Spring Loaded Low Lift Type Safety Valve

Spring loaded low lift type safety valve applications

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 brief figure of structure

Structure of Spring Loaded Low Lift Type Safety Valve pic 1
Structure of Spring Loaded Low Lift Type Safety Valve pic 2
Structure of Spring Loaded Low Lift Type Safety Valve pic 3

Spring loaded low lift type safety valve dimensions (mm)

Nominaldiameter
DN(mm)
Dimensions (mm)
d0 L L1 DN’
25 20 100 85 25
32 25 115 100 32
40 32 120 110 40
50 40 135 120 50
65 50 140 130 65
80 65 160 135 80
100 80 170 160 100
125 100 190 190 125
150 125 205 195 150
200 150 240 245 200
Nominal diameter
DN(mm)
Dimensions (mm)
d0 L L1 DN’
25 20 100 100 25
32 25 115 105 32
40 32 135 120 40
50 40 160 130 50
65 50 175 160 65
80 65 175 160 80
100 80 190 180 100
150 100 220 210 150
Nominal
Pressure
PN (MPa)
Nominal
Diameter
DN (mm)
Dimensions (mm)
d0 D D1 D2 L L1 H
  16 10 6 17 14 12 95 120 78
15 8 22 18 16 100 130 85
20 10 28 22 20 115 135 135
25 12 35 26 24 120 140 142
  32 10 6 22 14 12 95 120 80
15 8 25 17 15 100 130 90
20 10 30 22 20 115 135 140
25 12 38 26 24 120 140 148

Spring loaded low lift type safety valve materials for main parts


No.
Name of part A41H-C/KA41Y-C
Materials
A41Y-P/KA41Y-P
Materials
A41Y-R/KA41Y-R
Materials
1 Body WCB ZG1Cr18Ni9Ti ZG1Cr18Ni12Mo2Ti
2 Nozzle ZG2Cr13/1Cr18Ni9Ti ZG1Cr18Ni9Ti ZG1Cr18Ni12Mo2Ti
3 Adjusting ring ZG2Cr13/1Cr18Ni9Ti ZG1Cr18Ni9Ti ZG1Cr18Ni12Mo2Ti
4 Disc 2Cr13/1Cr18Ni9Ti 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
5 Guide sleeve ZG2Cr13/1Cr18Ni9Ti ZG1Cr18Ni9Ti ZG1Cr18Ni12Mo2Ti
6 Bonnet ZG230-450 ZG230-450 ZG230-450
7 Spring 50CrVA Coated Teflon Coated Teflon
8 Stem 2Cr13 2Cr13 1Cr18Ni12Mo2Ti
9 Adjusting bolt 45 2Cr13 2Cr13
10 Cap ZG200-400 ZG200-400 ZG200-400
Sealing surface of material D507 Depositing satellite

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

No. Name of part A47H  A41Y-160  A41Y-320
Materials
A41Y-160P  A41Y-320P
Materials
A41Y-160R  A41Y-320R
Materials
1 Flange 35/35CRMoA 2Cr13 1Cr18Ni9Ti
2 Nozzle 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
3 Body 35/40 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
4 Disc 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
5 Guide sleeve 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
6 Bonnet 50CrVA Coated Teflon Coated Teflon
7 Spring 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
8 Stem ZG230-450 1Cr18Ni9Ti 1Cr18Ni9Ti
9 Adjusting bolt 45 2Cr13 2Cr13
10 Cap ZG200-400 1Cr18Ni9Ti 1Cr18Ni9Ti
Sealing surface of seat and disc Depositing satellite

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