Safety Valve (เซฟตี้วาล์ว โปโล)

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A 41 H is to be used in equipments or pipelines of air, petroleum, water and other mediums with operation temperature no higher than 300℃, while A41Y 16/25/40P is to be used in equipments and pipelines of corrosive medium with operation tem-premature no higher than 200℃. A47H is to be used in equipments and pipelines of steam, air, water and other mediums with temper-nature no higher than 350℃. When the pressure in equipment or pipeline exceeds allowed value, the valve will open automatically and fully discharge, then close again when the pressure lowered to the regulated value so as to ensure the safe operation of the equipment or pipeline.
This valve is to be used in equipments and pipelines of air, petroleum, water or other mediums with operation temperature no higher than 300℃, while A47H is to be used in equipments and pipelines of steam, When the pressure in equipment or pipeline exceeds allowed value, the valve will open automatically and fully discharge, then close again when the pressure lowered to the regulated value soaps to ensure the safe operation of the equipment or pipeline. 
A61H/Y-160, A61H/Y-320 is to be used as over-pressure protection device in equipments and pipelines of mediums like air, am-mania, petroleum and other mediums with operation temperature no higher than 200℃, while A61Y-160P, A61Y-320P is to be used as a in equipments or pipelines of corrosive gas or liquid with temperature no higher than 200℃.


Spring loaded low lift type safety valve dimensions (mm)

Nominaldiameter
DN(mm)
Dimensions (mm)
d0LL1DN’
25201008525
322511510032
403212011040
504013512050
655014013065
806516013580
10080170160100
125100190190125
150125205195150
200150240245200
Nominal diameter
DN(mm)
Dimensions (mm)
d0LL1DN’
252010010025
322511510532
403213512040
504016013050
655017516065
806517516080
10080190180100
150100220210150
Nominal
Pressure
PN (MPa)
Nominal
Diameter
DN (mm)
Dimensions (mm)
d0DD1D2LL1H
  161061714129512078
15822181610013085
2010282220115135135
2512352624120140142
  321062214129512080
15825171510013090
2010302220115135140
2512382624120140148

Spring loaded low lift type safety valve materials for main parts


No.
Name of partA41H-C/KA41Y-C
Materials
A41Y-P/KA41Y-P
Materials
A41Y-R/KA41Y-R
Materials
1BodyWCBZG1Cr18Ni9TiZG1Cr18Ni12Mo2Ti
2NozzleZG2Cr13/1Cr18Ni9TiZG1Cr18Ni9TiZG1Cr18Ni12Mo2Ti
3Adjusting ringZG2Cr13/1Cr18Ni9TiZG1Cr18Ni9TiZG1Cr18Ni12Mo2Ti
4Disc2Cr13/1Cr18Ni9Ti1Cr18Ni9Ti1Cr18Ni12Mo2Ti
5Guide sleeveZG2Cr13/1Cr18Ni9TiZG1Cr18Ni9TiZG1Cr18Ni12Mo2Ti
6BonnetZG230-450ZG230-450ZG230-450
7Spring50CrVACoated TeflonCoated Teflon
8Stem2Cr132Cr131Cr18Ni12Mo2Ti
9Adjusting bolt452Cr132Cr13
10CapZG200-400ZG200-400ZG200-400
Sealing surface of materialD507Depositing satellite

Note: K----sulfur resistant safety valve.

No.Name of partA47H  A41Y-160  A41Y-320
Materials
A41Y-160P  A41Y-320P
Materials
A41Y-160R  A41Y-320R
Materials
1Flange35/35CRMoA2Cr131Cr18Ni9Ti
2Nozzle2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti
3Body35/401Cr18Ni9Ti1Cr18Ni12Mo2Ti
4Disc2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti
5Guide sleeve2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti
6Bonnet50CrVACoated TeflonCoated Teflon
7Spring2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti
8StemZG230-4501Cr18Ni9Ti1Cr18Ni9Ti
9Adjusting bolt452Cr132Cr13
10CapZG200-4001Cr18Ni9Ti1Cr18Ni9Ti
Sealing surface of seat and discDepositing satellite