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Rockford Systems, LLC—www.rockfordsystems.com
Call: 1-800-922-7533
DM
2
Series D Dual-Solenoid Valves
SECTION 7—MAINTENANCE
Supply Clean Air—Foreign material lodging in valves is a ma-
jor cause of breakdowns. The use of a 5-micron-rated air filter
located close to the valve is strongly recommended. The fil-
ter 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 lu-
bricator of one drop per minute is adequate. Note that the dual-
solenoid valve itself does not require air line lubrication.
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 below. These oils, although be-
lieved 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 synthet-
ic 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.
A schedule should be established for cleaning all valves, the fre-
quency depending on the cleanliness of the air being supplied.
To clean the valve, use any good commercial solvent. Do not
scrape varnished surfaces. Do not use chlorinated solvents
or abrasive materials . The former damages seals, and abrasives
can do permanent damage to metal parts. Before reassembling
the valve, lubricate all sliding surfaces with a grease such as Dow
Corning BR 2 Plus.
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 most 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,
exhaust the air in the system, and lock out before beginning any
disassembly operation. See page 16 for repair kits.
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
COMPATIBLE LUBRICANTS
Pneumatic equipment should be maintained only by persons trained and experienced in the maintenance of such
equipment.
After any maintenance, always operate the machine numerous times in all modes of operation before allowing
the operator to start production. Always make sure all point-of-operation safeguarding is in place, adjusted and
operating properly for the job and the operator.
