ERHARD can provide almost very kinds of valves used in the water and sewage industry, e.g., modulating needle valves( also called piston type axial flow control valves), measuring needle valves, main bursting valves, hydraulic operated butterfly valves, gate valves, penstocks, knife gate valves, butterfly valves, diaphragm valves, ball valves, check valves, air valves, pressure reduction valves, float valves, control valves, high backpressure drainage valves and so on. Totally there are more than 60 kinds of valves that ERHARD manufactured.