A47 Flanged Low Lift Spring Loaded Steam Safety Valve with Lever

Valve Type: Safety Valve
End: Flanged
Body: ASTM A216 WCB
Trim: 2CR13
Spring:65CrMo
Pressure: PN16-PN64
Set pressure as per customer
With Lever Design

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Brief Introduction of HRSO Safety Valve 

        Safety valve is a safety device to prevent bursting of pressure equipment and containers or easily caused by pressure rise or pressure inside the container exceeding the limit. Safety valve is a safety device widely used in pressure systems such as pressure vessels, boilers, and pressure pipelines to ensure the safe operation of pressure systems. When the pressure of the container exceeds the design specification, the safety valve is automatically opened, and the exhaust gas reduces the excessive pressure in the device to prevent the damage of the container or pipeline. And when the pressure in the vessel drops to normal operating pressure, it automatically shuts down to avoid all the gas being exhausted due to the overpressure of the vessel, resulting in waste and production interruption. 


        The safety valve is mainly composed of three parts: valve seat, valve disc (valve core) and loading mechanism. Some valve seats are integral with the valve body, and some are assembled with the valve body, which communicates with the equipment. The valve disc is often associated with a valve stem, which is tightly fastened to the valve seat. Above the disc is a loading mechanism, and the size of the load can be adjusted. 


          When the pressure in the equipment is within a certain working pressure range, the force of the internal medium acting on the valve disc is less than the force applied by the loading mechanism on the valve, and the difference between the two constitutes the sealing force between the valve disc and the valve seat. The valve disc is pressed tightly against the valve seat, and the medium of the equipment cannot be discharged. When the pressure in the equipment exceeds the specified working pressure and reaches the opening pressure of the safety valve, the force of the internal medium acting on the disc is greater than the force exerted by the loading mechanism on it, so the disc leaves the valve seat, the safety valve opens, and the equipment The medium inside is discharged through the valve seat. 


             If the discharge volume of the safety valve is greater than the safe discharge volume of the equipment, the pressure in the equipment will gradually decrease, and after a short period of exhaust, the pressure will return to the normal working pressure. At this time, the force of the internal pressure acting on the valve disc is smaller than the force exerted by the loading mechanism on it, the valve disc presses the valve seat tightly, the medium stops discharging, and the equipment continues to operate under normal working pressure. 


              Therefore, the safety valve is closed or opened by itself to prevent the overpressure of the equipment through the fluctuation of the medium force on the valve disc and the force of the loading mechanism.


 A47 Flanged Low Lift  Spring Loaded Steam Safety Valve with Lever

              A47type HRSO Spring low lift steam safety valve is suitable for equipment or pipelines with working temperature ≤ 350 ℃, such as steam, air and other media. As an overpressure protection device. The connecting flange standard is series 1 of JB/T-94. The spring slightly open closed safety valve is different from the general full open safety valve. It can be closed automatically after the pressure is released, and no manual reset is required.


Main Parts Materials List 

NO

Part Name 

Materials 

1

Body 

WCB

2

Seat

ZG2Cr13

3

Adjustable Gasket

ZG2Cr13

4

Disc 

2Cr13

5

Guide Sleeve 

2Cr13

6

Bonnet

ZG230-450

7

Spring 

50CrVA

8

Stem 

2Cr13

9

Lever 

ZG200-400

10

Adjustable Bolt 

45

11

Protection Cover 

ZG200-400


Sealing Materials 

Overlay 


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HRSO

Model

Name

DN

do

D

K

g

g1

b

f

f1

Z-ød

DN'

D1

K1

g2

g'

b1

f'

f1'

Z1-ød1

L

L1

H

A47H-16C

20

15

105

75


55

16

2


4-14

20

105

75

55


16

2


4-14

100

85

270

25

20

115

85


65

16

2


4-14

25

115

85

65


16

2


4-14

100

85

270

32

25

140

100


78

18

2


4-18

32

140

100

78


18

2


4-18

115

100

312

40

32

150

110


85

18

3


4-18

40

150

110

85


18

3


4-18

120

110

320

50

40

165

125


100

20

3


4-18

50

165

125

100


20

3


4-18

135

120

390

65

50

185

145


120

20

3


4-18

65

185

145

120


20

3


4-18

140

130

395

80

65

200

160


135

20

3


8-18

80

200

160

135


20

3


8-18

160

135

400

100

80

220

180


155

22

3


8-18

100

220

180

155


22

3


8-18

170

160

600

125

100

250

210


185

22

3


8-18

125

250

210

185


22

3


8-18

190

190

620

150

125

285

240


210

24

3


8-23

150

285

240

210


24

3


8-23

205

195

625

200

150

340

295


265

26

3


12-23

200

340

295

265


26

3


12-23

240

230

798

250

200

405

355


320

30

3


12-26

250

405

355

320


30

3


12-26

350

320

981

300

250

460

410


375

30

4


12-26

300

460

410

375


30

4


12-26

350

320

1005


For more information, please send email to sales@hrsovalve.com

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