A butterfly valve includes a body and a gear box cover, the body having a fluid conduit and a gear platform supported on and over the fluid conduit, the gear platform configured to support a gear assembly for actuating a valve disk between an open position and a closed position, the gear box cover defining an internal cavity, the internal cavity sized to house the gear assembly, the gear box cover configured to be removably mounted to the platform such that the internal cavity is between the gear box cover and the platform.

A butterfly valve includes a body, a gear assembly, a shaft, a Scotch yoke actuator on the shaft, and a gear box cover. The body has a fluid conduit and a gear platform supported on and over the fluid conduit. The shaft passes through the gear platform. The gear assembly is supported on the gear platform and includes a valve stem with a first threaded portion and includes a pin nut with a second threaded portion engaging the first threaded portion. The Scotch yoke actuator engages the pin nut. The gear box cover defines an internal cavity sized to house the gear assembly.

Embodiments relate to a check valve and methods of making a check valve that include a valve body having an inlet end, an outlet end, a flow bore that extends between the inlet and outlet ends, a cavity which intersects the flow bore, and an opening which is connected to the cavity. In certain embodiments, the check valve further includes a cap removably secured in the opening, a seat cartridge disposed in the cavity, wherein the seat cartridge comprises a chamber with a flow bore, a retainer ring positioned in the valve body between the cap and the seat cartridge, a pivot pin retainer seal provided between the retainer ring and the valve body, wherein the pivot pin retainer seal comprises one or more protrusions extending outwardly in a radial direction from the retainer ring to seal on the valve body, and a flapper pivotally connected to the retainer ring, wherein the flapper is pivotable through the chamber between a closed position in which the flapper is positioned against a shoulder in the seat cartridge and an open position in which the flapper is displaced from the shoulder.

In a rotary actuator comprising a housing containing a piston and having a cover and a base, thread-like guide grooves in the piston, a shaft having a transverse axis and being rotatable about an axis of the rotary actuator which transverse axis engages into the guide grooves, and torque support engaging into guides in the piston, which torque supports are anchored in the housing, wherein the transverse axis on both ends comprises bushes contacting raceways of the guide grooves, each bush is cambered and each raceway is configured with an undercut corresponding to the cambering.

In a rotary drive with a housing that contains a piston, a lid and a bottom, screw thread-like guiding grooves in the piston, a shaft with a rotary axis that can be rotated around an axis of the rotary drive and that encroaches in the guiding grooves, and axially parallel torque supports that are attached in the lid and/or bottom and that are embedded in guidances in the piston, with each torque support having an approximately rectangular external cross-section with a load-specific design to support torques to be transmitted and having longer rectangle sides tangentially to the shaft and shorter rectangle sides approximately in directions towards the axis.

A valve arrangement includes a valve body having a stem rotatably attached at least partially within the body, a handle in operable communication with the stem and configured to rotate the stem by turning the handle, and an actuation portion in contact with the stem and configured to move when the handle is turned and the stem rotated. The actuation portion includes a carrier having an inner bore. The inner bore receives at least a portion of the stem. The stem includes first and second thread portions. The first thread portion has a first thread pitch at least partially received within the inner bore. The second thread portion is in communication with a bonnet attached to the body with a second thread pitch and moves the stem with respect to the body. The second pitch is smaller than the first pitch.

A fusible fire-proof emergency cut-off valve is provided. Two sides of a valve body are communicated with an outlet and an inlet, respectively. The inside of the valve body is rotationally connected with a rotating shaft. A valve plate is fixed to one side of the rotating shaft and is positioned at one end of the outlet. A control mechanism comprises a shifting fork box body, one side of the shifting fork box body is connected with a second cylinder, and the other side of the shifting fork box body is connected with a first cylinder. The other side of the rotating shaft is inserted into the shifting fork box body and fixedly connected with a shifting fork. The inside of the second cylinder is provided with a piston rod penetrating through the shifting fork box body and the first cylinder.

A failsafe module comprising an input member (310), an output member (312), and a coupling mechanism for coupling the input member to the output member. The coupling mechanism comprises an intermediate member (316a) movable relative to the output member to energise an energy storage device and a latch mechanism (318, 320) to hold the energy storage device in an energised state. When the latch mechanism is engaged, the input and output members are coupled together and the energy storage device is held in an energised state and isolated from the coupling between the input and output members. When the latch mechanism is released, the energy storage device can release its energy to drive the output member to a predetermined position.

A valve member is mounted on a shaft to pivot within a fluid passage. A control selectively moves a piston in a linear direction to control a position of the valve member in the fluid passage. The piston causes a roller pin to move as the piston moves linearly. The roller pin is mounted in crank collars of a crank shaft such that movement of the roller pin causes the crank collars to rotate crank shaft rotating position, and the valve shaft. The roller pin is mounted within the crank collars by bearings. The bearings each have an outer race associated with a crank collar, an inner race associated with the roller pin, and bearing members separate the inner and outer race. There is a spring bias resisting movement of the inner races relative to said roller pin. An anti-ice system is also disclosed.

An electromechanical actuating drive (1) for a bulk-goods shut-off element, comprising an electric motor (2) and a control and drive electronics unit (3) associated with the electric motor (2), wherein the electromechanical actuating drive (1) comprises a mechanism for storing energy.