SYPTcoupling,
1. SYPT coupliing is a non-lubricated, torsionally flexible coupling with no wearing parts.
Its angular, axial and radial flexibility comes from its polyurethane membrane.
It consists of only four components; two axially-split half flexible elements with apscrews and two hubs.
All versions are field adjustable to meet ISO, DIN and ANSI shaft spacing specifications of up to 250 mm
without the need of additional parts.
2. The flexible element
The unique two-piece, split-in-half flexible element allows replacement without disturbing the hubs or
connected equipment. A half element consists of a non-reinforced, polyurethane membrane chemically
bonded to two pre-formed and perforated steel shoes. It transmits torque in shear through
themembrane.
Patented stress relief notches found on the end of each membrane uniformly distribute shear stresses.
The polyurethane is formulated to withstand cyclic fatigue,common environmental conditions, and
industrial chemicals. Although not to be used as a torque limiting device, the membrane serves as a fuse
disconnecting the equipment in case of blockage or severe overload conditions. The steel shoes are
coated, not painted, for optimal resistance against oxidation and industrial chemicals (optional stainless
steel is available). Paired half elements are supplied factory weight matched to ensure standard balance
conform with ISO G16 and AGMA Class 8. Ambient temperature range -40°C to+93°C.
3. Hubs
In standard cast and steel, hubs are also available in stainless steel or with special surface treatment for
particular corrosion resistance. They can be used interchangeably with all versions for any given size.
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