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PF-073 · Verified method

Reciprocating Compressor Displacement Calculator

Calculate swept displacement from bore, stroke, rpm and cylinders.

Inputs

AFFILIATE LINKS

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ENGINEERING GUIDE

Use the Reciprocating Compressor Displacement Calculator to calculate swept displacement from bore, stroke, rpm and cylinders. The calculator uses Bore diameter, Stroke, Number of cylinders, Speed and Acting mode and reports theoretical displacement.

How to interpret the result

Read the result in the context of the selected units and pressure basis. For this tool, the primary outputs are theoretical displacement. Change one input at a time when comparing scenarios so the effect of each variable remains clear.

Formula and methodology

PneumaForge applies this verified method: Swept volume × cycles/time. The functional engine is shared with related tools in the compressor-displacement family, while this page solves the specific intent represented by reciprocating compressor displacement calculator.

Swept volume × cycles/time

Variables and inputs

  • Bore diameter
  • Stroke
  • Number of cylinders
  • Speed
  • Acting mode

Worked example

Reproducible example: start with the calculator's default values (Bore diameter = 100; Stroke = 100; Number of cylinders = 2; Speed = 1000) and calculate the result. Then change the variable most relevant to your application and compare the new theoretical displacement against the baseline.

Assumptions and limits

All flow and power bases must match; ISO 1217/CAGI package data preferred for real compressor comparison.

Engineering tips

  • Use FAD or another clearly stated reference flow consistently across compressor comparisons.
  • Prefer measured package input power or CAGI/OEM data when comparing real machines.
  • Separate peak demand, average demand and redundancy requirements before selecting installed capacity.
  • Keep the inputs used for reciprocating compressor displacement calculator on a consistent engineering basis before comparing alternatives.

Frequently asked questions

What does the Reciprocating Compressor Displacement Calculator calculate?

It is designed to calculate swept displacement from bore, stroke, rpm and cylinders. The reported outputs are theoretical displacement.

What inputs does the Reciprocating Compressor Displacement Calculator use?

The calculator uses Bore diameter, Stroke, Number of cylinders, Speed and Acting mode. Only use values that represent the same operating condition or design case.

What formula or method is used?

The calculation follows: Swept volume × cycles/time. The page also states the assumptions that define where the method is valid.

Which assumptions can affect the result?

All flow and power bases must match; ISO 1217/CAGI package data preferred for real compressor comparison.

Can I use different units?

Yes. PneumaForge converts supported units through canonical engineering units. For compressed-air reference flows and pressure bases, the reference pressure and temperature must also remain consistent.

Technical sources