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Classification：Relief valve
Trade names：
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| Opening a little type relief valve of other whorl of spring |
| Type of the products: A21F-16C , A21H-16C , A21W-16P , A21Y-16R |
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| A21F , A21H-C type are suitable for working temperature ≤ air , ammonia , oil gas of 200 degrees Centigrade Wait for it on the equipment or pipeline of the medium. A21W-P , R type are suitable for temperature ≤ 200 degrees Centigrade of gas or liquid equipment or pipeline with corrosivity , as exceeding pressing protectors. KA21Y type is suitable for temperature ≤ liquefied petroleum gas of 100 degrees Centigrade ,etc..
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Main spare part material :
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NO.
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Part name
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A21H-C/A21F material
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A21W-P/A21F-P material
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A21Y-R material
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1
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The tube connecting
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20
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1Cr18Ni9Ti
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1Cr18Ni12Mo2Ti
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2
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In charge of connecting the nut
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35
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2Cr13
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1Cr18Ni9Ti
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3
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Valve seat
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35
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1Cr18Ni9Ti
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1Cr18Ni12Mo2Ti
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4
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The valve has body
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2Cr13
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1Cr18Ni9Ti
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1Cr18Ni12Mo2Ti
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5
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Valve one
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2Cr13/2Cr13+PTFE
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1Cr18Ni9Ti/1Cr18Ni9Ti+PTFE
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1Cr18Ni12Mo2Ti
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6
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Spring seat
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2Cr13
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1Cr18Ni9Ti
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1Cr18Ni12Mo2Ti
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7
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Spring
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50CrVA
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50CrVA wraps up and covers the fluoroplastics
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50CrVA wraps up and covers the fluoroplastics
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8
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Locknut
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Q235-A
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ZG230-450
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1Cr18Ni9Ti
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9
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The spring leading and padding
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2Cr13
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1Cr18Ni9Ti
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1Cr18Ni12Mo2Ti
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10
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Regulate the nut
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Q235-A
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2Cr13
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1Cr18Ni12Mo2Ti
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Seal the surface material
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" Y " type piles and welds the base hard alloy of Co, " H " type piles and welds D507, " W " type is a noumenonn of the valve
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External dimension and size of connecting :
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Type
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Nominal and open directly
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do
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d
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Do
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M
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d1
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D1
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L
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L1
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≈ H
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KA21-16C
A21H-16C
A21H-40
A21W-16P
A21W-40P
KA21-16P
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15
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12
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15
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20
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M27* 1.5
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G 1 /2"
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30
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35
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76
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66
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20
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16
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20
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25
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M33* 1.5
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G 3 /4"
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35
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40
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87
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68
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25
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18
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25
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31
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M39* 1.5
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G1"
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40
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50
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100
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105
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A21Y-64
A21Y-64P
A21Y-100
A21Y-100P
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15
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10
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15
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25
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M39* 1.5
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G1"
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44
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50
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100
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66
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20
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10
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20
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31
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M39* 1.5
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G1"
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44
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50
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100
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68
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25
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12
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25
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31
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M39* 1.5
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G1"
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44
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50
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100
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105
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A21W-160/160P
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15
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8
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20
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/
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M24* 2
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G1"
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44
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50
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100
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261
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20
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8
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25
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/
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M33* 2
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G1"
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44
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50
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100
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261
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25
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8
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28
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/
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M36* 2
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G1"
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44
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50
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100
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285
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