Stainless steel gear meters

The KEM ZHM KL meters are used for measuring the flow of hydraulic oil in a range of flow rates between 0.005 to 1000l/m and fluids ranging in viscosity from 5 to 25,000mm²/s (cSt). Linearity is plus or minus 0.5 per cent of the actual value with a repeatability of ±0.1% The ZHM is designed to work at pressures of up to 630 bar at a maximum temperature of 180°C.

The robust ZHM KL gear meters are designed specifically for measuring lubricating and non-abrasive fluids such as oils and greases. Parts are manufactured exclusively of high-grade stainless steel, making them well suited for middle and high pressure media.

Gear flowmeters are positive displacement volumetric counters with an internal design similar to a gear pump. There are two gear wheels inside the flowmeter body which engage with minimum play in a closed measuring chamber between the gears and their housing. The revolutions per minute (rpm) of the gears are proportional to the instantaneous flowrate.

The fluid to be measured is forced through the meter chamber and turns the gears, which move freely in order not to break the flow. The rpm of the gears as the fluid passes through the chamber is picked up and measured using contactless sensors through the body wall.