Stepped shaft, balanced sinusoidal wave-spring, ‘O’-Ring mounted Mechanical Seal, similar to Type 1677, most commonly utilised in higher-pressure pump applications.
Vulcan Types 1677, 1677M and 1678 all have sinusoidal continuous wave-springs without joints or weld-spots, for maximum spring reliability.
Stocked as a standard assembly with “stepped-size down” Type 8 DIN LONG ‘O’-Ring seat with anti-rotation provision.
Limits are for guidance only. Product performance is dependent on materials and other operating conditions.
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