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A double-sided valve 2012-01-13
A patent document 1 (U.S. Pat. No. 6,390,448) discloses a gate valve wherein mutually opposing walls of the gate valve body are formed with a PC (process chamber) opening and a TC (transfer chamber) o
A packingless gate valve 2012-01-12
A packingless gate valve is disclosed which includes a housing having opposed similar housing halves with resilient sleeve units which compressibly engage each other in the valve open condition and en
A coated gate for a gate valve 2012-01-11
A method of forming a coated gate for a gate valve, the gate incorporating a coupling member which is located with a clearance fit in an undercut groove in the gate and which is formed with a screw-th
A packingless gate valve 2012-01-10
A packingless gate valve is disclosed which includes a housing having opposed similar housing halves with resilient sleeve units which compressibly engage each other in the valve open condition and en
A "soft seal" type gate valve 2012-01-06
Gate valves of various types have been in use for many years. In general, gate valves are so called "hard seal" valves in which the gate valve is sealed in a metal to metal or hard seal. Such hard sea
An improved gate for gate valve 2012-01-05
The improved gate valve includes a body having horizontal inlet and outlet fluid flow passageways that are coaxial and that intersect a valve body cavity. A first annular seat is positioned in the bod
Basic gate valve 2012-01-04
Many types of valves exist for industrial application including ball valves, globe valves, butterfly valves, plug valves and so forth but a type of valve that has been universally popular, particularl
High-temperature gate valve 2011-12-31
A high-pressure, high-temperature gate valve which uses a flat faced gate seating on a flat and preferably interchangeable seat, the gate having a wedge-shape on the upstream side which assists in for
