ENERGYSAVER SERIES W60 User guide

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How It Works
Solenoid Energized
Solenoid De-energized
Energy Saving Mode
(Solenoid de-energized)
NOTE: The example of “How it Works” is specific to the single
solenoid E
NERGYSAVER
®
valve. The double solenoid models
operate similarly, but as a double solenoid type valve. If you
have specific questions about the operation of the double or
single solenoid ENERGYSAVER
®
valves, please contact ROSS (see
contact information below) for more information.
Whenthesolenoidisenergized,theENERGYSAVER
®
valve operates
as a standard valve. Supply pressure is directed from the inlet
port to port 4 extending the cylinder at full pressure and force.
Air in the rod end of the cylinder is exhausted via port 3.
Upon de-energizing the solenoid, the pilot valve starts
to exhaust the pilot signal from the end of the spool.
Momentarily, the spool shifts back to a “normal” de-
energized position directing inlet air to flow to the rod end
of the cylinder (port 2 of the valve) and exhausting the
cap end.
The shuttle now has higher pressure on the opposite side
causing it to shift. Shifting the shuttle closes the connection
from the spool to the pilot exhaust and opens the cavity at
the end of the spool to feedback pressure from port 2.
Meanwhile the cylinder has begun to retract.
Because the actuating end of the spool now has high pressure
applied, the spool starts to shift to the right again closing off the
inlet port. Closing the inlet prohibits the air supply from maintaining
pressure on the rod end of the cylinder and as the cylinder continues
to retract, the pressure drops.
This pressure drop reduces the amount of force available to keep
the spool actuated against the valve return spring. So, the spool
starts to shift back thus allowing an influx of pressure to help retract
the cylinder.
TheE
NERGYSAVER
®
valveoperatesasaxedspringregulatorwhenin
the energy saving mode, maintaining the cylinder return pressure at
approximately 30 psig (2 bar). Retracting and holding the cylinder
with only 2 bar pressure consumes much less air than the standard
method of using full pressure to shift and retract.
APPLICATION WARNING:Wheninletpressureis45psig(3bar)orless,thedoubleandsinglesolenoidE
NERGYSAVER
®
valves
will pressurize port 2 and exhaust port 4, regardless of applied solenoid signals. This feature, which occurs when inlet pressure
is below 45 psig (3 bar), must be taken into consideration in your application design in order to avoid the potential for personal
injury or property damage.
Printed in the U.S.A. – Rev. 06/09 © 2003, 2009 ROSS CONTROLS
®
. All Rights Reserved. FormNPS257
WARRANTY and CAUTIONS
Standard ROSS warranty and cautions apply, available upon request or at
www.rosscontrols.com
ROSS EUROPA GmbH
Germany
Fax: [phone]
[e-mail]
ROSS ASIA
®
K.K.
Japan
Fax: [phone]
[e-mail]
ROSS UK Ltd.
United Kingdom
Fax: [phone]
[e-mail]
ROSS SOUTH AMERICA Ltda.
Brazil
Fax: [phone]
[e-mail]
ROSS CONTROLS
®
INDIA Pvt. Ltd.
India
Fax: [phone]
[e-mail]
DIMAFLUID s.a.s.
France
Fax: [phone]
[e-mail]
ROSS CONTROLS
(CHINA) Ltd.
China
Fax: [phone]
[e-mail]
ROSS CONTROLS
®
U.S.A.
Customer Svs. 1-800-GET-ROSS
Technical Svs. 1-888-TEK-ROSS
www.rosscontrols.com