Reciprocating Piston Compressor Design Parameters

— Key Technical Specifications for Industrial Gas Compression

Designing a reciprocating piston compressor requires a clear understanding of several essential engineering parameters. These specifications ensure the compressor matches the customer's working conditions and meets industrial reliability standards. Below is a complete guide suitable for overseas buyers, EPC companies, oil & gas users, and industrial gas clients.

1. Inlet Pressure (Mpa.G)

A primary factor that determines the compressor's workload. Accurate suction pressure ensures proper cylinder sizing, piston speed, and stage configuration.

2. Exhaust Pressure(Mpa.G)

Defines whether the compressor requires single-stage or multi-stage compression. Higher discharge pressures demand better cooling, stronger materials, and reinforced safety design.

3. Gas Type & Composition

Different gases require different materials and sealing systems.

• Hydrogen: high-tightness sealing, anti-embrittlement materials

• Propane/Butane/Propylene: anti-corrosion and anti-swelling packing

• Natural Gas / BOG / Associated Gas: moisture & impurities evaluation
  Gas analysis sheet is essential for accurate design.

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4. Flow Rate(Nm³/h)

Measured in Nm³/min. It directly influences piston diameter, crankcase structure, and motor power.

5. Compression Stages

High pressure = more stages.
Multi-stage design reduces discharge temperature and improves efficiency.

6. Cooling System

• Water cooling for high-pressure continuous operation

• Air cooling for portable or low-pressure units

7. Lubrication Method

• Oil-free: medical, oxygen, high-purity applications

• Oil-lubricated: industrial and heavy-duty gas service

8. Motor Power & Drive System

Motor power is determined based on pressure ratio, flow rate, and piston speed.
Options include: electric motor, diesel engine, explosion-proof motor.

9. Dimensions (Size Requirements) 

The physical size of the compressor is crucial for installation and transportation.
Design must consider:

• Foundation space

• Height and width limitations in compressor rooms

• Container loading requirements (20GP/40HQ)

• Skid-mounted or integrated frame layout

Providing installation drawing requirements helps engineers design a suitable skid.

10. Material Requirements (Material Selection) 

Materials must match gas characteristics and pressure levels. Typical materials include:

• Cylinder & valves: stainless steel, alloy steel, anti-corrosion coatings

• Piston rings & packing: PTFE, PEEK, filled composites

• Crankshaft & connecting rod: high-strength alloy steel

• Sealing: oil-resistant, hydrogen-resistant, or solvent-resistant materials

Proper material selection ensures long service life and safety.

11. Instrument & Gauge Brand Requirements 

Common international-standard brands available upon request:

• Pressure gauges: WIKA (Germany), Ashcroft (USA)

• Temperature sensors: PT100, Siemens

• Control instruments: Schneider, ABB

• PLC systems: Siemens, Mitsubishi, Omron

• Valves: Swagelok, Parker, or Chinese premium brands

Choosing the right instrument brand increases accuracy and reliability in harsh environments.

12. Optional Customization

• Explosion-proof certification

• API standard design

• Skid-mounted or containerized compressor package

• Remote monitoring and IoT data logging system

Why Choose Our Reciprocating Compressors?

• 50 years of professional manufacturing

• ISO-certified factory with export experience to 40+ countries

• Engineering customization for natural gas, hydrogen, BOG, LPG, propylene, and special gases

• Reliable after-sales support and spare parts supply