Danfoss MCV110 MCV111 Pressure Control Pilot Valve | MCV110A1017

Genlu Hydraulic manufactures the premium MCV110 and MCV111 Series (Type 3) pressure control pilot (PCP) valves, engineered specifically as high-precision electro-hydraulic controllers for Danfoss (formerly Sauer-Danfoss) closed-circuit hydrostatic transmissions. This series focuses on widely utilized engineering models such as the MCV110A, MCV110A1017, and the environment-protected MCV111B0302.

Serving as the intellectual “brain” for heavy-duty hydrostatic main pumps (e.g., Series 90 variable displacement pumps), the PCP valve continuously converts an electrical input signal into a hydraulic differential pressure, accurately dictating the swashplate angle and pump flow. Genlu strictly guarantees 100% Drop-in Interchangeability for all electrical coil parameters, hydraulic gain curves, and mechanical mounting footprints compared to original Danfoss parts. Through our mandatory 100% Simulation Load Testing, every single unit is verified for high-frequency current-to-pressure linearity, ensuring smooth, agile, and deadband-free propulsion control for your machinery.

Technical Specifications :

• Model Series: MCV110A (Standard version) / MCV111B (Variant with specific environmental connectors), conforming to the Type 3 footprint

• Control Principle: Electro-hydraulic proportional double flapper-nozzle mechanism

• Max Pilot Supply Pressure: 35 bar (500 psi)

• Max Output Differential Pressure ($\Delta P$): Up to approx. 15 bar (220 psi) between control ports at rated current

• Rated Input Current Range: Commonly 100 mA to 200 mA (dependent on 12V/24V coil and specific model code)

• Coil Resistance: Standard configurations include 22 $\Omega$ (for 12V systems) or 88 $\Omega$ (for 24V systems)

• Rated Hysteresis: Less than 3%

• Operating Temperature: -30°C to +104°C (-22°F to 219°F)

• Weight: Approx. 0.9 kg (2.0 lbs)

Key Technical Advantages

• High-Sensitivity Torque Motor: The internal electromagnetic core is constructed from high-permeability specialty alloys subjected to precision vacuum annealing. This dramatically reduces magnetic hysteresis, ensuring that the input current dictates output differential pressure ($\Delta P$) with supreme linearity for precision inching and speed control.

• Erosion-Resistant Flapper & Nozzle: The critical flapper and twin nozzles are machined from aerospace-grade alloy steel and cryogenically hardened beyond HRC 62. This guarantees exceptional resistance to high-velocity fluid erosion, preventing mechanical drift even after years of high-frequency vibration.

• Seamless Type 3 Standard Compatibility: The mounting interface and porting arrangements strictly adhere to Danfoss Type 3 specifications. This facilitates true Plug & Play replacement without any need to modify existing pipework or software calibrations, minimizing equipment downtime.

• All-Weather Encapsulation (IP67): Designed for brutal mobile environments exposed to mud, dust, and high-pressure washing, the solenoid coils and terminal leads (especially the AMP/Packard connections on the MCV111B) are fully vacuum-potted with epoxy resin. This achieves an IP67 protection rating, eliminating the risk of short circuits or moisture ingress.

Application Areas:

• Road Building & Compaction: Hydrostatic transmission swashplate regulation for road rollers, asphalt pavers, and cold milling machines.

• Agriculture & Forestry: Continuously variable transmission (CVT) drive systems for combine harvesters and feller bunchers.

• Concrete Machinery: Electronic proportional control for transit mixer drum drive pumps.

• Material Handling & Specialty Vehicles: Smooth acceleration and braking control for mining haul trucks, skid steer loaders, and boom lifts.

Expert Maintenance Tips:

• Mandatory Air Bleeding: Trapped air within the servo cavities of a newly installed valve will cause erratic swashplate jitter and unpredictable machine lurching. Before applying a load, safely elevate the machine or run in neutral, and actuate the joystick slightly for 3-5 minutes to cycle the fluid and bleed out all air.

• Strict Electrical Verification: Before replacing the valve, always measure the resistance of the damaged unit’s coil (e.g., 22 $\Omega$ vs. 88 $\Omega$) with a multimeter. Installing a 12V-rated coil onto a 24V control circuit will result in instant overcurrent, permanently burning out the torque motor.

• System Fluid Cleanliness: Because the PCP valve incorporates micro-filters and ultra-fine orifices, it is highly sensitive to fluid contamination. Maintain hydraulic fluid cleanliness to ISO 4406 18/16/13 or better. If machine response becomes sluggish, always inspect and replace the system’s pilot charge filter first.