UN multi-reduction coupling DN32 to 500, model SK3 (1 pc)

The UN multi-reduction coupling DN32 to 500, model SK3 is a single-piece fitting designed to provide progressive reduction steps from a primary diameter of 32 mm up to a target diameter of 500 mm. Supplied as one unit, this coupling integrates several staged reductions into a compact component to simplify transitions in piping, conduit or duct runs where gradual diameter changes are required. The product is intended for use with fluid systems, HVAC installations and cable management applications that benefit from stepped reductions within one fitting.

Advantages

This coupling consolidates multiple reduction stages into a single fitting, reducing the number of joints and potential leak or failure points. Its stepped design facilitates smooth transitions between diameters and simplifies installation planning. Supplied as one piece, it reduces assembly time and the need to source multiple separate reducers. The model is compatible with typical plumbing, heating, ventilation and cable conduit practices where gradual diameter changes are needed.

Suitable for

• Progressive pipe diameter reduction in plumbing systems
• Staged transitions in HVAC ducting and ventilation conduits
• Cable management where bundle entry requires sequential diameter changes
• Temporary or permanent reductions in fluid distribution lines

Key specifications

• Primary (input) diameter: 32 mm
• Maximum (output) diameter: 500 mm
• Configuration: multi-step reduction in a single-piece coupling
• Typical applications: fluid routing, ventilation/hvac, cable routing
• Supply form: single unit (1 pc)

How to use

Select the coupling orientation that matches the required flow or cable direction and align the appropriate reduction step with the mating pipe or conduit. Ensure mating surfaces and seals are clean and free of debris before assembly. Connect each end using the appropriate joining method for the system (mechanical clamp, adhesive, solvent welding, threaded joint or flange connection) as required by the materials in use and applicable installation standards. Verify alignment and secure connections to prevent movement under operating conditions.

Usage recommendations

Confirm material compatibility between the coupling and the existing pipes or conduits, and follow local codes for pressure, temperature and support spacing. Where fluid tightness is required, use appropriate seals or gaskets and perform a pressure or leak test after installation. For cable routing, maintain bend radii and secure transitions to prevent mechanical strain on cables.