Selecting the right pneumatic valve for your machine requires three important factors to be considered: shifting force, balance and speed.
In order to ensure a reliable valve, high shifting forces are required. A valve with a higher shifting force will have a faster speed and better reliability.
In many applications it is critical that the same result is achieved each time a valve shifts. A filling machine must fill bottles to the same levels. A sorting machine must eject bad parts consistently. To do this, a valve’s output must be repeatable at all pressure levels. This is especially important when compensating for variations in pressure during normal plant operations. This attribute is achieved through a balanced design.
D-Seal technology results in minimum friction, while the solenoid is isolated from any contaminated air. The calibrated strokes result in extremely repeatable response times and flow. The short stroke gives high shifting forces when the valve is energised, resulting in speed and reliability. These characteristics enable the valves to optimise cycle time and significantly improve consistency.
MAC Valves is a specialist in air valve solutions for the filling industry, which meet all these requirements. Speed and repeatability, both critical filling parameters, are inherent benefits of the design. The company’s patent pending Bullet Valve technology represents a step change in air valve technology. It features a unique “lifting” solenoid where the valve maintains a balanced design and so is unaffected by fluctuations in air pressure. This is a signature feature of MAC valves.
The wiping action means that the valves are virtually unaffected by typically
contaminated air. Pneumatic Electric Control Systems trading as PECS as sole agents for MAC Valves in South Africa and provide high performance demonstration kits which prove the energize response time and repeatability of the valves. The Travelling Lab Demonstration (TLD) measures critical valve performance characteristics such as shifting forces, response time, speed, repeatability and flow.
The Proportional Lab Demonstration (PLD) function measures critical proportional regulation characteristics such as response time, accuracy, hysteresis, repeatability and flow. They come with an animated software package, which shows the inner workings of the various air valve designs.
This is a powerful educational tool for demonstrating how air valves function.