Ross W70 Series User manual

Thank You!
You have purchased a premium-quality ROSS®pneumatic valve.
It is a stainless-steel spool-and-sleeve 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.
Pneumatic equipment should be installed only by
persons trained and experienced in such installation.
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 Ports: Your valve is a multipurpose valve and may
have any of its ports restricted and/or pressurized provided
there is sufficient pilot pressure. Conventional port usage
is identified below.
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): These ports may be restricted
to control cylinder speed. To reduce exhaust noise use an
efficient silencer. ROSS silencers reduce impact noise by
as much as 25 dB, and produce little back pressure.
Electrical Supply: The voltage and hertz ratings for solenoid
pilot-operated valves can be found on the side of each pilot
housing. Ensure that the electrical supply used is equal
to these ratings to avoid solenoid burnout. The electrical
connection for these valves is achieved at the base to valve
interface by means of mating connectors.
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.
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.
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 both ports 12 and 14 in the base.
See Valve Specifications on page 2 for required pressures.
Solenoid Control: 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.
Vacuum or 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.
ROSS W70 Series valves and bases
(bases sold separately).
W70 Series ANSI Valves
ROSS CONTROLS®rosscontrols.com
VALVE INSTALLATION
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.

Pneumatic equipment should be maintained only by persons
trained and experienced in the maintenance of such equipment.
Supply Clean Air. Foreign material lodging in valves is a major
cause of breakdowns.The use of a 5-micron rated air filter located
close to the valve is strongly recommended. The filter bowl should
be drained regularly, and if its location makes draining difficult, the
filter should be equipped with an automatic drain.
Check Lubricator Supply Rate. A lubricator should put a fine
oil mist into the air line in direct proportion to the rate of air flow.
Excessive 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 is adequate.
Compatible Lubricants. Although this valve does not require air line
lubrication, it may be used with lubricated air being supplied to other
mechanisms.Some oils contain additives that can harm seals or other
valve components and so cause the valve to malfunction.Avoid oils with
phosphate additives (e.g., zinc dithiophosphate), and diester oils; both
types can harm valve components.The best oils to use 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 the 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.
To clean the valve use a solvent which will dry without leaving
a residue. This is especially important for the spool-and-sleeve
assembly. Do not use a chlorinated solvent or abrasive materials.
The former damages seals and abrasives can do permanent harm
to metal parts.
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®
IMPORTANT NOTE: Please read carefully and thoroughly
all the CAUTIONS and WARNINGS on page 4.
VALVE MAINTENANCE
To reassemble the spool and sleeve put one drop of Anderol
735 (or equivalent lubricant) on each spool land. Insert the
spool into the sleeve and rotate it several times to ensure even
distribution of the lubricant. If the valve is used in a non-lubricated
application, do not use a lubricant for reassembly which can dry
out and leave a residue. Dry assembly of the spool and sleeve is
preferable. Each spool and sleeve is a matched set, so care must
be taken not to reverse the position of the spool in the sleeve.
Before inserting the spool-and-sleeve into the valve body, very
lightly lubricate the O-rings with a compatible lubricant. Do not
use Anderol; it causes the O-rings to deteriorate.
Electrical Contacts. In the electrical circuits associated with
the valve solenoids, keep all switches or relay contacts in
good condition to avoid solenoid malfunctions.
Replace Worn Components. In some cases it is not
necessary to remove the valve from its installation for
servicing. However, turn off the electrical power to the valve,
shut off the air supply, and exhaust the air in the system before
beginning any disassembly operation. Service kits for these
valves are listed on page 3.
VALVE SPECIFICATIONS
Construction Design Spool and Sleeve
Mounting Type Base
Flow Media Filtered air
Construction
Material
Valve Body: Cast Aluminum
Spool: Stainless Steel
Seals: Buna-N
Pressure Controlled Valves
Temperature Ambient/Media: 40° to 175°F (4° to 80°C)
For other temperature ranges, consult ROSS.
Operating Pressure
Vacuum to 150 psig (10 bar)
Pilot Supply - External:
ANSI Size 1 & 20: Minimum 30 psig (2 bar)
ISO Size 2.5, 4 & 10: Minimum 15 psig (1 bar)
Pilot supply pressure must be equal to or greater than
inlet pressure.
Solenoid Pilot Controlled Valves
Solenoids Rated for continuous duty. AC power; DC for ANSI size 1
models only.
Voltage 24 volts DC; 110-120 volts AC, 50/60 Hz
Power Consumption
(each solenoid)
Solenoid Pilot models ANSI Size 1: 10 VA inrush, 24 VA
holding on 50 or 60 Hz; 5 watts on DC.
Solenoid Pilot models ANSI Size 2.5, 4, 10 & 20: 87 VA
inrush, 55 VA holding on 50 or 60 Hz; 14 watts on DC.
Direct Solenoid Pilot models ANSI Size 1: 140 VA inrush,
30 VA holding on 50 or 60 Hz; 20 watts on DC.
Direct Solenoid Pilot models ANSI Size 2.5, 4, 10 & 20:
380 VA inrush, 79 VA holding.
Temperature
Ambient: 40° to 120°F (4 to 50°C)
Media: 40° to 175°F (4° to 80°C)
For other temperature ranges, consult ROSS.
Pilot Supply Internal or External
Operating Pressure
Vacuum to 150 psig (10 bar)
Pilot Supply - Internal or External:
ANSI Size 1 & 20: Minimum 30 psig (2 bar)
ISO Size 2.5, 4 & 10: Minimum 15 psig (1 bar)
When external pilot supply, pressure must be equal to or
greater than inlet pressure.
Manual Override Flush; Rubber, non-locking

Valve Model Valve Body Gasket & Valve-Base Solenoid
Number* Service Kit Seal Kit Gasket Number
W7016A2331 708K77 — 553B11 171C95
W7016A2332 709K77 — 553B11 171C95
W7016A3331 276K87 305A87 549B11 349B04
W7016A3332 277K87 305A87 549B11 349B04
W7016C4331 W742K87 W769A87 958B11 349B04
W7016C4332 W743K87 W769A87 958B11 349B04
W7017A2331 1059K77 — 553B11 171C95
W7017A2332 275K87 — 553B11 171C95
W7017A3331 279K87 305A87 549B11 349B04
W7017A3332 282K87 305A87 549B11 349B04
W7017C4331 W744K87 W769A87 958B11 349B04
W7017C4332 W745K87 W769A87 958B11 349B04
W7056A2331 708K77 — 553B11 —
W7056A2332 — — 553B11 —
W7056A3331 276K87 305A87 549B11 —
W7056A3332 277K77 305A87 549B11 —
W7056B4331 W742K87 W769A87 356B11 —
W7056B4332 W743K87 W769A87 356B11 —
W7056A6331 W746K87 W770A87 344B11 —
W7056A6332 W747K87 W770A87 344B11 —
W7056A8331 W750K87 W771A87 339C11 —
W7056A8332 W751K87 W771A87 339C11 —
W7057A2331 — — 553B11 —
W7057A2332 275K87 — 553B11 —
W7057A3331 279K87 305A87 549B11 —
W7057A3332 282K87 305A87 549B11 —
W7057B4331 W787K87 W769A87 958B11 —
W7057B4332 W788K87 W769A87 958B11 —
W7057A6331 W748K87 W770A87 344B11 —
W7057A6332 W749K87 W770A87 344B11 —
W7057A8331 W752K87 W771A87 339C11 —
W7057A8332 W753K87 W771A87 339C11 —
W7076A2331 708K77 — 553B11 304B33
W7076A2332 709K77 — 553B11 304B33
W7076A3331 276K87 305A87 549B11 347B04
W7076A3332 277K87 305A87 549B11 347B04
W7076D4331 W742K87 W769A87 958B11 411B04
W7076D4332 W743K87 W769A87 958B11 411B04
W7076C6331 W746K87 W770A87 344B11 411B04
W7076C6332 W747K87 W770A87 344B11 411B04
W7076C8331 W750K87 W771A87 339C11 411B04
W7076C8332 W751K87 W771A87 339C11 411B04
W7077A2331 — — 553B11 304B33
W7077A2332 275K87 — 553B11 304B33
W7077A3331 279K87 305A87 549B11 347B04
W7077A3332 282K87 305A87 549B11 347B04
W7077D4331 W744K87 W769A87 958B11 411B04
W7077D4332 W745K87 W769A87 958B11 411B04
W7077C6331 W748K87 W770A87 344B11 411B04
W7077C6332 W749K87 W770A87 344B11 411B04
W7077C8331 W752K87 W771A87 339C11 411B04
W7077C8332 W753K87 W771A87 339C11 411B04
Typical cross section of a ROSS W70 Series
spool-&-sleeve valve body. Spring return model shown.
Listed below and in the chart at the right are the service
kits and other parts required to repair or refurbish W70
Series valves.
Valve Body Service Kits. These kits contain all parts
needed for a complete reconditioning of a valve body.
Included are a spool-and-sleeve assembly, 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 already included as a part of 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.
VALVE SERVICE
*Solenoid pilot models shown on the right have internal
pilot supply, and their model numbers all end in the digits
"1" or "2." Corresponding model numbers for external
pilot supply end in the digits "3" or "4," and use the same
kits as the internal supply models.
rosscontrols.com 3
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.

Printed in the U.S.A. – Rev. 08/18 © 2018, ROSS CONTROLS®. All Rights Reserved. Form SS100
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.