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
Gate valve seat
Gate valve sleeve
Gate valve structure
Gate valve structure
Gate valve with dual seal rings on a unitary seat ring
Gate valve with improved seal unit
Gate valve with lock ring
Gate valve with lubricated secondary seal
Gate valve with offset valve stem