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Spring micro-opening type external thread safety valve

Spring micro-opening type external thread safety valve

Spring micro-opening type external thread safety valve (air safety valve, nitrogen safety valve, petroleum gas safety valve, natural gas safety valve) Introduction: A21F, A21H spring micro-opening external threaded safety valve is suitable for equipment or pipelines with media such as air, ammonia, petroleum gas, etc., whose working temperature is ≤200℃. A21W-P, R stainless steel spring micro-opening external thread safety valve is suitable for equipment or pipelines with corrosive gas or liquid at a temperature of ≤200℃, as an overpressure protection device. KA21Y spring micro-opening external thread anti-sulfur safety valve is suitable for liquefied petroleum gas whose temperature is ≤100℃.

  • Item NO.:

    XUVAL77-75
  • Lead Time:

    45Days
  • Product Orgin:

    CHINA
  • Brand:

    XUVAL
  • Shipping Port:

    Shanghai
  • Payment:

    100%TT
  • Color:

    Silvery
Products Details

Spring micro-opening type external thread safety valve

Threaded safety valve model: A21H A21W
Nominal diameter of threaded safety valve: 10mm-50mm
Threaded safety valve working pressure: 1.6MPa-32MPa
Threaded safety valve Connection mode: external threaded connection
Threaded safety valve form: spring type
The main function of the threaded safety valve: pressure relief protection
Threaded safety valve use medium: water, oil, steam
Threaded safety valve Material: cast steel. Stainless steel
Threaded safety valve Standard: Ministry of Machinery standard or customized non-standard


Material of main parts of external thread safety valve:
NO. Part Name
A21H-C/A21F material
A21W-P/A21F-P material
A21Y-R material
1 Pipe joint
20 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
2 Pipe joint nut
35 2Cr13 1Cr18Ni9Ti
3 Seat 35 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
4 Body 2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
5 Disc 2Cr13/2Cr13+PTFE 1Cr18Ni9Ti/1Cr18Ni9Ti+PTFE 1Cr18Ni12Mo2Ti
6 Spring seat
2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
7 Spring
50CrVA 50CrVA coated fluoroplastic
50CrVA coated fluoroplastic
8 fasten the screw nut
Q235-A ZG230-450 1Cr18Ni9Ti
9 Spring guide pad
2Cr13 1Cr18Ni9Ti 1Cr18Ni12Mo2Ti
10 Adjusting nut
Q235-A 2Cr13 1Cr18Ni12Mo2Ti
Sealing surface material
"Y" type surfacing Co-based hard alloy, "H" type surfacing D507, "W" type is the valve body


External thread safety valve dimensions and connection dimensions:
Model
Nominal diameter
do d DO M d1 D1 L L1 ≈H

KA21-16C

A21H-16C

A21H-40

A21W-16P

A21W-40P

KA21-16P

15 12 15 20 M27×1.5 G1/2" 30 35 76 66
20 16 20 25 M33×1.5 G3/4" 35 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


Structure diagram:


Packing & Delivery : 

Packing Details:all by seaworthy plywood case and packed strongly by packing belt as below
Delivery Details:Generally it is 5-10 days if the goods are in stock. or15-30 days if the goods are OEM or not
enough subject to the order quantity. But anyway, normally, we are able to make sure the delivery will not exceed 45days.


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    If you are interested in our valves and want to know more details,please leave a message here,we will reply you as soon as we can.