When charging the Scavenge System, the desired pressure to obtain is

When charging the Scavenge System, the desired pressure to obtain is

• A. 1400 psi
• B. 1740 kPa
• C. 1740 psi (120 bar)
• D. 2000 psi

Answer: (C)

Setting the correct precharge pressure for the Scavenge System provides the driving force needed for the scavenging cycle to operate reliably. That pressure drives the scavenging valves and pistons, pushing out residual gases and drawing in fresh air as the system cycles. The target value is 1740 psi, which is equivalent to 120 bar. This matches the design specifications: enough force to guarantee a complete, clean scavenging action without stressing the components. A pressure like 1740 kPa would be much lower (about 252 psi) and wouldn’t provide sufficient drive. 1400 psi is also below the required level, risking incomplete scavenging. Pushing to 2000 psi exceeds the intended maximum and could overpressurize seals and parts.

Setting the correct precharge pressure for the Scavenge System provides the driving force needed for the scavenging cycle to operate reliably. That pressure drives the scavenging valves and pistons, pushing out residual gases and drawing in fresh air as the system cycles. The target value is 1740 psi, which is equivalent to 120 bar. This matches the design specifications: enough force to guarantee a complete, clean scavenging action without stressing the components. A pressure like 1740 kPa would be much lower (about 252 psi) and wouldn’t provide sufficient drive. 1400 psi is also below the required level, risking incomplete scavenging. Pushing to 2000 psi exceeds the intended maximum and could overpressurize seals and parts.