Duff-Norton rotary unions

Hydraulic systems & components

4th Quarter 2015 Hydraulic systems & components

Duff-Norton’s new range of DWPA rotary unions transfer media such as water, steam, air, oil or hydraulic fluid from a stationary source to a rotating machine such as a drum or indexing table. They are used in process industries such as paper, printing, rubber, plastics, textiles and chemicals. Rotary unions are also used on cranes and machine tools and in many other applications. They deliver moderate heating or cooling media such as steam, hot oil, water or coolant to control the surface temperature of a drum or roll, to transfer air or hydraulic fluid to moving components or to add fluids to mixers while in motion.

DWPA rotary unions can be used with media that do not corrode aluminium and are compatible with nitrile rubber. Fitted with a stainless steel rotor, they boast silicon carbide/carbon graphite seal faces to give extended service life. High precision ball bearings ensure smooth running and long life, even at high operating speeds. The internal bearing protection and vented body prevent lubricant wash-out. To ease starting, the DWPA can safely be run dry for a short period. Replaceable cartridges facilitate maintenance. The pipe plugs at the end of the rotary unions can be replaced with special elbows available from Duff Norton. This allows for the installation of either stationary or rotating siphon pipes for dual flow applications. Duff Norton supplies rotary unions in operational ranges to handle up to 14 bar and 1750 rpm. They are lab tested for quality and carry a one year warranty against defective materials or workmanship.

For more information contact Kevin Hoy, Yale Engineering Products, +27 (0)11 794 2910, kevin@yalejhb.co.za, www.yalejhb.co.za

Share this article:

Hydraulic connectors with residual pressure
Editor's Choice Hydraulic systems & components
Hydraulic connections are vital in both outdoor and indoor industrial machinery. However, the hydraulics lines frequently require connecting and disconnecting for maintenance or changeover. The goal is to enable quick, easy swaps to enhance machine flexibility and productivity.

Read more...

Sun carries the load
Axiom Hydraulics Hydraulic systems & components
When valuable lives are hoisted in the air, reliable load holding technology is at its utmost importance. That’s why you can count on Sun’s excellent load holding cartridge valves.

Read more...

How to protect against water hammer
SA Gauge Editor's Choice Hydraulic systems & components
Water hammer is a high-pressure surge or wave created by the kinetic energy of moving fluid when it is rapidly forced to stop or change direction, altering the liquid’s velocity. The progression of the water hammer shockwave needs to be detained and slowed before reaching the instrument sensor. SA Gauge manufactures several such devices in order to achieve this.

Read more...

Axiom ups its game
Axiom Hydraulics Editor's Choice Hydraulic systems & components
In today’s competitive market, manufacturers of hydraulic components are constantly challenged to find better, faster and cheaper ways of producing parts. Axiom Hydraulics has met the challenge, and can now deliver a product with superior performance and significant cost savings for its customers.

Read more...

Condition monitoring for critical hydraulic equipment
Hydrasales Hydraulic systems & components
Systems maintenance personnel often classify equipment as critical, based solely on its value. Instead, critical equipment should be determined by its importance to the operation and the objectives of the organisation.

Read more...

Hydraulic bolt tensioning
Bearing Man Group T/A BMG Hydraulic systems & components
BMG’s Nord-Lock bolting solutions include Boltight hydraulic bolt tensioning tools, which can be used to tighten bolts simultaneously, ensuring even preload in industrial applications and extreme environments, ...

Read more...

How to get the best of both worlds with hydraulics and electric
Editor's Choice Hydraulic systems & components
While battery technologies continue to evolve and overcome challenges that have previously restricted more rapid electrification adoption rates, hybrid electric systems are well positioned as an ideal interim solution.

Read more...

Create and recover energy all in one check valve
Axiom Hydraulics Hydraulic systems & components
Energen is a new, high-efficiency check valve from Sun Hydraulics that allows free flow from inlet to outlet, and blocks flow in the opposite direction. Composed of an integrated generator that converts ...

Read more...

Categories

Hydraulic systems & components

Duff-Norton rotary unions

Further reading:

Publications by Technews