A21F-16C  A21H-16C  A21H-40  A21H-64  A21Y-100  A21H-160  A21W-16P  A21W-40P  A21F-40P  A21W-64P A21W-100P  A21W-160P  KA21Y-16C  KA21Y-16P  A21Y-16R  A21Y-40R  A21Y-64R  A21Y-100R  A21Y-160R

A21F、A21H-C型适用于工作温度≤200℃的空气、氨、石油气……等介质的设备或管路上。A21W-P、R型适用于温度≤200℃有腐蚀性的气体或液体的设备或管路上，作为超压保护装置。KA21Y型适用于温度≤100℃的液化石油气等。

A21F, A21H-C type are used for the equipment and pipeline of the air,  ammonia, petroleum gas, etc. medium what the wor-king temperature are less than 200 . A21W-P, R type are used for the equipment and pipeline of the quality with corr ode gas and liquid medium shat the wor-king temperature are less than 200 . Take for extrapressure protection devices. KA21Y type are used for liquefied petroleum gas what the working temperature are less  than 100

主要零部件材料 Explanation of materials for main parts

NO.

Name of part

A21H-C/A21F  KA21Y-C Materials

A21W-P/A21F-P  KA21Y-P Materials

A21Y-R    Materials

1

   Union

20

1Cr18Ni9Ti

1Cr18Ni12Mo2Ti

2

 Union nut

35

2Cr13

1Cr18Ni9Ti

3

  Nozzle

35

1Cr18Ni9Ti

1Cr18Ni12Mo2Ti

4

  Body

2Cr13

1Cr18Ni9Ti

1Cr18Ni12Mo2Ti

5

  Disc

2Cr13/2Cr13+PTFE

1Cr18Ni9Ti/1Cr18nI9Ti+PTFE

1Cr18Ni12Mo2Ti

6

   Spring washer

2Cr13

1Cr18Ni9Ti

1Cr18Ni12Mo2Ti

7

  Spring

50CrVA

50CrVA Coated Teflon

50CrVA Coated Teflon

8

 Locking nut

Q235-A

2Cr13

1Cr18Ni9Ti

9

 Spring guide

2Cr13

1Cr18Ni9Ti

1Cr18Ni12Mo2Ti

10

 Adjusting nut

Q235-A

2Cr13

1Cr18Ni12Mo2Ti

 Sealing surface of material

"Y" Co Depositing stellite, "H" D507 Depositing D507, "W" body

外形尺寸和连接尺寸 Dimensions（mm）

Type

（DN）
Nominal diameter

do

d

Do

M

d1

D1

L

L1

H

KA21Y-16C A21H-16C A21H-40
A21W-16P A21W-40P KA21Y-16P

15

12

15

20

M27    1.5

G1/2"

30

35

76

66

20

16

20

25

M33    1.5

G3/4"

34

40

87

68

25

18

25

31

M39    1.5

G1"

40

50

100

105

A21Y-64
A21Y-64P A21Y-100
A21Y-100P

15

10

15

25

M39    1.5

G1"

44

50

100

66

20

10

20

31

M39    1.5

G1"

44

50

100

68

25

12

25

31

M39    1.5

G1"

44

50

100

105

A21W-160
/160P

15

8

20

/

M24    2

G1"

44

50

100

261

20

8

25

/

M33    2

G1"

44

50

100

261

25

8

28

/

M36    2

G1"

44

50

100

285