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Pneumatic gate valve

Pneumatic gate valve

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Gate Valve
Describe
First, the product overview
 
Pneumatic Flange Gate Valves are low-profile, open-rod pneumatic gate valves with a pneumatic actuator (double-cylinder with buffer mechanism) and manual and protective mechanisms (manual and self-locking pneumatic-manual conversion). Due to the double-layer cylinder structure, the valve has doubled the lifting force compared to the single-cylinder pneumatic gate valve. This fundamentally solves the disadvantage that some valve cylinders of single-cylinder pneumatic gate valves are wedged and cannot be opened. Moreover, since the pneumatic gate valve has a buffer mechanism, it can effectively decelerate and lighten the stainless steel pneumatic valve, the wear of the valve plate sealing surface and the valve body sealing surface caused by the downward impact of the piston, and at the same time, the gate can be prevented from being stuck. The phenomenon.
 
The actuator of the pneumatic gate valve has two functions of positive and negative, so the opening and closing modes of the valve have two modes of action: gas opening and gas closing. The pneumatic gate valve adopts the unique structure of metal contact, reliable operation, and has extremely high cutting performance, which is superior to the conventional shut-off valve. Pneumatic gate valves have excellent cutting performance and are widely used in the industrial field. Pneumatic gate valves are reliable in performance, easy to operate and easy to maintain. They are widely used in petroleum, chemical, marine and other sectors for the control of various media.
 
Second, product features
 
1. Pneumatic gate valve is equipped with pneumatic actuator and manual mechanism.
 
2. The gate valve actuator adopts a double-layer cylinder structure, which doubles the lifting force compared with the single-cylinder pneumatic gate valve.
 
3. Solved the disadvantage that some valve plates of single-cylinder pneumatic gate valves are wedged in the valve body and cannot be opened.
 
4, with a buffer mechanism, can effectively reduce the wear of the valve plate sealing surface and the valve body sealing surface caused by the downward impact of the piston when the valve is closed, and can also avoid the phenomenon of the gate jam.
 
5, the sealing performance is very good, allowing the leakage to reach 10-8 × KV.
 
6, a wide range of use, the temperature can be -196 ° C - 600 ° C, caliber 40mm - 600mm. The valve seat has three parallel, 60°V-shaped incisions and 90°V-shaped incisions to meet the needs of different applications.
 
7. The pneumatic gate valve body can be insulated by the jacket type, which is used for the occasion of blockage, condensation or coking after the medium is cooled.
 
 
Third, the main technical parameters
 

Nominal diameter (mm)

40

50

80

100

125

150

200

250

300

350

400

450

500

600

Rated KV value

170

270

510

940

1400

2200

3500

8500

9600

13000

17000

25000

27000

38000

Nominal pressure

PN1.6Mpa、PN4.0Mpa、PN6.4Mpa

Piston diameter (mm)

120

160

280

360

420

540

Operating pressure

0.3Mpa-P0.5Mpa

Medium temperature

Standard: -20°C-250°C High temperature: 250°C-500°C Low temperature: -196°C--20°C

Allowable leakage

10-8×KV

Flow characteristics

Approximate straight line

Mode of action

Continue, continuous (with valve positioner)

 
Fourth, structural characteristics
 
The general gate valves used in the market have been leaking or rusting for a long time. The company has introduced the elastic seat sealing gate valve produced by European high-tech rubber and valve manufacturing technology, which overcomes the defects of general gate valve sealing, rust and other elastic seats. The sealing valve uses the elastic ram to produce a slight elastic deformation compensation effect to achieve a good sealing effect. The valve has the advantages of light switch, reliable sealing, good elastic memory and long service life. Can be widely used in tap water, sewage, construction, petroleum, chemical, food, pharmaceutical, textile, electric power, shipbuilding, metallurgy, energy systems and other body pipelines as a regulating and intercepting device.
 
Five, performance parameters
 

Applicable medium

Applicable temperature (°C)

material

Valve body, bonnet

Seat, gate and seal

Valve stem

filler

cylinder

Water, steam, oil, etc.

≤350

Carbon steel

Surfacing iron-based alloy

Chrome stainless steel

Flexible graphite

Seamless steel pipe

 

DN

PN

L

H

h

A

C

40

PN16

250

675

255

120

200

PN64

50

PN16

250

685

255

120

200

PN64

80

PN16

280

800

340

120

200

PN64

310

160

240

100

PN16

300

850

370

120

200

PN64

350

160

240

125

PN16

325

1020

415

120

200

PN64

400

160

240

150

PN16

350

1085

455

160

240

PN64

450

280

360

200

PN16

400

1195

515

160

240

PN64

500

280

360

250

PN16

450

1460

580

160

240

PN64

550

280

360

300

PN16

500

1575

645

280

360

PN64

600

360

350

PN16

550

1890

810

280

360

PN64

650

360

440

400

PN16

600

2070

900

360

440

PN64

700

420

500

450

PN16

650

2350

975

360

440

PN64

750

420

500

500

PN16

700

2500

1073

360

440

PN64

800

540

620

600

PN16

750

2930

1302

360

440

PN64

850

540

620