Danfoss MCV102A Installation guide

DESCRIPTION

The MCV102A Pressure Control Servovalve (PCS) is a twostage, fourway, closed loop electrohydraulic servovalve that provides an output differential pressure in response to a low power electrical input signal. The PCS consists of a closed loop Pressure Control Pilot Valve and a closed loop pressure control boost stage valve. The boost stage valve features a unique double-spool arrangement that has significant cost and functional advantages over conventional single-spool deigns.

The PCS has been designed with an output dynamic response bandwidth sufficient for most high performance servo control applications. The valve may be used to directly control cylinders, to control output forces, or as a first stage to pilot operated high flow main control valves of 40 gpm to 400 gpm flow rates.

FEATURES

MCV102A

Pressure Control Servovalve

BLN-95-8963-4 Issued: October 1998

• Null shift stability over a wide temperature and pressure range

• Constant pressure gain regardless of supply pressure, return pressure and load flow demand changes

• Independent dual spool operation maximizes load flow output while maintaining proper differential pressure

ORDERING INFORMATION

SPECIFY

• MCV102A1006 (PCS with Packard Connector)

• MCV102A1014 (PCS with MS Connector)

• MCV102A2103 (PCS dual coil MS Connector)

SPARE PARTS

ITEM

NUMBER

1 K01314 Device MS Connector

2 K08106 Mating MS Connector (Bag Assembly)

3 K03377 Device Connector 2-Pin (Unassembled)

4 K03383 Mating Connector 2-Pin (Unassembled)

5 K00829 O-Ring (.364 ID x .070)

6 K00834 O-Ring (1.24 ID x .070)

7 K00830 O-Ring (.43 ID x .070)

8 K04793 Socket head cap screw 10 - 32 X 3/4

9 K00832 0-Ring (.551 ID x .070)

PART

NUMBER DESCRIPTION

• Compatible with standard 10 micron nominal filtration

• Pilot stage manual operator allows hydraulic operation to be verified without electrical signal

• Configured for direct manifold mounting

• GM Packard or MS Connector available

1,2

3,4

1320A

Location of Spare Parts Item Number.

Mounting manifolds may be made available upon customer request.

TECHNICAL DATA

ELECTRICAL

RATED FULL PRESSURE CURRENT See Two Spool, Pressure Control, Static Gain (Single Coil).

±150 mA (single coil ) (23 ohm) ±200 mA (dual coil) (19 and 15.5 ohm)

Maximum input signal is ±250 mA, which will increase

PCS output differential pressure range to approximately

1.2 times that obtained at rated input signal at rated supply pressure.

COIL RESISTANCE @ 24° C (76° F)

23 ohms (single coil) 19 ohms and 15.5 ohms (dual coil)

COIL INDUCTANCE

.14 Henries (single coil) .062 Henries (19 ohms, dual coil), .047 Henries (15.5 ohms, dual coil)

MAXIMUM CONTINUOUS VOLTAGE

7.5 Vdc at 93.3° C (200° F)

HYDRAULIC

FLUID

Petroleum based standard. Other with compatible seals

OIL VISCOSITY

40 - 20,000 SSU

FLUID AND AIR OPERATING TEMPERATURE RANGE

-40° to 104° C (-40° to 220° F)

FLUID AND AIR RATED TEMPERATURE RANGE

-29° to 104° C (-20° to 220° F)

ENVIRONMENTAL

SHOCK

50 G's for 11 milliseconds. Three shocks in both directions of the three mutually perpendicular axes for a total of 18 shocks.

VIBRATION

Withstands a vibration test designed for mobile equipment controls consisting of two parts:

1. Cycling from 5 to 2000 Hz in each of the three axes.

2. Resonance dwell for one million cycles for each

resonance point in each of the three axes. Subject to acceleration levels of 1 to 46 G's. Acceleration level varies with frequency.

HUMIDITY

After being placed in a controlled atmosphere of 95%

humidity at 49° C (120° F) for 10 days, the PCS will

perform within specification limits. Meets MIL-STD810B.

PERFORMANCE

LOAD FLOW CURVE See Two Spool, Pressure Control, Load-Flow Curve (Single Coil).

SUPPLY PRESSURE

1000 psi maximum 500 psi rated 150 psi minimum

RETURN PRESSURE

Atmospheric to 300 psi

SUPPLY FILTRATION

10 micron nominal recommended

RATED OUTPUT DIFFERENTIAL PRESSURE AT 500 PSI SUPPLY PRESSURE

±225 psid (23 ohms, single coil) ±156 psid (19 and 15.5 ohms, dual coil)

With output ports blocked

RATED OUTPUT FLOW RATE

6.6 gpm minimum (single coil) With an output load pressure of 175 psid .7 gpm minimum (dual coil) With an output load pressure of 100 psid

TWO SPOOL, PRESSURE CONTROL, STATIC GAIN (SINGLE COIL)

300

200

100

50 100 150 200

CURRENT INPUT (mA)

100

200

300

BLN-95-8963-4

OUTPUT DIFFERENTIAL PRESSURE (psid)

200 150 100 50

1253A

TECHNICAL DATA (continued)

NEUTRAL LEAKAGE

1.2 gpm maximum Consisting of pilot stage valve quiescent flow plus boost stage neutral leakage

LINEARITY

Within 5% of rated signal, maximum Pressure linearity is the deviation from the best straight line pressure gain curve in either direction expressed as

a percentage of rated input signal. Null region (±4%

OUTPUT PORT NULL PRESSURE

0 psid With supply pressure at 500 psi above return pressure, each output port pressure will be 115 psi nominal

signal) pressure gain may vary from 50 to 200% of nominal pressure gain due to boost stage null adjustment. Pressure linearity in each direction is specified from 4% to 90% input signal with a constant pressure drop across the valve.

THRESHOLD

Less than 1% of rated input signal

SYMMETRY

Will not exceed 5% in each direction

HYSTERESIS

5% of rated input signal, maximum

Symmetry is the difference in output differential pressure in each direction at rated input signal expressed as a percentage of the mean output differential pressure.

TWO SPOOL, PRESSURE CONTROL, LOAD-FLOW CURVE (SINGLE COIL)

LOW PRESURE VERSION

Pressure control servovalve

Supply pressure: 500 psi

LOAD-FLOW (P-Q) CURVE - PCS

FLOW (gpm)

175 mA

150 mA

200 mA

250 mA

225 mA

TECHNICAL DATA (continued)

PRESSURE NULL SHIFT

< ±1.5% (23 ohms, single coil) < ±1.0% (19 and 15.5 ohms, dual coil)

TEMPERATURE NULL SHIFT

< ±3 psid (23 ohms, single coil) < ±2 psid (19 and 15.5 ohms, dual coil)

125 mA

100150200250

100 mA

75 mA

25 mA

50 mA

25 mA

75 mA

50 mA

50 100 150 200 250

100 mA

125 mA

150 mA

175 mA

200 mA

225 mA

250 mA

1254A

by a current driver-type amplifier. The oil trapped between the two output ports does not exceed .4 cubic inches. See Two Spool, Pressure Control, Dynamic Response.

DIMENSIONS

See Dimensions

FREQUENCY RESPONSE

85 Hz minimum at -3db

70 Hz minimum at 90° phase lag

Specified at 500 psi supply pressure above return pressure, blocked output ports and an input signal of

±30% to ±50% of rated input signal. The PCS is driven

BLN-95-8963-4

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