MCV101C1006 | Danfoss Servo Valve 225psi 650psi

Product Overview

The MCV101C1006, MCV102A2103, and MCV103A2101 are key models in the Danfoss / Sauer-Danfoss MCV series of electrohydraulic control valves, widely used for displacement and pressure control of variable displacement piston pumps.

MCV101C1006:

The MCV101C1006 is a Danfoss MCV101C series electrohydraulic servovalve featuring a two-stage four-way closed-loop control configuration with a torque motor-actuated double-nozzle flapper valve as the first-stage pilot. This valve converts low-power electrical input signals into differential output pressure for direct cylinder control, output force control, or as a pilot stage for high-flow main control valves. The MCV101C series is designed to withstand the vibration and shock of mobile equipment, making it suitable for demanding construction machinery and industrial applications. The product offers complete interchangeability within the same series.

MCV102A2103:

The MCV102A2103 is a Danfoss MCV102A series Pressure Control Servovalve (PCS)—a two-stage four-way closed-loop electrohydraulic servovalve. The valve consists of a closed-loop Pressure Control Pilot Valve and a closed-loop pressure control boost stage valve. The boost stage features a unique double-spool arrangement that offers significant cost and functional advantages over conventional single-spool designs. The MCV102A2103 is a dual coil configuration equipped with an MS Connector. The valve’s output dynamic response bandwidth is sufficient for most high-performance servo control applications, and it may be used to directly control cylinders, control output forces, or as a pilot stage for main control valves handling 40–400 gpm flow rates.

MCV103A2101:

The MCV103A2101 is a Danfoss MCV103 series electrohydraulic servovalve featuring a torque motor-actuated double-nozzle flapper valve configuration. This series functions as a pressure control pilot valve, providing control signals for Danfoss Series 90 variable displacement pumps. The R7232A controller converts remote position sensor signals into suitable output signals to drive MCV103/113 series servovalves. As an original Sundstrand servovalve, the MCV103A2101 is widely used for precise pressure control in variable pumps and hydraulic systems.

As original Danfoss / Sauer-Danfoss control valve components, these products offer complete interchangeability within their respective series, requiring no modifications to mounting interfaces or hydraulic piping layouts.

Model Code Breakdown:

MCV101C1006:

• MCV – Motor Controlled Valve

• 101C – Series Code (101C Series Electrohydraulic Servovalve)

• 1006 – Configuration/Connector Code (Packard Connector configuration)

MCV102A2103:

• MCV – Motor Controlled Valve

• 102A – Series Code (102A Series Pressure Control Servovalve)

• 2103 – Configuration Code (Dual Coil + MS Connector)

MCV103A2101:

• MCV – Motor Controlled Valve

• 103A – Series Code (103A Series Electrohydraulic Servovalve)

• 2101 – Factory Internal Configuration Code

Technical Specifications 

MCV101C1006 Specifications:

• Model: MCV101C1006

• Brand: DANFOSS / SAUER-DANFOSS

• Series: MCV101C Series

• Product Type: Electrohydraulic Servovalve

• Valve Configuration: Two-stage four-way closed-loop, torque motor-actuated double-nozzle flapper valve

• Control Type: Electrohydraulic Servo Control

• Supply Pressure: 225 psi (Approx. 15.5 bar)

• Load Pressure: 650 psi (Approx. 44.8 bar)

• Coil Configuration: Single Coil

• Connector Type: Packard Connector

• Environmental Durability: Withstands vibration and shock of mobile equipment

• Mounting: Direct Plate Mounting

• Compatible Pumps: Danfoss Variable Displacement Piston Pumps

• Weight: Approx. 1.8–2.0 kg (Reference only)

MCV102A2103 Specifications:

• Model: MCV102A2103

• Brand: DANFOSS / SAUER-DANFOSS

• Series: MCV102A Series

• Product Type: Pressure Control Servovalve (PCS)

• Valve Configuration: Two-stage four-way closed-loop electrohydraulic servovalve with double-spool boost stage

• Control Type: Electrohydraulic Servo Control, Closed-Loop Pressure Regulation

• Maximum Supply Pressure: 1000 psi (Approx. 69 bar)

• Rated Supply Pressure: 500 psi (Approx. 34.5 bar)

• Minimum Supply Pressure: 150 psi (Approx. 10.3 bar)

• Return Pressure Range: Atmospheric to 300 psi (Approx. 20.7 bar)

• Coil Configuration: Dual Coil

• Connector Type: MS Connector

• Coil Resistance (@ 24°C): 19 Ω and 15.5 Ω (dual coil)

• Rated Input Current: ±200 mA (dual coil)

• Maximum Input Signal: ±250 mA

• Coil Inductance: 0.062 H (19 Ω) / 0.047 H (15.5 Ω)

• Maximum Continuous Voltage: 7.5 Vdc @ 93.3°C

• Rated Output Differential Pressure (@ 500 psi): 156 psid (dual coil)

• Rated Output Flow: 7 gpm minimum (dual coil, @ 100 psid load pressure)

• Pilot Control Flow Range: 40–400 gpm

• Hydraulic Fluid: Petroleum-based standard

• Oil Viscosity Range: 40 – 20,000 SSU

• Operating Temperature Range: -40°C to 104°C

• Rated Temperature Range: -29°C to 104°C

• Environmental Shock: 50 G’s for 11 milliseconds

• Vibration: Mobile equipment control standard, 5–2000 Hz in three axes

• Humidity: 95% humidity @ 49°C for 10 days, meets MIL-STD-810B

• Recommended Filtration: 10 micron nominal

• Mounting: Direct Manifold Mounting

• Weight: Approx. 1.8–2.0 kg (Reference only)

MCV103A2101 Specifications:

• Model: MCV103A2101

• Brand: DANFOSS / SUNDSTRAND

• Series: MCV103 Series

• Product Type: Electrohydraulic Servovalve

• Valve Configuration: Torque motor-actuated double-nozzle flapper valve

• Control Type: Electrohydraulic Servo Control

• Function: Pressure control pilot valve providing control signals for Series 90 pumps

• Compatible Controllers: R7232A Series Controller

• Compatible Pumps: Danfoss Series 90 Variable Displacement Piston Pumps

• Body Material: High-Grade Steel

• Mounting: Direct Plate Mounting

• Weight: Approx. 1.8–2.0 kg (Reference only)

Key Technical Advantages

1. Two-Stage Four-Way Closed-Loop Electrohydraulic Servo Control
The MCV101C and MCV102A series feature a two-stage four-way closed-loop control configuration, with a torque motor-actuated double-nozzle flapper valve as the first-stage pilot, combined with a closed-loop pressure control boost stage (MCV102A) for high-precision pressure control. The MCV102A boost stage employs a unique double-spool design that offers significant cost and functional advantages over conventional single-spool designs.

2. High-Precision Torque Motor Control
The torque motor-actuated double-nozzle flapper valve configuration delivers superior dynamic response frequency and lower hysteresis compared to conventional solenoid designs. The torque motor consists of an armature mounted on a torsion pivot, precisely regulating output torque through control current to achieve high-accuracy conversion of electrical input signals to differential output pressure.

3. Superior Environmental Durability
The MCV102A series has passed rigorous environmental testing: 50 G shock testing, 95% humidity (49°C/10 days) testing meeting MIL-STD-810B, and mobile equipment vibration testing (5–2000 Hz in three axes, acceleration 1–46 G). The MCV101C series is also designed to withstand the vibration and shock of mobile equipment. These products are suitable for demanding construction machinery and industrial applications.

4. Wide Temperature and Pressure Range Stability
The MCV102A series features null shift stability over a wide temperature and pressure range. Pressure gain remains constant regardless of changes in supply pressure, return pressure, and load flow demand. The operating temperature range covers -40°C to 104°C, making it suitable for diverse extreme climate conditions.

5. Flexible Dual Coil Configuration and Redundancy
The MCV102A2103 features a dual coil configuration, allowing two command sources to be compared at the torque motor with the output signal being the algebraic sum of the two. The dual coil design provides control redundancy, enhancing system reliability and safety.

6. Modular Integrated Design and Serviceability
All MCV series products feature direct manifold mounting. The compact modular layout reduces external piping and fitting requirements, minimizing system leakage risk and installation space requirements. The pilot stage is equipped with a manual operator for hydraulic operation verification without electrical signals.

Application Areas

• Construction Machinery Hydraulics — Electrohydraulic displacement and pressure control of variable pumps in excavators, loaders, and mobile equipment

• Danfoss Series 90 Pump Control — Precise displacement and pressure control for 90R/90L series pumps

• Road Construction and Mining Equipment — Hydraulic servo control systems for road rollers, pavers, and mobile mining equipment

• Injection Molding Machinery — Closed-loop servo control of pressure and flow in pump-controlled systems

• Die-Casting Machines — Precise pressure and flow control in variable pump systems

• Material Testing Machines — Precise electrohydraulic servo control of loading force

• Marine and Port Machinery — Variable pump servo control for steering gears and winch hydraulic systems

• High-Flow Main Valve Pilot Control — Pilot stage for main control valves handling 40–400 gpm flow rates

Expert Maintenance Tips

1. Installation Guidelines

• Thoroughly clean the mounting surface and ports before installation to prevent foreign particles from entering the servovalve and causing nozzle blockage or flapper sticking.

• MCV series servovalves feature direct manifold mounting—pay special attention to alignment with locating pins during installation to prevent spool sticking due to misalignment.

• Tighten mounting bolts evenly to the specified torque to ensure proper sealing between the valve body and mounting surface.

2. Hydraulic Fluid Cleanliness

• MCV series servovalves incorporate precision nozzle-flapper mechanisms that are highly sensitive to fluid cleanliness.

• MCV102A series recommends 10 micron nominal filtration for pilot supply.

• Recommended fluid cleanliness: ISO 4406 19/17/14 or better.

• Use petroleum-based standard hydraulic fluid; verify seal compatibility if using other fluid types.

3. Electrical Connection Specifications

• MCV102A2103 is a dual coil current-driven device—use a compatible current control amplifier; do not connect directly to a voltage source.

• Rated input current is ±200 mA with maximum input signal of ±250 mA.

• Coil resistance varies with temperature (19 Ω and 15.5 Ω @ 24°C)—consider temperature effects on resistance during use.

• MCV102A2103 is equipped with an MS Connector. Verify pin assignments and supply voltage before connection.

• Shielded cables are recommended for command signal connections to prevent electromagnetic interference affecting control precision.

4. Supply Pressure and Return Pressure Configuration

• MCV102A series supply pressure range: 150–1000 psi. Rated supply pressure is 500 psi.

• Return pressure range: atmospheric to 300 psi. Ensure the return line has no throttling or back-pressure elements.

• Supply pressure fluctuations affect output differential pressure and flow—consider installing an accumulator in the supply line for pressure stabilization.

5. Periodic Maintenance Inspection

• Inspect the valve body for external oil leakage every 2,000 operating hours or at least annually.

• Check electrical connectors for looseness, oxidation, or moisture ingress.

• The pilot stage is equipped with a manual operator for hydraulic operation verification without electrical signals. Periodically test manual operation to ensure emergency functionality.

• If response lag or reduced control precision is observed, first check system fluid cleanliness and pilot screens for blockage—nozzle-flapper mechanism contamination is the most common cause of servovalve performance degradation.

• The torque motor assembly must not be disassembled by end users; any repairs should be performed by qualified hydraulic service professionals.