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Nuraseal Sealing Products  |  Filton® Rotary Union Products

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Rotary R.E.B. Union

(Sizes 1-1/2" to 6")

  

   

Note: (*) Rotates with the shaft.

 

1. Adaptor, s.g. iron   2. Bellows subassembly, brazed stainless steel/carbon

3. Gaskets   4. Body, s.g. iron   5. Seal ring, hardened stainless steel

6. Locking screws, h.t. steel   7. Locking ring - inner  

8. Ball bearings - shielded from the seal chamber   9. Locking ring - outer
10. Rotary spindle, steel

 

Model Shown

Type B.E.

 

Description

The rotary R.E.B. union is a self-contained, self-supporting rotary seal for the leak-proof transfer of fluids such as steam, water, air and oil to and from rotating machine shafts. The type of rotary seal fitted to this model is a Filton® Bellows Seal containing a flexible stainless steel bellows which is self-adjusting, eliminating the maintenance common with conventional packed glands. Rotary sealing is created by relative rotation between extremely flat sealing faces (see item #2 and #5 in diagram above) held in contact by the spring characteristics of the bellows combined with an additional sealing force created by the pressure of the fluid passing through the rotary union. The bearings fitted to the union are standard ball bearings which are supplied with the initial lubrication completed prior to shipping. A shield is fitted to the seal chamber side of the ball bearings.

 

Variations of the Stationary Adapter End

There are three variations available:

 

1) Type B.E. - Single Flow
A single flow union suitable for transferring fluid in to or out of rotating machines.

 

2) Type S.T. - Double Flow (Stationary Center Tube)
Fitted with an adapter suitable for double flow with a stationary center tube. This gives flow areas through the center tube and annulus. The center tube - provided only if ordered - is fixed to the union end by means of a screw thread (dimension “O”). Flow can pass in through the center tube and return through the annulus or be reversed. For steam applications, the center tube is curved to reach the condensate in the bottom of the cylinder. If the roll neck diameter to length ratio prevents the use of a curved tube, a syphon elbow can be specified instead. See the Accessory Section or contact us for more information about the options available.

 

3) Type R.S. - Double Flow (Rotary Center Tube)
Fitted with an adapter suitable for a rotating center tube which must be located and driven by the machine. The center tube - provided only if ordered - rotates in a carbon bush. Flow can pass in through the center tube with the return through the annulus or be reversed. The center tube “sealing” system allows for a slight internal leakage between the supply and return lines. If these fluids must not mix, alternate designs are available.

 

Other R.E.B. Links

• Description & Dimensions

• Model Numbers

• Part Identification

• Maximum Operating Recommendations

• Flow Capacity

• Installation Procedures

• Maintenance and Overhaul

• Lubrication

• Download R.E.B. Union Manual.pdf

 

Other Filton® Links

 Home

Filton® Main Menu

Intro to Rotary Unions

Typical Applications

Rotary Union Models

•  R.E. (1/4" to 1-1/4")

•  P.B. (1/2" to 1)"

•  C.B. (1/4" to 1-1/4")
High Temperature

•  R.E.B. (1-1/2" to 6")

•  C.B.N. (1-1/2" to 6")
High Temperature)

Other Models

Special Models

Special Connections

•  Screw Threads

•  Flanges

Accessories

•  Syphon Elbows

•  Flexible Hoses

Also Available from Filton®

Quick Selection Guide

Part Numbers & Cross References

About Filton Ltd.

Health and Safety  

 

 

Model Dimensions
 

NOMINAL

SIZE

ROTARY C.B.N. UNION - Model Dimensions

A (i)

B, N

C

D

E

F

G, P

H

I

O

Q

S (ii)

T

V

W

40 (1-1/2")

G.1-1/2"

G.1-1/2"

35

263

212

52

25

72

128

G.3/4"

14

25.4, f8

50

64

108

50 (2")

G.2"

G.2"

48

293

226

55

28

83

137

G.1"

19

31.8, f8

60

76

127

65 (2-1/2")

G.2-1/2"

G.2-1/2"

57

356

279

67

30

102

186

G.1-1/4"

25

40, f8

55

90

150

80 (3")

G.3"

G.3"

70

407

324

77

30

120

200

G.1-1/2"

25

45, f8

70

110

180

90 (3-1/2")

G.3-1/2"

G.4

82

518

406

95

40

130

250

G.2"

30

60, f8

60

140

240

100 (4")

G.4"

G.4"

95

518

406

95

40

130

250

G.2-1/2"

30

75, f8

60

140

240

125 (5")

Flanged (iii)

G.5"

115

688

543

115

45

167

325

G.3"

40

88, f8

70

192

290

150 (6")

Flanged (iii)

G.6"

140

688

543

115

45

167

325

G.3-1/2"

40

100, f8

70

192

290

  Notes: 

  (i) "G" is the designation for parallel pipe threads to BS.2779 and ISO 228/1.   

 (ii) The tolerance “f8” is to BS.EN 20286-2 and ISO 286-2.

(iii) Please contact us for more information about flanged dimensions.

 

 

   

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