WOB-L Piston

Dynamic Compression by a Fixed Piston Inside Cylinder

WOB-L piston pumps work to reduce a volume by a fixed crank-driven piston within a cylinder.

• Compact, reciprocating design for vacuum or pressure
• Oil-less, non-lube piston and cylinder
• Lightweight die cast aluminum components or highly wear-resistant plastic
• Single stage and multistage models
• Balanced for low vibration operation
• All wetted aluminum parts treated for corrosion protection from moisture
• Long life, high performance piston seal
• Permanently lubricated bearings
• Flow rates up to 6.6 cfm (187 l/min), pressure to 160 psi (11 bar), vacuum down to 27.7 in.Hg (–940 mbar rel)

Technical Overview 
The WOB-L piston principle has a unitary piston rod whereby the piston ‘wobbles’ inside the cylinder as the crankshaft rotates. Taking the name from its principle of operation; the WOB-L trademark was patented by two engineers working at Thomas Industries, Inc. thirty years ago, and provided a piston compressor radically different from any other design on the market at that time. It remains a significant innovation in the field of compressor technology today. …read more

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