The meter components required to prevent vapor from entering the meter before or during liquid transfer are:

The meter components required to prevent vapor from entering the meter before or during liquid transfer are:

• A. Vapor Eliminator
• B. Check Valve
• C. Pressure Relief Device
• D. Flow Meter

Answer: (A)

When transferring liquid propane, keeping vapor out of the meter is crucial because vapor entering the meter can cause inaccurate readings and potential safety issues. A vapor eliminator is designed to separate or trap vapor before it reaches the meter, allowing only liquid propane to pass through. This keeps the meter accurate and reduces vapor loss during transfer. The other devices don’t perform this separation. A check valve prevents backflow but doesn’t prevent vapor from entering the meter if vapor is present in the line. A pressure relief device protects against overpressure, not vapor entry. A flow meter measures how much product is moving, but it doesn’t stop vapor from getting into the meter. Therefore, the vapor eliminator is the component that prevents vapor from entering the meter during liquid transfer.

When transferring liquid propane, keeping vapor out of the meter is crucial because vapor entering the meter can cause inaccurate readings and potential safety issues. A vapor eliminator is designed to separate or trap vapor before it reaches the meter, allowing only liquid propane to pass through. This keeps the meter accurate and reduces vapor loss during transfer.

The other devices don’t perform this separation. A check valve prevents backflow but doesn’t prevent vapor from entering the meter if vapor is present in the line. A pressure relief device protects against overpressure, not vapor entry. A flow meter measures how much product is moving, but it doesn’t stop vapor from getting into the meter. Therefore, the vapor eliminator is the component that prevents vapor from entering the meter during liquid transfer.