DINKONDA GLOBAL Power Plants Special AW Series 0.4-0.7MPa Single Acting Spring Reset Fork Type 462-48100Nm High Torque Pneumatic Actuator

DINKONDA GLOBAL Power Plants Special AW Series 0.4-0.7MPa Single Acting Spring Reset Fork Type 462-48100Nm High Torque Pneumatic Actuator

Product Overview

The AW series single acting spring reset pneumatic actuator is developed and manufactured by Zhejiang Baide Automation Instrument Co., Ltd. It belongs to the fork type high torque pneumatic drive device, which relies on compressed air to drive the fork mechanism to output torque. When the air is cut off, the built-in spring component automatically resets. It is the preferred product for driving large ball valves, butterfly valves, and plug valves. It is widely used in emergency shutdown conditions in the process industry, and can achieve safe valve return in case of air loss or fault, meeting safety interlock requirements.

Structural Composition

The main body of this actuator adopts a fork type transmission structure, mainly including a cylinder barrel, a fork transmission mechanism, a built-in spring assembly, an end cover, a manual operating mechanism, and an installation connecting flange; The supporting accessories can integrate air filter pressure reducing valve, solenoid valve, valve position feedback device (limit switch box), air source copper pipe joint, pressure gauge, etc. All components are modularized for easy disassembly and maintenance. The fork structure can amplify the output torque at both ends of the stroke, perfectly matching the torque variation characteristics of the valve opening and closing process.

Core Features

1. * * Single acting spring reset, safety interlock * *: During normal gas supply, the gas source pushes the piston to overcome the spring force and drive the valve action; Once the gas source is interrupted or malfunctions, the accumulated elastic force of the spring automatically drives the actuator to reset, achieving emergency closing or opening of the valve and adapting to the SIL safety cut-off circuit.

2. * * Fork type torque output, stable high torque output * *: Different from the gear rack structure, the fork mechanism amplifies the torque at the end position of the switch, adapting to the high torque demand of large valve opening and closing moments, and the output torque curve conforms to the actual load of the valve.

3. High structural strength and long service life: The cylinder body is made of cast steel material, with a blue anti-corrosion coating on the surface, which is wear-resistant and impact resistant; The spring is made of high-strength alloy spring steel, which has undergone pre compression fatigue testing and stable performance under repeated reset conditions; The internal sealing components are made of anti-aging rubber material, which has excellent air tightness.

4. * * Equipped with manual operating mechanism * *: Equipped with a side mounted manual operating handwheel, the valve can be manually opened and closed during periods of no gas source and debugging, making it convenient for on-site installation, debugging, and troubleshooting.

5. * * Flexible Attachment Integration * *: Standardized installation interfaces are reserved at the top, which can be directly assembled with solenoid valves, valve position feedback switches, positioners, and air source triplets. The layout of the gas pipeline is simple, and on-site explosion-proof accessories can be selected to adapt to explosion-proof areas.

6. Strong universality of installation: The output flange and connecting shaft comply with ISO standards, and the installation hole positions are standardized. They can be directly matched with large-diameter butterfly valves and ball valves of national and American standards, and the installation angle can be adjusted as needed.

Technical Parameters