A centric butterfly valve (1) in which top and bottom boss surfaces (19, 29) are formed to be spherical, an outer peripheral end of the blade portion of the valve disk (24) is formed to be an M-shaped section part (29) with round-shaped apex parts (27) and a round-shaped valley part (28) smoothly linked, and the centric butterfly valve has a valve disk (3) having an extended part (41) obtained by successively and slightly extending the spherical surface of each of the top and bottom boss surfaces (19, 20) to a blade portion (40) side.

A resilient seal includes an annular body portion and a seating surface defined by the annular body portion and configured to interface with a seat of a subsurface safety valve. The resilient seal further includes a plurality of sealing surfaces defined by the annular body portion. Each sealing surface of the plurality of sealing surfaces is positioned to interface with a flapper of the subsurface safety valve in a closed position of the flapper of the subsurface safety valve. Additionally, the resilient seal includes at least one annular channel defined by the annular body portion between adjacent sealing surfaces of the plurality of sealing surfaces.

In accordance with various embodiments, a plug head assembly is provided comprising a ceramic plug head having a frustroconical geometry, wherein the ceramic plug head has a proximal terminus and a distal terminus, wherein the ceramic plug head has a first coefficient of thermal expansion (CTE), a sleeve having a frustroconical geometry conforming to the ceramic plug head and a second CTE, wherein the second CTE is greater than the first CTE, a distal retainer having a frustroconical geometry conforming to the sleeve, the distal retainer having a first engagement portion for engaging the a proximal retainer, the proximal retainer having a second engagement portion for engaging the distal retainer, and a base that couples with the proximal retainer. In addition, thick banded plug heads are provided.

A valve rotor for a solenoid valve includes a base body and a ram that cooperates with a valve seat. A damping device is arranged between the ram and the base body. The damping device has a cavity that is configured to be filled with a damping medium and a choke opening through which the damping medium flows into or out of the cavity. The damping device damps a pulse that occurs when the ram hits the valve seat. A valve cartridge includes the valve rotor.

A valve rotor for a solenoid valve includes a base body and a ram that cooperates with a valve seat. A damping device is arranged between the ram and the base body. The damping device has a cavity that is configured to be filled with a damping medium and a choke opening through which the damping medium flows into or out of the cavity. The damping device damps a pulse that occurs when the ram hits the valve seat. A valve cartridge includes the valve rotor.

A safe, economical, lightweight, ergonomic, and easy to use improved hand valve capable of handling high pressures with either air or liquid media for use in industrial environments. The industrial high pressure hand valve is of the type similar to a floating ball check valve, but with a unique way of achieving the sealing engagement that provides a completely positive shutoff so that absolutely no leakage of the air or liquid media occurs whether operated at high or low pressures. The industrial high pressure hand valve is comprised of a valve body, an ergonomic handle grip, a live swivel, a hose barb, and a nozzle for either air or liquid media. The industrial high pressure hand valve is designed in such a way that other accessory components, such as extended nozzles, can be threadably connected thereto. A handle connected to the valve body controls the flow of the media and when released provides an automatic and completely positive shutoff.

An electromagnetically actuatable proportional valve (1), in particular differential pressure valve for use in CO.sub.2 air conditioning compressor arrangements, comprising an electromagnetic actuator (3) for adjusting a valve body (2) relative to a valve seat (5), wherein the valve seat (5) is assigned a first pressure connection (7), via which a fluid can flow bypassing the valve body (2) to a second pressure connection (9), wherein the valve body (2) delimits a diffuser chamber (30) which with the valve body (2) lying against the valve seat (5) is connected in a fluid-conducting manner with the first pressure connection (7) via a fluid connection (22) delimited by the valve body (2).

The present invention relates to a female cartridge coupling of the type suitable for being inserted into a support block, or manifold, which is connectable to a pressurized oil circuit on board the machine.

The female cartridge coupling in accordance with the present invention is characterized in that although it is configured to be inserted into a support block, it is suitable for being connected to Standard ISO 16028-compliant flush-face male couplings.

The cartridge in accordance with the present invention further comprises a system for mechanically locking the decompression valve which allows the connection of a male coupling.

A valve device for switching or metering a fluid includes a housing, a flow channel defined by the housing, and a valve body arranged in the flow channel. The valve body has a sealing section which contacts a housing-side sealing seat when the valve device is closed. The sealing section at least slightly protrudes beyond a surface of the valve body facing the sealing seat.

A valve device for switching or metering a fluid includes a housing, a flow channel defined by the housing, and a valve body arranged in the flow channel. The valve body has a sealing section which contacts a housing-side sealing seat when the valve device is closed. The sealing section at least slightly protrudes beyond a surface of the valve body facing the sealing seat.