Can WOB-L pumps handle corrosive vapors?

Not directly, a trap or filter system should be used if working with aggressive chemicals. For corrosive applications, Welch recommends PTFE diaphragm pumps.

How does WOB-L compare to diaphragm pumps?

WOB-L pumps offer higher flow rates and better vacuum depth. Diaphragm pumps are better for chemical resistance and ultra-clean applications.

What maintenance is required?

The maintenance typically requires periodic filter checks and piston seal inspection depending on usage. No oil changes are required.

Welch Vacuum Application I Vaccum/Pressure Control with Welch Single-Head Wob-L Pumps

Welch Vacuum Application I Vaccum Pressure Control with Welch Single Head Wob L Pumps

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Why WOB-L Pumps Matter

Welch’s WOB-L pumps use a piston-driven mechanism to deliver consistent vacuum and pressure without oil contamination. That means fewer service interruptions and cleaner results. The single-head configuration is optimized for moderate-duty applications like:

Vacuum filtration
Solid-phase extraction
Degassing liquids
Aspiration of biological samples

Compared to diaphragm pumps, WOB-L units offer higher flow rates and better pressure stability. They’re also quieter than rotary vane systems and require less maintenance.

FAQs

Typical models reach down to 60 Torr, suitable for most lab filtration and aspiration tasks.