Ross W74 Series Quick Start Manual

W74
Thank You!
You have purchased a premium-quality ROSS
a single-spindle poppet valve built to the highest standards.
With care in its installation and maintenance you can expect it to
have a long and economical service life. So before you go any
further, please take a few minutes to look over the information in
this document. Then, save it for future reference and for the useful
service information it contains.
Please read and make sure you understand all installation instructions before proceeding with the installation.
Additional technical documentation is available for download at rosscontrols.com.
If you have any questions about installation or servicing your valve, please contact ROSS or
your authorized ROSS distributor, see contact information listed at the back of this document,
Pneumatic equipment should be installed only by persons
trained and experienced in such installation.
Operating Pressures and Temperatures:
ranges for pressure and temperatures are given in the
Valve Specifications on page 2. Exceeding the values
shown can shorten valve life.
If the model number on your valve ends with 336, 337, 338,
or 339 your valve is designed for high temperature service.
If the model number on your valve ends with 331, 332, 333,
or 334 your valve is designed for standard temperatures.
If the model number ends with any other group of digits you
have ordered a valve with special characteristics. Consult
ROSS to verify the characteristics of your particular valve.
Air Lines: Before installing a valve in a new or an existing
system, the air lines must be blown clean of all contaminants.
It is recommended that an air filter be installed in the inlet
line close to the valve.
Valve Inlet (Port 1): Be sure that the supply line is of
adequate size and does not restrict the air supply because of
a crimp in the line, sharp bends, or a clogged filter element.
Valve Outlets (Ports 2 & 4): For faster pressurizing and
exhausting of the mechanism being operated by the valve,
locate the valve as close as possible to the mechanism.
The lines must be of adequate size and be free of crimps
and sharp bends.
Valve Exhausts (Ports 3 & 5): Exhaust air flow must not
be restricted for proper valve performance. However, any
properly sized silencer, such as a ROSS silencer, should
be used to reduce impact noise without providing excessive
back pressure.
ROSS CONTROLS
®
ANSI Valves
Series
pneumatic valve. It is
®

VALVE INSTALLATION

or visit rosscontrols.com to find your distributor.
Allowable
ROSS W74 Series
valves and bases
(bases sold separately).
Electrical Supply: The voltage and hertz ratings of the valve
solenoids (if any) are shown on the pilot housings. Electrical
supply must correspond to these ratings. Otherwise life of
the solenoids will be shortened.
Electrical power from the valve's base goes to the solenoid(s)
via the plug-in connector at the valve-base interface. If
power is supplied by a transformer it must be capable
of handling the inrush current without significant voltage
drop. See Valve Specifications on page 2 for information
on in-rush current.
Pilot Supply:
Pressure Control: For valves with single remote pressure
control, connect the control line to port 14 in the sub-base
or manifold. For valves with double remote pressure control,
connect the control lines to ports 12 and 14 in the base.
See Valve Specifications on page 2 for required pressures.
Solenoid Pilot: Pressure for the pilot valves is supplied
from the inlet port. Be sure that the external pilot supply
port in the base is plugged or pilot air will escape. If the
valve must operate with an inlet pressure less than the
required pilot pressure (see Valve Specifications on page
2), an external pilot supply must be provided. Connect to
the appropriate port in the base.
Non-Air Service: Such applications require an external
pilot supply for solenoid valves. Connect to the appropriate
port in the base.
Pipe Installation: To install pipe in valve or base ports,
engage pipe one turn, apply pipe thread sealant (tape
not recommended), and tighten pipe. This procedure will
prevent sealant from entering and contaminating the valve.
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