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Element construction and operation is illustrated in the figure. Pressurizing the unit compresses the brake springs and withdraws the water jackets from the brake discs. Heat generated at the friction interfaces is quickly transferred to the circulating coolant.

Element sizes are indicated by the number of friction discs and the disc diameter in inches. For instance, size 224WCS has two friction discs 24 inches in diameter.

Specifications

Size	124WCS
Dimension D₂₄	1.06 in 27 mm
Dimension D₂₅	1.75 in 44 mm
Dimension D₂₉	0.250 in 6.4 mm
Dimension D₄₆	1.38 in 35 mm
Dimension D₄₃	4.13 in 105 mm
Dimension G¹	29.998 in 761.9 mm
Dimension H₁₀	12.75 in 324 mm
Dimension H₁₃	24.375 in 619.1 mm
Dimension J₁	11.50 in 292 mm
Dimension J₂	30.89 in 785 mm
Inlet Port Thread Size O₂²	1/2/2014
Inlet Bolt Circle Diameter	18.50 in 470 mm
Minimum Bore Range³	3.50 in 89 mm
Maximum Bore Range⁴	7.50 in 191 mm
Dimension D₁	3.50 in 310 mm
Dimension D	12.02 in 305 mm
Dimension D₂	11.04 in 282 mm
Number of Coolant Ports O⁵	4
Coolant Port Thread Size	3/4 SAE ORB
Gear Port Number	411673
Torque Rating	82000 lb·in 9258 Nm
Release Pressure	80 psi 5.5 bar
Thermal Rating⁶	270 hp 201.3 kW
Water Flow Rate⁷	27 gpm 102.2 dm³/min
Housing Inertia	622 lb·ft² 26.21 kg·m²
Disc Gear Weight	1576.2
Disc Gear Inertia	3.7398694
Maximum Slip Speed⁸	715 rpm
Maximum Free Wheeling Speed⁹	1200
Housing Weight	458 lb 208 kg
Water Volume	1602.63
Manufacturer	Eaton-Airflex
Actuation	Spring Applied, Air Release
Where Used	Logging Equipment Marine Mooring Systems Drilling rigs
Features	Unique friction couple. A specially formulated friction material, interfacing with a copper alloy surface, eliminates the stick-slip characteristic associated with ordinary frictional devices. Rapid heat dissipation. The copper interface conducts heat rapidly to the circulating coolant. Open or closed loop coolant systems. The element works equally well with open or closed loop circulating systems. On mobile equipment, the engine’s cooling system can be tapped to provide coolant to the element. Optional corrosion protection For marine environment applications, protective coatings are available to minimize corrosion.

¹ Tolerance Sizes 8WCS thru 24 WCS +0.000/0.003 (+0.00/-0.08) 36WCS +0.000/-0.005 (+0.00/-0.13)
² American National Pipe Thread.
³ Maximum bore sizes are based on flat keys, allow able gear hub stresses and torque ratings with a full complement of springs.
⁴ Maximum bore sizes are based on flat keys, allow able gear hub stresses and torque ratings with a full complement of springs.
⁵ American National Pipe Thread.
⁶ Based upon a 70 ºF (21 ºC) fresh water inlet temperature and a 50 ºF (28 ºC) temperature rise between inlet and outlet. See cooling requirements.
⁷ To insure proper cooling, inlet port must be located at the six o’clock position. Maximum allowable inlet pressure is 45 psi (3.1 bar).
⁸ Based upon a continuous slip velocity of 4500 fpm (22.9 mps).
⁹ Maximum freewheeling velocity is 7500 fpm (38.1 mps)