Operator type 300

The Type 300 operator is a "compact" series valve actuator with rack and pinion. It has been designed for motorizing various valves including conical, cylindrical, lubricated or non-lubricated spherical valves, as well as butterfly and gate valves.

The mechanism's capability and the adaptation of cylinders based on the driving fluid pressure allow it to generate a torque of 1000 Nm. In standard construction, it rotates 90° plus adjustment, but special elements are provided to extend this rotation to continuous 180° or two separate 90° movements.

Definitions

There are several models of this type of operator, each defined by a four-number symbol:

For example :

Characteristics

This servo-motor is comprised of a sealed housing containing motion transformation mechanisms such as the rack, sector, bearings, and tooth reaction stops. The housing accommodates the cylinder on one of its flanges via an adaptation flange.

The piston of the cylinder is connected to the rack by a threaded connection to adjust the stroke during assembly. Two adjustable mechanical stops are provided on the cylinder to position the rotation according to the device being motorized. The drive and fixation are located at the lower part of the assembly, while the position indicator is at the upper part.

Manual Emergency Operation

It is executed by a reversible screw always engaged with the mechanism, but the manual operating wheel disengages automatically. It is mounted on the other flange of the housing in alignment with the rack. The operator can be supplied without the emergency control.

Technical Specifications

The housing is made of high-quality cast steel. The mechanisms and parts of the cylinder are made of carbon, manganese, and silicon steel; external moving parts are made of stainless steel; self-lubricating bronze bearings and pads; guides are made of PTFE with MOS2. All molded seals are made of Perbunan, and cut seals are made of rubberized asbestos in the standard version.

Despite developing high torque, Type 300 operator exerts no radial force on the drive shaft. The driving fluid can be low-pressure air or gas (7 bar) or high-pressure (320 bar) without expansion, or hydraulic fluid. The chemical characteristics of the driving fluid dictate the material of seals and the treatment of internal components.

On Request: Equipment for signaling contacts and control devices. Installation of devices for automatic valve closure based on specific parameters.

Equipment and Special Models

The Type 300 operator can be supplied, upon request, with control or feedback accessories. The minimum passage section for these accessories should be Ø 15mm. Electrical or pneumatic signaling contacts are also available upon request (refer to Type 620 manual).

High-Pressure Version :

By adapting special cylinders, the Type 300 operator can utilize all gaseous or hydraulic fluids up to 120 bar pressure. Refer to the accompanying table. (Request specific plans or manuals.)

Note : like all other types in the "SUPER" series, Type 300 can be submerged after appropriate protection and specific modifications