A valve for use in oil and gas production or similar applications includes a plug or other flow barrier disposed in a cavity of a hollow valve body with a metal-to-metal sealing surface that is not reliant on any rubberized or elastomeric material to effect a seal.

A bi-directional floating plug that utilizes pressure from fracturing, wirelines, etc. to set a metal-to-metal seal against a fixed insert within a valve body, and a secondary seal via a energized fluid within a sealing groove while the metal-to metal seal is retained.

A bi-directional floating plug that utilize pressure from fracturing, wirelines, etc. to set a metal to metal seal against a fixed insert within a valve body

A distribution valve includes a cylindrical valve body rotatably fitted into a valve main body having a first outlet, a second outlet, and an inlet, and a driver for rotating the valve body, and the distribution valve distributes fluid flowing from the inlet into the valve body to the first and second outlets. The valve body has a peripheral wall portion and a bottom surface portion that function as seal surface portions to close the first and second outlets and the inlet. The peripheral wall portion is formed with first and second opening portions configured to continuously change opening areas of the first and second outlets. The bottom surface portion is formed with a third opening portion configured to change an opening area of the inlet within a predetermined range. A valve seat member is arranged in the inlet, causing a seal portion to adhere to the bottom surface portion.