Disc valve motors use a flat rotating disc for the porting instead of a spool or commutator. The disc is pressure-balanced, so it seals better as pressure rises rather than worse. That is what lets this range hold high pressure and high torque for long, continuous duty cycles - and why it is what you fit when a lighter motor keeps failing.

What these suit

Drilling and auger heads, large wheel and track drives, forestry and mining attachments, mulchers and mowers, cable and hose reels, heavy conveyors and mixers, and any wheel drive carrying real vehicle weight. If the machine earns money by running all day at pressure, this is the range.

Choosing one

Displacement sets speed and torque at your available flow - and on this range the big displacements pull very high torque, so check your shaft and coupling are rated for it. Then mount, then shaft (this range offers large keyed, splined and tapered shafts as well as wheel flanges), then seal and port options. High-pressure seal versions are worth specifying wherever the motor works near relief pressure.

Bearings and shaft loads

The disc valve frames use heavier bearing packs than the gerotor and geroler ranges, which is what makes them suitable for wheel drives and other applications where the shaft carries the load directly. The specification sheet on each listing gives the permissible radial load.

What these replace

Interchanges with Danfoss OMS, OMT, OMV and OMEW, Eaton and Char-Lynn 2000, 4000 and 6000 Series, Parker TB, TC, TE, TF and TG, White RE and RS, and the Rexroth and Bosch equivalents. Every listing carries its own cross-reference table and part number breakdown.