Muaj pes tsawg hom rooj vag li qub raug cais raws li lawv cov qauv tsim?

Lub rooj vag valve-- nce qia rooj vag valve thiab tsis nce qia rooj vag valve

Rising qia rooj vag valve-- hom kab thiab kab sib txuas
Wedge type - resilient gate valve thiab rigid gate valve
Rigid gate valve - ib lub rooj vag valve thiab ob lub rooj vag valve
Parallel type--rigid gate valve
Rigid gate valve - ib lub rooj vag valve thiab ob lub rooj vag valve

Tsis nce qia rooj vag valve-- rooj vag valve-- rooj vag valve
Rigid gate valve - ib lub rooj vag valve thiab ob lub rooj vag valve