Products
Use：
A21H type suitable for the working temperature ≤ 200 ° C air, ammonia, liquefied petroleum gas (LPG) and other media equipment and piping. A21W type suitable for the working temperature ≤ 200 ° C or corrosive gas or liquid equipment and pipeline of ≤ 120 ° C liquefied petroleum gas equipment and pipeline the A21F type applicable to operating temperature, as overpressure protection device.
Main connection dimensions：
| Item NO. | (DN) | do | d | Do | M | d1 | D1 | L | L1 | ≈H |
| A21H/W/F-16C/P/R A21H/W/F-25C/P/R A21H/W/F-40C/P/R |
15 | 12 | 15 | 20 | M27×1.5 | G1/2〞 | 30 | 35 | 81 | 66 |
| 20 | 16 | 20 | 25 | M33×1.5 | G3/4〞 | 34 | 40 | 87 | 68 | |
| 25 | 18 | 25 | 31 | M39×1.5 | G1〞 | 44 | 52 | 100 | 105 | |
| A21Y/W-64C/P/R A21Y/W-100C/P/R |
15 | 10 | 15 | 25 | M36×1.5 | G1〞 | 44 | 52 | 100 | 105 |
| 20 | 10 | 20 | 31 | M39×1.5 | G1〞 | 44 | 52 | 100 | 105 | |
| 25 | 12 | 25 | 31 | M42×1.5 | G1〞 | 44 | 52 | 100 | 105 |
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