UB 50 A4 Technical description

The pressure switch UB 50 A4 is an adjustable pressure switch as per EN 1854 for automatic burner controls. Suitable for switching a circuit on, off or over on changes in actual pressure value relative to the set reference value. The reference value (switching point) is adjusted on a setting wheel provided with a scale.

Application

Pressure monitoring in firing, ventilation and air-conditioning systems. Suitable for air, flue and exhaust gases and other non-aggressive gases; not suitable for industrial combustion gases. Ideal for applications requiring high precision in the low-pressure range.

Approvals

EC type testing certificate as per:

• EC-Gas Appliances Regulation
• EC-Pressure Equipment Directive

Pressure switch class "S" as per EN 1854. Approvals in other important gasconsuming countries.

Functional description

Single-acting pressure switch in the overpressure range. The pressure acts via the diaphragm against the force of the setting spring on the microswitch. The pressure switch operates without auxiliary power.

Pressure switch

The control unit responds to pressure. If the set reference value (mbar) is exceeded or undershot, the circuit is switched on, off or over.