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产品名称:A49H-40 主安全阀
产品分类:安全阀
点击次数333
产品单价:¥0.00
库存数量0
发布日期2012-01-09

SKU:A49H-40 主安全阀
Description:

GA49H-4   DN25

 

说明 Instruction

 

主要用于电站锅炉、压力容器、减温减压装置上使用,防止压力超过允许最高压力值,保证设备安全运行。

This valve is used for power plant boilers, pressure containers, pres-
sure and temperature reducing device and other facilities. It serves to pre- vent  the pressure  exceeding the  highest allowable  pressure value  and ensure the safety of the device when working.

结构简述 Structure briefing

 

1、当介质压力升高到整定压力时,冲量安全阀打开,介质从脉冲管进入主安全阀的活塞室,推动活塞下降,使阀门自动打开,当冲量阀关闭时,阀瓣又自动关闭。        

2、密封面用钴基铬镍不锈钢堆焊而成,阀瓣经热处理,提高了耐磨性和抗冲蚀性。

1.  When the  medium  pressure rises  to the  set pressure,  the  implse
safety valve opens, and the medium in the impulse pipe eners into the pis- ton chamber of the main safety valve from impulse pipe, forcing the piston to descend, and then the valve automatically opens; when the impulse safety valve closes, the disc will also automatically close.
2. The sealed surface is made of Fe base stainless steel by overiaying welding. Through thermal treatment, the wear resistance and anti-erosion of
disc is improved.

1. The main safety valve shall be installed vertically at the highest posi- tion of the deivce.
2. The main safety valve shall be fastened upon the gallow, which sus- tains the back-seat force produced in the steam discharging process of the main safety valve.
3. The exhaust pipe shall contain a special gallow to prevent the force of  its weight  directly applying  on the  main safety  valve. The  connecting lange between the main safety valve and exhaust pipe shall eliminate anyex- tra stress.
4. At the lowest point of the exhaust pipe, water drainage shall be taken  into onsideration  to avoid  producing water  hammer whil  discharging

 

外形尺寸和连接尺寸 Dimensions (mm)

Type

DN Nominal diameter

 Connecting dimensions

L

L1

L2

H

D

D1

D2

b

z-d

DN'

D'

D1'

D2

b'

z'-d'

A49H-4

150

220

230

240

486

300

250

204

30

8-25

200

360

310

278

34

12-25

A49H-4

200

270

295

330

615

375

320

260

38

12-30

300

485

430

390

40

16-30

A49H-4

250

300

350

370

646

445

385

313

42

12-34

350

550

490

450

44

16-34

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