Massvac filter

Massvac 335025+400976 vacuum pump system

The Massvac 335025+400976 vacuum pump system combines Demaco Vacuum's 335025 4-inch positive trap front stage filter with compatible filter cartridges (such as 400976) and Massvac brand vacuum pumps. The following is a detailed analysis based on validated technical specifications and compatibility insights:

System components and compatibility

Demaco 335025 filter:

A front-end filter designed specifically for medium to high vacuum applications such as vacuum coating and semiconductor processes.

Equipped with a DN25 KF flange (diameter 25mm), it can be directly connected to vacuum pumps with KF25 ports (such as Massvac's screw drive series pumps, such as HD20/HD40).

Can accommodate 4-inch filter cartridges (such as polypropylene filter cartridges) for particle filtration.

The angle version design can minimize the space requirements in the vacuum system to the greatest extent possible.

Filter element 400976:

It may be a third-party or specialized replacement component (not explicitly listed in Demaco's catalog). To ensure compatibility:

Ensure that the filter cartridge diameter is 4 inches and has a DN25 KF flange connection.

Verify that the micron level (such as 2-20 microns) is consistent with the pump's pollution tolerance.

Demaco's positive trap filters support filter cartridges such as 400925 (2 microns) and 400935 (5 microns), which are factory approved for optimal performance.

Massvac vacuum pump:

Massvac's spiral drive series (such as HD20, HD40) includes oil sealed rotary vane pumps with KF25 inlet and outlet flanges, directly compatible with 335025 filters.

These pumps are optimized for laboratory or industrial use, with low noise and compact design.

Ensure that the vacuum range of the pump (such as maximum pressure ≤ 0.01 millibars) matches the specifications of the filter.

Installation and integration

Physical connection:

Use a fluororubber O-ring to seal the DN25 KF flange between the filter and pump. Tighten the flange clamps evenly to prevent leakage.

Install the filter downstream (at the front stage) of the pump to protect it from particles and condensates.

Leave a 1.5-inch gap around the filter for disassembly of the collection tank during maintenance.

Filter installation:

Clean the filter housing before inserting the 400976 filter element. Align and secure the flange of the filter element with the housing.

Follow Demaco's flange tightening torque guidelines (KF25 clamp typically 10-12 N · m).

If using non original filter cartridges, confirm their resistance to burst pressure (standard polypropylene filter cartridges ≥ 15 psi).

Performance and Maintenance

Filtration efficiency:

The 335025 filter paired with Demaco's 400925 filter element can reduce particle contamination (such as metal debris and process residues) to ≤ 2 microns, extending the service life of the pump.

For corrosive or oily environments, consider using Massvac's VISI Trap ® Insert components (stainless steel mesh, molecular sieve) to ensure chemical compatibility.

Maintenance plan:

When the pressure difference between the two ends of the filter exceeds 15-20 'H2O (measured by a pressure gauge), replace the 400976 filter element.

Check for corrosion or damage to the filter housing when replacing the filter element. Clean reusable components (such as stainless steel filters) with isopropanol.

The Massvac pump requires oil change every 500-1000 hours of operation depending on the workload.

Common problem troubleshooting

Pump performance degradation:

Filter blockage: If the pressure drop increases, replace the 400976 filter element.

Leakage: Check the KF flange seal and O-ring. For critical applications, use a helium leak detector.

Excessive noise/vibration:

Misalignment: Ensure that the filter and pump are securely installed and the flange connection is firm.

Deterioration of oil quality: If the pump oil appears black or contaminated, replace the pump oil.

Filter compatibility:

If the 400976 filter element is non original, verify its chemical resistance (such as polypropylene acid resistance, but not resistant to solvents such as acetone).

Safety and Best Practices

Personal protective equipment (PPE): Wear gloves and safety goggles when handling vacuum components, especially when replacing filters.

Ventilation: Use Massvac's VISI-MIST at the exhaust port of the pump ® Oil mist eliminator (such as 360915 filter element) is used to capture oil mist.

file:

Refer to Demaco's 335025 installation manual for flange torque specifications and filter insertion steps.

Refer to Massvac's pump manual for recommended oil types (such as ISO VG 100 mineral oil).

suggestion

Original factory and third-party: Although third-party filters like 400976 may be suitable, Demaco's 400925/400935 filters have been validated to achieve optimal flow and pressure drop.

System testing: Conduct a vacuum decay test (such as holding at 10 millibars for 10 minutes) to ensure leak free operation after installation.

Supplier support: Contact Demaco Vacuum or Massvac directly for customized filtration solutions or pump/filter pairing guidance.

By integrating the 335025 filter with the Massvac pump and verifying the compatibility of the 400976 filter cartridge, you can achieve a powerful vacuum system with reliable pollution control. Always prioritize following the manufacturer's recommendations to ensure compliance with warranty terms and long-term performance.