Normal Operation:
After installation, the valve is operated
by energizing both pilot solenoids simultaneously. This
causes both main valve elements to open so that inlet air
(port 1) flows to the outlet (port 2). When the solenoids
are de-energized, both valve elements close. Air no
longer flows from inlet to outlet, but downstream air is
exhausted through port 3.
Detecting a Malfunction:
If the main valve elements
do not both open or close at the same time, the valve’s
monitor detects this condition and locks the valve out so
that it cannot be cycled. Each of the monitors detects a
malfunction in somewhat different ways, but the end result
is the same: a malfunction shuts down the valve. The
valve cannot be operated again until the monitor is reset.
Resetting a Monitor:
WARNING
: (E-P, L-G, & D-S
Monitors) Both solenoids must be de-energized before
resetting the monitor. Otherwise, the press or other
mechanism can cycle immediately, and could result in
personal injury and/or property damage.
Valve Body Service Kits.
These kits contain all parts
needed for complete reconditioning of a valve body.
Included are poppets, spindles, gaskets, seals, and
instructions for use.
Gasket and Seal Kits.
These kits are needed when valve
bodies are disassembled for cleaning. Included are all
necessary gaskets, O-rings, other seals and lubricants (these
parts are included in the
Valve Body Service Kits
above).
Solenoid Pilot Kit.
This kit contains all parts needed to
recondition one pilot valve of basic size 8, 12, and 30
double valves.
Solenoids.
Order replacement solenoids or solenoid coils
by the following part numbers (specify voltage and hertz):
Basic Size 4:
Solenoid coil only,
290B33.
Basic Sizes 8, 12, 30:
Complete solenoid,
411B04.
ROSS would be happy to service this valve for you at its factory repair center. If you purchased your valve from ROSS
please contact ROSS customer service, if you purchased your valve thru an authorized ROSS distributor please contact the
distributor for return instructions. However, if you choose to service this valve yourself, it is strongly recommended that you visit
our website at www.rosscontrols.com for available downloadable technical documentation.
If you service the valve yourself, be sure to turn off electrical power to the valve, shut off the air supply, and exhaust the air in
the system before beginning any disassembly operation. They contain the parts required to recondition pilots and valve bodies.
Service kits for monitors are also available; consult ROSS.
2
ROSS
CONTROLS
®
VALVE OPERATION
VALVE SERVICE
If you have any questions about installing or servicing your valve, call ROSS Technical Services at your nearest
ROSS location (see page 4) or in the U.S.A. at: 1-888-TEK-ROSS(835-7677).
Basic
Size
Port Sizes
Monitor
Type
Valve Body
Service Kit
Gasket
Seal Kit
Monitor
Service Kit
Lockout
Kit
Reset
Solenoid
Manual
Reset
Adaptor
Kit
Solenoid
Pilot Kit
4
3/8, 1/2, 3/4
L-G
541K77
—
545K77
542K77
—
544K77
—
—
8
1/2, 3/4, 1
E-P
429K77
438K77
421K77
—
422K77
—
—
946K87
Two kits
required for
each valve.
L-G
428K77
437K77
416K77
418K77
—
—
—
D-S
430K77
439K77
—
—
—
—
423K77
12
3/4, 1, 1
1/4
E-P
432K77
441K77
421K77
—
422K77
—
L-G
431K77
440K77
416K77
418K77
—
—
D-S
433K77
442K77
—
—
—
—
30
1
1/4
, 1
1/2
E-P
435K77
444K77
421K77
—
422K77
—
—
L-G
434K77
443K77
416K77
418K77
—
—
—
D-S
436K77
445K77
—
—
—
—
423K77
Resetting the L-G Monitor:
Basic Size 4 models have either a manual
reset button or a pneumatic reset port. All other sizes have a pneumatic
reset port only.
Models with a manual reset button (on the side of the monitor housing)
have the monitor reset simply by pushing the reset button. Models with a
pneumatic reset port (also on the side of the monitor housing) must have
a line supplying air pressure attached to the port, and a small 3/2 reset
valve to control the pressure. Basic Size 4 valves require a pressure of
at least 30 psig (2 bar), and larger sizes require a pressure of at least
60 psig (4 bar). Applying pressure to the reset port resets the monitor
so that normal operation can be resumed.
Resetting the E-P Monitor:
The E-P monitor is reset electrically. A
solenoid wired through terminals 8 and 9 resets the monitor when
energized. Energize the reset solenoid only briefly; prolonged
energization can burn it out.
Resetting the D-S Monitor:
An external switch connected to terminals
G and H is used to reset the monitor. Closing the switch
momentarily
will
reset the monitor after a delay of about two seconds. Reset can also be
accomplished by
momentarily
interrupting the power supply to the monitor.
