The pneumatic pressure control stages monitor the preset limit values. As soon as outlet pressure gets close to these limits during operation, the pneumatic pressure control stages take over and keep the pressure constant. The transition from electronic control to pneumatic control is done automatically and is operated smoothly in both directions.
The following operation modes may be realized between the two pressure limits:
Remote setpoint adjustment
Flow control, optimizing efficient gas supply
Pressure control
Meter protection by means of actual flow limitation
According to defined pressure curves throughout a day or week
To improve regulating accuracy and stability due to electronic PI or PID control
Other features include:
CE registration according to PED in combination with HON gas pressure regulators
According to DIN EN 334, the pilot is an integral component of this device
Max. admissible pressure PS: 100 bar
Max. inlet pressure pu max: up to 100 bar
Pilot HON 658-EP consists of functional modules on a common base plate:
1st stage: Automatic load-limiting stage
2nd stage: Control stage controlling the lower outlet pressure limit pd min
3rd stage: Control stage controlling the upper outlet pressure limit pd max
4th stage: Electro-pneumatic loading pressure stage converting electrical signals into pneumatic signals
All mechanical components of this device are without potential ignition sources and/ or hot faces. They are not subject to ATEX 95 (94/9/EC). All electronic accessories, on the other hand, meet ATEX requirements.
