Chamber Metering Valves

Filling: The valve is in the initial position when the control pressure applied on the compressed-air connection. The valve needle in the control valve is in the upper position, thus closing the material outlet. The material access to the metering chamber is open. The material enters the control valve by means of the material pressure and lows into the metering chamber. Due to the contact surface of the piston, the piston executes an upward stroke. The metering chamber ills up automatically to the pre-deined volume. Metering: Material is metered when the compressed air connection of the valve is charged with compressed air. The valve needle executes a downward stroke, thus closing the material access to the metering chamber. The material outlet opens. The material pressure has an efect on the piston step, which enters the metering chamber and feeds the material to the material outlet. An accurate metering volume is discharged. The snuf back efect carried out during the reilling, prevents the material from dripping after metering is inished.