EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 B-220.A
An Eaton Brand
B
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
EFV1-12-O - Proportional Valve
Proportional flow, normally open spool
Up to 104 L/min (27.5 USgpm) • 210 bar (3000 psi)
Description
This is a 2 way 2 position,
pilot operated spool type,
normally open, proportional
flow control screw in cartridge
valve. Ideal for speed control
and in conjunction with
pressure compensators to
provide proportional pressure
compensated flow control to
any actuator.
Operation
The valve is controlled by
current supplied to the coil. At
zero current, the valve is fully
open from port 2 to port 3. At
1500 to 1600 mA (12V coil) the
valve is fully closed. Port 1 is
used for pressure balancing the
spool and armature and must
be blocked in all cases. The
maximum intended pressure
drop is 300 PSID. At pressure
drops above 300 PSID, almost
no increase in flow is obtained.
The intended flow direction is
from port 2 to port 3.
Operation of the valve with flow
from port 3 to port 2 will
produce flow vs current and
flow vs pressure drop curves
that are significantly different
from those obtained with flow
from port 2 to port 3. Since the
spool and armature are pressure
balanced, the operating
pressure does not affect the
operating characteristics of the
valve. The operating point of the
valve is determined only by
current, pressure drop and
temperature.
Features
Hardened and ground working
parts to give long life with good
control; Compact design with
low pressure drop.IP69K Tough
coil compatibility, continuously
rated.
1
2
Ratings and Specifications
Performance data is typical with fluid at 21,8 cST (105 SUS) and 49°C (120°F)
Typical application pressure 210 bar (3000 psi)
Cartridge endurance rating 1million cycles
Cartridge fatigue pressure (infinite life) 210 bar (3000 psi) NFPA rated
Rated flow Flow rating “A” 95 L/min (25 USgpm)
Flow rating “B” 104 L/min (27.5 USgpm)
Internal leakage (fully closed) 77-483 cm
3
/min (5-30 in
3
/min) @ 210 bar (3000 PSID)
Nominal supply voltage 12/24 V
Current to fully close valve 1500-1600 mA (12V coil), 750-800 mA (24V coil)
Recommended PWM frequency 200-400 Hz
Coil resistance 4.7v /12V, 19.0 /24V
Mass Cartridge only 0,37 kg (0.82 lb), cartridge with coil and end nut 0,73 kg (1.62 lb)
Temperature range -30° to 90°C (-22° to 194°F)
Maximum oil temperature 120°C (248°F)
Maximum internal coil temperature 200°C (392°F)
Cavity C-12-3
Fluids All general purpose hydraulics fluids such as: MIL-H-5606, SAE 10, SAE 20, etc.
Filtration Cleanliness code 18/16/13
Housing material (standard) Aluminum or steel
Hysterisis 1 USgpm with 400Hz PWM driver
Seal kit 9900171-000 (Buna-N), 9900172-000 (Viton
®
)
Viton is a registered trademark of E.I. DuPont
Performance Data
Sectional View
1
2
3