PARKER Proportional pilot valve TEA080EW09B2NLWJ21 TEA100EW09B2NLWJ Proportional valve directional control valve.

Accumulator discharge valves are preferably used in hydraulic systems where high volume flow rates are discharged from hydraulic accumulators over a short operating period (in the range of milliseconds).Typical applications are, for example, injection moldingand die casting machines as well as pressing machinesof all types.Basically the function of an accumulator discharge valvecorresponds to the function of a TDA throttle valve. Inaddition, however, a directional valve is integrated in thepilot circuit so that the safety regulations for the abovetypes of machines can be met.The directional valve assumes a safety function. Whenthe solenoid is deenergized and the spring is in the finalposition, pilot pressure acts from X onto the control piston in such a way that the piston is pressed into lowerfinal position and, the main poppet is closed in a positiveseat position. As a result no fluid flows from B to A orfrom the reservoir system to the machine.