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PRESSURE SAFETY VALVE

A21H/Y/W/F spring micro-open closed safety valve

  • Product Category:PRESSURE SAFETY VALVE
  • Product Name:A21H/Y/W/F spring micro-open closed safety valve
  • Product Tag:Pressure Safety Valve Manufacturer In China
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Product Introduction

Brief introduction of external thread spring micro-opening stainless steel safety valve(A21H)

A21 Series

A21F-16C A21H-16C A21H-40 A21H-64 A21Y-100 A21H-160 A21W-16P A21W-40P A21F-40P A21W-64P A21W-100P A21W-160P KA21Y-16C KA21Y-16P A21Y-16R A21Y-40R A21Y- 64R A21Y-100R A21Y-160R

A21H spring micro-opening type external thread safety valve is suitable for equipment and pipelines with air, nitrogen, petroleum gas and other media whose working temperature is ≤200℃. A21W type is suitable for equipment and pipelines with working temperature ≤200℃ and containing corrosive gas or liquid. Type A21F is suitable for equipment and pipelines such as liquefied petroleum gas and petroleum gas whose working temperature is ≤200℃, as an overpressure protection device.

Spring inching stainless steel valve main part materials Explanation of materials for main parts
NO. Name of part A21H-C/A21F KA21Y-C Materials A21W-P/A21F-P KA21Y-P Materials A21Y-R Materials
1 Union 20 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
2 Union nut 35 2Cr13 1Cr18Ni9Ti
3 Nozzle 35 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
4 Body 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
5 Disc 2Cr13/2Cr13+PTFE 1Cr18Ni9Ti/1Cr18nI9Ti+PTFE 1Cr18Ni12Mo2Ti
6 Spring washer 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
7 Spring 50CrVA 50CrVA Coated Teflon 50CrVA Coated Teflon
8 Locking nut Q235-A 2Cr13 1Cr18Ni9Ti
9 Spring guide 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
10 Adjusting nut Q235-A 2Cr13 1Cr18Ni12Mo2Ti

Sealing surface of material "Y" Co Depositing stellite, "H" D507 Depositing D507, "W" body
Dimensions (mm) ofspring micro-opening stainless steel safety valve
Type (DN)

Nominal diameter

do d Do M d1 D1 L L1 H
KA21Y-16C A21H-16C A21H-40

A21W-16P A21W-40P KA21Y-16P

15 12 15 20 M27 1.5 G1/2" 30 35 76 66
20 16 20 25 M33 1.5 G3/4" 34 40 87 68
25 18 25 31 M39 1.5 G1" 40 50 100 105
A21Y-64

A21Y-64P A21Y-100

A21Y-100P

15 10 15 25 M39 1.5 G1" 44 50 100 66
20 10 20 31 M39 1.5 G1" 44 50 100 68
25 12 25 31 M39 1.5 G1" 44 50 100 105
A21W-160

/160P

15 8 20 / M24 2 G1" 44 50 100 261
20 8 25 / M33 2 G1" 44 50 100 261
25 8 28 / M36 2 G1" 44 50 100 285

A21H spring micro-opening type external thread safety valve

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