Many LPG (propane & butane) and agricultural ammonia piping systems do not provide ideal net positive suction head (NPSH) conditions for liquid pumps. As a result the poor NPSH conditions lead to excessive pump maintenance. Since reciprocating compressors are exposed to vapors only, poor NPSH conditions are not a factor. Many LPG and agricultural ammonia pressurized tanks such as tank cars and buried tanks have top unloading connections. A reciprocating compressor is the perfect solution for transferring liquids in this type of application.
Most of Corken’s vertical LPG reciprocating compressors have single packed piston rods and none offer oil-free gas compression. The only exception is the model D891 which has two sets of packing (one V-ring and one segmented); however, but it is not oil free. Single packed, non oil-free compressors are typically used in non-corrosive and non-toxic applications where oil-free service and leakage containment are not critical. Typical application include propane, butane, agricultural ammonia, and natural gas.
LPG RECIPROCATING COMPRESSORS
Single packed compressors are typically used in non-toxic, non-corrosive applications where oil-free gas and leakage containment are not critical. LPG (propane & butane), agricultural ammonia, and natural gas applications are where a single packed compressor fits well.
>> Utilizes one set of V-ring packing per piston rod and
>> No distance piece between the cylinder and crosshead guide
>> Not oil free
>> Single stage compression
>> Ideal for non-toxic, non-corrosive applications where oil-free gas and leakage containment are not critical
>> All cylinders and heads are made of ductile iron for maximum thermal shock endurance
>> A single packed compressor is a great low cost option for applications where oil-free gas and leakage containment are not critical
>> Valve design offers quiet operation, high efficiency and greater durability
>> The step-cut design of the self-lubricating piston rings provides higher efficiencies during the life of the piston ring
>> Positively locked pistons allows end clearance to be precisely set to provide maximum efficiency and long life
>> Packing sets are a spring loaded seal design that self adjusts to compensate for normal wear
>> Adjustable packing screw ensures maximum sealing capacity throughout the life of the packing (exception: model 891)
>> Cast iron crossheads provide superior resistance to corrosion and galling
>> Pressure-lubricated crankcase with filter keeps the internals well lubricated at all times and minimizes premature wear