1、蒸汽锅炉安全阀,一般选用敞开全启式弹簧安全阀。

2、液体介质用安全阀,一般选用微启式弹簧安全阀。

3、空气或其他气体介质用安全阀,一般选用封闭全启式弹簧安全阀

4、液化石油气汽车槽车或液化石油气铁路罐车用安全阀,一般选用全启式内装安全阀。

5、采油井出口用安全阀,一般选用先导式安全阀。

6、蒸汽发电设备的高压旁路安全阀,一般选用具有安全和控制双重功能的先导式安全阀。

7、若要求对安全阀做定期开启试验时,应选用带提升扳手的安全阀。当介质压力达到开启压力的75%以上时,可利用提升扳手将阀瓣从阀座上略为提起,以检查安全阀开启的灵活性。

8、若介质温度较高时,为了降低弹簧腔室的温度,一般当封闭式安全阀使用温度超过300℃及敞开式安全阀使用温度超过350℃时,应选用带散热器的安全阀

9、若安全阀出口背压是变动的,其变化量超过开启压力的10%时,应选用波纹管安全阀。

10、安全阀的安装和维护应注意以下事项施工、安装要点1)、安装位置、高度、进出口方向必须符合设计要求,注意介质流动的方向应与阀体所标箭头方向一致,连接应牢固紧密。2)、阀门安装前必须进行外观检查,阀门的铭牌应符合现行国家标准《通用阀门标志》GB12220的规定。对于工作压力大于1.0MPa及在主干管上起到切断作用的阀门,安装前应进行强度和严密性能试验,合格后方准使用。强度试验时,试验压力为公称压力的1.5倍,持续时间不少于5min,阀门壳体、填料应无渗漏为合格。严密性试验时,试验压力为公称压力的1.1倍;试验持续的时间符合GB50243的要求.1.各种安全阀都应垂直安装。

11、安全阀出口处应无阻力,避免产生受压现象。

12、安全阀在安装前应专门测试,并检查其官密封性。

13、对使用中的安全阀应作定期检查。



1, steam boiler safety valve, generally used in open full-kai-type safety valve spring.

2, liquid medium with a safety valve, generally used in low lift spring safety valve.

3, air or other gas medium with a safety valve, generally used in closed full-kai-type safety valve spring.

4, liquefied petroleum gas tank car or liquefied petroleum gas railway tanker safety valve, generally used in the entire contents of kai-safety valve.

5, oil wells, export safety valve, pilot safety valve is generally used.

High pressure bypass valve 6, a steam power plant, pilot safety valve is generally used with double functions of security and control.

7, if asked to do regular opening test of safety valves, should be used with upgrading the safety valve wrench. When the medium pressure to open the pressure of more than 75%, can use to enhance wrench valve from the valve seat on a slightly raised, to check the safety valve to open flexibility.

8, if the medium temperature is high, in order to reduce the spring chamber temperature, generally when closed safety valve temperature over 300 and open safety valve using a temperature higher than 350 ℃, safety valve should be selected with radiator.

9, if the pressure change is the safety valve of exports, the variation is more than the opening pressure of 10%, should be used Bellows Safety valve.

10, safety valve installation and maintenance should pay attention to the following points in construction, installation points 1), location, height, must meet the design requirements of the import and export orientation, attention to the direction of media flow valve should be marked by the arrow direction, the connection should be firmly. 2), the valve must be installed prior to visual inspection, the valve plate should be consistent with the provisions of the current national standard GB12220 "universal valve logo". The working pressure greater than 1.0MPa and in the main pipe on the role played off valve, the installation should be carried out before the performance test the strength and tight, pass behind the prospective use. Strength test, the test pressure is 1.5 times the nominal pressure, duration of not less than 5min, the valve housing, packing should be no leakage for qualified. Tightness test, the test pressure is 1.1 times the nominal pressure; test duration to meet the requirements of.1. GB50243 safety valve should be installed vertically.

11, the safety valve outlet should be no resistance, to avoid compression phenomenon.

12, the safety valve should be specifically tested before installation, and check its official seal.

13, the use of safety valves should be regularly checked.

安全阀和减压阀、泄压阀、稳压阀的区别

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