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Type A28H Full Lift Plain Lever Safety Valve

full lift safety valveStandard safety valve for fluidsmetal to metal seatedwith plain lift devicethreaded end

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Type A28 Safety Valve


safety valve/pressure relief valve, angle type

full lift safety valve

Standard safety valve for fluids

metal to metal seated

with plain lift device

threaded end


Applications

Provided as safety device for protection against excessive pressure in pressure vessels.

Approved for gases, vapours and fluids.

Working temperatures: ≤ 300℃


Standards Compliance

Design and Manufacture: GB/T 12241-2005, GB/T 12243-2005

Face to Face(end to end): JB/T 2203-1999

Test and Inspection: GB/T 12243-2005



Material for main parts  

NO

Name of part

A28H-C/A28F,KA28Y-C Material

A28W-P/A28F-P /KA28Y-P Material

A28Y-R Materials

1

Body

HT350

304

316

2

Nozzle

35

304

316

3

Adjust ring

2Cr13

304

316

4

Disc

2Cr13

304

316

5

Spring

50CrVA

50CrVA coated teflon

50CrVA coated teflon

6

Stem

2Cr13

2Cr13

304

7

Adjusting bolt

45

2Cr13

304

8

Cap

ZG200-400

ZG200-400

304

Sealing surface of material "H" depositing D507, "W" same as body, "Y" depositing stellite



Essential:
Valves are delivered at a set pressure, therefore when ordering 
please confirm set pressure, medium and temperature


TS

Safety accessory and Safety protection device 
Manufacture License of Special Equipment, People's republic of China

 

Dimensions(mm)  

DN

do

Rc

L

L1

G

H

15

10

1/2"

37

65

3/4"

196

20

12

3/4"

40

70

1"

215

25

15

1"

45

78

1 1/4"

234

32

20

1 1/4"

55

90

1 1/2"

302

40

25

1 1/2"

67

105

2"

326

50

32

2"

76

115

2 1/2"

348

65

40

2 1/2"

110

145

3"

370

80

50

3"

110

145

4"

410

Remark: NPT, R, G thread are accepted







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