Falk Fluid Couplings - Transmission Products

Economical soft starts, with smooth acceleration

Shock- load protection

Type HF25 Disc Coupling Mount

From underground & overland belt conveyors to crusher and mixing applications, equipment professionals are constantly seeking better technology to protect critical production systems against the effects of damaging shock loads. And when it comes to eliminating sudden/ jarring starts, or preventing system failure/ deterioration due to overloads, nothing outperforms the system- saving capability of Falk True Torque fluid couplings.

Unmatched, cushioned soft start flexibility, at an economical price point.
Smooth acceleration.
Mechanical overload protection.
NEW sizes 2760HF & 2870HF offer higher capacity at higher speeds.
Increased starting torque available from standard NEMA B motors
with a fluid coupling. This is a benefit not offered by electronic soft start solutions.

Providing the softest, smoothest start will maximize the life of your system components.

As the smart alternative to expensive & complicated electronic solutions, Falk True Torque™ fluid couplings allow precise adjustment of startup characteristics in the field, simply by changing the fluid fill level via the easy access fill & drain holes.

NEW Longer starting profiles and softer starts.
For Sizes 1420HF & larger, adjustable metering orifices regulate the passage of fluid from the delay fill chamber into the working circuit, further softening the start.
For sophisticated belt conveyors, consider Type HFDD. The extended delay fill chamber permits initial start factor as low as 40% of the full load torque, dramatically reducing shock & stretch to the belt at startup.

Use of the extended delay fill chamber (HFDD) is recommended for conveyors subjected to unloaded starts, those with concave sections, those with low inertia, or those with any combination of these conditions. Modest fill in the working circuit at startup minimizes belt liftoff, and assures unloaded & low inertia conveyors are not rapidly accelerated. Protection – regardless of load condition.

Torque applied to a belt conveyor starts at zero (point C) and gradually increases in magnitude as the coupling impeller accelerates to point D. When the output torque of the fluid coupling exceeds the breakaway starting torque of the belt conveyor (point D), the conveyor gradually & smoothly accelerates to full speed.

Prevent jamming overloads that can cut short the life of your system.

True Torque™ fluid couplings safeguard your system against mechanical overload. Simple, straightforward protection when instantaneous jams are encountered.

Two fusible plugs per coupling are a standard feature, and prevent damage to the driven equipment and the motor.
The proximity sensor cutout switch accessory, an extra charge option, prevents fluid discharge, and provides ability to reset cutouts in case of frequent overloads.
Another optional accessory, the easily replaceable thermal trip plug, is used in conjunction with a trip switch, also preventing fluid discharge.

Increase the starting torque available for hard starting conditions.

Over-sizing of electric motors for the purpose of increased starting torque can be avoided with a properly selected fluid coupling. A fluid coupling allows the motor to accelerate independently to full speed, the driven load has been isolated by the fluid coupling. Once the motor is started, the fluid coupling gradually introduces the driven load. If the starting load is high, the breakdown torque (Point B) of the energized motor is now available for starting purposes.

Easily balance the load sharing between multiple drives.

Adjust the fill so each motor carries an equal burden.

Complete drive systems from Falk

But Rexnord’s capability isn’t limited to just selling a component, we sell drive systems incorporating the gear drives, couplings, backstops, brakes, guards & motors, all mounted on a bedplate, swing base or alignment free assembly. Plus, our ready availability keeps you producing… even in the most remote places on Earth.

Fluid Coupling Solutions to suit any need.

The gear coupling mounting arrangement (HF20) features economy, ready availability from stock components, and permits convenient drop-in/drop-out servicing.

Basic Types

The non-delay fill option (HFN/HFR) provides soft start, including a short delay (example: 5-10 seconds) in the acceleration of the load, and is a good choice when overload protection or increased starting torque is a primary requirement.

The delay fill option (HFD) provides a softer, more cushioned start, including longer delay (example: 10-20 seconds), ideal for heavily laden belt conveyors.

The extended delay fill option (HFDD) provides the softest, most cushioned start of empty, low inertia belt conveyors (example: 20-40 seconds).

Falk True Torque Fluid Couplings prevent shock loads from damaging your power transmission equipment. Whether it’s preventing sudden starts or system failures due to overloads, nothing protects against malfunctions quite like a Falk Fluid Coupling. For a deeper understanding of how this piece of equipment works, we’ve outlined the internal working of the coupling to illustrate a Falk product’s durability.

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