Stokes Mechanical Shaft Seal — Models 148, 149-20, 212J

Direct-fit aftermarket mechanical shaft seals for Stokes rotary piston / vacuum pump applications. Each seal is engineered to match critical dimensions of the original Stokes assembly for reliable sealing performance in demanding vacuum service. Select your pump model from the dropdown to match the correct configuration.

Choose the required Stokes model from the drop down menu above:

Stokes Model 148

• 33.3mm shaft size

• 57mm seat diameter

• Carbon face / stainless

• Buna (NBR) elastomers for general-purpose oil service

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Stokes Model 149-20

• 1-1/4″ shaft size

• 2.000″ seat bore

• Full rubber bellows rotary design (OEM-style concept)

• Install note: add a flat washer (up to 1/8″) behind the rotary to optimize working length/compression

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Stokes Model 212J

• 46mm shaft size (“special” variant)

• Carbon face / stainless

• Viton (FKM) elastomers for higher-temp / chemical-resistant service

• Supplied with dual wave-type springs

• Install note: for a softer compression / closer-to-OEM set length, remove one spring or stack both wave springs together

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