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A21H Spring Micro opening External Thread Safety Valve
A21H spring micro opening external thread safety valve is suitable for equipment and pipelines with working temperature ≤ 200 ℃ for media such as air,
Product details
A21H spring micro opening external thread safety valve is suitable for equipment and pipelines with working temperature ≤ 200 ℃ for media such as air, ammonia, petroleum gas, etc. The A21W type is suitable for equipment and pipelines containing corrosive gases or liquids with a working temperature of ≤ 200 ℃, while the A21F type is suitable for equipment and pipelines containing liquefied gas, petroleum gas, etc. with a working temperature of ≤ 200 ℃, as an overpressure protection device. When the pressure inside the equipment and pipeline exceeds the allowable value, the valve will automatically open and then discharge the full amount; When the pressure drops to the specified value, the valve automatically closes to ensure the safe operation of equipment and pipelines.
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operation temperature
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A21H type≤ 200 ℃ A21W type ≤ 200 ℃ A21F type -40 ℃~80 ℃
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Applicable Medium
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RA21H type is suitable for air, ammonia, petroleum gas, water, etcRA21W is suitable for corrosive gases or liquids, while RA21F is suitable for liquefied petroleum gas
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Main overall dimensions
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Nominal DiameterDN/mm
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size(mm)
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||||
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D0
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d0
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L
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L1
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G
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15
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20
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12
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35
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65
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G1/2'
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20
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25
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16
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42
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76
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G3/4'
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25
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31
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20
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50
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84
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G1'
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32
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ZG1 1/4'
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25
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55
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85
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G1 1/4'
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40
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ZG1 1/2'
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32
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55
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84
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G1 1/2'
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50
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AG2'
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40
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67
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101
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G2'
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65
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ZG2 1/2'
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50
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76
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120
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G2 1/2'
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80
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ZG3'
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65
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83
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135
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G3'
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