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AsepticDiaphragmValves
DiaphragmConstruction
CRANE ChemPharma, Saunders offers a full-range of
diaphragm selections engineered to meet the exacting
demands of the Pharmaceutical industry. PTFE, modified
PTFE, and elastomer types are available to suit individual
system requirements. The Life ScienceDiaphragmprogram
is under constant development as our design engineers
workingwithour rubberandpolymer technologistsstrive to
create improved solutions to the critical applications found
in thebio-pharmmarket.
ElastomerDiaphragms
TheCRANEChemPharma, Saundersdiaphragm isacomplex
design and not a simple injection molded part. Layers of
proprietaryblendedandcalendared (rolled into sheet form)
rubberisvulcanizedwithhighstrengthwovenreinforcement
and metal stud attachment to ensure maximum strength
anddurability.
Selectedelastomersmustbe suitable forbio-processmedia,
including cleaning agents and clean steam, capable of
withstanding the range of temperatures encountered in
typical applications and also have good flex and recovery
(resistance tocompression set)properties toperformduties
as both a static and dynamic seal. CRANE ChemPharma,
SaundersLifeScienceelastomerdiaphragmsusea threaded
compressor attachment for simple installation and reliable
performance.
PTFEDiaphragms
CRANE ChemPharma, Saunders Life Science PTFE
diaphragms are robust twopiece leaf type. Thisdesignuses
a wetted PTFE face backedwith a fabric reinforced rubber
diaphragm. This elastomer backing provides support for
the PTFE face and also the necessary resiliency to create a
positive seal. The performance of the elastomer backing
cushion is critical to successful performance of a PTFE-
faced diaphragm. PTFE-faced diaphragms use bayonet-
type compressor attachment to ensure reliable installation
without point loading the PTFE face for maximum sealing
performanceandcycle life.
