The progressive start valves are a pneumatic component that allows air to enter the circuit gradually, thus avoiding forced openings of excessive pressure. A sophisticated internal valve system allows two separate stages of operation. During the first stage, an amount of air leaves the soft-start valve that can be regulated by means of a pin.
The second stage is started when the downstream pressure again reaches 40 to 60% of the upstream pressure, during which the full port defect is reached. When the mechanism is deactivated, the air flow is cut off and the downstream circuit is relieved. The soft start valve is especially useful in machines where it is important to prevent the actuators or peripherals from moving quickly and uncontrollably, or where, for safety reasons, the air intake must be gentle and gradual.
However, if there is a significant leak in the downstream system, it may never be possible to achieve the pressure needed to fully open the valve. In the event that it is necessary to quickly bleed the descent circuit, it is enough to intervene on the control valve, which interrupts the air flow in the duct, causing the valve to close and the descent circuit to bleed.
In this way, the soft starter performs the double function of positioning the actuators, eliminating the risk of sudden kickbacks and safety valves by quickly unloading, using the remote control, the circuit served. To set the pressure setting time, the built-in flow regulator is used.
The pressures supported by the progressive start valve are the industry standard 10 bar, and the minimum 3 bar. We can have flow rates from 900 l/min to 4800 l7 min. Progressive start valves are used in all types of industry where the safety of any device or machine wants to be guaranteed by very sudden cylinder movements, which can cause a lot of damage.
Pneumatic soft start valves are safe, they do not produce excessive heat. The compressed air used to move the pneumatic cylinders does not generate water hammer, which reduces breakdowns or damage to the equipment.
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