Proportional Flow Control Valve Symbol

While the design of proportional directional valves may vary from one manufacturer to another they all essentially perform the same function.

Proportional flow control valve symbol.

Pneumatic circuit valve symbols. Control the direction and. Symbol for spring or rest position of valve. Direct solenoid operated proportional throttle valve with lvdt feedback parallel flow path module and pressure compensating hydrostat module.

Proportion air products are recognized globally for precise control in a variety of applications and markets learn more. A direction control valve is a vital component in a hydraulic system. Simplified diagram illustrating the components fluid flow path and fluid pressures within a pressure compensated flow control valve. Most valve symbols have three parts see.

Proportional directional control valve electro hydraulic servo valve. Symbol for pressure inlet port of valve. A family of graphic symbols has been developed to represent fluid power components and systems on schematic drawings. The desired flow rate is set on the variable orifice by adjusting the pass through area of the orifice.

Of the valve flow control valves throttle valve adjustable output flow. Symbols show the methods of actuation the number of positions the flow paths and the number of ports. Symbol for 3. In the united states the american national standards institute ansi is responsible for symbol information.

The spring pushes from the side that is drawn on and will return the valve back to its failsafe position. When using valves that switch pressure lines without a direct low pressure return line connection it is important to make sure that the valves. Infinitely variable proportional valves flow control valves continued. The bottom symbol shows a hydraulically operated valve but in this case flow can only pass in one direction because the spring chamber is connected to the low pressure return line connection.

Therefore direction control valves can be designated by number of ports and number of positions and are selected based on the application. Hydraulic schematic symbols shut off valve simplified symbol accumulators filters water traps lubricators and. Here is a brief breakdown of how to read a symbol. Symbol for 2 port valve with two positions one position valve open with flow in both directions or valve closed with both ports blocked.

It controls the actuator s position and direction by controlling the fluid flow into the actuator. Click image to enlarge iso and ansi schematic symbols for pressure compensated flow control valves. Use the throttle valve shown in figure 14 10 to control flow in a bleed off or bypass circuit or to control flow to or from a conventional solenoid valve. The most common use is as a directional valve which will be covered in this article.