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Company:Wenzhou Topnotch Machine Co.,Ltd. 
Address:Dongyang Rd., Heyi Industrial Zone,Oubei Town, Yongjia County,Wenzhou,Zhejiang, China 325105
Contact Person: Mr. Kevin Tung
Tel: +86-577-67318591 67318935
Email: market@tanamachine.com
MB: 86-18906638592

Spring-Loaded steam Safety Relief Valve

Spring-loaded Steam Safety relief Valve is used in power plant boilers,pressure containers and temperature reducing devices and other facilities.It serves to prevent pressure from exceeding max. allowed value and ensure the safety of the device during working.Steam Safety Valve sizing and selection acc.to API 520(ASME secⅧ),designed acc.to API 526,test acc.to API 527(ASME PTC 25),flange acc.to ASME B16.5. This valve’s type include A48C Open Bonnet Plain Lever Safety Valve,A48Y High Temperature and High Pressure With Radiator Safety Valve,High Performance Steam Safety Valve which meets the requirement of ASME secⅠ,High Temperature High Pressure Welded Safety Valve.

The spring safety valve with a lever can be opened manually by the lever when the media pressure over 75% of setting pressure(On the premise of ensuring safety)Steam Safety relief Valve.jpg

The opening height of the falll lift safety valve is one forth of the flow-through diameter,having an advantage of discharging greatly.The opening height of the low-lift safety valve is between one twentieth and one fortieth of the flow-through diameter.

spring loaded safety relief valve specification

spring loaded safety relief valve with radiator material


Type A48Y - Safety relief Valve for steam with lever operated                                 

  Features                    

Safety Valves/pressure safety valves, angle type

Full lift safety valve for high temperture and high pressure condition 

metal to metal seated, with plain type lever, 
Inlet: Flanged connection acc. to ANSI B16.5
Outlet: Flanged connection acc. to ANSI B16.5
Open bonnet, with radiator

 

Applications

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

Approved for gases, vapours and fluids in high temperature and high pressure condition.

 Woking Tempreture:Lower than 300°C


Standards Compliance

Design and Manufacture: API RP 520
Face to Face(end to end): API 526

Test and Inspection: API 527



Main property specification

Mormal PressurePN150300600
Body strengthPs(Mpa)3.07.515
Set pressurePk(Mpa)0.1-21.6-53.2-10
Seal pressurePm(Mpa)90%Pk
Reseation pressurePh(Mpa)≥90%Pk
Relieving PressurePp(Mpa)≤1.03Pk
Lift heightH(mm)≥1/4 d0
Appropriate temp.
≤350℃
Appropriate MediumSteam

  Code of throat diameter

Code

Diameter

Code

Diameter

D

10

L

50

E

13

M

55

F

16

N

60

G

20.5

P

72

H

26

Q

96

J

33

R

115

K

40

T

148

Main Materials list

No

Name of part

Materials 

1

Body

WCB

CF8

CF8M

2

Nozzle

2Cr13/ 304

CF8

CF8M

3

Adjusting Ring

2Cr13/ 304

304

316

4

Disc

2Cr13/ 304

304

316

5

Guide sleeve

2Cr13/ 304

304

316

6

Bonnet

WCB

CF8

CF8M

7

Spring

50CrVA

50CrVA coated teflon

50CrVA coated teflon

8

Stem

2Cr13

304

316

9

Adjusting bolt

45

2Cr13

2Cr13

10

Cap

ZG200-400

ZG200-400

ZG200-400

Sealing surface of material "H" depositing D507,  "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

Main Dimensions (Inlet flange 150lb)

A48Y spring loaded safety relief valve for steam

Nominal Diameter(in)

Dimensions(mm) Inlet flange 150lb

D0

D

D1

D2

b

t

Z-Ød

DN

D’

D1’

D2’

B’

T’

Z-Ød’

L

L1

H

1/2" x 3/4"

D

89

60.5

35

12

5

4-15

20

98

70

43

14

1.6

4-15

90

90

290

3/4" x 1"

D

98

70

43

14

5

4-15

25

108

79.5

51

15

1.6

4-15

96

92

310

1" x 11/2"

D

108

79.5

51

15

5

4-15

40

127

98.5

73

18

1.6

4-15

115

105

320

1" x 2"

D

108

79.5

51

15

5

4-15

50

152

120.5

92

18

1.6

4-19

115

105

320

11/2" x 2"

G

127

98.5

73

18

5

4-15

50

152

120.5

92

18

1.6

4-19

121

124

350

11/2" x 21/2"

G

127

98.5

73

18

5

4-15

65

178

139.5

105

20

1.6

4-19

121

124

360

11/2" x3"

G

127

98.5

73

18

5

4-15

80

190

152.5

127

22

1.6

4-19

124

130

360

2" x21/2"

H

152

120.5

92

18

5

4-19

65

178

139.5

105

20

1.6

4-19

124

130

380

2" x 3"

J

152

120.5

92

18

5

4-19

80

190

152.5

127

22

1.6

4-19

124

130

380

21/2" x 4"

J

178

139.5

105

20

5

4-19

100

229

190.5

157

24

1.6

8-19

143

137

380

3" x 4"

L

190

152.5

127

22

5

4-19

100

229

190.5

157

24

1.6

8-19

162

156

480

4" x 6"

N

229

190.5

157

24

10

8-19

150

279

241.5

216

26

1.6

8-22

210

197

540

6" x 8"

P

279

241.5

216

26

10

8-22

200

343

298.5

270

29

1.6

8-22

241

240

760

8" x10"

R

343

298.5

270

29

10

8-22

250

406

362

324

31

1.6

12-25

279

276

830

12" x14"

T

483

432

381

32

10

12-25

350

533

476

413

35

1.6

12-29

370

360

890

Remark:150lb for outlet flange.

Main Dimensions (Inlet flange 300lb)

A48Y steam Spring loaded safety relief valve with lever operated

Nominal Diameter(in)

Dimensions(mm) Inlet flange 300lb

D0

D

D1

D2

b

t

Z-Ød

DN

D’

D1’

D2’

B’

T’

Z-Ød’

L

L1

H

1/2" x 3/4"

D

95

66.5

35

15

5

4-15

20

98

70

43

14

1.6

4-15

90

90

290

3/4" x 1"

D

117

82.5

43

16

5

4-19

25

108

79.5

51

15

1.6

4-15

96

92

310

1" x 11/2"

D

124

89

51

18

5

4-19

40

127

98.5

73

18

1.6

4-15

115

105

320

1" x 2"

D

124

89

51

18

5

4-19

50

152

120.5

92

18

1.6

4-19

115

105

320

11/2" x 2"

F

156

114.5

73

20

5

4-22

50

152

120.5

92

18

1.6

4-19

121

124

350

11/2" x 21/2"

F

156

114.5

73

20

5

4-22

65

178

139.5

105

20

1.6

4-19

121

124

360

11/2" x3"

F

156

114.5

73

20

5

4-22

80

190

152.5

127

22

1.6

4-19

124

130

360

2" x21/2"

H

165

127

92

22

5

8-19

65

178

139.5

105

20

1.6

4-19

124

130

380

2" x 3"

H

165

127

92

22

5

8-19

80

190

152.5

127

22

1.6

4-19

124

130

380

21/2" x 4"

J

190

149

105

24

5

8-22

100

229

190.5

157

24

1.6

8-19

143

137

380

3" x 4"

L

210

168.5

127

28

5

8-22

100

229

190.5

157

24

1.6

8-19

162

156

480

4" x 6"

N

254

200

157

32

10

8-22

150

279

241.5

216

26

1.6

8-22

210

197

540

6" x 8"

P

318

270

216

38

10

12-22

200

343

298.5

270

29

1.6

8-22

241

240

760

8" x10"

R

381

330

270

42

10

12-25

250

406

362

324

31

1.6

12-25

279

276

830

Remark:150lb for outlet flange.

In order to offer a better solution for your meet.We need follow information:

1.Design standard.

2.Connection standard .

3. Size.

4.Set Pressure,Working Pressure .

5.Body material . Trim (Material for inside parts).

6.Connection type.

7.Operation type. ( Without lever or not )

8.Medium.

9.Temperature. Ambient temperature range . Corrosion considerations.

For more details, please download catalogue for reference or contact with us.

A48Y-150C 2×3.pdf

If you have any enquiry about quotation or cooperation,please feel free to email us at market@tanamachine.com or use the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.

Assistance

For urgent matters,TANA after sales service is active 24 hours a day

Contact Us

​Company:Wenzhou Topnotch Machine Co.,Ltd. 

Address:Dongyang Rd., Heyi Industrial Zone,Oubei Town, Yongjia County,Wenzhou,Zhejiang, China 325105

Contact Person:
  Mr. Kevin Tung 

Tel: +86-577-67318591 67318935

Email: market@tanamachine.com

 

MB: 86-18906638592

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