In EV7 electric valves the force generated by a magnetic field fed by an electric coil is transformed into a mechanical action able to command the opening or closing of the valve, allowing or interrupting the flow passage. The EV7 valves are available in NC configuration (valve closed in absence of power supply) or NO (valve open in absence of power supply). Typical application of these valves is the unloading function: a normally open valve discharges the pumpf flow, preventing movement of the actuators until an electrical impulse closes the passage to tank, making the flow available for use. For the NC version an emergency command is also available for manual opening of the valve in the event of an interruption of the electrical signal. The presence of a poppet and a sealing seat allows the EV7 valves to be used as check valves able to support a load thanks to the absence of leakage when closed. A typical example of application in this sense is the block in position and the consent to the descent of a single-acting cylinder. The EV7 valves are single-sealed; the block valve function is only possible in one direction while in the opposite direction the flow passage is free. The maximum working pressure for EV7 electric valves is 350 bar (5075 PSI) , while its use is recommended with flow rates up to 40 l/min. (10,5 USgpm). The EV7 are cartridge valves with SAE8 size and can be installed in a cavity made according to the SAE08/2 standard with 3/4-16 UNF thread. On request the valve bodies are available for the in-line installation of the cartridges. For the electric actuation of the EV7 valves are also available 12V and 24V coils, in direct and alternating current, and the relative connectors.