A valve apparatus, in particular a ball valve apparatus, is provided. The apparatus includes a housing device having at least one fluid port, a closure body, wherein the closure body includes an axis of rotation about which the closure body can be rotated in a direction of rotation in order to release and close the fluid port, wherein the fluid port includes a seal for sealing abutment against the closure body. The seal includes a first and a second sealing lip, wherein the sealing lips are configured such that, during operation, only one seal sealingly abuts against the closure body.

A method of sealing a coolant control valve of a cooling system for a power device which generates heat as a by-product of operation. The cooling system includes a pump, a heat exchanger, and coolant. The valve includes: an internal channel in fluid communication with the exchanger; a sealing package in contact a surface of the coolant control valve and bounding a portion of the cooling system and the channel; and a rotary element in the channel and rotatable to open and close the valve. The portion is bounded in part by the valve and the sealing package. The method includes: starting-up the device; creating a pressure differential of at least 0.2 bar between the coolant in the portion of the cooling system, and the coolant in the internal channel; rotating, using a motor, the rotary element; opening the valve; and pumping, using the pump, the coolant through the internal channel.

A control valve includes a valve housing, a joint member, a valve body, and a sealing tube member. The sealing tube member has a biasing pressure receiving surface that receives a pressure of a liquid inside the valve housing and biases the sealing tube member to the valve body side. An area S1 of the biasing pressure receiving surface and an area S2 of a valve sliding contact surface of the sealing tube member are set to satisfy Expressions (1) and (2),
S1<S2≤S1/k   (1)
α≤k<1   (2) where k is a pressure reduction constant of a liquid flowing through a minute gap between the valve sliding contact surface and the valve body, and α is a lower limit value for the pressure reduction constant determined based on physical properties of a liquid.

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.

The present disclosure provides a seal member that is applied to a valve assembly. The seal member includes: a cylindrical metal part supporting the seal member and defining a channel through which cooling water flows; and a valve seat provided to surround an outer surface of the cylindrical metal part and keeping the valve assembly hermetic, in which the valve seat has a first sealing portion protruding from a second end of the cylindrical metal part in an opposite direction to a direction in which the cylindrical metal part extends.

A fluid valve includes a valve body and a plug. The body includes a chamber and ports that communicate with the chamber. The plug is rotatably disposed in the chamber, and includes a seal disposed in an annular groove provided on the plug surface. An elastic member is disposed in the groove, and biases the seal against an inner surface of the chamber. The seal includes a seal retaining feature that is configured to retain the seal within the groove.

Provided is a three-way valve for flow rate control capable of suppressing an increase in driving torque for a valve body, which is caused due to contact between the valve body and a valve port forming member. The three-way valve for flow rate control includes: a valve main body (6) including a valve seat (8), the valve seat (8) having a columnar space and having a first valve port (9), which allows outflow of a fluid and has a rectangular cross section, and a second valve port (18), which allows outflow of a fluid and has a rectangular cross section; first and second valve port forming members (70) (80), which are fitted to the valve main body (6) and form the first valve port (9) and the second valve port (18), respectively; a valve body (34) being provided in a freely rotatable manner in the valve seat (8) of the valve main body (6) so as to simultaneously switch the first valve port (9) from a closed state to an opened state and switch the second valve port (18) from an opened state to a closed state, the valve body (34) having a cylindrical shape and having an opening; a pressure applying portion (94) (96) configured to apply pressures of the fluid leaking through a gap between the valve body (34) and the valve seat (8) to the first and second valve port forming members (70) (80) so as to suppress shift of a position of the valve body (34) when the valve body (34) opens and closes the first valve port (9) and the second valve port (18); and drive means (3) for driving the valve body (34) to rotate.

A valve core comprises a columnar body with a first water passage hole, a buffer groove being disposed on the body and located at an outside of the first water passage hole; a sealing block matched with the buffer groove and being disposed inside the buffer groove; wherein a partitioning portion is disposed between the buffer groove and the first water passage hole, a connection hole is disposed in the partitioning portion capable of communicating the buffer groove with the first water passage hole. through the provision of the partitioning portion, avoids the direct impact of the water flow on the sealing block, and eliminates the unstable factors caused by water flow on the sealing block, so that the sealing block is pressed tightly on an inner wall of a valve body.

The present disclosure provides a seal member that is applied to a valve assembly. The seal member includes: a cylindrical metal part supporting the seal member and defining a channel through which cooling water flows; and a valve seat provided to surround an outer surface of the cylindrical metal part and keeping the valve assembly hermetic, in which the valve seat has a first sealing portion protruding from a second end of the cylindrical metal part in an opposite direction to a direction in which the cylindrical metal part extends.

A fluid valve includes a valve body and a plug. The body includes a chamber and ports that communicate with the chamber. The plug rotates within the chamber, and includes a seal disposed in an annular groove provided on the plug surface. An elastic member is disposed in the groove, and biases the seal against an inner surface of the chamber. When the plug is oriented relative to the body so that the groove is aligned with a port, the seal segregates the chamber into a first chamber that borders an outer surface of the seal and a second chamber that borders an inner surface of the seal, and provides a fluid-tight seal between the first chamber and the second chamber. In addition, the seal inner and outer diameters vary based on a fluid pressure difference across the seal.