Multiport Rotary Unions, Standard and Specialist Materials
Multiport Rotary Unions also known as a Multiport Swivels offer fixed input to rotating output connections. The main purpose is to allow multiple flows across a common rotational axis. Popular systems for using Multiport Rotary Unions include hydraulics, pneumatics, water, cables, vacuums, coolants or gases. Bespoke designs are available to meet your exact requirements. Ports are able to exit radially or Axially. Pressures can be suitable up to 1379 Bar (20,000 PSI). Heavy duty bearings to support external loads. Leak detection ports are also available. Finally mounting flanges or brackets can be fixed to match your requirements.
EWFM Specialise in Swivel Joints, Loading and Unloading Arms, Couplings, Breakaway Couplings, Filling and Emptying Equipment, Hose, Agitators and Mixers, Access Systems, Storage Tank Equipment and Aircraft and Helicopter Equipment for the Oil & Gas, Food and Drink, Chemical, Pharmaceutical, Power Generation and the Defensive and Aviation Industries.
At the onset, aircraft refuelling and fuel tanker equipment have been and continue to be a specialty of EWFM in both the defence and civil markets. From supplying to the aviation and oil and gas industries, the company has now diversified into other hazardous markets such as pharmaceutical, chemical, food and drink and power generation.
EWFM’s product expertise ensures that customers are recommended the most suitable equipment for their application. Having supplied many thousands of our products, our reputation as a reliable company is known both worldwide and in the UK.
Procedures in place ensure that all projects are carried out with utmost professionalism, offering clients support at all stages.
Accredited to ISO 9001-2008, we have never received either a major or minor non-conformance after 25 third party audits.
The most important thing to remember with our Multiport Rotary Unions is that they are made to order. We have produced many weird and extravagant looking ones over our time (some can be seen in the gallery to the left). So please send us your requirements and we should be able to produce you a solution.
Materials
Built to order from 316L Stainless Steel, Carbon Steel or any other material as application requires. (please request)
End Connections
- BSPP, BSPT, NPT threaded connections.
- SAE, ASME, PN flange connections.
- Others are also available on request.
Individually designed for specific applications
- Subsea systems
- Hose reels
- Winch systems
- Plant and machinery
- Machine tools
- Umbilical hose lines
Models: High Pressure
What are Rotary Joints & Rotary Unions?
A rotary joint, also referred to as a rotary union or rotating union, is a rotary sealing device that connects rotating equipment to fixed piping for the transfer of steam, water, thermal oil, coolant, hydraulic oil, air, and other media. Rotary unions can be designed with multiple passages and manage multiple media types simultaneously. In these cases, a soft seal such as an O-ring is used to prevent the fluids from “crossing-over” into another passage. Soft seal multi-passage rotary unions are used in a variety of industries and applications including oil and gas, food and beverage, aerospace, robotics, and medical devices. In some applications, the rotary union is fitted with slip rings for transmitting electrical signals as well as hydraulic power.
With conventional rotary joints, a spring-loaded seal is used to keep the fluid or gas medium from being dispersed into the atmosphere. The spring is used in the rotary joint to maintain the initial internal seating, and the rotary joint is pressure-sealed once in operation. Low-pressure or vacuum service relies on the spring force to create the seal. Conventional rotary joints are either self-supported with the use of an internal carbon guide, or external-supported using rods or a mounting bracket.
Balanced seal rotary unions are generally used with fluid service (e.g. water, coolant, etc.), but can be used with steam and other gases. Balanced seal technology relies on optimizing the spring pressure to create a positive seal within the rotary union. The operating pressure of the media has little, if any, effect on the seal load. Balanced seals are typically flat face seals and the rotary unions are supported by ball bearings.
The seals are the main wearing components of a rotary joint and rotary union. During operation, seals can experience internal loading forces from fluid pressure, as well as friction from contact between the sealing faces. Factors related to the machine speed, temperature, and media used can also affect the life of the seal ring. To a large extent, a rotary union is only as good as its seal package. Poor quality seals naturally wear out more rapidly, leading to an increase in maintenance, downtime, and repair cost. When a seal fails, media escapes and the efficiency of the entire heating or cooling process suffers. All of this makes the actual replacement cost of the seal just a small portion of the total cost of a seal failure.
Source: kadant.com
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