Throttle Valves - Finotek

A throttle valve is the most commonly used in various filed, even in our kitchen, for example. The working principle of home faucet is the simple throttle valve, but the difference is hydraulic oil as media and high pressure in industrial field in stead of water in home. The throttle valve is throttling the fluid flow, there are many different structures designed to throttle and it is better to choose the correct one for some certain working condition. –finotek.com

Throttle valve is the one of the most simple and widely used as flow control valve, it is often equipped with pressure relief vale to compose a variety of throttle speed adjustment hydraulic circuit or system for fixed position pump oil supplying. According to different ways of manipulating the throttle valves, this valve can be divided into general manually adjustable throttle valve, cam -operated mechanical moving response throttle vale and other different throttling forms. The throttle valve is often installed with a one way check valve to become one way throttle check valve, there are threaded type and modular type (Including sandwich type) as per the way of connection.

General Working Principle of Throttle Valve:
The picture below is the axial orifice type throttle valve. The inlet port and outlet port P and T are drilled on the valve house, there is a axial triangle throttle orifice hole is created on the top of valve poppet (part no.: 3), the fluid flows into P oil ports and flows out from T oil port through triangle throttle orifice hole to actuators or to oil tank. By regulating the adjustable knob to move the valve poppet position axially, which is be able to achieve fluid flow rate adjustment by adjusting cross-sectional area of throttle port.

                                                    1- Adjustable knob; 2- Pushing rod; 3- Valve Poppet; 4- Spring