Compressor are most suitable for industrial refrigeration
and low Temperature. Applications such as Cold storage, Ice
Plants, Fisheries plants, Ice cream plants, Dairy plants,
Chemical plants, Pharmaceutical plants & Air Conditioning
plants, Colt range of open type compressors are available
in single as well as in double stage versions with use on
Ammonia (NH3), R-12 and R-22 Refrigerant etc. They are well-designed
and robust machines capable of running continuously, for prolonged
period with minimum attention. These compressors by virtue
of their high speed and multiplicity of cylinder exceptionally
compact and economical of space They are also designed to
accommodate varying refrigeration demands with maximum economy
in power and are well suited to automatic installations.
are available in two different series
- Colt-1, Colt-2, Colt-3, Colt-4,
Colt-6, Colt-9, Colt-12
- Colt-21, Colt-31, Colt-42, Colt-51,
Colt-63, Colt-72, Colt-84, Colt-93, Colt-102
Features Of Construction
Cylinder Housing -
They are made of welded steel, which ensures rapid heat dissipation,
and the crankcase is absolutely smooth and is provided with
a special paint coating externally.
Cooling - Water jackets are provided to cylinder
heads for low discharge temperature.
Hand hole Covers
- Large hand hole covers helps in quick maintenance
of parts subjected to maximum wear with minimum need of special
Covers - Bigger diameter pump side and seal side
covers are provided so that without unloosing the weights,
the crankshaft can be inserted into the crankcase and makes
the service easier.
The crankshaft is forged of special steel and ground to very
fine tolerances. Dynamically balanced to ensure vibration
free operation. It is carried on two wrapped bi-metallic bushes
within the crankcase. When necessary this type of bearing
can easily be replaced.
Shaft Seal Assembly
- The drive end of the crankshaft is made totally
leak proof by a special rotary face type oil seal that is
finely lapped and prevents any leakage of oil and gas from
this end. The seal is oil cooled by direct oil from pump to
remove frictional heat.
- The connecting rods are die forged of special
steel and allow forced lubrication of piston pins, which moves
in bronze bush. The big end of connecting rod has white metal
shell type composite bearing & small end has bronze bearing
grooved for uniform lubrication of piston pin bush.
- They are interchangeable and are made of fine
- grained centrifugal cast, alloy iron, which are bored and
honed, which provides mirror like inner surface. These are
force fitted in cylinder and could be easily removable thus
save servicing cost and time.
Piston Rings - The piston are cast in Aluminum
alloy of high wear and corrosion resistance. These are fitted
with 3-compression rings to form a sliding seal between piston
and the liner wall, there by increase efficiency and two oil
ring to minimize oil carry over.
- Total safety is ensured by this spring, which
protect compressors from incidental liquid hammer.
The main bearings, big end bearing and the center bearing
are made of steel shell, lined with metal coating. The intermediate
bearings are provided with split type bearing of the same
Pump - Our special designed
pump have gear with extended shaft, which provides long life.
The gear is directly driven by the crankshaft and has a differential
pressure regulator, which provides different oil pressures
for lubrication and control oil system.
Lubrication - The pump
takes oil from the crankcase through fine mesh strainer and
delivers oil to all bearings, crankshaft seal and also to
the unloading and capacity control system. The compressor
is protected against oil failure by a differential oil switch,
which causes the compressor to stop if the pressures fall
bellow a predetermined minimum. Oil pressure can be maintained
by adjustable spring loaded valve/regulator.
Sight Glass - Easy monitoring
is insured by two built-in-sight glasses, making oil return
Oil Filters - Trouble
free long running life due to highly effective oil purification
by two oil filters.
Cylinder Loading- Unloading and Capacity
Control System - Colt series compressors are designed
to provide the compressors with a no load start thus requiring
low starting torque on motor. All cylinders are built in with
a valve lifting mechanism, which are working on hydraulic
mechanical devise and operate on high oil pressure from the
pump. For unloading, the suction valve plates are lifted free
from their seats by pressuring assembly in the unloading mechanism.
Loading of the cylinder is effected by admitting control oil
pressure to the V.L.D piston via unloader solenoid valve,
allowing the suction valve ring to descend on its seats. This
capacity control could be used for stepping down capacity
in response to changing loads, thus it helps to save power.
Suction Strainer - Easy
cleaning of the suction gas strainer, as gauge strainer element
can be removed/ replaced easily.
Safety Valves - On each
compressor one or more safety valves are provided, which are
made of high-grade material and built with great precision,
fitted between the suction and discharge manifold. These safety
valves are of reputed "SUPER" make. Being a very
important component for safety of the plant and according
to mutual understanding with the company, our valuable customer
will also get an advantage of free of cost service once in
a year on these valves.