The pneumatic proportional valve controls the outlet pressure in proportion to an electrical command input signal. It comprises a complete closed loop servo system in a compact mono block assembly with proportional solenoid valve, electronic regulatior and internal pressure transducer. The valve works as a 3-port/2-way valve with proportional magnet. The digital control system offers advantages at installation and commissioning for adapting the valve to special applications. The regulator can be set and optimised using a PC, RS232 adapter and software. Data record can be saved and used for further valves. The valve has no constant bleed. At absence of input signal or supply voltage the valve exhausts.
Software:
Display: signal, outlet pressure, parameter, pressure switch signal etc.
Scope_function: view setpoint, outlet pressure, internal signals from PID control
Parameters: command signal, zero point, overload threshold, ramp
Valve_diagnosis: parameters factory set or customised, optimization of the valve
Technical features
Command signal 0-10 V, 0-20 mA, 4-20 mA
• Output signal 0-10 V, 0-20 mA, 4-20 mA
• Adjustment zero point, range
• Linearity / Hysteresis ± 0.5% FS
• Response sensitivity < 0.5% v.FS
• Repeatability < 0.5% FS
• Regulating time < 1 s
• Rated input 12 / 22 / 30 / 44 W
• Relief capacity full nominal size