The exact difference between throttle valve and speed regulating valve lies in whether the speed regulating valve on the cylinder controls flow or speed. What effect does it have on cylinder work?

First question: The exact difference between throttle valve and speed regulating valve is:

The throttle valve controls and adjusts the cross-sectional area of the fluid flowing into and out of the valve body. When adjusting, the cross-sectional areas of the inlet and outlet are the same.

The speed regulating valve consists of a one-way valve and a throttle valve. When adjusting, the cross-sectional areas of the inlet and outlet are different, and the fluid is only controlled in one direction, that is, the gas entering the cylinder is uncontrolled and cannot be adjusted, while the gas discharged is controlled and can be adjusted.

The second question: Does the speed regulating valve on the cylinder control the flow or speed, and how does it affect the work of the cylinder?

It is important to understand and pay attention to that the hydraulic cylinder can generally control the amount of oil in and out through the throttle valve and adjust the speed (the oil will not expand to as much as needed). Different from the double-acting cylinder, it is inconvenient to adjust the speed by using the throttle valve (gas will surge when entering the cylinder, and if there is no piston damping, the rapid propulsion will be out of control, or the speed can be adjusted according to the load), and the cylinder speed and propulsion force cannot be adjusted and controlled ideally. It is necessary to control the other cavity (the gas end to be discharged) of the cylinder to throttle without adjusting the flow and pressure during air intake, so as to form back pressure damping in the cavity and stabilize the propulsion speed and thrust of the cylinder, so as to make it slowly or quickly deflate and effectively stabilize the movement speed and thrust of the cylinder. When switching to air intake, it will not be throttled, but will be controlled by the speed regulating valve when the air cavity at the other end is emptied. This is the speed regulating valve composed of one-way valve and throttle valve mentioned above.

Remember! When you adjust the speed of the exhaust side, adjust the speed valve of the exhaust side, while the intake side is not adjustable, and vice versa.

In addition, the single-acting cylinder (one port) can be adjusted by throttle valve (it has back pressure spring and load damping, etc.). However, in order to achieve high demand and stable speed, speed control valves must be used.