A one-way throttle valve is a valve that controls fluid flow by changing the throttle section or throttle length. Paralleling the throttle valve and the check valve can be combined into a one-way throttle valve. Throttle valve and one-way throttle valve is a simple flow control valve. In the hydraulic system of the metering pump, the throttle valve and the overflow valve cooperate to form three kinds of throttling speed control systems, that is, the throttling of the oil inlet throttle System, return throttle throttle control system and bypass throttle control system. The throttle valve does not have a negative flow feedback function and cannot compensate for the speed instability caused by the load change. Generally, it is only used for occasions where the load change is not large or the speed stability is not required to be high.

What is the difference between a one-way throttle valve and an ordinary throttle valve?

Difference between one-way throttle valve and common throttle valve in structure

From the structural point of view, it does not seem that there is no difference. Ordinary throttle valve can enter the P2 port through the triangular groove (throttling port) on the valve core when the oil enters from the P1 port, and can pass the valve when the oil enters from the P2 port. The pressure is applied to the right end of the core, allowing the spool to move and flow directly into port P1, as is the one-way throttle. The difference is whether the spring has a different degree of hardness or hardness. The one-way throttle valve is a soft spring and the ordinary throttle valve is a hard spring.

Difference between one-way throttle valve and ordinary throttle valve in function

The difference between the check valve and the throttle valve is in the role of the check valve. Ordinary throttle valve When oil enters from port P1, it can flow into port P2 through the triangular groove (throttling port) on the valve plug. When the oil enters port P2, pressure can be applied to the right side of the valve plug. The core moves directly into port P1. The one-way throttle valve has the existence of a one-way valve. When the oil enters P1 port from port P2, the oil flows directly through the one-way valve (rare part passes through the throttling valve) due to the resistance of the throttling valve. P1 mouth, this time the throttle valve will not play any role, and this is the basic difference between the two! It can also be understood as the ordinary one-way valve bidirectional throttle throttling effect, and one-way throttle valve only one single The speed regulation effect.