Visual flow indicators stainless steel bosses

Features and applications

The indicator can be mounted in any position.

In case of mounting on rigid tubes, it is recommended to place the indicator perfectly aligned with the tubes.

The indicator operates with two-way liquid flows.

For rotating the propeller it is required a minimum fluid flow rate

Please contact us with your requirements.


Polypropylene based (PP) technopolymer, black colour, matte finish.

Axis and rotor propeller

Polypropylene based (PP) technopolymer, red colour.

Tubular window

Borosilicate glass, high-resistance, also suitable for use with glycol-based solutions.

Maximum visibility of the flow from all angles.

Tie rods

AISI 316L stainless steel.

Screws and nuts Zinc-plated steel.

Standard executions

Cylindrical gas threading according to UNI ISO 228/1 or conical gas NPT – ANSI-ASME B1-20.

  • HVF.: brass bosses and NBR synthetic rubber gasket.
  • HVF-SST: AISI 316 stainless steel bosses and packing ring in VITON®*.

Maximum continuous working temperature 100° C.


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