Syrup Pump Rotor Pump Mechanical Seal Alloy Vs Ceramic ZZB-28/38/50

When sealing high-viscosity media, attention must be paid to the damping effect of the viscosity of the high-viscosity media.

High-viscosity media produce viscosity between the sealing end faces, making the carbon graphite sealing ring prone to back and forth bumps.

Usually, the viscosity limit of carbon graphite rings is below 3mPa·s.

If this value is exceeded, metal materials must be used as sealing rings (generally cemented carbide against cemented carbide).

The end face width of the non-compensating ring of the machine for high-viscosity media is extremely small, just like a knife edge.

The spring specific pressure is 10~20 times that of ordinary seals, which can cut off and remove solids generated on the sealing end face to achieve the purpose of sealing.

Its elastic element uses a hydraulically formed U-shaped bellows plus a spring, with a large spacing to prevent solids and sediments from filling the gap and losing elasticity.

This knife-edge seal was first used to seal latex liquids and is widely used in the synthetic rubber industry as well as high-viscosity liquids that are difficult to seal in fields such as asphalt and food.

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