DUFF-NORTON

About DUFF-NORTON

Duff-Norton is a manufacturer of mechanical and hydraulic motion control products, with a history dating back to the late 19th century. The brand is known for its line of rotating joints and unions, which are used to transfer fluids or gases from a stationary supply to a rotating shaft. These products are commonly found in industrial applications such as paper mills, steel processing, and chemical plants, where continuous rotation and reliable sealing are required. The rotating joints are available in various configurations, including straight and elbow types, with single or multiple passages. They feature cast iron bodies and carbon graphite seals, which provide chemical resistance and self-lubricating properties. Maximum speed ratings for the units shown are typically 700 rpm, with some models rated at 600 rpm. Threaded rotating shaft sizes range from 1/4 inch to 2 inches, accommodating different flow rates and connection requirements. The joints are designed to handle gases and oils, among other media. 3G Electric supplies Duff-Norton rotating joints and unions as part of its industrial equipment portfolio. The product line includes plain cast iron models with one or two passages, suitable for a variety of fluid transfer tasks. These components are often used in maintenance, repair, and operations (MRO) contexts, where reliable performance and ease of replacement are important. The carbon graphite seals offer good wear resistance and can operate without external lubrication in many cases. The cast iron construction provides durability and resistance to corrosion in many industrial environments. 3G Electric supports the Duff-Norton line by offering these rotating joints and unions to customers worldwide. The company provides access to technical specifications, such as passage count, shaft size, seal material, and maximum speed, to help buyers select the appropriate model for their application. With a focus on industrial equipment, 3G Electric serves plant engineers, maintenance managers, and procurement specialists who require components that meet specific operational parameters. The Duff-Norton rotating joints are part of a broader range of motion control products, but the focus here is on the fluid transfer solutions that are essential for rotating equipment. By stocking these items, 3G Electric aims to reduce downtime and simplify the sourcing process for critical components. The availability of multiple configurations allows for matching to existing machinery without extensive modifications. Overall, Duff-Norton rotating joints and unions represent a practical solution for fluid and gas transfer in rotating systems, and 3G Electric provides a channel to acquire these components efficiently.

Common Applications

• Paper mills — Duff-Norton rotating joints transfer steam and condensate to and from dryer cans, with models rated up to 700 rpm and carbon graphite seals.
• Steel processing — Duff-Norton rotating unions handle cooling water to rotating rolls, using cast iron bodies and threaded shafts from 1/4" to 2".
• Chemical plants — Duff-Norton two-passage rotating joints supply and return thermal fluids to rotating equipment, with carbon graphite seals for chemical resistance.
• Oil and gas — Duff-Norton elbow-type rotating joints transfer oils and gases to rotating machinery, with a maximum speed of 600 rpm and dual passages.
• Textile manufacturing — Duff-Norton single-passage rotating joints distribute hot oil to heated rollers, with 1-1/4" threaded shafts and 700 rpm rating.
• Food processing — Duff-Norton rotating joints with carbon graphite seals transfer steam for cooking and cleaning, in cast iron construction for durability.