Spring Fall Lift, Low Lift Thread Safety Valve
manufacturer: KaiWeiXi Valve group Co., Ltd.
Eml: merry@kaiweixi.com
Tel: +86 (577) 6719 8981
Mob: +86 1815 7711 652（WeChat Same Account）
product drawing
A28H-16
A27H-1
A21H-16
A28H 16/25/40 type spring fall lift safety valve with handle
Dimensions & constructral diagram
A28H-16 constructral diagram
A27H-1 constructral diagram
A21H-16 constructral diagram
External and connection dimensions（mm）
| nominal diameter DN(mm) | Dimensions(mm) | ||||
| do | Rc〞 | L | L1 | G〞 | |
| 15 | 10 | ZG1/2 | 37 | 62 | G3/4 |
| 20 | 12 | ZG3/4 | 40 | 65 | G1 |
| 25 | 15 | ZG1 | 45 | 72 | G11/4 |
| 32 | 20 | ZG11/4 | 55 | 85 | G11/2 |
| 40 | 25 | ZG11/2 | 67 | 100 | G2 |
| 50 | 32 | ZG2 | 76 | 112 | G21/2 |
| 65 | 40 | ZG11/2 | 110 | 135 | G3 |
| 80 | 50 | ZG3 | 110 | 145 | G4 |
A21H-16C/25/40 A21W-16/25/40P A24F16/25/40 type low lift safety valve
External and connection dimensions（mm）| nominal diameter DN(mm) | Dimensions(mm) | ||||
| Do | do | L | L1 | G〞 | |
| 15 | 20 | 12 | 35 | 65 | G5/8 |
| 20 | 25 | 16 | 42 | 76 | G3/4 |
| 25 | 31 | 20 | 50 | 84 | G1 |
| 32 | ZG11/4 | 25 | 55 | 85 | G11/4 |
| 40 | ZG11/2 | 32 | 55 | 84 | G11/2 |
| 50 | ZG2 | 40 | 67 | 101 | G2 |
| 65 | ZG21/2 | 50 | 76 | 120 | G21/2 |
| 80 | ZG3 | 65 | 83 | 135 | G3 |
applicable medium：A21H type is applied to air, ammonia,petroleum gas, water, etc.
A21W type is applied to corrosive gas or liquid
A21F type is applied to liquefied petroleum gas
A27H-16/25/40 A27W-16/25/40P type spring low lift safety valve
External and connection dimensions（mm）| nominal diameter DN(mm) | Dimensions(mm) | ||||
| do | Rc〞 | L | L1 | G〞 | |
| 15 | 10 | ZG1/2 | 40 | 60 | ZG1/2 |
| 20 | 15 | ZG3/4 | 45 | 70 | ZG3/4 |
| 25 | 20 | ZG1 | 50 | 80 | ZG1 |
| 32 | 25 | ZG11/4 | 55 | 85 | ZG11/4 |
| 40 | 32 | ZG11/2 | 55 | 84 | ZG11/2 |
| 50 | 40 | ZG2 | 67 | 101 | ZG2 |
| 65 | 50 | ZG11/2 | 76 | 120 | ZG21/2 |
| 80 | 65 | ZG3 | 110 | 135 | ZG3 |
