What is the purpose of using quick-release valves in some valve control circuits (pneumatic circuits)?

It means that there is a requirement for quick opening or quick closing of the valve; specifically, it depends on whether the valve is of the air-open or air-close type.

Increase the displacement to boost the speed of cylinder retraction

A quick exhaust valve, as the name implies, is designed for rapid exhaust to ensure fast opening or closing of the valve.

Reply to 2# HadaZH: How does it work? All gas amplifiers have a gas signal, right? The quick exhaust valve is simply installed on the gas pipe, with an exhaust port on one side; I don’t see any signal there How does he achieve rapid exhaust?

The quick exhaust valve has three connections: one is the air inlet, usually marked as \"in\", which is connected to the air supply source, the output of a solenoid valve, or the output of a positioner; another is the air outlet, generally marked as \"out\", and it is connected to the cylinder of the actuator; the third is the exhaust port, usually marked as \"ext\", which leads to the atmosphere – a silencer is typically installed there to reduce noise. The working principle is as follows: when the pressure at the intake port is greater than that at the exhaust port, air is supplied to the cylinder. At this time, the intake port and the exhaust port are connected, while the exhaust port is blocked, allowing air to enter the cylinder and triggering the valve to move. When the pressure at the intake port is lower than that at the exhaust port, meaning the cylinder needs to discharge gas, the intake port is blocked while the exhaust port is connected to the discharge outlet; the gas in the cylinder is then released directly into the atmosphere through the quick-release valve, causing the actuator to move into position rapidly.

Installed to enable rapid opening and closing of the valve

It’s just a small attachment that speeds up the emission process

Reply to 5# Lai Erwa: 6L explained it very clearly~~

Its function is to allow rapid exhaust; the valve is required to carry out the opening or closing action corresponding to the signal within 3 seconds