Sealing Industrial Mixers.
Industrial mixers cover a wide spectrum of equipment, but they share a common sealing problem: a vertical or horizontal shaft passing through a tank or vessel under intermittent pressure, agitated load, and frequent product changeover. The right seal depends almost entirely on what's inside the tank.
01The equipment
What an industrial mixers actually is.
An industrial mixer in this context is any vessel agitator with a shaft penetration through the head or shell. Top-entry, side-entry, and bottom-entry configurations all share the same sealing geometry: a rotating shaft passing through a stationary housing, where the seal must hold against the process on one side and the bearing housing on the other.
02Failure modes
Why sealing this equipment is hard.
- 01
Variable shaft loads from agitator dynamics
Agitators apply non-uniform shaft loads — radial deflection from off-balance impellers, axial thrust from down-pumping designs, vibration from intermittent product. Self-aligning gland design is mandatory.
- 02
Vacuum and pressure cycling per batch
Most batch reactors cycle from full vacuum (deaeration) to 30 psig (pressure cooking, sterilization) per batch. A balanced seal handles the cycle without elastomer fatigue.
- 03
Crystallizing and high-solids service
Crystallizers and high-solids slurries form deposits at the seal face. Outside-mounted designs (7600) keep the running gear out of the deposit zone.
- 04
Multi-product changeover and CIP
Shared mixers running multiple products require crevice-free seal geometry and elastomers that survive caustic CIP. The 7800 CEMA is the standard recommendation for sanitary mixers.
03Recommended series
What we ship for industrial mixers.
All-stainless, washdown-rated seal for food, dairy, and pharma equipment.
Specs Series9700When the process is mean — strong acids, hot brine, abrasive slurries.
Specs Series7600Outside-mounted single mechanical seal for thin liquids and mild corrosives.
Specs SeriesCHOPEngineered for the 3,600 RPM chopper, not adapted from a slow-speed seal.
Specs04Industries that use this equipment
Where you'll find industrial mixers in production.
05Engineering FAQ
What plant engineers ask before specifying.
Industrial Mixers · sized in 24 hours
Get a sized seal recommendation for your industrial mixers.
Send shaft size, OEM make and model, and the operating envelope. We respond with a sized series, materials, and pricing — typically within one business day.