Pneumatic Electric Drives Vs
These 1/4 return control ball valves are more compact, lightweight and much cheaper than comparable balloon valves and segmented control valves offered by other companies. Flow-Tek control valves provide fast response times for control signals thanks to advanced digital performance control and the inherent strengths van bi điều khiển bằng khí nén of ball valves. These valves exceed class VI by offering airtight closure to zero punctures. Other features include superior range and repeatability, high flow capacity, ability to run on solid and fibrous liquids, ease of maintenance and exceptional interface with PLC and computer command signals.
When someone says “pneumatic ball valve”, they mean a regular ball valve with a pneumatic drive. Valves built for automation usually have an industry standard 4-bolt mounting pad on which the actuator mounts. A 3- or 4-way multi-track valve provides maximum control of liquid bypass and / or mixing applications for oil and gas producers.
The detectors and electric ball valves that respond to those sensors allow a machine to self-regulate and adapt to these conditions before they become catastrophic. When used correctly, a powered ball valve can reduce production loss, repair time and injury by responding quickly if necessary. All these benefits should convince companies and industries to include a powered ball valve in their design. Flow-Tek’s characterized balls provide predictable and accurate control of downstream flow rates.
By separating the actuator’s electrical power source, the actuator components are easier to maintain and replacement costs can be minimized. In addition, electric drives produce less noise than other types, making electric models very useful in noise-sensitive environments. Pneumatic drives use air pressure as the primary energy source to produce motion, which in turn controls the valve. The most common type of pneumatic drive, the diaphragm drive, pumps air into a hollow housing where the resulting pressure operates on a flexible rubber diaphragm to divert it from its original position. An actuator automatically re-plays a driven ball valve so that different positions can be taken.
They have a direct connection to the valve stem and can rotate it a quarter turn. Actuators or handles are mounted on the valve handle and act as controls to open or close the valve. With the right power source for your project, you can reduce maintenance costs, increase uptime and maximize safety. These mechanical devices can be driven in a variety of ways, including electrical, pneumatic and hydraulic. Each option offers different advantages and disadvantages making it suitable for different applications.
A company can determine which type of electric ball valve is most suitable for its operation. A pneumatically driven ball valve is powered by gas pressure, while a hydraulically driven ball valve uses hydraulic fluid pressure. Various power supplies are available for operating an electric ball valve. Pneumatic, hydraulic and electric drives are the available types of energy sources. A company needs to analyze which type of electric ball valve best suits its needs.
In the case of Gemini Valve electrically powered ball valves, this pair rotates an axis connected to the ball valve stem. An external SPDT switch or device with the electrically powered ball valve is used to control the position, both open and closed. A powered ball valve is very reliable and can completely prevent the current from entering a specific tube or area. These valves are easy to maintain and can be adapted to the needs of a specific factory. For example, you can order a ball valve with a specific size for factory pipes.
Error-resistant retouroptions are available everywhere for pneumatic drives. However, this function is not so easy to implement with electric actuators. Pneumatic drives with double action are up to 70% larger than electric drives. Gemini Valve now certainly offers the first pneumatic actuator with double action. This combines the durability of an actuator with two effects with the failsafe system normally only offered by spring-for-spring models. The drive works in a two-effect configuration until airflow or pressure is lost and the springs are automatically activated to return the valve to normal.
The fast ½ second cycle times offered by pneumatic drives can be detrimental to high flow applications due to the water hammer caused by the abrupt media stop when cycling over the valve. If no air supply is available to power pneumatic devices, electric drives are used. The dual action uses air to move internal pistons in two directions, turning the 90 ° actuator pinion.
In a pneumatically operated dual-action ball valve or a typical electrically powered ball valve, the valve will fail due to loss of its performance signal and will not automatically return to a designated position. This would apply to a two-way version, a two-way ball valve or a multi-port arrangement. While pneumatic drives with spring return and fail-safe electric drives with springs or battery packs meet this need, they are often heavier, larger and certainly more expensive than fail-safe versions. The nature of this distinction often makes magnetic valves a cheaper option in many fail-safe applications. V-Ball valves offer several advantages compared to large and expensive balloon valves for flow control applications.