1 steamBoiler Safety valve General selection of open, full openingSpring safety valve;

2 liquid mediumSafety valve, generally choose micro-lift typeSpring safety valve;

3 air or other gas mediumSafety valve, generally adopts sealed full-lift typeSpring safety valve;

4 liquefied petroleum gas or liquefied petroleum gas railway tanker safety valve, generally adopts full opening insideSafety valve;

5 wells for exportSafety valve, general selectionPilot operated safety valve;

The 6 steam generating device of high pressure bypassSafety valveGenerally used, with safety and control functionsPilot operated safety valve

7 if the request to open the safety valve to do regular test, should be used with upgrading the safety valve wrench.When the medium pressure to open the pressure of more than 75% of the time, can use to enhance wrench valve from the valve seat on a slightly raised, in order to checkSafety valveThe flexibility of opening;

8 if the medium temperature is high, in order to reduce the spring chamber temperature, usually whenEnclosed type safety valveThe use of temperature is higher than 300 DEG C and open type safety valve temperature higher than 350 DEG C,air compressor. should be used with radiatorSafety valve;

9 IfSafety valveOutlet pressure is fluctuant, change in excess 10% of opening pressure, should chooseBellows safety valve;

10 if the media is corrosive, should chooseBellows safety valve, to prevent the important parts due to corrosion and failure.

A:Safety valve common causes of failure andA:The arrangement of the safety valve of the four main pointsBall valve working principle, characteristics, classification, installation and maintenance is introduced and the solution2009-9-12Hydrophobic valve working principle2009-9-12Hydraulic control valve working principle and structure2009-9-12Pressure reducing valve working principle and selection2009-9-12Needle valve working principle2009-9-12 related products:A41Y stainless steel high pressure safety valveA47H, A47Y type steam safety valveA27H, A27Y type oxygen safety valveAY42H, YA802Y type safety relief valveA41Y spring micro-open closed type high pressure safety valveA42Y-160 / 320 spring full-open closed type high pressure safety valveA47H / W wrench spring micro-open type safety valveA42Y spring full-open type safety valve is closedAH42F liquefied petroleum gas safety valve,air compressor. safety valveParallel type safety valveA38Y-16C / 25 / 40 duplex safety valveWA42Y Balanced Bellows Safety ValveA21F, A21H, A21Y spring micro-open type external thread safety valveA41H spring micro-open enclosed type safety valveA28H / W-16-40 with handle spring full-open type safety valveSafety valve of air compressor href =AQ series safety valve of air compressorA61H-160-320 spring micro-open type high pressure safety valve (welding)A42Y-1000 full-lift type ultra high pressure safety valveSFA48Y high temperature and high pressure safety valve (power station)A40Y strip radiator spring full-open type safety valveA49H main safety valveGA44H-16C / 25 / 40GA44H-64 double lever safety valveGA41H-16C / 25 / 40A51H-16C / 25 / 40 single lever safety valveAx46F (Y) pilot operated safety valveGYA series hydraulic safety valveSFA72W-10P / 10R vacuum negative pressure safety valveType A27H / W micro open spring type safety valveA48Y-16-25 spring full-open type safety valve (flanged)

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