"9000G Series" Rotary Union

9000G Series Rotary Union

Features and Benefits

• Superior Sealing Performance - Bellows Sealing System provides superior sealing performance throughout the wear life of the rotary union.
• Designed for Dirty Media applications - Debris in contaminated media will not be captured in the Bellows Sealing System, which reduces clogging.
• Maintenance Free - 9000G is maintenance free because thereis no rolling element bearing, therefore no lubrication is required.
• High Temperature Applications - Offers the same design as the standard 9000 Series, but utilizes carbon graphite bearings for high temperature applications.
• Ideal for High Temperatures - The thrust collar allows for thermal expansion, making this an ideal union for high temperature, general purpose applications.
• Flanged mounted units available.

9000G Series Rotary Union Mono Flow Diagram

Nominal Pipe Size

Shaft Thread (A)

Right Hand Thread

Left Hand Thread

Inlet Thread (B)

C

D

E

F

G

O

V

W

X

Y

Part No.

Desc.

Repair Cartridge

Part No.

Desc.

Repair Cartridge

1/4

1/4

480630C

R050P

481323C

480629C

L050P

481322C

1/4

4-3/8

1-3/4

1-1/8

2-9/16

1-1/16

-

1/4

5/8

-

-

3/8

3/8

480632C

R150P

481325C

480631C

L150P

481324C

3/8

4-3/8

1-3/4

1-1/8

2-9/16

1-1/16

-

3/8

11/16

-

-

1/2

1/2

480198C

R250P

481240C

480197C

L250P

481203C

1/2

5

2-3/8

1-1/2

2-3/4

1-1/4

-

1/2

15/16

-

-

3/4

3/4

480247C

R350P

481208C

480246C

L350P

481207C

3/4

5-1/2

2-1/2

1-5/8

3

1-7/16

-

3/4

1-3/32

-

-

1

1

430111C

R450P-8

471882C

430110C

L450P-8

471881C

1

6-1/8

3

1-3/4

3-3/8

1-3/4

-

1

1-11/32

-

-

1-1/4

1-1/4

440581C

R9550P

471665C

440580C

L9550P

471664C

1-1/4

9-1/16

3-3/4

2-1/16

4-13/16

2-3/16

5/8

1-1/4

1-11/16

6-7/8

2

1-1/2

1-1/2

440165C

R9650P

471575C

440164C

L9650P

471576C

1-1/2

9-11/16

4-1/8

2-3/16

5-1/4

2-3/16

5/8

1-1/2

1-15/16

7-3/8

2-1/4

2

2

440469C

R9750P

471716C

440468C

L9750P

471715C

2

11-3/4

5-7/8

2-7/16

6-7/16

2-5/8

5/8

2

2-9/16

8-9/16

2-3/4

2-1/2

2-1/2

440577C

R9850P

471718C

440576C

L9850P

471717C

2-1/2

15-3/8

7-1/8

3-1/2

7-3/16

3-3/8

-

2-1/2

3

-

-

3

3

440505C

R9950P

471720C

440540C

L9950P

471719C

3

15-3/4

7-1/8

3-7/8

8-5/16

3-7/8

-

3

3-5/8

-

-

9000G Series Rotary Union Dual Flow Diagram

9000G Series High Temperature Rotary Union Mono Flow Specifications

9000G Series High Temperature Rotary Union Dual Flow

9000G Series Rotary Union Performance Chart

Rotary Union Design

While rotating joints come in many shapes, sizes, and configurations, they always have the same four basic components: housing, a shaft, a bearing (or bearings) and a seal.

Mechanical Seal

The heart of the Rotary Union or rotary joint is the seal.

The seal prevents the medium (water, oil, air, etc) from leaking outside the Rotary Union while the Rotary Union is in operation.

Duff-Norton uses four basic types of mechanical seals in its Rotary Unions: 1) pusher-type end face mechanical seal, 2) non-pusher type end face mechanical seal, 3) lip seals and 4) o-ring seal. Rotary Unions may have more than one seal.

Bearing

The second most important part of the Rotary Union is the bearing. A Rotary Union may have only one bearing or multiple bearings.

Roller bearings, such as ball bearings and tapered roller bearings, or non-roller bearings, like graphite bearings and bronze bushings, 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.

Shaft

The shaft is the component that carries the medium through the Rotary Union into the drum or roll. In many cases, the shaft will turn with the drum or roll. In some cases, like in larger flanged rotary Unions, the shaft may be stationary while the housing rotates. The bearings and seal are typically assembled around the shaft.

Housing

The housing is the component that holds all of the other elements of the Rotary Union together. The housing has an inlet port, which is a threaded port to which the hose supplying the medium will be attached .

The Rotary Union 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 Rotary Unions, the housing is stationary. In larger Rotary Unions, the housing maybe bolted to the drum or roll using a flange. In these cases, the housing rotates at the same speed as the drum.