Ross W74 Series User manual

VALVE INSTALLATION
Pneumatic equipment should be installed only by persons
trained and experienced in such installation.
Operating Pressures and Temperatures: Allowable
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.
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.
Thank You!
You have purchased a premium-quality ROSS®pneumatic valve.It is
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.
W74Series ANSI Valves
ROSS W74 Series
valves and bases
(bases sold separately).
ROSS CONTROLS®rosscontrols.com
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,
or visit rosscontrols.com to find your distributor.

Supply Clean Air: Foreign material lodging in valves is a
major cause of breakdowns. The use of a 5-micron rated
air filter located as close to the valve as possible is strongly
recommended. The filter bowl should be drained regularly. If
the filter's location makes manual draining difficult, the filter
should be equipped with an automatic drain.
Check Lubricator Supply Rate: A lubricator should put
atomized oil into the air line in direct proportion to the rate of
air flow. Excessive air line lubrication can cause puddling
in the valve and lead to malfunctions. For most applications
an oil flow rate in the lubricator of one drop per minute of air
flow is adequate.
Compatible Lubricants:This valve may be used with lubricated
air being supplied to other mechanisms. Some oils contain
additives that can harm seals or other valve components and
thereby cause the valve to malfunction. The best oils to use
are those specifically compounded for air line lubricator service.
These are generally petroleum base oils with oxidation inhibitors,
an aniline point between 180°F (82°C) and 220°F (104°C), and
an ISO 32 or lighter viscosity.
Some compatible oils are listed above at the right.These oils,
although believed to be compatible, could change without
notice because manufacturers sometimes reformulate their
oils. Therefore, use oils specifically compounded for air line
service. If it is a synthetic oil, contact the oil manufacturer for
compatibility information.
Cleaning Valve: If the air supplied to the valve has not been
well filtered, the interior of the valve may accumulate dirt and
varnish which can affect the valve's performance.
Although ROSS poppet valves are very tolerant of dirty air,
cleaning may sometimes be necessary.
To clean the valve use any good commercial solvent or
kerosene. Do not use a chlorinated solvent or abrasive
materials which can damage seals or do permanent damage
to metal parts. Before reassembling the valve lubricate all
sliding surfaces with a grease equivalent to MobilGrease 28.
Electrical Contacts:In the external electrical circuits associated
with the valve solenoids, keep all switches or relay contacts in
good condition to avoid solenoid malfunctions.
Replace Worn Components: After long usage the poppets
may show signs of wear. The valve can be reconditioned with
the use of ROSS service kits. See page 3 for information
about such kits.
COMPATIBLE LUBRICANTS
Maker Brand Name
Amoco ......................American Industrial Oil 32
Amoco Spindle Oil C, Amolite 32
Citgo ........................Pacemaker 32
Exxon .......................Spinesstic 22, Teresstic 32
Mobil.........................Velocite 10
Non-Fluid Oil ............Air Lube 10H/NR
Shell .........................Turbo T32
Sun........................... Sunvis 11, Sunvis 722
Texaco ......................Regal R&O 32
Union........................ Union Turbine Oil
2ROSS CONTROLS®
VALVE MAINTENANCE
VALVE SPECIFICATIONS
IMPORTANT NOTE: Please read carefully and thoroughly all the CAUTIONS and WARNINGS on page 4.
Construction Design Poppet
Mounting Type Base
Flow Media Filtered air
Construction Material
Valve Body: Cast Aluminum
Poppet: Rubber Coated Aluminum & Stainless Steel
Seals: Buna-N
Pressure Controlled Valves
Temperature
Ambient/Media:
Standard Temp: 40° to 175°F (4° to 80°C)
High Temp: 40° to 220°F (4° to 105°C)
For other temperature ranges, consult ROSS.
Pilot Supply Internal
Operating Pressure
30 to 150 psig (2 to 10 bar)
Pilot Supply: Minimum 30 psig (2 bar)
Pilot supply pressure must be equal to or greater than
inlet pressure.
Solenoid Pilot Controlled Valves
Solenoids Rated for continuous duty
Voltage 24 volts DC; 110/50, 110-120/60 volts AC/Hz
Power Consumption
(each solenoid)
ANSI Size 1: 5 watts on DC; 10 VA inrush, 24 VA holding
on 50 or 60 Hz
ANSI Size 2.5, 4, 10 & 20: 14 watts on DC; 87 VA inrush,
55 VA holding on 50 or 60 Hz
Temperature
Ambient: 40° to 120°F (4 to 50°C); extended to 175°F
(80°C) for High Temperature models.
Media: 40° to 175°F (4° to 80°C); extended to 220°F
(105°C) for High Temperature models
For other temperature ranges, consult ROSS.
Pilot Supply Internal or External
Operating Pressure
Vacuum to 150 psig (10 bar)
Pilot Supply - Internal or External:
Minimum 30 psig (2 bar)
When external pilot supply, pressure must be equal to
or greater than inlet pressure.
Indicator Light Included for ANSI Size 4, 10 & 20 only; one per solenoid
Manual Override Flush; Rubber, non-locking

Valve Model Valve Body Gasket & Valve-Base Solenoid
Number Service Kit Seal Kit Gasket Number
W7456A2331 712K77 — 553B11 —
W7456A2332 712K77 — 553B11 —
W7456A2336 854K77 — 553B11 —
W7456A2337 856K77 — 553B11 —
W7456A3331 696K77 — 549B11 —
W7456A3332 699K77 — 549B11 —
W7456A3336 713K77 — 549B11 —
W7456A3337 1085K77 — 549B11 —
W7456C4331 615K77 819K77 958B11 —
W7456C4332 615K77 819K77 958B11 —
W7456C4336 1065K77 — 958B11 —
W7456C4337 616K77 — 958B11 —
W7456A6331 742K77 — 344B11 —
W7456A6332 743K77 — 344B11 —
W7456A6336 811K77 — 344B11 —
W7456A6337 812K77 — 344B11 —
W7456A8331 744K77 — 339C11 —
W7456A8332 745K77 — 339C11 —
W7456A8336 711K77 — 339C11 —
W7456A8337 711K77 — 339C11 —
W7476A2331 712K77 — 553B11 304B33
W7476A2332 712K77 — 553B11 304B33
W7476A2336 854K77 — 553B11 304B33
W7476A2337 856K77 — 553B11 304B33
W7476A3331 696K77 — 549B11 347B04
W7476A3332 699K77 — 549B11 347B04
W7476A3336 713K77 — 549B11 347B04
W7476A3337 1085K77 — 549B11 347B04
W7476C4331 615K77 819K77 958B11 411B04
W7476C4332 615K77 819K77 958B11 411B04
W7476C4333 615K77 819K77 958B11 411B04
W7476C4334 615K77 819K77 958B11 411B04
W7476C4336 1065K77 — 958B11 411B04
W7476C4337 616K77 — 958B11 411B04
W7476C4338 1065K77 — 958B11 411B04
W7476B4339 616K77 — 356B11 411B04
W7476A6331 742K77 — 344B11 411B04
W7476A6332 743K77 — 344B11 411B04
W7476A6336 811K77 — 344B11 411B04
W7476A6337 812K77 — 344B11 411B04
W7476A8331 744K77 — 339C11 411B04
W7476A8332 745K77 — 339C11 411B04
W7476A8336 711K77 — 339C11 411B04
W7476A8337 711K77 — 339C11 411B04
Listed below and in the chart at the right are the service
kits and other parts required to repair or refurbish W74
Series valves.
Valve Body Service Kits. These kits contain all parts
needed for a complete reconditioning of a valve body.
Included are a spindle, all poppets and spacers, all
required gaskets and seals, detent assemblies for
valves requiring them, and instructions for use.Order
by the part number given in the chart at the right.
Valve-to-Base Gasket. If your valve is removed from
its base for any reason, a new valve-to base gasket
must be used to ensure a leak-free seal. (This gasket
is included as a part of all valve body service kits.)
Order by the part number given in the chart at the right.
Solenoid Pilot Kits. These kits contain all parts
needed to recondition the pilot valve.
Order by the following kit numbers:
Pilots using solenoid 304B33:
Kit Number: 714K77
Pilots using solenoid 347B04 or 411B04:
Kit Number: 946K87
Solenoids: Replacement solenoids can be ordered
by the part numbers given in the chart at the right.
Specify the correct voltage and hertz when ordering.
Typical cross section of a ROSS
W74 Series poppet valve body.
Internal pressure return model shown.
rosscontrols.com 3
VALVE SERVICE
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
rosscontrols.com for available downloadable technical
documentation.

Printed in the U.S.A. – Rev. 08/18 © 2018, ROSS CONTROLS®. All Rights Reserved. Form SS101
Content subject to change.
PRE-INSTALLATION or SERVICE
1. Before servicing a valve or other pneumatic component, be sure
that all sources of energy are turned off, the entire pneumatic system
is shut off and exhausted, and all power sources are locked out (ref:
OSHA 1910.147, EN 1037).
2. All ROSS®products, including service kits and parts, should
be installed and/or serviced only by persons having training and
experience with pneumatic equipment. Because any installation can be
tampered with or need servicing after installation, persons responsible
for the safety of others or the care of equipment must check every
installation on a regular basis and perform all necessary maintenance.
3. All applicable instructions should be read and complied with before
using any fluid power system in order to prevent harm to persons
or equipment. In addition, overhauled or serviced valves must be
functionally tested prior to installation and use. If you have any
questions, call your nearest ROSS location listed in the table below.
4. Each ROSS product should be used within its specification limits.
In addition, use only ROSS parts to repair ROSS products.
WARNINGS: Failure to follow these directions can adversely affect
the performance of the product or result in the potential
for human injury or damage to property.
FILTRATION and LUBRICATION
5. Dirt, scale, moisture, etc. are present in virtually every air system.
Although some valves are more tolerant of these contaminants than
others, best performance will be realized if a filter is installed to clean
the air supply, thus preventing contaminants from interfering with the
proper performance of the equipment. ROSS recommends a filter
with a 5-micron rating for normal applications.
6. All standard ROSS filters and lubricators with polycarbonate
plastic bowls are designed for compressed air applications only. Do
not fail to use the metal bowl guard, where provided, to minimize
danger from high pressure fragmentation in the event of bowl failure.
Do not expose these products to certain fluids, such as alcohol or
liquefied petroleum gas, as they can cause bowls to rupture, creating
a combustible condition, hazardous leakage, and the potential for
human injury or damage to property. Immediately replace a crazed,
cracked, or deteriorated bowl. When bowl gets dirty, replace it or
wipe it with a clean dry cloth.
7. Only use lubricants which are compatible with materials used in
the valves and other components in the system. Normally, compatible
lubricants are petroleum based oils with oxidation inhibitors, an
aniline point between 180°F (82°C) and 220°F (104°C), and an ISO
32, or lighter, viscosity. Avoid oils with phosphate type additives
which can harm polyurethane components, potentially leading to
valve failure which risks human injury, and/or damage to property.
AVOID INTAKE/EXHAUST RESTRICTION
8. Do not restrict the air flow in the supply line. To do so could reduce
the pressure of the supply air below the minimum requirements for
the valve and thereby cause erratic action.
9. Do not restrict a valve’s exhaust port as this can adversely affect
its operation. Exhaust silencers must be resistant to clogging and
must have flow capacities at least as great as the exhaust capacities
of the valves. Contamination of the silencer can result in reduced
flow and increased back pressure.
WARNINGS:
ROSS expressly disclaims all warranties and responsibility for any
unsatisfactory performance or injuries caused by the use of the
wrong type, wrong size, or an inadequately maintained silencer
installed with a ROSS product.
POWER PRESSES
10. Mechanical power presses and other potentially hazardous
machinery using a pneumatically controlled clutch and brake
mechanism must use a press control double valve with a monitoring
device. A double valve without a self-contained monitoring device
should be used only in conjunction with a control system which
assures monitoring of the valve. All double valve installations involving
hazardous applications should incorporate a monitoring system which
inhibits further operation of the valve and machine in the event of a
failure within the valve mechanism.
ENERGY ISOLATION/EMERGENCY STOP
11. Per specifications and regulations, ROSS L-O-X® valves
and L-O-X® valves with EEZ-ON® operation are defined as energy
isolation devices, NOT AS EMERGENCY STOP DEVICES.
CAUTIONS And WARNINGS
ROSSCONTROLS USA Tel: [phone] rosscontrols.com
ROSS EUROPA GmbH Germany Tel: [phone] rosseuropa.com
ROSS ASIA K.K. Japan Tel: [phone] rossasia.co.jp
ROSS UK Ltd. UK Tel: [phone] rossuk.co.uk
ROSS SOUTH AMERICA Ltda. Brazil Tel: [phone] rosscontrols.com.br
ROSS CONTROLS INDIA Pvt. Ltd. India Tel: [phone] rosscontrols.com
ROSS CONTROLS (CHINA) Ltd. China Tel: [phone] rosscontrolschina.com
ROSS FRANCE S.A.S. France Tel: [phone] rossfrance.com
ROSS CANADA Canada Tel: [phone]-ROSS (7677) rosscanada.com
(6077170 CANADA INC. A
N
INDEPENDENT REPRESENTATIVE)
STANDARD WARRANTY
All products sold by ROSS CONTROLS are warranted for a one-year period [with the exception of
all Filters, Regulators and Lubricators (“FRLs”) which are warranted for a period of seven years]
from the date of purchase to be free of defects in material and workmanship. ROSS’ obligation
under this warranty is limited to repair or replacement of the product or refund of the purchase price paid solely at the discretion of ROSS
and provided such product is returned to ROSS freight prepaid and upon examination by ROSS is found to be defective. This warranty
becomes void in the event that product has been subject to misuse, misapplication, improper maintenance, modification or tampering.
THE WARRANTY EXPRESSED ABOVE IS IN LIEU OF AND EXCLUSIVE OF ALL OTHER WARRANTIES AND ROSS EXPRESSLY DISCLAIMS
ALL OTHER WARRANTIES EITHER EXPRESSED OR IMPLIED WITH RESPECT TO MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. ROSS MAKES NO WARRANTY WITH RESPECT TO ITS PRODUCTS MEETING THE PROVISIONS OF ANY GOVERNMENTAL
OCCUPATIONAL SAFETY AND/OR HEALTH LAWS OR REGULATIONS. IN NO EVENT IS ROSS LIABLE TO PURCHASER, USER, THEIR
EMPLOYEES OR OTHERS FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES WHICH MAY RESULT FROM A BREACH OFTHE WARRANTY
DESCRIBED ABOVE OR THE USE OR MISUSE OF THE PRODUCTS. NO STATEMENT OF ANY REPRESENTATIVE OR EMPLOYEE OF
ROSS MAY EXTEND THE LIABILITY OF ROSS AS SET FORTH HEREIN.