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Pneumatic Film Two-Seat Regulating Valve

Products > Pneumatic valve series > Pneumatic Film Two-Seat Regulating Valve

Pneumatic Film Two-Seat Regulating Valve

Product Model: ZXN
Body Material: WCB, 304,316,316L
Connection: Flange, Threaded, Welded
Seat Forms: Single Seat, Two-seat, The Sleeve
Pneumatic Actuators: Multi-spring Diaphragm Actuator
Attachment: Electropneumatic Positioner Equipment, Air Filter Pressure Reducing Valve, Hand Wheel, Security Valve
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【 Features 】

 1, The top of the bottom, double-oriented two-seat control valve, the work of good stability. 
 2, There are two spool and seat, the use of "four-way" valve body, can be easily modified by the anti-installed, air valve closed valve. 
 3, The valve body according to the principle of hydrodynamic design of the cross-section low flow resistance flow, the rated flow coefficient. 
 4, The imbalance is small, allowing the use of greater pressure. 
 5, The implementation of institutions with multi-spring structure, a height reduction of 30%. Weight reduction by 30%. 
 6, Adjustable range, the inherent adjustable ratio of 50%. 
 7, ZXNV bellows sealed valve on the movement of the stem to form a complete seal, blocking fluid leakage.

 8, ZXNJ-type control valve with a jacket, for fluid cooling after crystallization, solidification caused by the occasion of clogging.

 

[Connection Standard] 

ZXN Pneumatic FilmTwo - Seat Valve Flange Standard

Cast iron flange by JB78-59; cast steel flange by GB9113-88, JB / T79.1-94

Flange Seal Type

PN10, PN16 for the convex; PN40, PN64 for the convex surface, the valve body for the concave. Structural length according to GB12221-89 standard.

Film Actuator Air Signal Interface

Internal Thread M16 × 1.5

Jacketed Insulation Jacket Heating Body Interface

Butt Welding φ18 × 4

Note: * Body flange and flange end distance can be customized according to user-specified standards, such as: ANSI JIS JPI and other standards.     
 

Allowable Pressure

Area Ae (cm 2)

280

 

400

 

600

 

1000

 

Signal Range Pr (KPa)

20-100

40-200

20-100

40-200

20-100

40-200

20-100

40-200

Air Supply Pressure Ps (MPa)

0.14

0.25

0.14

0.25

0.14

0.25

0.14

0.25

Need to be attached

-

P

-

P

-

P

-

P

Nominal Diameter DN (mm)

And Seat Diameter DN (mm)

25

12

5.57

6.40

      

32

15

  

6.16

6.40

    

40

20

  

5.57

6.40

    

25

  

6.16

6.40

    
   

4.90

6.40

    

50

25

  

6.16

6.40

    

32

  

4.90

6.40

    

40

  

3.90

6.40

    

65

32

    

4.48

6.40

  

80

40

    

3.90

6.40

  

50

    

4.48

6.40

  

65

    

3.63

6.40

  

100

50

    

4.48

6.40

  

65

    

3.63

6.40

  

70

    

2.90

6.40

  

125

65

      

3.85

6.40

150

70

      

2.89

6.40

100

      

3.85

6.40

125

      

3.20

6.40

200

100

      

3.85

6.40

125

      

3.20

6.40

150

      

1.60

4.81

Note: * P: Valve positioner ** Allows differential pressure to constrain the valve body to allow the differential pressure gauge with the same diameter.
 

【 Technical Parameters 】

ZXN type pneumatic two-seat control valve nominal diameter DN (mm)

25

32

40

50

65

80

100

125

150

200

Rated Flow Coefficient

(KV)

Straight Line

12.1

19.4

30.3

48.3

75.9

121

193.6

302.5

484

759

Equal Percentage

11

17.6

27.5

44

69.3

110

176

275

440

693

Rated Stroke L (mm)

16

25

40

60

Diaphragm Effective Area Ae (cm2)

280

400

600

1000

Nominal Pressure PN (MPa)

1.6, 4.0, 6.4

Inherent Flow Characteristics

Straight line, equal percentage

Inherently Adjustable

50

Signal range Pr (KPa)

20 to 100, 40 to 200, 20 to 60, 60 to 100, 80 to 240

Air Supply Pressure Ps (MPa)

0.14 to 0.4

Allowable Leakage (l / h)

Class II (5 × 10 -3 × valve rated capacity) Class IV (10 -3 × valve rated capacity)

Operating Temperature t (℃)

Room Temperature Type

-20 to 200, -40 to 250, and 60 to 250

Heat Tissipation Type

-40 ~ 450, -60 ~ 450

High Temperature Type

450 ~ 650

Low Temperature Type

-60 to -100, -100 to -200 and -200 to -250

Note: The industry performance indicators to implement GB / T4213-92 standard.

 

【Main Parts Material】

Body, Bonnet

50ZG core, Seat

Filler

Bellows

Gasket

Membrane Cover

Corrugated Diaphragm

Spring

Stem, Putter

Bushing

Soft Seal Spool

HT200

1Cr18Ni9Ti, Si Tai Lai alloy welding

Teflon, Flexible Graphite

1Cr18Ni9Ti

Rubber asbestos board, 10 #, 1Cr18Ni9Ti, asbestos spiral wound gasket

A3

Dingqing Rubber Clip Reinforced Polyester Fabric

60SiMn

2Cr13, 1Cr18Ni9Ti

2Cr13

Reinforced Polytetrafluoroethylene