Gate valve
Gate valve
Gate valve
Gate valve
Gate valve
Gate valve
Gate valve
Gate valve
Gate valve actuator
Gate valve actuator
Gate valve and method of manufacture
Gate valve assembly
Gate valve fabricated from pipe
Gate valve for particulate materials
Gate valve for two way flow
Gate valve for vacuum and seal member used therefor
Gate valve having a pressure-secured seat
Gate valve having O-ring seal
Gate valve having removable seals
Gate valve seal system