EARL - Model Type 167 - 172 -Air Flow Switches

Type 167, the units are mounted by a flanged boss (provided by the installer) either to horizontal pipes or sideways to vertical square channel. Flow direction upwards only with special flange.

Type 172, the units are mounted by a flanged boss (provided by the installer) either to horizontal pipes or sideways to vertical pipes with direction of flow upwards only. A special model with balance weight for direction of flow downwards is available (type 172 only).

When the medium enters in the direction of flow indicated by the arrow it moves the vane in the direction of flow. A permanent magnet is situated at the vane and operates the switch contact. The set point is not adjustable.

• The bearing used make the units suitable for use with media containing dust particles.
• Sensitive control for set points from 0.6 m/s.
• Suitable for high pressures up to PN 160. (type 172).
• Explosionproof models available to several standards( type 172).
• For high flow velocities or larger line sizes the units are equipped with a stop for the vane.
• Special models available for temperatures up to 250 °C.
• Long-term continuity of spares availability.

• Flow control in chemical processes.
• Control of exhaust gas in conventional and nuclear power stations.
• Control of undesired back-flow in compressed air installations.
• Flow control in gas supply networks.
• Control of feed and exhaust air in mines.
• Ventilation control in machines or enclosed electrical installations.
• Exhaust gas control in heating installations.
• Suction-sided control of ventilators and compressors.