Airflex AA2 Single Passage Rotorseals

Product Information

Product Name: Airflex by Danfoss Rotorseals RS
9010

Manufacturer: Danfoss

Model: RS 9010

Description: The Airflex single passage
rotorseal is a positive seal rotary union (rotary joint). It
permits the transfer of gases or liquids, under pressure, into or
out of the exposed end of a rotating shaft. The rotorseal operates
continuously or intermittently up to rated speeds in either
direction. The rotorseal features an inlet port with various pipe
thread sizes depending on the model. Ball bearings are used between
the stationary and rotating parts for smooth operation. The
rotorseals are lubricated for life at the factory to provide long,
maintenance-free service.

Product Usage Instructions

Installation

1. Inspect the internal thread form in the mounting shaft to
   ensure there is no damage to the threads.
2. Verify that the proper diameter and depth of the mounting shaft
   conform to the specifications mentioned in Table 3.
3. Thread the rotorseal onto the mounting shaft securely.

Warnings and Cautions

• Always forward this manual to the person responsible for
  installation, operation, and maintenance of the product to prevent
  personal injury or equipment damage due to faulty installation,
  operation, or maintenance.
• Use only genuine Airflex replacement parts to ensure optimal
  product performance and to avoid voiding the warranty.

Table 1: Rotorseal Parts Description

Table 2: Inlet Port Pipe Tap Sizes

Figure 1: Rotorseal Components

Note: Consult the factory when using Airflex rotorseals with
mediums other than air.

Installation Guide
Airflex by Danfoss
Rotorseals

RS 9010

Installation, Operation and Maintenance of Airflex® Model AA2, B2, B3 and C2 Rotorseals

Warning
Forward this manual to the person responsible for Installation, Operation and Maintenance of the product described herein. Without access to this information, faulty Installation, Operation or Maintenance may result in personal injury or equipment damage.

Caution:
Use Only Genuine Airflex Replacement Parts
The Airflex Division of Danfoss recommends the use of genuine Airflex replacement parts. The use of non-genuine Airflex replacement parts could result in substandard product performance, and may void your warranty. For optimum performance, contact Airflex.

AN458379499868en-000101

TYPE AA2, B3, & C2

ITEM 1 2 3 4 5 6

FIGURE 1

DESCRIPTION HOUSING
COPPER GASKET SHAFT SPRING
SPRING STOP GROMMET

TABLE 1 ITEM 7 8 9 9A 10 11

DESCRIPTION CARBON SEAL SNAP RING (SHAFT)
BEARING BEARING COLLAR SNAP RING (HOUSING)

RS 9010 PDF Format

1

(Revised September 1998)

1.0 INTRODUCTION

Throughout this manual there are a number

of HAZARD WARNINGS that must be read

and adhered to in order to prevent possible

personal injury and/or damage to the equipment.

Three signal w ords “DANGER” , ” WARNING” ,

and ” CAUTION” are used to indicate the

severity of the hazard, and are preceded by the

safety alert symbol

.

Denotes the most serious injury hazard, and is used when serious injury or death WILL result from misuse or failure to follow specific instructions.

Used when serious injury or death MAY result from misuse or failure to follow specific instructions.

Used when injury or product/equipment damage may result from misuse or failure to follow specific instructions.

It is the responsibility and the duty of all personnel involved in the installation, operation and maintenance of the equipment on w hich this device is used to fully understand the

,

, and

procedures by w hich hazards are to be

avoided.

1.1 Description
1.1.1 The Airflex single passage rotorseal is a positive seal rotary union (rotary joint). The rotorseal permits the transfer of gases or liquids, under pressure, into or out of the exposed end of a rotating shaft. The rotorseal operates continuously or intermittently up to rated speeds in either direction.

The factory must be consulted when contemplating the use of Airflex rotorseals with mediums other than air.

1.1.2 Ball bearings are used betw een the stationary and rotating parts. The rotorseals are lubricated for life at the factory to give long, maintenance-free service.
1.1.3 The rotorseal housing (1) features an inlet port w ith the American National pipe thread size show n on Table 2.

Rotorseal Size AA2 B 3 C2

TABLE 2

Inlet Port Pipe Tap 1/8 NPT * 3/8 NPT 1/2 NPT

* B3 rotorseal is furnished w ith an adapter, having 1/4 NPT internal threads and is a direct replacement for the discontinued B2 rotorseal.

1.2 How It Works
1.2.1 The sealing betw een the stationary housing (1) of the rotorseal and the carbon seal ring (7), occurs at the lapped seal face of the rotating shaft (3). A light coil spring (4) keeps the carbon seal ring in place assuring a positive seal betw een the components. See Figure 1.

2.0 INSTALLATION

2.1 Preparation

2.1.1 The Airflex rotorseals have threaded shafts for direct and easy mounting to the shaft or assembly. Inspect the internal thread form in the mounting shaft to insure that there is no damage to the threads. Insure that the proper diameter and depth conform w ith Table 3 specif icat ions.
2.1.2 A good pipe thread sealant should be applied to the outside thread on the rotorseal shaft before mounting.

2.2 Air connection

2.2.1 The rotorseal housing has an American National Pipe Thread air inlet as show n in Table 2. This connection to the rotorseal should alw ays be through a flexible hose. Refer to Figure 2 for examples of mounting assemblies.

RS 9010 PDF Format

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(Revised September 1998)

Figure 3

Figure 2

The use of a rigid air connection will tend to preload the rotorseal bearing. This will result in poor bearing life, and/or bearing failure.
2.2.2 Connect the flexible hose to the rotorseal inlet. A good pipe thread sealant should be used at this joint.
This first installation step is necessary to avoid damage to the rotorseal bearing and seals.
2.2.3 Install the copper gasket (2) over the threaded portion of the rotorseal shaft. This gasket must be seated against the inside face of the shaf t . Apply a good pipe thread sealant to the thread on the rotorseal shaft. Thread this assembly into the shaft mounting. Refer to Table 3.

The maximum chamfer allowed at
the hole location on the shaft mounting is .06x45o. Wide chamfers at this
interface prevent the gasket from
sealing and should be avoided.

Rotorseal Size
AA2 B3 C2

TABLE 3

Hex Size

Straight Mounting Thread

0.625

3/8-24

0.875

5/8-18

1.375

1-14

Thread Depth
0.75 0.75 1.00

2.2.4 A union type connection to the supply line completes the installation. See Figure 3. All supply piping must be self supporting.
3.0 OPERATION

3.1 Temperature
3.1.1 The rotorseal operating temperature is dependent upon the sealing ” O” ring rubber compounds and/or the type of ball bearings used in their design.
3.1.1.1 The AA2, B3, and C2 rotorseals have a maximum operating temperature of 220oF (104oC).
3.2 Pressure and Speed Limits
3.2.1 Airflex rotorseals are designed w ith low internal friction for cool operation, even at rated speeds. Specific models of this product are offered for standard and high pressure operating applications. See Table 4.
3.2.2 Maximum rotorseal pressure and speed limits are show n on Table 4.

Type AA2 B3 C2

TABLE 4

Description Part Number Max. RPM

Standard
High pressure
Standard High
pressure
Standard
High pressure

145631E 145631T 145106BQ 145106BV 145107BG 145107BK

4000 1000 4000 600 3000 400

Max. Pressure psi
150 1000
150 1000
150 1000

RS 9010 PDF Format

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(Revised September 1998)

The operation of Airflex rotorseals at maximum air pressure combined with maximum speed should be avoided. Consult the factory for details of specific application data.
4.0 MAINTENANCE

Prior to performing any maintenance on the rotorseal, make sure the equipment is in, and will remain in, a safe condition.

4.1 Wear Limits

4.1.1 The Airflex rotorseals are lubricated for life and require no maintenance. If a rotorseal has become ineffective after prolonged service, it can be restored to good operating condition by rebuilding it.

4.2 Rebuilding

4.2.1 A replacement kit is available to allow the rebuilding of these rotorseals in the field. Airflex rotorseals are manufactured of quality materials w hich are held to precision tolerances. NOTE: Only genuine Airflex rotorseal parts should be used. The rotorseal should be removed from its mounting and repairs should be made in a clean, dust-free environment.

4.2.2 Disassembly

4.2.3 Remove the snap ring (11). This can be done w ith the aid of snap ring pliers. Insert the pins of the pliers into the holes in the snap ring. Compress the ring enough to insure that the groove in the housing (1) w ill not be damaged, and remove the snap ring.

4.2.4 Refer to Figure 1 for bearing arrangement. Remove shaft (3) and bearing (9) and/or (9A) from the housing (1) by holding the hex portion of the shaft in a vise w hile striking the housing gently w ith a light mallet. Rotate the housing w hile striking to reduce the tendency of binding the bearing in the housing.

4.2.5

Remove the spring (4), spring stop (5), ” O” ring (6), and seal (7) from the housing (1) w ith the aid of a small w ire hook.

4.3 CLEANING AND INSPECTION
4.3.1 Clean all the parts thoroughly after disassembly w ith a grease cutting solvent.

The manufacturer of any grease cutting solvent publishes a Material Safety Data Sheet. This sheet must be read and understood before using the product.

4.3.2 Inspect the lapped sealing end of the shaft (3). This sealing surface should be free of scoring and excessive w ear.

4.3.2.1

Inspect the bearings (9)(9A) for roughness, end play and contamination. They should be in good condition, free of rust, and should revolve smoothly w ithout any tendency to bind.

4.3.3 If the shaft (3) or the bearings (9)(9A) are in poor condition, they must be replaced. If these tw o parts require disassembly, remove the shaft external snap ring (8) and press the bearings from the shaft.

4.3.4 Inspect the housing (1) for damage from the outer race of the bearings (9)(9A) rotating. Replace the housing if necessary.

Only genuine Airflex rotorseal parts should be used (Bearings or shaft can be obtained from the factory separately).

4.4 ASSEMBLY

4.4.1 Assemble the spring (4), spring stop (5), ” O” ring (6), and seal (7) as show n in Figure 1, making sure the ” O” ring seats properly on the chamfered surface of the seal.

4.4.1.1

Re-pack grease cavity in the housing (1) of rotorseals w ith Alvania #2 Oil grease or equivalent. All unsealed bearings must be packed (refer to parts list).

Failure to follow this lubrication procedure may result in rotorseal damage or failure.

RS 9010 PDF Format

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(Revised September 1998)

4.4.1.2

Note the proper orientation of the seal or shield if applicable and assemble bearings (9) and/or (9A) onto the shaft (3). Refer to Figure 1. On the older styles of B3 and C2 rotorseals, the collar (10) must be on the shaft before the bearing is pressed on. Replace the shaft external snap ring (8) into the shaft groove to lock the bearing into place.

4.4.1.3

Assemble shaft and bearings into housing (1). Enter the bearings evenly in the housing to prevent binding. Press end of shaft gently until the outer race is against the housing shoulder.

4.4.1.4

Replace the snap ring (11) in the housing groove to retain the assembly. Check the shaft rotation for smooth operation. There must be no bind.

5.0 ORDERING INFORMATION/ TECHNICAL ASSISTANCE

5.1 In any correspondence regarding Airflex Equipment, refer to the Part Number show n on the housing.

6.0 PARTS LIST

Rotorseal Size

A2

B3

C2

Basic Assembly

145631E 145106BQ 145107BG

Item

Description

1

Housing

303375 415628

415631

2 Copper Gasket

82×9

82×10

82×11

3

Shaft

201346 415627 415630

4

Spring

201204

8347

9479

5

Spring Stop

200919

8346

9480

6

” O” Ring

73×190

73×14

73×10

7

Carbon Seal

201347

8344

9482

8

Snap Ring

118×9

139×74

139×20

9

Bearing

159×68 159×204 159×203

9A

Bearing

159×31 159×204 159×21

11

Snap ring

138×8

138×66

138×10

Replacement Kit

Kit Number

145631X 145106X 145107X

Included in Kit

4

Spring

201204

8347

9479

5

Spring Stop

200919

8346

9480

6

” O” Ring

73×190

73×14

73×10

7

Carbon Seal

201347

8344

9482

Shaft Replacement Kit

Kit Number

N/A

145106ZZ 145107ZZ

3

Shaft

N/A

415628 415630

8

Snap Ring

N/A

139×74

139×20

11

Snap Ring

N/A

138×66

138×10

RS 9010 PDF Format

5

(Revised September 1998)

· Cartridge valves
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valves
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support and training
· Position controls and
sensors
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systems
· Telematics

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References

• Daikin Sauer Danfoss - Home
• Engineering Tomorrow | Danfoss
• Hydro-Gear Drivetrain Solutions | Home