美国Duff-Norton公司已有127年的历史，Duff-Norton公司成立于1883年，是世界上规模较大的生产各种精密旋转接头、蒸汽接头、虹吸管等产品的厂家。公司产品设计新颖，加工精良，性能可靠，不易泄漏，使用寿命长，维护方便，型号系列化。*应用于钢铁、造纸、冶金、印刷、机械等行业，在世界同行业中享有较高的声誉。
Duff-Norton
1.What is a Rotary Union?
A Rotary Union transfers media (water, steam, air, oil, Hydraulic fluid, etc) from a
stationary source
to rotating machinery, such as a drum or an indexing table.
2.How do I choose the best Rotary Union for my process?
Tell us about your process. We need to know:
1 Type of fluid or gas to be conveyed (Media).
2 Pressure (PSI).
3 Temperature (°F).
4 Speed (RPM).
5 Shaft connection (Thread size and type or flange size).
6 Flow rate of media (GPM).
7 Flow passage - mono flow or dual flow (if dual flow:
stationary or rotating siphon pipe or tube).
适用于多通道旋转接头
一、ROTARY JOINT > Series HPMC-HSMC
特性
High Pressure Or High Speed
Applications
Duff-Norton multi-port Rotary Unions are available in both high pressure (HPMC Series) and high speed (HSMC Series) configurations.
Pressures Up To 5,880 psi
HPMC Series Rotary Unions are designed for higher pressure, available with up to eight ports as standard and are suitable for use in low speed applications for pressures up to 5,880 psi.
Available Up To 4 Ports
HSMC Series Rotary Unions are available with up to four ports as standard
Speeds Up To 3,000 RPM HSMC
Series is perfect for low pressure applications, up to 175 psi with rotational
speeds up to 3,000 rpm.
No Cross Contamination
Feel free to run dissimilar fluids through
Duff-Norton Multi-Port Rotary Unions as each port is always inpidually sealed eliminating cross contamination between circuits.
使用条件
材质：不锈钢及铜结构
*高压力：400公斤
*高转速：3000转
*高温度：120度
介质：空气、水、液压油、热油
连接形式：发兰连接
通道：多通道
二、ROTARY JOINT > Series 1600
特性
Two Port Design
Features two ports for use in a wide variety of applications.
Corrosion Resistant
Nickel plated steel for corrosion resistance. Also available in all stainless steel and with a hardened ceramic shaft for higher speeds and longer life
Medium Speed & Medium
Pressure Capable
Offers the ability to use medium speed and pressure simultaneously.
No Cross Contamination
The 1600 Series can be used with two dissimilar fluids. All circuits are inpidually sealed eliminating cross contamination
使用条件
材质：不锈钢及铜结构
*高压力：200公斤
*高转速：1500转
*高温度：120度
介质：空气、水、液压油、热油
连接形式：螺纹连接
通道：多通道
三、ROTARY JOINT > Series 1650
特性
Two Port Design
Features two circuits for use in a wide variety of applications.
Corrosion Resistant
Nickel plated steel for corrosion resistance. Also available in all stainless steel and with a hardened ceramic shaft for higher speeds and longer life
Medium Speed & Medium
Pressure Capable
Offers the ability to use medium speed and pressure simultaneously.
No Cross Contamination
Can be used with two dissimilar fluids. All circuits are inpidually sealed to eliminate cross contamination
使用条件
材质：不锈钢及铜结构
*高压力：200公斤
*高转速：1500转
*高温度：120度
介质：空气、水、液压油、热油
连接形式：发兰连接
通道：多通道
四、ROTARY JOINT > Series COLD WWATER
材质：不锈钢及铜结构
*高压力：10公斤
*高转速：700转
*高温度：93度
介质：水
连接形式：螺纹连接
通道：多通道
Basic Design
While rotating joints come in many shapes, sizes, and configurations, they always have the same four basic components: a housing, a shaft, a bearing (or bearings) and a seal.
The heart of the rotating joint is the seal. The seal is the element that prevents the medium from leaking outside the joint while the joint is in operation. DuffNorton uses four basic types of mechanical seals in its Rotary Unions°: pusher-type end face mechanical seals, non-pusher type end face mechanical seals, lip seals, and o-ring seals. Joints may have more than one seal. The second most important part of the rotating joint is the bearing. A Rotary Union may have only one bearing or multiple bearings. Roller bearings (like ball bearings and tapered roller bearings) or nonroller bearings (like graphite bearings and bronze 4ushings) may be used in the Rotary Union. The "bearings are, always used to allow a part of the joint (either the shaft or the housing) to rotate. The shaft is the component that carries the medium through the joint into the drum or roll. In many cases, the shaft will turn with the drum or roll. In some cases, like in larger, flanged joints, the shaft may be stationary while the housing rotates. The bearings and seal are typically assembled around the shaft. The housing is the component that holds all of the other elements of the joint together. The housing has an inlet port, which is a threaded hole to which the hose supplying the medium will be attached. It may also have an outlet port, if the same joint is being used both to supply fluid to a roll and to remove fluid from the roll. In smaller joints, the housing is stationary. In larger joints, the housing maybe bolted (using a flange) to the drum or roll. In these cases, the housing rotates at the same speed as the drum.
