Design Features

JV flow and level indicators are designed to indicate the presence or clarity of liquid in a piping system or to indicate level in a tank. They offer a maximum viewing area with a full 360° visibility for dependable observation and inspection from a reasonable distance.

All JV indicators utilize a double wall construction. All inner walls are Pyrex for maximum corrosion resistance, and all outer walls are high impact acrylic which acts as an armored shield against external shocks O-ring seals are used on all JV indicators allowing them to seal at extremely low pressures as well as high pressures. In the wafer style flow indicators, O-ring seals are also supplied for both ends eliminating the need for flange gaskets.

All JV flow indicators are full ported, eliminating any possible flow resistance. They are available with an optional mechanical fluttering device to indicate the presence of flow that would otherwise be difficult to see.

Flow indicators and sight glasses in bronze

Bronze flow indicators are manufactured with double armour plate glass and a stainless steel vane to indicate flow of medium, where required the vane may be removed. Bronze sight glasses have a single window of armour plate glass. They are suitable for use following steam traps and in similar applications.

Flow indicators and sight glasses in stainless steel

JV fabricated and semi-fabricated stainless steel flow indicators and sight glasses lend themselves to arrangements which can be varied to suit any application with regard to end-fitting configuration. Fabrication and design available to required standards.

Flow indicators and sight glasses in carbon steel

Fabricated and semi-fabricated stainless steel flow indicators and sight glasses lend themselves to arrangements which can be varied to suit any application with regard to end-fitting configuration. Fabrication and design available to required standards.

Flow indicators and sight glasses in cast iron

Cast iron flow indicators and sight glasses are manufactured with double armour plated glass and a stainless steel hinged vane which indicates whether or not a fluid is in motion.