Gas Flow Unit Conversion Calculator: Standard Liters per Minute (SLPM) to Standard Cubic Feet per Minute (SCFM)

This Gas Flow Unit Conversion Calculator will help engineers, HVAC specialists, and process automation experts easily change Standard Liters per Minute (SLPM) to Standard Cubic Feet per Minute (SCFM). This conversion is very important in fields like semiconductor production, chemical processing, gas metering, and compressed air systems, where exact gas flow measurements are needed for safety compliance, control loop stability, and energy efficiency.

Definition: Standard Liters per Minute (SLPM)

SLPM is a unit of volumetric gas flow rate that tells you how many liters of gas flow through a system in a minute under normal conditions, which are usually 0°C or 20°C and 1 atm pressure, depending on the standard used. It is often used in labs, gas analyzers, and networks that move gas around in factories.

Key Applications of SLPM:

• Measuring the flow of purge gas in labs and analytical devices.
• Controlling how much gas is used in making semiconductors and drugs.
• Controlling the amount of fuel and air that mix during combustion.
• Keeping an eye on inerting systems that use nitrogen or argon fluxes.

Definition: Standard Cubic Feet per Minute (SCFM)

SCFM is a standard measure of volumetric flow rate in the U.S. It shows how much gas moves in a minute at normal conditions, which are usually 14.7 psia, 68°F or 70°F, and 0% humidity. In the industries that deal with compressed air and gas, SCFM is a common reference.

Key Applications of SCFM:

• Sizing compressors, vacuum systems, and blowers.
• Evaluating pneumatic tool performance.
• Designing gas transport systems in oil & gas and petrochemical industries.
• Controlling HVAC and exhaust systems for air quality compliance.

Formula for SLPM to SCFM Conversion

To convert SLPM to SCFM, use the following conversion factor:

Flow in SCFM=Flow in SLPM÷28.3168

Since 1 SCFM = 28.3168 SLPM, dividing the SLPM value by 28.3168 gives the equivalent in SCFM.

Example Calculation

If a system gives off 1,700 SLPM of nitrogen gas, the same amount in SCFM is:

1,700 SLPM÷28.3168=60.02 SCFM

So, 1,700 SLPM is approximately 60.02 SCFM.

Quick Reference Conversion Table

Uses of SLPM to SCFM Conversion

• Instrumentation Calibration: sensors and mass flow controllers are calibrated correctly in both SI and US customary units.
• International Engineering Projects: Helps teams from different countries and regions work together on design by employing multiple measuring standards.
• Regulatory Compliance: Makes it possible to report gas in units that are required by regional or worldwide codes.
• Design of the control system: helps you choose the right gas flow regulators, valves, and flow transmitters.
• Energy Efficiency: Helps improve gas supply systems and programs for finding leaks.

Engineers, system integrators, process designers, and maintenance personnel all need this calculator to make sure that gas flow unit conversions are always correct and consistent throughout all technical fields.

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