How Stepless Capacity Control Shapes Flow and Pulsations

Increasing demand is placed on reciprocating compressors to have more control over the flow rates. Therefore, this session examines how stepless capacity control in reciprocating compressors affects system dynamics and pulsation characteristics. We’ll analyze the specific flow phenomena created when suction valve actuators regulate capacity from 100% to zero, with emphasis on:

• Reverse flow mechanics through regulated suction valves
• Altered frequency spectra in both suction and discharge flow profiles
• Non-proportional relationship between reduced flow rates and pulsation amplitudes

Key Technical Content

Our engineers will present quantitative analysis of how stepless control modifies higher harmonic excitations and demonstrate proper methodologies for API618 pulsation studies on variable-capacity systems.

Engineering teams responsible for compressor system design, operation, and troubleshooting will gain practical insights applicable to modern capacity control implementations.