The Titans of Flow: How the “Big Five” Defined the Screw-In Cartridge Valve Era

From their 1950 aerospace beginnings to today’s integrated packages, hydraulics have been made more efficient by the Screw-in Cartridge Valves. Today, the world market is being shaped by five hydraulics giants: Sun Hydraulics, Bosch Rexroth, Parker Hannifin, HydraForce, and Danfoss.

Sun Hydraulics remains the original “Floating Construction”, a patented valve that “floats” and prevents internal binding from installation torque. Sun is still the standard for high-flow Cartridge Valves and independence in a sea of acquisitions.

Bosch Rexroth and Parker Hannifin define dominance through innovation and consolidation. Rexroth is known for his “Compact Hydraulics” philosophy and Parker’s behemoth portfolio-  strengthened by the acquisition of Sterling and Waterman - both companies have the capability and innovation to support the world’s most extreme industrial environments that require high-flow Cartridge Valves. In 2022, Rexroth announced the acquisition of HydraForce, combining the world’s largest volume manufacturer with the global technology leader.

Danfoss became the new powerhouse after the acquisition of Eaton’s hydraulic business in 2020, retaining the famous Vickers lines. These five powerhouses have taken legacy hydraulics - large, heavy, clunky, and leaky hardware - and turned them into compact, integrated Cartridge Valves. As the industry continues to demand higher pressures and digital integration, these five giants will continue to be the builders of the world’s most complex fluid power systems.

From these hydraulic giants, Difon offers extensive customization options for your Cartridge Valves to create the perfect hydraulic solution. Our micron-first tolerances and best-in-class quality control to meet your project needs.