Hydraulic Pressure Switch
211C223 Series
This small, lightweight, extremely reliable hydraulic pressure switch is used extensively in aerospace and is qualified for both commercial and military applications. These Eaton® switches are designed to be used in any fluid that is compatible with stainless steel or aluminum. The pressure switch design incorporates a snap-action electrical microswitch which is actuated by a piston-sensing element. A snap-action belleville spring system employing a negative rate resists movement until actuation pressure is achieved. The spring then “snaps” through and microswitch actuation occurs. This process is reversed for deactuation. The snapaction spring design is very reliable and has excellent vibration and shock resistance. A positive-rate bellevelle stack is also available for tighter setpoint tolerance.
Features: y
Small size, lightweight (approx 4 oz.), moderate cost
y
Wide pressure range
y
Snap action design
y
Meets MIL-STD-810, MIL-STD-202, RTCA/ DO-160
y
Fabricated from stainless steel or aluminum
y
Qualified for commercial and military applications
y
Environmentally sealed
y
Standard soldering is in accordance with ANSI J-STD-001, Class 3
Options: y
Filtered fluid inlet
y
Hermetically sealed electrical contacts
y
DPDT, SPDT, SPST (N.O. or N.C.)
y
Variety of port fittings, and electrical connectors
Applications:
y
For use with hydraulic oils and other select fluids.
Higher/Lower temperatures
y
Other soldering standards may be incorporated upon request, including NHB5300, MILSTD-454, or MIL-STD2000A
Suitable for: y
Pump cutoff
y
Timer operations
y
Low or High pressure
y
Miscellaneous hydraulic sensing needs
ISO 9001 AS 9100
Specifications
Pressure Range (setpoint)
300 to 5000 psi (20.7 to 345 bar)
System/Operating Pressure
0 to 8,000 psi (0 to 550 bar)
Proof Pressure
4500 to 12,000 psi (310 to 830 bar)
Burst Pressure
7500 to 18,000 psi (515 to 1,240 bar)
Temperature Range
-65ºF to +275ºF (-54ºC to +135ºC)
Electrical Rating
28 VDC 5A resistive, 2A inductive, 1A lamp load (gold contacts available for low current/ dry circuit applications
Cycle Life
100,000 cycles minimum (qualified units to 256,000)
Operating Media
Hydraulic/lubricating oil and other media compatible with Al and SST
Environment
MIL-STD-202, MIL-STD-810, RTCA/DO-160
Vibration
>20gs between 20-2,000 Hz
Shock
15 gs minimum
Weight
Approximately 4 oz. (.113 kg) (standard configuration)
Dimensions Dimensions shown in inches (millimeters)
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Eaton Aerospace Group Electrical Sensing & Controls 15 Durant Avenue Bethel, CT 06801-1901 USA Phone: (203) 796-6000 Fax: (203) 796-6313 www.eaton.com/aerospace
