SMSC 1SV — Single Cartridge Mechanical Seal (ANSI)
Our SMSC 1SV is a single cartridge seal built on an ANSI footprint. Assembled in-house from high-quality components sourced domestically and internationally, it delivers reliable performance and value across demanding industrial services. A unified design with standardized face components makes the 1SV easy to maintain and simple to stock.
At a glance:
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Style: Single cartridge, stationary design (suited for high-speed applications)
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Sizes: 1″ to 2-7/8″ (ANSI). For larger sizes, see our Large Single Cartridge Seal
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Flush: 1 × 3/8″ NPT flush port standard for enhanced cooling and longer seal life
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Length: Short inboard axial length to simplify installation and reduce overhang
Why it lasts:
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Monolithic seal faces provide maximum face stability in high-pressure / high-temperature duty, extending service life
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Seal-face drive covers a large contact surface to minimize face damage in stop/start and viscous services
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Slotted anti-rotation gland with a wider, rounded slot improves durability under frequent cycling
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Hydraulically balanced faces reduce power consumption and heat generation
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Non-shaft-fretting sleeve elastomer plus positive set-screw drive protect the shaft and ensure secure torque transmission
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Multiple springs deliver even face loading with maximum axial movement compensation
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Double-lip metal spacer clips protect the assembly for perfect fitment and safe handling/shipping
Typical uses:
Pumps handling clean to moderately dirty liquids in chemical processing, power, pulp & paper, water/wastewater, mining, and general industrial services—especially where higher pressure/temperature, viscosity, or frequent starts/stops are expected.
Need help sizing or selecting materials? Contact us with your pump model and service details—we’ll spec the best 1SV build for your duty.