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John Crane has launched the Saflex H pump seal which, it claims, has been designed to meet specific demands of the chemical and pharmaceutical industries.
It is targeted at applications that require stringent standards of sterility and hygiene. Its high level of operational reliability promotes continuous production runs and keeps expensive down time to an absolute minimum, claims the company. It can be sterilized in place, while its clean-in-place functionality greatly speeds changes between production runs.
The seal's ultra-clean profile complements the cartridge design which eliminates contamination traps. The roll-formed bellows core has a twin-ply design that further enhances cleanliness and ensures maximum compatibility with different applications.
These bellows enclose the main shrunk-fit seal face and this eliminates the need for the traditional O-rings or other additional components that often become contaminant traps.
The seal can also handle pressures that range from a vacuum up to 1.6 MPa (16 bar) and, says John Crane, it can easily cope with harsh operating conditions. Designed to operate with equal efficiency and reliability in both abrasive and viscous environments, the seal faces are available in carbon, silicon carbide and a silicon carbide/graphite composite material.
Satisfying US Food and Drug Administration standards, all of the component materials are recognized for use worldwide. The seal is available in sizes that are compatible with most key industry rotating equipment.
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