���Q����
PN/MPa
Nominal
pressure

ԇ򞉺��/MPa Seal test

���w����ԇ�
Shell strength

���ܷ�ԇ�
Back seal test

�ܷ�ԇ�
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

�a(ch��n)Ʒ���
Product type

�m�ý��|(zh��)
Applicable medium

�m�Üض�/��
Applicable temperature

NKZ41H
NKZ44H
NKZ944H-C��
NKZ941H

ˮ,���������՚�
Water,��Steam,��Air

≤425

NKZ41H��Y��
NKZ44H��Y��-I��
NKZ944H��Y��-I��
NKZ941H��Y��

ˮ,������,���՚�
Water,��Steam��Air

≤550

������Q
Part name

�y�w,���y�w
Body Bonnet

�y�U
Stem

�l��
Wedge gate

�ܷ���
Sealing face

�y�U��ĸ
Yokenut

����
Parking

�o�̼�
Fastener

NKZ44H
NKZ41H-C��
NKZ944H-C��
NKZ941H

WCB

2Crl3

25

H���Ͻ��
H��alloy steel

�X���~
Albronze

��Û�ͺ�ʯī
Expanding
comDound
graphite

��(y��u)�|(zh��)̼�
High-grade
carbon steel

NKZ44
NKZ41Y-I��
NKZ944-I��
NKZ941

�t�f�
Cr.Mo steel

20CrlMo1VA
38CrMoAlA

�t�f�
Cr.Mo steel

Y��Ӳ�|(zh��)�Ͻ�
Y��carbide alloy

�t�f�
Cr.Mo steel

���Qͨ��
DN/mm
Nominal
diameter

���Q����
PN/MPa
Nominal
pressure

��Ҫ���γߴ���B�ӳߴ�/mm
Main extemal ��nd connecting dimensions

�y�T
����
/kg
Valve
weight

�����m�ߴ�/mm
Additional flange��s
dimensions

L

H

D

D1

D2

b

f

z-d

W

h

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

3

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

3

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