Preserve, Prosper, Perform: A Blueprint for Molecular Pump Success


Achieving peak performance and enduring reliability are the cornerstones of effective molecular pump management. Within this blueprint, we present pivotal practices that will fortify your equipment, guaranteeing it functions at its zenith.

1. Manufacturer's Guidelines

Adhere strictly to the manufacturer’s specified operating environment and usage parameters for the molecular pump.

2. High-Vacuum Protection

Implement robust protective measures for the high-vacuum end of the molecular pump to prevent potential damage from direct exposure to atmospheric conditions during operation.

3. Pressure Threshold Adherence

Exceeding the maximum pressure threshold, as specified by the manufacturer, on the foreline (low-vacuum end) of the molecular pump can lead to overheating, potentially causing significant harm to the bearings and, in severe cases, result in complete system failure.

4. Avoid Dead Connections

Avoid employing a “dead connection” configuration for both the inlet and outlet of the molecular pump. In instances where the foreline pipeline is fixed, the inability of the pump casing to expand after heating can induce improper material stress.

This restricts the rotor’s freedom of movement, and over time, even a slight remaining imbalance can lead to bearing failures and rotor damage.

5. Particle Ingress Management

In situations where it is impossible to prevent particulate matter from passing through the inlet protective cover and entering the molecular pump, consider alternative orientations such as an inverted or differently angled installation. 

For processes prone to deposit formation, such as Chemical Vapor Deposition (CVD), continuous coating on the rotor and housing components may result in imbalances and vibrations, potentially causing rotor fractures. Shielding measures are imperative in such scenarios.

6. Baking Process Guidelines

When subjecting the pump to baking processes, strictly observe the manufacturer’s recommended maximum baking temperature. High temperatures necessitate effective cooling measures to preserve the pump’s integrity.

7. Eddy Current Awareness

Be aware that operational molecular pumps may generate eddy currents in the rotor due to magnetic fields. This phenomenon induces rapid rotor heating. If these conditions persist at elevated levels, it is imperative to implement proper shielding measures. If the magnetic field distribution is known, consider repositioning the pump accordingly.

8. Radiation Considerations

In environments with varying intensity and duration of neutron and gamma radiation, exercise caution as such radiation may cause damage to electronic drives and inverters installed on the pump. In such cases, utilize connecting cables to install electronic drives at a safe distance from the radiation source.

These guidelines guarantee the integrity and peak performance of your molecular pump. With regular maintenance, adherence to manufacturer specs, and strategic protective measures, you’ve laid the groundwork for success. Move forward with confidence in your equipment’s readiness for optimal performance.

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