Abstract: A fluid regulator includes an actuator assembly disposed in a valve body. A sleeve includes a cylindrical wall, a first plate, and a second plate. Each of the first plate and the second plate is disposed in a cavity of the sleeve. A stem extends through the sleeve and is axially aligned with a longitudinal axis of the body, and includes a passage extending partially through the stem. The actuator assembly includes first and second pistons. First, second, third, and fourth chambers are separately disposed between the sleeve, the first or second plate, or the first or second piston. The first and third chambers are in fluid communication, and the second and fourth chambers are in fluid communication via the passage of the stem. The actuator assembly actuates a control element in response to a fluid pressure receivable in the first, second, third, and/or fourth chambers.

Abstract: A fluid regulator includes an actuator assembly disposed in a valve body. A sleeve includes a cylindrical wall, a first plate, and a second plate. Each of the first plate and the second plate is disposed in a cavity of the sleeve. A stem extends through the sleeve and is axially aligned with a longitudinal axis of the body, and includes a passage extending partially through the stem. The actuator assembly includes first and second pistons. First, second, third, and fourth chambers are separately disposed between the sleeve, the first or second plate, or the first or second piston. The first and third chambers are in fluid communication, and the second and fourth chambers are in fluid communication via the passage of the stem. The actuator assembly actuates a control element in response to a fluid pressure receivable in the first, second, third, and/or fourth chambers.

Abstract: A valve stem and valve core assembly and a valve including a valve stem and valve core assembly. The valve stem and valve core assembly includes a valve stem and a valve core that sleeves the valve stem. The assembly includes an adjusting device arranged on the valve stem, and an elastic element arranged between the adjusting device and the valve core. A clearance exists between the valve core, the valve stem, and the adjusting device, so that the valve core can move relative to the valve stem, such that the valve can have a good closing performance.

Abstract: A driving apparatus and a valve including the same. The driving apparatus senses a pressure of a fluid medium and generates a driving force. The driving apparatus includes: a drive shaft, a sensing device, a limiting device, a support body, and a protruding member. The limiting device includes a groove, and the protruding member is engaged in the groove. The limiting device can thus automatically limit the rotation of the drive shaft, so as to avoid damaging the sensing device, thereby facilitating maintenance and installation of the valve.

Abstract: A drive device and a valve including the drive device. The drive device senses the pressure of a working medium and generates a drive force to control the flow of the working medium. The drive device includes a sensing part with a chamber and a drive shaft. Vents and an air exhausting device are arranged on the chamber. The drive device and the valve including such a drive device can exhaust air entering the chamber along with the working medium out of the chamber by the vents on the chamber thereby optimizing the performance of the drive device and the valve and helping to keep the valve operating in a stable manner.

Abstract: The present invention relates to a valve stem and valve core assembly and a valve comprising the assembly. The valve core sleeves the valve stem, an adjusting device is arranged on the valve stem, an elastic element is arranged between the adjusting device and the valve core, and a clearance exists among the valve core, the valve stem and the adjusting device, so that the valve core can move relative to the valve stem and the valve can have a good closing performance.

Abstract: The invention relates to a drive device and a valve comprising the drive device; the drive device senses the pressure of the working medium and generates the drive force to control the flow of the working medium; the drive device comprises a sensing part with a chamber and a drive shaft; vents and an air exhausting device are arranged on the chamber. The drive device and the valve comprising the drive device in the invention can exhaust air entering the chamber along the working medium out of the chamber by the vents on the chamber; and it optimizes the performance of the drive device and the valve and keeps the work stability.

Abstract: The present invention relates to a driving apparatus and a valve including the same. The driving apparatus senses a pressure of a fluid medium and generating a driving force, and includes: a drive shaft, a sensing device, a limiting device, a support body, and a protruding member. The limiting device is provided with a groove, and the protruding member is engaged in the groove. The limiting device can automatically limit the rotation of the drive shaft, to avoid damaging to the sensing device, thereby facilitating maintenance and installation of the valve.