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Type A21, KA21 Safety Valve

Safety Valves, angle type

Low lift safety valve

Metal to metal seated/soft seal

Connection end acc. to NPT/PT/G thread

Applications:

Provided as safety device for protection against excessive pressure in pressure vessels.

"Approved for  gases, vapours and fluids."

Working temperatures:

A21F, A21H-C;A21W-P,R ≤ 200℃

KA21Y ≤ 100℃

Standards Compliance:

Design and Manufacture: GB/T 12241-2005, GB/T 12243-2005

Face to Face(end to end): JB/T 2203-1999

Test and Inspection: GB/T 12243-2005


Material for main parts

NOName of partA21H-C/A21F,KA21Y-C MaterialA21W-P/A21F-P /KA21Y-P MaterialA21Y-R Materials
1Union20304316
2Union nut352Cr13304
3Nozzle35304316
4Body2Cr13304316
5Disc2Cr13/PTFE304/PTFE316
6Spring Washer2Cr13304316
7Spring50CrVA50CrVA coated teflon50CrVA coated teflon
8Locking NutQ235-A2Cr13304
9Spring guide2Cr13304316
10Adjust nutQ235-A2Cr13316
Sealing surface of material "H" depositing D507, "W" same as body, "Y" depositing stellite, "F" PTFE soft seal


Dimensions(mm)

TypeDNdodD0Md1D1LL1≈H
KA21Y-16C, A21H-16C,  A21H-40, A21W-16P, A21W-40P, KA21Y-16P15121520M27x1.5G1/2"30357666
20162025M33x1.5G3/4"34408768
25182531M39x1.5G1"4050100105
A21Y-64, A21Y-64P A21Y-100, A21Y-100P15101525M39x1.5G1"445010066
20102031M39x1.5G1"445010068
25122531M39x1.5G1"4450100105
A21W-160            A21W-160P15820/M24x2G1"4450100261
20825/M33x2G1"4450100261
25828/M36x2G1"4450100285

Remark: NPT, PT, G thread are accepted


Essential:

Valves are delivered at a set pressure, therefore when ordering 

Please confirm set pressure, medium and temperature

TS

Safety accessory and Safety protection device 

Manufacture License of Special Equipment, People's republic of China


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A21H

Versatile for Gas, Oil and Water