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Dosch Messapparate GmbH
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  5. EARL - Model Type 107 - 107hv - Flow ...

EARL - Model Type 107 - 107hv -Flow Switches

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When the medium enters in the direction of flow indicated by the arrow it moves the pendulum with target disc and weight against the force of the weight, in the direction of flow A permanent magnet is situated at the upper end of the lever which operates either one or two switch contacts, these are located adjacent to the system tube. The set point is fixed. For adjustable set points see type 107hve.

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Series 107hv with spring supported pendulum
Similar in principle to the 107 above but utilising a spring in place of a weight as the opposing force of the flow. This allows higher set points to be achieved, and by altering the spring tension the adjustment of the set point.

  • Works on highly reliable pendulum principle.
  • Resistant to wear and tear.
  • Suitable for use with media containing impurities.
  • Various explosionproof ratings available.
  • Materials for aggressive media.
  • Low pressure loss {Type 107vS).
  • Models available for use in maritime and humid tropical climates.
  • Simple installation and connection.

Guards against pumps running dry, monitors lubricating oil-, cooling water-; cooling air- and hydraulic-circulation systems as well as the circulation of cooling agents in refrigeration plants. Boiler feed water control, burst pipe control; overflow control; flow control on steam generating boilers and heat exchangers. Control of the direction of flow in water supply net works, fire alarm in offshore-sprinkler systems; minimum gas flow control in the steel producing industry; record of pipe breakage.

Type 107v
As inline unit DN 15 to DN 32 with T-piece and as online units from DN 40 to DN 1000 with flanged connection DN .... PN .... according to DIN and ANSI. One S.P.D.T. magentic contact.

Set point fixed according to customers requirements. Set points see general technical data.

Type 107m
Same as type 107v but with micro switch. Available with flange from DN 40.

Type 107ind
Same as type 107v but with inductive switch according to Namur. Available with flange from DN 40