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High temperature and high pressure butt welding bevel gear gate valve

High temperature and high pressure butt welding bevel gear gate valve

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Gate Valve
Describe
Stainless steel gate valve: stainless steel material for valve body, valve cover, gate and brake rod. The sealing surface of the valve seat is PTFE, stainless steel + hard alloy or hardfacing alloy. The filler is generally made of hard alloy and polytetrafluoroethylene. Ethylene, asbestos graphite or flexible graphite. Nominal size DN15~DN800, working pressure 1.6MPa~20.0MPa, applicable temperature ≤200°C, suitable for nitric acid and weak corrosive medium pipelines.
 
Product Usage
 
Stainless steel gate valve: stainless steel material for valve body, valve cover, gate and brake rod. The sealing surface of the valve seat is PTFE, stainless steel + hard alloy or hardfacing alloy. The filler is generally made of hard alloy and polytetrafluoroethylene. Ethylene, asbestos graphite or flexible graphite. Nominal size DN15~DN800, working pressure 1.6MPa~20.0MPa, applicable temperature ≤200°C, suitable for nitric acid and weak corrosive medium pipelines.
 
Features
 
1. Austenitic stainless steel is used, which has good corrosion resistance to oxidizing acid medium.
 
2. When the medium flows through the stainless steel gate valve, its flow direction is not changed, and the fluid resistance is small.
 
3. The direction of movement of the ram is perpendicular to the direction of flow of the medium, the opening and closing torque is small, and the opening and closing is less labor-saving.
 
4, the flow direction of the medium is not limited, no disturbance, no pressure reduction, the medium can flow from any direction on both sides of the gate valve, can achieve the purpose of use, and is most suitable for the pipeline where the flow direction of the medium may change.
 
5. The gate is placed vertically in the valve body, and the structure length is short.
 
6, good sealing performance. The sealing surface is less eroded when fully open.
 
Executive standard
 
Design specification: GB/T 12234
 
Structure length: GB/T 12221
 
Connection flange: JB/T 79
 
Test and inspection: JB/T 9092
 
Pressure-temperature: GB/T 9131
 
Product identification: GB/T 12220
 
Performance parameter
 

Nominal pressure PN(MPa)

case

test pressure(MPa)

Upper seal

Seal (liquid)

Sealed (gas)

1.6

2.4

1.8

0.6

1.8

2.5

3.8

2.8

0.6

2.8

4.0

6.0

4.4

0.6

4.4

6.4

9.6

7.0

0.6

7.0

10.0

15.0

11.0

0.6

11.0

16.0

24.0

18.0

0.6

18.0

 

Applicable medium and applicable temperature

Housing material

Applicable medium

Applicable temperature (°C)

Chrome nickel titanium steel (P type)

Nitric acid

≤200

Chrome nickel molybdenum titanium steel (R type)

Acetic acid

≤200

 

Main part material

Valve body, bonnet

Valve plate, valve seat

Valve stem

Stem nut

filler

Hand wheel

Chrome nickel titanium steel

Stainless steel, stainless steel + hard alloy

Chrome nickel titanium stainless steel

Aluminum bronze

PTFE

Malleable cast iron

Chrome nickel molybdenum titanium steel

Stainless steel, stainless steel + hard alloy

Chrome nickel titanium stainless steel

Aluminum bronze

PTFE

Malleable cast iron

Main shape and connection size

Nominal diameter

Main dimensions and connection dimensions

L

D

D1

D2

b

Z-d

H

D0

Z41W-16P

15

130

95

65

45

14-2

4-Φ14

170

120

20

150

105

75

55

14-2

4-Φ14

190

140

25

160

115

85

65

14-2

4-Φ14

205

160

32

180

135

100

78

16-2

4-Φ18

270

180

40

200

145

110

85

16-3

4-Φ18

310

200

50

250

160

125

100

16-3

4-Φ18

358

240

65

265

180

145

120

18-3

4-Φ18

373

240

80

280

195

160

135

20-3

8-Φ18

435

280

100

300

215

180

155

20-3

8-Φ18

500

300

125

325

245

210

185

22-3

8-Φ18

614

320

150

350

280

240

210

24-3

8-Φ23

674

360

200

400

335

295

265

26-3

12-Φ23

811

400

250

450

405

355

320

30-3

12-Φ25

969

450

300

500

460

410

375

30-3

12-Φ25

1145

580

350

550

520

470

435

34-4

16-Φ25

1280

640

400

600

580

525

485

36-4

16-Φ30

1452

640

Z41W-25P

15

130

95

65

45

16-2

4-Φ14

170

120

20

150

105

75

55

16-2

4-Φ14

190

140

25

160

115

85

65

16-2

4-Φ14

205

160

32

180

135

100

78

18-2

4-Φ18

270

180

40

200

145

110

85

18-3

4-Φ18

310

200

50

250

160

125

100

20-3

4-Φ18

358

240

65

265

180

145

120

22-3

8-Φ18

373

240

80

280

195

160

135

22-3

8-Φ18

435

280

100

300

230

190

160

24-3

8-Φ23

500

300

125

325

270

220

188

28-3

8-Φ25

614

320

150

350

300

250

218

30-3

8-Φ25

674

360

200

400

360

310

278

34-3

12-Φ25

811

400

250

450

425

370

332

36-3

12-Φ30

969

450

300

500

485

430

390

40-4

16-Φ30

1145

580

350

550

550

490

448

44-4

16-Φ34

1280

640

400

600

610

550

505

48-4

16-Φ34

1452

640