Directional control valves or directional valves are intended to direct the flow of oil to the cylinder or motor to achieve movement in the required direction, to start or stop the actuator, to accelerate it or slow it down.

They are distinguished into on-off-controlled valves, with rapid changeover from fully open to fully closed conditions, and into valves operated with continuous control signals, i.e. capable of continuously changing the fluid flow section and thus the instantaneous flow rate values.

A movable element is installed in the directional valve , which can be spool or slider, shutter or ball. The simplest distributor is the ball valve or cock that closes, opens and regulates the flow of oil.

The ball valve is the most common device used to shut off flow in hydraulic pipelines.

Its operation is based on a 90° rotation by a hand lever connected to a pin that controls a perforated ball. The valve allows the flow to be completely closed/opened, but also, to a certain extent, the flow rate can be controlled by adjusting the passage span.

The sealing of the fluid is ensured by the pressure that pushes the ball against the seal on the opposite side of the pressure.

 

APPLICATIONS

Due to their compactness and simple construction, one-piece directional control valves are the best choice in all applications where space, weight and cost are a concern. They are used in agricultural machinery, municipal machinery, construction machinery and lifting equipment.

 

CHARACTERISTICS

Simple and robust, the monoblock valves can be equipped with auxiliary pressure control valves and flow control valves. Direct hydraulic controls, cable controls, electro-proportional controls and joystick controls available. Parallel, Load Sensing, Tandem and Series Circuits.