Duff-Norton, Rotary Unions, Mechanical Actuators, Screw Jacks, Linear Actuators, Ball Screw Actuators, Electromechanical Actuators, Machine Screw Actuators, Rollerscrews, SuperCylinder, Electric Cylinders

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Rotary Union - Duff-Norton manufactures rotary unions, rotary joints, rotating joints and offers a line of 32 series ranging up to 10,000 psi and up to 5000 RPM. Rotary Union® is Duff-Norton’s registered trademark for rotating joints. Rotating joints are used to transfer fluids from a stationary supply to a rotating component, i.e., a drum or roll. They are used in process industries like paper, printing, rubber and plastics, textile and chemical; on cranes, on machine tools and in a host of other applications. They are used to provide heating or cooling media like 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. Duff-Norton has traditionally served the markets where it supplies its general purpose joints, such as the rubber and plastics industries, and in the textile market it supplies its 8000T, a joint designed especially for the textile industry. The single largest user industry of rotating joints worldwide is the pulp and paper industry, which requires large quantities of joints for steam, water and hot oil. The steam applications (i.e., dryer cans) are most prevalent in paper mills.

GENERAL PURPOSE JOINTS

^{5000 Series General Purpose Stainless Steel Rotary Union®}

Designed to handle water, steam, hot oil and air.
Features all stainless steel construction and hardware for superior corrosion resistance.
Fluorocarbon o-rings and two precision bearings keep the 5000 Series seal faces perfectly aligned.
All sizes are available with three seal options and with the addition of an elbow, become dual flow.
The balanced mechanical seal design of the 5000 series allows for optimal operation with a wide variety of media.
Integrated cartridge design makes refurbishment fast and easy.

Operating Parameters
Max Water Pressure	750 psi	52 bar
Max Water Temp	300ºF	150ºC
Max Steam Pressure	120 psi	8.2 bar
Max Temp Steam	350 ºF	175 ºC
Max Hot Oil Pressure	100 psi	6.8 bar
Max Hot Oil Temp	395 ºF	200 ºC
Max RPM NPT	1000	1000
Max RPM MT	3600	3600
Max RPM Air	550	550

^{9000 Series General Purpose Rotary Union®}

Features a bellows-type seal to provide greater flexibility where equipment misalignment is inherent, and to resist seal hang-up in media contaminated with non-abrasive debris and suspensions.
All sizes over 1-1/4” have dual bearings for additional load support.
Available with either flanged or threaded shaft connections for greater mounting flexibility.
Available with ball bearings for higher speed or maintenance-free graphite bearings for higher temperature applications. (See 9000G under “Steam & Hot Oil” section)
Integrated cartridge design makes refurbishment fast and easy.
Models with BSP or ISO 288 threads are also available.

Operating Parameters
Max Water Pressure	250 psi	17 bar
Max Water Temp	375ºF	190ºC
Max Steam Pressure	150 psi	10.2 bar
Max Temp Steam	375 ºF	190 ºC
Max Hot Oil Pressure	100 psi	6.8 bar
Max Hot Oil Temp	375 ºF	190 ºC
Max RPM NPT	700	700
Max RPM MT	1500	1500

^{600 Series General Purpose Rotary Union®}

Offered with either axial (straight through) nickel plated housing or radial (90 degree) inlet with aluminum housing for maximum flexibility in hydraulic, pneumatic, or water applications.
Features nickel treated carbon steel construction for corrosion resistance. Stainless steel models are also available.
Available in sizes from 1/4" to 1" and suitable for speeds up to 1500 RPM.
This 600 Series is equipped with a GR seal that also allows bi-directional or swivel rotation.

Operating Parameters

Max Temp

250ºF

120ºC

Max RPM

1500

Max Pressure

	Axial Inlet Models		Radial Inlet Models
Size	psi	bar	psi	bar
1/4"	3625	250	1450	100
3/8"	3625	250	1450	100
1/2"	2175	150	1015	70
3/4"	1450	100	725	50
1"	1450	100	725	50

^{4000 Series Low Torque Rotary Union®}

Perfect choice for high speed applications.
Features a unique balanced seal for long life and low torque, and a double row ball bearing to absorb radial and thrust loads.
Features a stainless steel shaft, bronze housing and a primary seal of carbon graphite against ceramic to offer maximum life and durability.
Available in single or dual flow models.

Operating Parameters
Max Water Pressure	1000 psi	68 bar
Max Water Temp	200ºF	93ºC
Max Air Pressure	300 psi	20.4 bar
Max Hot Oil Pressure	1000 psi	68 bar
Max Hot Oil Temp	200 ºF	93 ºC
Max RPM NPT	700	700
Max RPM MT	1500	1500

^{300 Series Small Envelope Rotary Union®}

Ideal for higher speed air applications.
All steel parts are nickel treated for corrosion resistance in a wide variety of process fluids.
Small envelope dimensions make the 300 Series suitable for use in applications with space constraints.

Operating Parameters
Max Temp.	250ºF	120ºC
Max RPM	3500	3500
Max Air Pressure	117 psi	8 bar
Max Water Pressure	117 psi	8 bar

^{805 Series General Purpose Rotary Union®}

Suitable for a wide range of applications including air, hydraulic fluid, water, non-toxic gases and oil.
Offered standard with an aluminum housing and stainless steel shaft, but is also available in all stainless steel construction.
Single flow models are offered in sizes from 1/4" to 1", and dual flow from 1/2" to 1".
Two seal options are offered: E1 (standard) is carbon graphite against ceramic and can be used at pressures up to 435 psi (35 bar); and E2 which is stainless steel against ceramic and can be used at pressures up to 725 psi (50 bar).

Operating Parameters
Max Pressure	435 psi	30 bar
Max Temp	320ºF	160ºC
Max RPM	5000	5000

STEAM & HOT OIL JOINTS

^{8000 Series Steam & Series Hot Oil Rotary Union®}

Designed for operation in a variety of steam applications.
Available in sizes ranging from 1/2" to 4."
An anti-torque lug prevents rotation of the housing while in operation.
The special carbon graphite bearing is lubricated by the process fluid and requires no additional lubrication.
8000HO offer the same design features as the standard 8000 Series with a special high temperature seal ring for hot oil applications.
The stainless steel housing insert in the 8000T Series makes this joint a favorite in the textile industry.
Models with BSP or ISO 288 threads are also available.

Operating Parameters
Max Steam Pressure	175 psi	12 bar
Max Temp Steam	450ºF	232ºC
Max Hot Oil Pressure	100 psi	6.8 bar
Max Hot Oil Temp	600ºF	316ºC
Max RPM	600	600

^{8100 Series Rod Supported Rotary Union®}

Specially developed for pulp & paper dryer can applications.
Offers decades of proven technology in a simple, dependable design.
The 8100-RSQ is a great choice for other applications that utilize a rotating siphon such as calendars, chill rolls and rubber and plastic mills.
Compatible for use with many types of media including steam, condensate, brine, heat transfer oils and water.
The weight of the 8100 Series Rotary Union^® is supported externally, eliminating wear and lubrication requirements to bearing elements.
Dimensionally compatible with other rod-supported joints, there won’t be any need to modify your plumbing.

Operating Parameters
Compatible Media: Steam, Condensate, Brine, Heat Transfer Oils, Water
Speed	300 RPM
Tempreture	650ºF	343ºC
Pressure	250 psi	17.2 bar

^{9000G Series High Temperature Rotary Union®}

The unique design of the bellows type Rotary Union^® permits them to be used to introduce heating agents into rolls or cylinders in various types of machinery.
Offers the same design as the standard 9000 Series, but utilizes a carbon graphite bearing for high temperature applications.
Because there is no rolling element bearing, no lubrication is required, making the 9000G maintenance free.
The thrust collar allows for thermal expansion, making this an ideal union for high temperature, general purpose applications.

Operating Parameters
Max Water Pressure	250 psi	17 bar
Max Steam Pressure	175 psi	11.9 bar
Max Temp Steam	378ºF	192ºC
Max Hot Oil Pressure	100 psi	6.8 bar
Max Hot Oil Temp	600ºF	315ºC
Max RPM NPT	700	700

^{2000 Series Shock & Vibration Resistant Rotary Union®}

Designed with two ball bearings spaced to withstand radial and thrust loads
Compression springs in the 2000 Series provide even loading across the seal surfaces to maintain zero leakage even in low pressure applications.
Designed with an integral flange that allows repairs without removing the housing from the machine.
The flange attaches directly to the machine journal, providing inherently concentric mounting, minimizing overhang, and partially relieving bearing load to increase service life.

Operating Parameters
Max Water Pressure	150 psi	10.2 bar
Max Water Temp	375ºF	190ºC
Max Hot Oil Pressure	100 psi	6.8 bar
Max Hot Oil Temp*	550 ºF	290 ºC
Max Air Pressure	100 psi	6.8 bar
Max RPM	500	500
*Consult our factory for applications exceeding 375ºF

MULTIPORT JOINTS

^{HPMC & HSMC Series MultiPort Rotary Unions®}

Duff-Norton multi-circuit Rotary Unions® are available in both high pressure (HPMC Series) and high speed (HSMC Series) configurations.
Series HPMC Rotary Unions® are designed for higher pressure requirements, available with up to eight ports as standard and are suitable for use in low speed applications for pressures up to 5880 psi (400 bar). Each passage is sealed to restrict leakage between ports. Special configurations are available upon request
Series HSMC Rotary Unions® are available with up to four ports as standard.
Series HSMC is perfect for low pressure applications, up to 175 psi (12 bar) with rotational speeds up to 3,000 rpm.
Feel free to run dissimilar fluids through Duff-Norton Multiport Rotary Unions® as each port is always individually sealed eliminating “crosstalk” between circuits.

Operating Parameters
HSMC
Max Pressure	170 psi	12 bar
Max Temp	248ºF	120ºC
Max RPM	3000	3000
Standard Ports	2 to 4 Ports
HPMC
Max Pressure	5880 psi	400 bar
Max Temp	248ºF	120ºC
Max RPM	180	180
Standard Ports	2 to 8 Ports

^{1600 Series Two Port Rotary Union®}

Features two circuits for use in a wide variety of applications.
Offers the ability to use medium speed and pressure simultaneously.
Comes standard with nickel plating, but is also available in all stainless steel and with a hardened ceramic shaft for higher speed and longer life.
Available in sizes from ¼ ” to 1,” our 1600 Series offers a threaded connection.
Feel free to use two dissimilar fluids, as all circuits are individually sealed eliminating “crosstalk.”

Operating Parameters
Max Pressure	2900 psi	200 bar
Max Temp	250ºF	120ºC
Max RPM	1500	1500

^{1650 Series Two Port Rotary Union®}

Features two circuits for use in a wide variety of applications.
Offers the ability to use medium speed and pressure simultaneously.
Comes standard with nickel plating, but is also available in all stainless steel and with a hardened ceramic shaft.
Available in sizes from ¼ ” to 1,” our 1650 Series offers a flanged connection.
Feel free to use two dissimilar fluids, as all circuits are individually sealed eliminating “crosstalk.”

Operating Parameters
Max Pressure	2900 psi	200 bar
Max Temp	250ºF	120ºC
Max RPM	1500	1500

SWIVEL JOINTS

^{1100 Series Slow Rotation/Swivel Rotary Union®}

Threaded swivel joints for use in applications where complete rotation is not necessary. Designed for swiveling or slow rotation applications.
Available in sizes from 1/4" to 3" and can be used at pressures up to 725 psi (50 bar).
This series has a GR seal and is available with axial (straight through) flow, or radial flow with the addition of a 90° stainless steel elbow.
Features nickel treated carbon steel construction. Stainless steel models are also available.

Operating Parameters

Max Temp

392ºF

200ºC

Max RPM

	Standard Materials		Stainless Steel
Size	psi	bar	psi	bar
1/4"	725	50	290	20
3/8"	725	50	290	20
1/2"	725	50	290	20
3/4"	725	50	290	20
1"	435	30	218	15
1 1/4"	435	30	218	15
1 1/2"	435	30	218	15
2"	290	20	145	10
2 1/2"	290	20	145	10
3"	290	20	145	10

^{1102 Series Slow Rotation/Swivel Rotary Union®}

Threaded swivel joints for use in applications where complete rotation is not necessary. Designed for swiveling or slow rotation applications.
Available in sizes from 1/4" to 6," and can be used at pressures up to 1160 psi (80 bar).
This series has a GR seal and is available with axial (straight through) flow, or radial flow with the addition of a 90° stainless steel elbow.
Features nickel treated carbon steel construction. Stainless steel models are also available.
Our 1102 Series offers two ball bearings which allow for increased pressure and speed.

Operating Parameters

Max Temp

392ºF

200ºC

Max RPM

	Standard Materials		Stainless Steel
Size	psi	bar	psi	bar
1/4"	1160	80	435	30
3/8"	1160	80	435	30
1/2"	1160	80	435	30
3/4"	870	60	360	25
1"	870	60	360	25
1 1/4"	580	40	290	20
1 1/2"	580	40	290	20
2"	435	30	215	15
2 1/2"	435	30	215	15
3"	435	30	215	15
4"	290	20	145	10
5"	290	20	145	10
6"	215	15	115	8

^{1200 & 1400 Series Small Envelope Slow Rotation Rotary Unions®}

Perfect for very small envelope dimensions and slow or swiveling rotation.
Our 1200 Series features a female NPT inlet and a male NPT shaft at 90 degrees in a compact form.
Our 1400 Series is available with a male shaft and either a male or female inlet.
Our 1400 Series is available in commonly used straight or tapered thread forms, including SAE, NPT, JIC, DIN or ISO
Both the 1200 & 1400 Series are nickel treated as standard and are also available in stainless steel.

Operating Parameters

Max Temp

392ºF

200ºC

	Std. Materials		Stainless Steel
Size	psi	bar	psi	bar
1/4"	5075	350	2530	175
3/8"	5075	350	2530	175
1/2"	4350	300	2175	150
3/4"	4350	300	2175	150
1"	3625	250	1810	125
1 1/4"	3625	250	1810	125
1 1/2"	2900	200	1450	100
2	2900	200	1450	100

^{1300 Series Flanged Swivel Rotary Union®}

Range in size from 2" through 12".
Used in applications where slow rotation or swiveling motion is needed.
Suitable for use at pressures up to 290 psi.
Standard models feature nickel treated carbon steel construction, but are also available with a stainless steel shaft.
Design features include a ball bearing for rotation, and a GR seal.
Can be used in applications with temperatures up to 392° F (200° C)

Operating Parameters
Max Pressure	290 psi	20 bar
Max Temp	392ºF	200ºC
Max Speed	12	12

^{1700 Series High Pressure Rotary Union®}

High pressure Rotary Union^® for use in hydraulic and pneumatic applications.
Equipped with a GR seal suitable for most transfer fluids.
Designed for use in medium to high pressure applications (to 5075 psi)
The high pressure capability of this series is obtained with the use of a Single Acting Thrust Bearing which permits slow rotation.

Operating Parameters
Max Pressure	5075 psi	350 bar
Max Temp	248ºF	120ºC
Max RPM	80	80

1900 Series High Pressure Rotary Union®

High pressure Rotary Union^® for use in hydraulic and pneumatic applications.
Equipped with a GR seal suitable for most transfer fluids.
Standard models feature nickel treated carbon steel construction, but are also available in all stainless steel.
Designed for use in very high pressure applications (to 10,150 psi)
Equipped with a Double Acting Thrust Bearing and a Bronze Bushing. The bearing permits higher pressure, while the bushing increases the guide of the shaft to allow faster rotating speeds than our 1700 Series.

Operating Parameters
Max Pressure	10,150 psi	700 bar
Max Temp	248ºF	120ºC
Max RPM	100	100

SPECIALTY JOINTS

^{500 Series Around the Shaft Rotary Union®}

Used in conjunction with the customer’s shaft and retaining sleeve.
Available in two configurations for high speed, low pressure applications, or high pressure, low speed applications.
Standard models feature nickel treated carbon steel construction in sizes from 20 mm to 100 mm.
Also available in stainless steel.
High pressure, low speed units can be used at pressures to 5800 psi and speeds less than 100 RPM. The high speed, low pressure models can be used at speeds to 3000 RPM, and pressures to 175 psi.

1500 Series Rotary Union® for Continuous Casting Equipment

Designed for use on continuous casting machines in steel mills.
Can operate at speeds of 100 rpm and pressures of 148 psi simultaneously
Available in both single or dual flow, with a bronze or nickel plated housing.
Each series is equipped with a brass bushing to ensure smooth shaft rotation at high temperatures.
Offered in four basic types, as described in detail in our product specifications.


Duff-Norton manufactures Mechanical Actuators (Screw Jacks), Electromechanical Linear Actuators, Electric Cylinders and Rotating Joints. Since 1883, Duff-Norton has earned a reputation for reliable, high quality products meeting the industrial lifting, positioning, and transfer needs of our worldwide customers and has been ISO 9001 registered since 1994.
Copyright© 2006-2007 Columbus McKinnon Corporation.