket

Stem

2Cr13/17-4PH/304/316/316L

Diaphragm Cover

Normal:Q235,Special:304

Diaphragm

NBR with reinforced polyester fabric

Spring

Normal:60Si2Mn,Special:50CrVa

Allowable range

 30: 1

Rated Cv value

Percentage / linear CV8.5~1280

Pneumatic 3-way control valve 
  Allowable leakage

Metal seal:  IV grade（0.01% rated capacity）
  Leakage standard:  GB/T 4213

Pneumatic 3 way diverting regulating   valve Performance

Intrinsic error(%)

±1.5

Return difference(%)

≤1.5

Dead zone(%)

≤0.6

Difference from beginning to end point(%)

±2.5

Rated travel difference(%)

≤2.5

Special treatment

Trim nitrogen treatment, seat hard alloy   treatment.

Special rinse

Degreasing and dehydration treatment

Special condition

Special piping or connection, vacuum   condition, S.S fastener, special coating.

Special dimension

Customized face to face length or   dimension

Test and inspection

Third party test report

ZH23～ZH56

Multi-spring type

Usage

Regulating type, ON-OFF type

Air supply pressure or Power supply   voltage

Air supply pressure (Spring range)
  140（20～100）Kpa G
  240 (40～200) Kpa G
  280 (80～240) Kpa G

Connector

Air pipe connector: RC1/4

Direct action

Pressure increase, stem descend, valve   close.

Reaction

Pressure increase, stem ascend, valve   open.

Input signal

40～20mA.DC（with positioner）

Lag

≤1%FS（with   positioner） 

Linear type

2%FS（with positioner）

Environmental temperature

-10℃～+70℃

Pneumatic diverting three way control   valve
  Accessories

E/P, P/P valve positioner, filter   regulator, valve converter, solenoid valve, limited switch
  Non-standard accessories, need special customized notes.

Rated flow coefficient, CV

8.5

13

21

34

53

85

135

210

340

535

800

1280

Nominal size

Travel

Option flow coefficient Cv（★standard ●recommended）

DN25

16 mm

★

DN32

25 mm

★

DN40

●

★

DN50

●

●

★

DN65

40mm

★

DN80

●

★

DN100

●

●

★

DN125

60mm

★

DN150

●

★

DN200

●

●

★

DN250

100mm

●

●

★

DN300

●

●

★

Pneumatic actuator
  Diaphragm area, Ae (cm2)

ZHA/B-23

ZHA/B-34

ZHA/B-45

ZHA/B-56

350

560

900

1600

Action

Spring range

Pneumatic 3 way diverting regulating   valve
  Metal sealing allowable pressure difference（MPa）

Air open

20-100KPa

0.7

0.44

0.28

0.18

0.17

0.11

0.07

0.07

0.05

0.03

0.05

0.03

40-200 KPa

2.14

1.31

0.84

0.53

0.51

0.33

0.21

0.22

0.15

0.09

0.11

0.07

80-240 KPa

4.99

3.05

1.95

1.25

1.18

0.78

0.5

0.51

0.36

0.21

0.21

0.15

Air close

20-100KPa

2.14

0.87

0.56

0.35

0.34

0.22

0.14

0.15

0.1

0.06

0.05

0.03

40-200 KPa

6.4

5.86

3.64

2.3

2.21

1.43

0.91

0.95

0.66

0.37

0.11

0.07

80-240 KPa

6.4

6.4

5.04

3.18

3.06

1.98

1.26

1.32

0.92

0.52

0.21

0.15