The MFS-05 dp is Filtration Group's microprocessor-controlled differential pressure regulator for industrial filter installations — cartridge filters, baghouses, cyclone after-filters, and central dust collection systems. It addresses the core inefficiency of timer-based filter cleaning: fixed-interval pulsing wastes compressed air when filters are clean, yet may under-clean when dust loading is high. By measuring the actual pressure drop across the filter elements (0–40 mbar range) and triggering cleaning pulses only when the dp exceeds a configurable upper switching threshold, the MFS-05 aligns compressed air consumption with actual filter loading conditions.

How do the three operating modes differ and when should each be used?

In all modes, a configurable alarm threshold (default 18 mbar) triggers the fault relay — signaling that filter elements need replacement, the cleaning system is malfunctioning, or the dust discharge path is blocked.

How does the MFS-05 handle combustible dust environments?

The controller carries an ATEX Ex II 3D T60°C rating for Zone 22 — areas where combustible dust clouds are unlikely during normal operation but may occasionally form. The IP65 ABS enclosure is dust-tight, and the included pressure measurement set provides a membrane filter at the raw-gas sensing port to prevent dust ingress into the pneumatic measurement circuit. The fail-safe relay is wired as normally-closed so that a power failure or controller fault immediately signals "fault" to the supervisory system — critical in ATEX applications where undetected controller failure could lead to filter blinding and unsafe pressure buildup.

What does the "RELAIS VP" designation mean in the part number?

"RELAIS" indicates the relay-output version (as opposed to a transistor-output variant), providing galvanically isolated volt-free contacts for the operation/fault and cleaning indication outputs. "VP" stands for the valve pulse output configuration — the controller drives 24 VDC solenoid valves directly at up to 1 A per pulse (≤1 second) or 0.5 A continuous. The MFS-05 is also available in an AC 230 V version (order number 76341838) for installations without a DC control power supply.