Structure classification
According to the structure, it can be divided into three types: lift check valve, swing check valve, and butterfly check valve:
1. Lift check valves are divided into two types: vertical and horizontal.
2. The swing check valve is divided into three types: single, double, and multiple.
3. The butterfly check valve is a straight-through type.
The above check valves can be divided into four types in connection form: threaded connection, flange connection, welding connection, and wafer connection.
Material classification
1. Cast iron check valve
2. Brass check valve
3. Stainless steel check valve
4. Carbon steel check valve
5. Forged steel check valve
Function classification
1. swing type check valve
2. non return check valve
3. swing check valve
4. double check valve
5. wafer check valve
6. non slam check valve
7. rubber check valve
8. double check valve
9. spring check valve
10. dual check valve
11. non slam check valve
12. silent check valve
