Liquid Controls M Series User Manual

M & MA Series Meters
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This true rotary motion is transmitted through the packing gland, the face gear, the adjuster
drive shaft, and the adjuster to the register stack and counter. True rotary motion output
means consistent accuracy, since the register indication is in precise agreement with the actual
volume throughput at any given instant. At any position in the cycle, the meter body, the
blocking rotor, and at least one of the displacement rotors form a continuous capillary seal
between the unmetered upstream product and the metered downstream product.
Because the product is separated by the capillary seal, no metal-to-metal contact is required
within the metering element. This means no wear, and no wear means no increase in slippage,
which means no deterioration in accuracy.
Throughout the metering element, the mating surfaces are either flat surfaces or cylindrical
faces and sections that are accurately machined. These relatively simple machining
operations, plus the fact that there is no oscillating or reciprocating motion within the device,
permits extremely close and consistent tolerances within the LC meter.
The product flowing through the meter exerts a dynamic force that is at right angles to the
faces of the displacement rotors. The meter is designed so that the rotor shafts are always in
a horizontal plane. These two facts result in no axial thrust. Therefore, LC meters do not need
thrust washers or thrust bearings, and the rotors automatically seek the center of the stream
between the two bearing plates–eliminating wear between the ends of the rotors and the
bearing plates. Once again, no wear results means no metal fatigue and no friction.
Liquid Controls meters are made of a variety of materials to suit a variety of products.
Because of their no-wear design, capillary seals, and unique rotary metering, LC meters
provide unequalled accuracy, long operating life, and exceptional dependability.

Liquid Controls M Series Specifications

General

Temperature Range	-40°F to +160°F (-40°C to +71°C) standard, extended ranges available
Materials	stainless steel
Type	Positive displacement flow meter
Fluid Compatibility	fuels, oils, and chemicals
Sizes	6"
Output Options	Pulse