The control unit consists of 3-position valve (response time of 0.3 seconds; code 453714S66JT), proportional control valve (response time of 7 seconds; code 4537740CCST), and the drain manifold to 1.5 bar. All valves are three-wired.
The solenoid valve with connection diameter 1", capable to withstand pressures of up to 12 atmospheres. It is a three-wire, but is compatible with the two-wire controls. The response time is 0.8 seconds. Power Supply: 12V (3A).