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NKZ41H, NKZ941H vacuum seal structure gate value Applicable medium Water, Steam, Air

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NKZ41H, NKZ941H vacuum seal structure gate value Applicable medium Water, Steam, Air

Country/Region china
City & Province shenzhen guangdong
Categories Shafts

Product Details

NKZ44 NKZ41Y-I NKZ944-I NKZ41H, NKZ941H vacuum seal structure gate value Applicable medium Water, Steam, Air

 

1, the design of the vacuum seal structure packing room, the system is isolated from the atmosphere, with good environmental performance.
 2, selected materials, break all international standards, the overall high quality materials.
 3, sealing pair advanced and reasonable, to improve the sealing performance and long life.
 4, the opening and closing parts are parallel to the gate-way flexible seal, friction is small, open and close easily, easy maintenance, reliable sealing, excellent performance.
 5, stem quenched and the nitrogen treatment, with good corrosion resistance, resistance to abrasion and wear resistance.
 6, flange gaskets made of composite materials, expansion coefficient, airtight performance, ensure

 

Test pressure

PN/MPa
Nominal
pressure

MPa Seal test

Shell strength

Back seal test

Seat test

1.0

1.5

1.1

1.1

1.6

2.4

1.8

1.8

2.5

3.8

2.8

2.8

4.0

6.O

4.4

4.4

6.4

8.6

7.O

7.0

1O.O

15.O

11.O

11.O

 

operating range

Product type

Applicable medium

℃ Applicable temperature

NKZ41H
NKZ44H
NKZ944H-C
NKZ941H


Water, Steam, Air

≤425

NKZ41H(Y)
NKZ44H(Y)-I
NKZ944H(Y)-I
NKZ941H(Y)


Water, Steam, Air

≤550

 

Main spare material

Part name

Body Bonnet

Stem

Wedge gate

Sealing face

Yokenut

Parking

Fastener

NKZ44H
NKZ41H-C
NKZ944H-C
NKZ941H

WCB

2Crl3

25

H:alloy steel

Albronze

Expanding
comDound
graphite

High-grade
carbon steel

NKZ44
NKZ41Y-I
NKZ944-I
NKZ941


Cr.Mo steel

20CrlMo1VA
38CrMoAlA


Cr.Mo steel

 
Y:carbide alloy


Cr.Mo steel

 

Main size and weight

DN/mm
Nominal
diameter 

PN/MPa
Nominal
pressure

Main extemal and connecting dimensions /mm

Valve
weight/kg

Additional flange’s
dimensions/mm

D1 

D2 

z-d 

D0 

Dn 

50

1.O

250

345

160

125

1OO

16

3

4-18

250

28

45

49

58

65

270

395

180

145

120

18

3

4-18

250

40

48

64

75

80

280

425

195

160

135

20

3

4-18

300

55

50

78

97

100

300

51O

215

180

155

20

3

8-18

300

72

52

96

110

125

325

570

245

21O

185

22

3

8-18

350

106

60

120

136

150

350

725

280

240

21O

24

3

8-18

350

146

60

145

163

200

400

820

335

295

265

26

3

8-18

400

220

62

202

223

250 

450 

890 

390 

350 

320 

28 

12-23 

400 

315 

62 

225 

278 

300

500

1070

440

400

368

28

3

12-23

450

398

65

303

330

350

550

1320

500

460

428

30

4

16-23

550

530

65

351

382

400

600

1450

565

515

482

32

4

16-25

550

690

65

398

432

450

650

1560

615

565

532

32

4

20-25

600

870

70

460

485

500

700

1720

670

620

585

34

4

20-25

650

1080

78

500

535

600

800

1880

780

725

685

36

5

20-30

700

1350

90

600

636

700

900

2085

895

840

800

40

5

24-30

750

1950

90

690

726

800

1OOO

2590

101O

950

905

44

5

24-34

800

2500

106

790

826

50

1.6

250

345

160

125

1OO

16

3

4-18

250

28

48

49

58

65

270

395

180

145

120

18

3

4-18

250

40

50

64

75

80

280

425

195

160

135

20

3

8-18

300

58

52

78

91

100

300

51O

215

180

155

20

3

8-18

300

75

52

96

110

125

325

570

245

21O

185

22

3

8-18

350

110

60

120

136

150

350

725

280

240

21O

24

3

8-23

350

150

60

145

163

200

400

820

335

295

265

26

3

12-23

400

223

62

201

223

250 

450 

890 

405 

355 

320 

30 

12-25 

450 

326 

68 

253 

278 

300

500

1070

460

41O

375

30

3

12-25

550

432

70

303

330

350

550

1320

520

470

435

34

4

16-25

600

572

78

351

382

400

600

1450

580

525

485

36

4

16-30

650

740

90

398

432

450

650

1560

640

585

545

40

4

20-30

700

955

95

450

485

500

700

1720

705

650

608

44

4

20-34

750

1195

98

500

535

600

800

1880

840

770

718

48

5

20-41

800

1455

105

600

636

700

900

2085

g1O

840

788

50

5

24-41

850

211O

11O

690

726

800

1OOO

2590

1020

950

898

52

5

24-41

950

2630

115

790

826

 

Main size and weight

DN/mm
Nominal
diameter

PN/MPa
Nominal
pressure

Mainexternalandconnectingdimensions /mm

Valve
weight/kg

Additional flange’s dimensions/mm

D1 

D2 

Z-d 

DO 

Dn

50

25

250

345

160

125

100

20

3

4-18

250

30

48

49

64

65

270

395

180

145

120

22

3

8-18

250

43

52

66

82

80

280

425

195

160

135

22

3

8-18

300

60

55

78

95

1OO

300

510

230

190

160

24

3

8-23

300

79

62

100

117

125

325

570

270

220

188

28

3

8-25

350

114

68

125

144

150

350

725

300

250

218

30

3

8-25

350

157

72

151

172

200

400

820

360

310

278

34

3

12-25

400

243

60

201

223

250 

450 

890 

425 

370 

332 

36 

12-30 

450 

345 

85 

253 

278 

300

500

1070

483

430

390

40

4

16-30

550

455

92

303

330

350

550

1320

550

4g0

448

44

4

16-34

650

615

98

351

382

400

 

1450

610

550

505

48

4

16-34

700

7g4

115

398

432

450

650

1560

660

600

555

50

4

20-34

750

1018

115

450

483

500

700

1720

730

660

61O

52

4

20-41

800

1250

120

498

535

600

800

1880

840

770

718

56

5

20-41

850

1528

130

598

636

700

900

2085

955

875

815

60

5

24-48

900

2265

140

688

726

800

1000

2590

1070

990

930

64

5

24-48

1000

2847

150

788

826

 

DN/mm
Nominal
di8m8ter

PN/MPa
Nominal
pressure

Main external and connecting dimensions 

Valve
weight/kg

Additional flange’s dimensions/mm

D1 

D2 

D6 

f2 

z-d 

h

DO

Dn

50

4.O

250

345

160

125

100

20

3

88

4

4-18

300

35

48

48

64

65

270

395

180

145

120

22

3

11O

4

8-18

300

49

52

66

82

80

280

425

195

160

135

22

3

121

4

8-18

350

65

58

78

95

100

300

510

230

190

160

24

3

150

4.5

8-23

350

87

68

100

117

125

325

570

270

220

188

28

3

176

4.5

8-25

400

124

68

125

144

150

350

725

300

250

218

30

3

204

4.5

8-25

400

172

72

151

172

200

400

820

375

320

282

38

3

260

4.5

12-30

450

275

88

19g

223

250

450

890

445

385

345

42

3

313

4.5

12-34

550

392

102

251

278

300

500

1070

51O

450

408

46

4

364

4.5

16-34

650

515

116

301

330

350

550

1320

570

510

465

52

4

422

5

16-34

750

684

120

34g

382

400

600

1450

655

585

535

58

4

474

5

16-41

850

902

142

396

432

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