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| 产品： |
浏览次数：179A49H-40 主安全阀 |
| 品牌： |
上海众野 |
| 产品型号： |
A49H-16C |
| 产品规格： |
DN50 |
| 最小起订量： |
1 台 |
| 供货总量： |
20 台 |
| 发货期限： |
自买家付款之日起 3 天内发货 |
| 有效期至： |
长期有效 |
| 最后更新： |
2016-09-08 08:27 |
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| SKU:A49H-40 主安全阀 |
Description:
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GA49H-4 DN25
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说明 Instruction
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主要用于电站锅炉、压力容器、减温减压装置上使用，防止压力超过允许压力值，保证设备安全运行。
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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.
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结构简述 Structure briefing
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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。
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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。
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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.
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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
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外形尺寸和连接尺寸 Dimensions (mm)
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Type
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DN Nominal diameter
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Connecting dimensions
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L
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L1
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L2
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H
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D
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D1
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D2
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b
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z-d
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DN'
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D'
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D1'
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D2
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b'
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z'-d'
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A49H-4
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150
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220
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230
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240
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486
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300
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250
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204
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30
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8-25
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200
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360
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310
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278
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34
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12-25
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A49H-4
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200
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270
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295
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330
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615
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375
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320
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260
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38
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12-30
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300
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485
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430
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390
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40
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16-30
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A49H-4
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250
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300
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350
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370
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646
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445
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385
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313
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42
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12-34
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350
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550
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490
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450
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44
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16-34
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