Clarke C35 Manuale di applicazione, installazione e assistenza del prodotto - Pagina 2
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LONG TERM GREASE (LTG)
The high centrifugal forces encountered in couplings
separate the base oil and thickener of general purpose
greases.
Heavy thickener, which has no lubrication
qualities, accumulates in the grid-groove area of tapered
grid couplings resulting in premature hub or grid failure
unless periodic lubrication cycles are maintained.
Long Term Grease (LTG) provided by Clarke was
developed specifically for couplings. It resists separation
of the oil and thickener. The consistency of LTG changes
with operating conditions. As manufactured it is an NLGI
#1/#2 grade.
Working of the lubricant under actual
service conditions causes it to become semi-fluid while
the grease near the seals will set to a heavier grade,
helping to prevent leakage. LTG is highly resistant to
separation, easily out performing all other lubricants
tested. The resistance to separation allows the lubricant to
be used for relatively long periods of time. Tapered grid
couplings initially lubricated with LTG will not require
re-lubrication until the connected equipment is stopped
for servicing. If a coupling leaks grease, is exposed to
extreme temperatures, excessive moisture, or experiences
frequent reversals, more frequent lubrication is required.
Although LTG grease is compatible with most other
coupling greases, the mixing of greases may dilute the
benefits of LTG.
USDA Approval
LTG has the United States Department of Agriculture
Food Safety & Inspection Service approval for
applications where there is no possibility of contact with
edible products. (H-2 ratings).
CAUTION: Do not use LTG in bearings.
Specifications – LTG
The values shown are typical and slight variations are
permissible.
AMBIENT TEMPERATURE RANGE - -20°F (-29°C)
to 250°F (121°C). Min. Pump = 20°F (-7°C).
MINIMUM BASE OIL VISCOSITY – 3300SSU
(715cST) @ 100°F (38°C).
THICKENER – Lithium & soap/polymer.
CENTRIFUGE SEPARATION CHARACTERISTICS –
ASTM #D4425 (Centrifuge Test) – K36 = 2/24 max.,
very high resistance to centrifuging.
NLGI GRADE (ASTM D-217) – ½
CONSISTENCY (ASTM D-217) – 60 stroke worked
penetration value in the range of 315 to 360 measured at
77°F (25°C)
MINIMUM DROPPING POINT - 350°F (177°C)
minimum
MINIMUM TIMKEN O.K. LOAD – 40lbs.
ADDITIVES – Rust and oxidation inhibitors that do not
corrode steel or swell or deteriorate synthetic seals.
Packaging
14 oz. (0,4 kg) CARTIRIDGES – individual or case lots
of 10 or 30.
35 lb. (16 kg) PAIL, 120 lb. (54 kg) KEG & 400 lb. (181
kg) DRUMS.
General Purpose Grease
Annual Lubrication – The following specifications and
lubricants for general purpose grease apply to tapered grid
couplings that are lubricated annually and operate within
ambient temperatures of 0°F to 150°F (-18°C to 66°C).
For temperatures beyond this range (see Table 1), consult
the Factory. If a coupling leaks grease, is exposed to
extreme temperatures, excessive moisture or experiences
frequent reversals, more frequent lubrication may be
required.
Specifications – General Purpose Coupling Lubricants
The values shown are typical and slight variations are
permissible.
DROPPING POINT - 300°F (149°C) or higher.
CONSISTENCY – NLGI No. 2 with 60 stroke worked
penetration value in the range of 250 to 300.
SEPARATION
separation rate and high resistance to separation from
centrifuging.
LIQUID CONSTITUENT – Possess good lubricating
properties equivalent to a high quality, well refined
petroleum oil.
INACTIVE – Must not corrode steel or cause swelling or
deterioration of synthetic seals.
CLEAN – Free from foreign inclusions.
General
Purpose
Specifications
Lubricants listed below are typical products only and
should not be construed as exclusive recommendations.
Page 2 of 10
AND
RESISTANCE
Greases
Meeting
–
Low
oil
Clarke