Uses & Applications Of Actuator Valves In The Industry
The use of actuators is highly related to the operation and service of valves within a certain industrial process. Below is shown a classification according to the type of service and key features of COVNA Valve products, specifically for pneumatic and electric actuators
A normal process service consists of routine operations carried out in order to produce a specific product. In this case, the operation of any type of actuator (pneumatic or electrical) can work properly according to the needs of the process. The pneumatic and electric actuators of COVNA Valves are characterized by having actuator bodies designed and manufactured according to different requirements. Materials such as aluminum alloy are used for production under international standards. Additionally, treatments based on hard anodic oxidation and coated by polyester powder are applied for corrosion protection. In the case of pneumatic actuators, COVNA valves actuators have a series of mechanisms capable of operating with high reliability; an example of this are the high-pressure and integrative pinions, twin rack pistons configured under a symmetrical assembly of long cycle life and fast operation. For electrical actuators – likewise has high reliability and precision in operation – the COVNA Valves electrical actuators incorporates safety factors such as the fully enclosed of motors in cage type, high sealing performance and its self-locking with a accurate turbo-worm structure can output large torques with high efficiency and little noise.
Valves are required to be operable for a specified number of operations in order to ensure the safety of the process in the event of loss of the main actuator fluid medium. In many cases, pneumatic actuators are used. Its operating condition in failure mode allows it to operate more safely.
Actuators on valves identified as “critical service” shall have a reliable supply of the actuator fluid as well as a correct selection of manufacturing materials. The pneumatic actuators of COVNA Valve show high performance in each of its parts, as is the case of preloaded coated springs, which are made of a high-quality material to resist corrosion and longer life.
- Emergency process service
Valves installed at strategic locations to isolate/shutdown equipment or depressurize, remove or displace flammable/toxic environment contaminating material inventory of process lines/equipment.
On items classified as emergency process service the actuator shall have an additional set of actuating pushbuttons and position indicating lights located at least 10 meters from the valve and operable at grade level. The actuators and power/instrument leads on Emergency Classified valves shall be fireproofed. For these types of services, the actuators generally used are the pneumatic types.
The pneumatic actuators of COVNA Valve have been designed, manufactured, and tested using the latest technology, materials, and innovation, providing excellent service in various environments.
For emergency services, the actuators must be properly specified according to the operational requirements and the corresponding risk studies.