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Type 21 Single Mechanical Seal

Standard single spring mechanical seal for general industrial pumps. Balanced design for pressures to 300 PSI.

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Function

Seals pump shafts using spring-loaded carbon face against tungsten carbide stationary seat.

Specifications

SpecificationValue
Shaft Diameter Range0.75 - 4.5inches
Seal Face MaterialCarbon vs Tungsten Carbide
Secondary SealViton O-Ring
Spring TypeSingle Wave Spring
Maximum Pressure300PSI
Maximum Temperature400°F

Typical Lifespan: 2-5 years depending on process conditions

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