QCC took over the manufacture of the Bosch Rexroth Group MP15, MP18, MMP22 Valve assembly products and Service Kits using the original tooling, assembly and test procedures transferred to us from Bosch Rexroth the Original Equipment Manufacturers (OEM). These products are exact matches to the original equipment part numbers and are in production at QCC LLC.
QCC MP mobile stack type valves are load sensing pressure compensated valves. They control the volume, direction of oil flow and maintain a constant flow regardless of changing load pressures.
An advantage of QCC MP Valves is that the starting point for movement of the function always remains the same, i.e., a specified control spool position always has the same metering characteristics. This is accomplished by a compensating spool in each section.
While the main spool is in neutral, the primary shuttle and secondary shuttle are vented to tank. When the main spool is operated, the load pressure is directly via the primary shuttle to the spring end of the pressure compensator spool. The section compensator now moves to the open position. Dependent on the pressure drop between the section compensator and the control spool opening, a specific volume now flows to the function. The load signal also simultaneously communicates to the secondary shuttle and on to the system load sense compensating variable displacement pump.
Load sensing directional control applications include: Aerial Work Platforms, Telehandlers, Mini-Excavators, and Backhoe Loaders for OEMs such as Catelillar, Gradall, Agco, etc.
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