LPG Vertical Compressors
| Many LPG (propane & butane) and agricultural ammonia piping systems do not have ideal conditions for net positive suction head (NPSH). As a result the poor NPSH conditions lead to excessive pump maintenance. Since reciprocating compressors are only exposed to vapors, 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 Corken 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) 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 applications include propane, butane, agricultural ammonia, and natural gas. |
LPG Reciprocating Compressors (Non Oil-Free)
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
- 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
- One packing set per piston rod
- Does not offer oil-free compression
- Utilizes a V-ring packing design (V-rings, a male and female packing ring, washers, and a spring)
- Single stage design only (exception: model 891 offer two-stage compression)
- Four single-acting models (91, 291, 491 & 691) and one double-acting (D891)
- Cylinder sizes are 3.0″, 4.0″, and 4.5″Available with NPT or Class 300 RF connections
| Piston Displacement | up to 117 cfm (198.8 m3/hr) |
| Working Pressure: | up to 450 psi (31 bar g) |
| Brake Horsepower | up to 45 hp (34 kw) |
| Maximum Outlet Temperature | 350°F (177°C) |
- Head and cylinder: Ductile iron
- Crosshead guide, crankcase, flywheel and bearing carrier: Gray iron
- Valve seat and bumper: stainless steel or ductile iron
- Valve plate: PEEK or stainless steel
- Valve spring: Stainless steel
- Pistons: Ductile iron, gray iron, stainless steel
- Piston rings: PTFE (glass and moly filled)V-ring packing: PTFE (glass and moly filled)Packing cartridge: Ductile iron
- Crankshaft: Ductile iron
- Connecting rod: Ductile iron
- Connecting rod bearing: Bimetal Babbitt
- Wrist pin: Steel
- Wrist pin bushing: Bronze
- Main bearing: Tapered roller
- O-rings: Buna-N, Neoprene® (Registered trademark of the DuPont)
- 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
- Agricultural ammonia
- Butane
- Natural gas
- Propane
- And many more
- Vapor recovery
- Liquefied gas transfer
- Pressure boosting
- Tank evacuation
- Rail car loading and unloading
- And many more
- Oil and natural gas production
- Liquefied gases
- Truck and transport
- Liquid terminals
- Marine