Process Transitions by Roto-Disc®

Full Range of Process Transitions for Original Equipment or Retrofit Powder Bulk Solid: Vessels, Valves, Screeners, Mixers and Piping

Have you ever been frustrated with process transition fabrication?

It seems easy, but material thickness, flange precision and overall lengths can all affect outcome. Many times the transition isn’t specified properly or the fabricator doesn’t understand the end result that is needed. Roto-Disc has taken all of the hassle out of precision standard transitions that install just as expected, right out of the box.

A process industry first from the “When-All-Else-Fails” valve company.

Now the power bulk engineering industry has a stock selection of process transitions for the installation of new or retrofit equipment. A complete range of square or round flange dimensions and diameters is available.

Flangeless transitions are also included.

Custom sizes, materials and surface finishes.

The following pages outline many sizes, material thicknesses and end types, but they’re only the start of our capacity to customize your specific process transition. Special dimensions, stainless steel and alloys materials, food-grade surface polishes, shot blast or polymer coatings can be added.

Standard dimensions are shown on the following charts. Custom weldments for particular space, angle and/or connection requirements also available.

Surface Finish Options

  • Polishing/Electro-polishing
  • Painting/Powder Coating
  • Hardfacing
  • Coatings, Platings
  • Bead blasting


Sanitary Clamp Ferrule Connections

RS-F-and-RF-F

* To indicate duty grade and material preference add the following to the end of each part number: 1) Duty Grade: L = Light; M = Medium; H = Heavy; 2) Material: 304 = CF8; 316 = CF8M; MST = Mild Steel

Part Number Example: RS-F-03-316 = ( Round Stub to Ferrule, 3”, 316 Stainless Steel )

RS-F

Round Stub to Ferrule

Part No A Min. B C D
RS-F-03-XXX 2.00” 2.870” #16ga (.0598”) 3.00”
RS-F-04-XXX 2.00” 3.834” #14ga (.0747”) 4.00”
RS-F-06-XXX 2.00” 5.782” #11ga (.1196”) 6.00”
RS-F-08-XXX 2.00” 7.782” #11ga (.1196”) 8.00”
RS-F-10-XXX 2.00” 9.732” #11ga (.1196”) 10.00”
RS-F-12-XXX 2.00” 11.732” #11ga (.1196”) 12.00”

RF-F

Round Flange to Ferrule

Part No. E F G H J
RF-F-03-XXX 7.50” 3” .75” 4 6.00”
RF-F-04-XXX 9.00” 4” .75” 8 7.50”
RF-F-06-XXX 11.00” 6” .75” 8 9.50”
RF-F-08-XXX 13.50” 8” .75” 8 11.75”
RF-F-10-XXX 16.00” 10” 1.00” 12 14.25”
RF-F-12-XXX 19.00” 12” 1.00” 12 17.00”


Round to Reduced Round Transition (RRR)

round to reduced round process transitions

* To indicate duty grade and material preference add the following to the end of each part number: 1) Duty Grade: L = Light; M = Medium; H = Heavy; 2) Material: 304 = CF8; 316 = CF8M; MST = Mild Steel

Part Number Example: RRR-SE-03-L-316 = (Round to Reduced Round, Stub End, 3”, Light Duty, 316 Stainless Steel)

RRR-SE

Round to Reduced Round, Stub Ends

Part No A Min. B C
RRR-SE-03-XXX 2.25” 3.00” 2.00”
RRR-SE-04-XXX 3.00” 4.00” 3.00”
RRR-SE-06-XXX 4.50” 6.00” 4.00”
RRR-SE-08-XXX 6.00” 8.00” 6.00”
RRR-SE-10-XXX 7.50” 10.00” 8.00”
RRR-SE-12-XXX 9.00” 12.00” 10.00”

RRR-SF

Round to Reduced Round, Small Flange

Part No. D E F G H
RRR-SF-03-XXX 6.00” 2” .75” 4 4.75”
RRR-SF-04-XXX 7.50” 3” .75” 4 6.00”
RRR-SF-06-XXX 9.00” 4” .75” 8 7.50”
RRR-SF-08-XXX 11.00” 6” .75” 8 9.50”
RRR-SF-10-XXX 13.50” 8” .75” 8 11.75”
RRR-SF-12-XXX 16.00” 10” 1.00” 12 14.25”

RRR-LF

Round to Reduced Round, Large Flange

Part No. J K L M N
RRR-LF-03-XXX 7.50” 3” .75” 4 6.00”
RRR-LF-04-XXX 9.00” 4” .75” 8 7.50”
RRR-LF-06-XXX 11.00” 6” .75” 8 9.50”
RRR-LF-08-XXX 13.50” 8” .75” 8 11.75”
RRR-LF-10-XXX 16.00” 10” 1.00” 12 14.25”
RRR-LF-12-XXX 19.00” 12” 1.00” 12 17.00”

RRR-BF

Both Flanges

Part No.
RRR-BF-03-XXX
RRR-BF-04-XXX
RRR-BF-06-XXX
RRR-BF-08-XXX
RRR-BF-10-XXX
RRR-BF-12-XXX

Material Thickness: Light: #14ga = .0747” Medium: #11ga = .1196” Heavy: #7ga = .1793”



Square to Reduced Square Transition (SRS)

square to reduced square process transition

* To indicate duty grade and material preference add the following to the end of each part number: 1) Duty Grade: L = Light; M = Medium; H = Heavy; 2) Material: 304 = CF8; 316 = CF8M; MST = Mild Steel

Part Number Example: SRS-SE-03-L-316 = (Square to Reduced Square, Stub End, 3”, Light Duty, 316 Stainless Steel)

SRS – SE

Square to Reduced Square, Stub Ends

Part No A Min. B C
SRS-SE-03-XXX 2.25” 3.00” 2.00”
SRS-SE-04-XXX 3.00” 4.00” 3.00”
SRS-SE-06-XXX 4.50” 6.00” 4.00”
SRS-SE-08-XXX 6.00” 8.00” 6.00
SRS-SE-10-XXX 7.50” 10.00” 8.00”
SRS-SE-12-XXX 9.00” 12.00” 10.00”

SRS-LF

Square to Reduced Square, Large Flange

Part No. D E F G
SRS-LF-03-XXX 6.00 2.62” .44” 8
SRS-LF-04-XXX 7.00” 3.12” .44” 8
SRS-LF-06-XXX 9.00” 4.00” .44” 8
SRS-LF-08-XXX 12.00” 3.62” .62” 12
SRS-LF-10-XXX 14.00” 4.25” .62” 12
SRS-LF-12-XXX 17.00” 5.12” .62” 12

SRS-SF

Square to Reduced Square, Small Flange

Part No. J K L M
SRS-SF-03-XXX 4.00” 1.62” .31” 8
SRS-SF-04-XXX 6.00” 2.62” .44” 8
SRS-SF-06-XXX 7.00” 3.12” .44” 8
SRS-SF-08-XXX 9.00” 4.00” .44” 8
SRS-SF-10-XXX 12.00” 3.62” .62” 12
SRS-SF-12-XXX 14.00” 4.25” .62” 12

SRS-BF

Both Flanges

Part No.
SRS-BF-03-XXX
SRS-BF-04-XXX
SRS-BF-06-XXX
SRS-BF-08-XXX
SRS-BF-10-XXX
SRS-BF-12-XXX

Material Thickness: Light: #14ga = .0747” Medium: #11ga = .1196” Heavy: #7ga = .1793”



Round to Reduced Square Transition (RRS)

round to reduced square process transition

* To indicate duty grade and material preference add the following to the end of each part number: 1) Duty Grade: L = Light; M = Medium; H = Heavy; 2) Material: 304 = CF8; 316 = CF8M; MST = Mild Steel

Part Number Example: RRS-SE-03-L-316 = (Round to Reduced Square, Stub End, 3”, Light Duty, 316 Stainless Steel)

RRS-SE

Round to Reduced Square, Stub Ends

Part No A Min. B C
RRS-SE-03-XXX 2.25” 2.00” 3.00”
RRS-SE-04-XXX 3.00” 3.00” 4.00”
RRS-SE-06-XXX 4.50” 4.00” 6.00”
RRS-SE-08-XXX 6.00” 6.00” 8.00”
RRS-SE-10-XXX 7.50” 8.00” 10.00”
RRS-SE-12-XXX 9.00” 10.00” 12.00”

RRS-RF

Round to Reduced Square, Round Flange

Part No. D E F G H
RRS-RF-03-XXX 7.50” 3” .75” 4 6.00”
RRS-RF-04-XXX 9.00” 4” .75” 8 7.50”
RRS-RF-06-XXX 11.00” 6” .75” 8 9.50”
RRS-RF-08-XXX 13.50” 8” .75” 8 11.75”
RRS-RF-10-XXX 16.00” 10” 1.00” 12 14.25”
RRS-RF-12-XXX 19.00” 12” 1.00” 12 17.00”

RRS-SF

Round to Reduced Square, Square Flange

Part No. J K L M
RRS-SF-03-XXX 4.00” 1.62” .31” 8
RRS-SF-04-XXX 6.00” 2.62” .44” 8
RRS-SF-06-XXX 9.00” 4.00” .44” 8
RRS-SF-08-XXX 12.00” 3.62” .44” 8
RRS-SF-10-XXX 14.00” 4.25” .62” 12
RRS-SF-12-XXX 17.00” 5.12” .62” 12

RRS-BF

Both Flanges

Part No.
RRS-BF-03-XXX
RRS-BF-04-XXX
RRS-BF-06-XXX
RRS-BF-08-XXX
RRS-BF-10-XXX
RRS-BF-12-XXX

Material Thickness: Light: #14ga = .0747” Medium: #11ga = .1196” Heavy: #7ga = .1793”



Square to Reduced Round Transition (SRR)

square to reduced round process transition

* To indicate duty grade and material preference add the following to the end of each part number: 1) Duty Grade: L = Light; M = Medium; H = Heavy; 2) Material: 304 = CF8; 316 = CF8M; MST = Mild Steel

Part Number Example: SRR-SE-03-L-316 = (Square to Reduced Round, Stub End, 3”, Light Duty, 316 Stainless Steel)

SRR – SE

Square to Reduced Round, Stub Ends

Part No A Min. B C
SRR-SE-03-XXX 2.25” 3.00” 2.00”
SRR-SE-04-XXX 3.00” 4.00” 3.00”
SRR-SE-06-XXX 4.50” 6.00” 4.00”
SRR-SE-08-XXX 6.00” 8.00” 6.00”
SRR-SE-10-XXX 7.50” 10.00” 8.00”
SRR-SE-12-XXX 9.00” 12.00” 10.00”

SRR-RF

Square to Reduced Round, Round Flange/Sq Flange

Part No. D E F G H
SRR-RF-03-XXX 6.00” 2” .75” 4 4.75”
SRR-RF-04-XXX 7.50” 3” .75” 4 6.00”
SRR-RF-06-XXX 9.00” 4” .75” 8 7.50”
SRR-RF-08-XXX 11.00” 6” .75” 8 9.50”
SRR-RF-10-XXX 13.50” 8” .75” 8 11.75”
SRR-RF-12-XXX 16.00” 10” 1.00” 12 14.25”

SRR-SF

Square to Reduced Round, Both Flanges

Part No. J K L M
SRR-SF-03-XXX 6.00” 2.62” .44” 4
SRR-SF-04-XXX 7.00” 3.12” .44” 8
SRR-SF-06-XXX 9.00” 4.00” .44” 8
SRR-SF-08-XXX 12.00” 3.62” .62” 12
SRR-SF-10-XXX 14.00” 4.25” .62” 12
SRR-SF-12-XXX 17.00” 5.12” .62” 12

SRR-BF

Both Flanges

Part No.
SRR-BF-03-XXX
SRR-BF-04-XXX
SRR-BF-06-XXX
SRR-BF-08-XXX
SRR-BF-10-XXX
SRR-BF-12-XXX

Material Thickness: Light: #14ga = .0747” Medium: #11ga = .1196” Heavy: #7ga = .1793”



Square to Round Transition (RS)

square to round process transition

* To indicate duty grade and material preference add the following to the end of each part number: 1) Duty Grade: L = Light; M = Medium; H = Heavy; 2) Material: 304 = CF8; 316 = CF8M; MST = Mild Steel

Part Number Example: RS-SE-03-L-316 = (Round to Square, Stub End, 3”, Light Duty, 316 Stainless Steel)

RS-SE

Round to Square, Stub Ends

Part No A Min. B C
RS-SE-03-XXX 2.25” 2.00” 2.00”
RS-SE-04-XXX 3.00” 3.00” 4.00”
RS-SE-06-XXX 4.50” 4.00” 6.00”
RS-SE-08-XXX 6.00” 6.00” 8.00”
RS-SE-10-XXX 7.50” 8.00” 10.00”
RS-SE-12-XXX 9.00” 10.00” 12.00”

RS-RF

Round to Square, Round Flange

Part No. D E F G H
RS-RF-03-XXX 7.50” 3” .75” 4 6.00”
RS-RF-04-XXX 9.00” 4” .75” 8 7.50”
RS-RF-06-XXX 11.00” 6” .75” 8 9.50”
RS-RF-08-XXX 13.50” 8” .75” 8 11.75”
RS-RF-10-XXX 16.00” 10” 1.00” 12 14.25”
RS-RF-12-XXX 19.00” 12” 1.00” 12 17.00”

RS-SF

Round to Square, Square Flange

Part No. J K L M
RS-SF-03-XXX 6.00” 2.62” .44” 8
RS-SF-04-XXX 7.00” 3.12” .44” 8
RS-SF-06-XXX 9.00” 4.00” .44” 8
RS-SF-08-XXX 12.00” 3.62” .62” 12
RS-SF-10-XXX 14.00” 4.25” .62” 12
RS-SF-12-XXX 17.00” 5.12” .62” 12

RS-BF

Both Flanges

Part No.
RS-BF-03-XXX
RS-BF-04-XXX
RS-BF-06-XXX
RS-BF-08-XXX
RS-BF-10-XXX
RS-BF-12-XXX

Material Thickness: Light: #14ga = .0747” Medium: #11ga = .1196” Heavy: #7ga = .1793”