PUMP CONNECTORS

CRV Flex®

Reduces turbulence at the pump...measurably improves pump performance

Go to CRV Flex size charts and 3D CAD drawings

How it works

The CRV® Technology consists of a specially designed set of stationary vanes placed upstream of an elbow. The CRV imparts to the fluid a gyroscopic motion, which counteracts the elbow induced motion, enabling the fluid to negotiate the turn uniformly and exit with a flat velocity profile.

The CRV® Flex offers:

  • Guaranteed measurable improved pump performance
  • Reduced pump vibration and wear, maximizing pump operating life and helping reduce pump maintenance
  • Increased pump efficiency
  • Increased flow rate

Suction Diffuser vs. the Energy efficient CRV FLEX
Pressure drop is the resistance to flow as a liquid moves thru a pipe. It is caused by the viscous shear within the liquid and turbulence along pipe walls. The more the pressure drop the more energy is consumed to overcome it.

The CRV Flex is far more efficient compared to a suction diffuser!

Pressure Drop (Equivalent Feet of Pipe)
PIPE SIZE SUCTION DIFFUSER (TYPICAL) CRV FLEX* LONG R
ELBOW
SHORT R
ELBOW
2-1/2 17 ft 2.38 ft 3.29 ft 6.17
3-1/4 26 2.45 4.09 7.67
4-1/4 31 2.58 5.37 10.10
6-1/4 45 3.33 8.09 15.2
8-3/4 78 3.73 10.60 20.0

*Includes the pressure drop through the Flex!!

Double Suction Centrifugal Pump Test Results
Flow rate, head and efficiency are improved. The pumps power requirements are reduced.

Centrifugal Pump Test Results

Click the links below to jump to a particular product info table.

CRV Flex with 150# Plate Flanges for Connectors to a L.R. Elbow

Model No. Size OAL Permanent Offset Intermittent Offset Pressure at 70°F 3D Drawing
CRVL0200 2 9 .375" .125" 455 CAD
CRVL0250 2.5 9 .375" .125" 345 CAD
CRVL0300 3 9 .375" .125" 289 CAD
CRVL0400 4 9 .375" .125" 300 CAD
CRVL0500 5 11 .375" .125" 220 CAD
CRVL0600 6 11 .375" .125" 200 CAD
CRVL0800 8 12 .375" .125" 190 CAD
CRVL1000 10 13 .375" .125" 150 CAD
CRVL1200 12 14 .375" .125" 125 CAD
CRVL1400 14 14 .375" .125" 105 CAD

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CRV Flex with Groove End X 150# Plate Flange and Long Radius 90 Degree Elbow

Model No. Size A* B* Permanent Offset Intermittent Offset Pressure
at 70°F
3D Drawing
CRVL90GF0200 2 14.25 3.25 .375" .125" 455 CAD
CRVL90GF0250 2.5 15 4 .375" .125" 345 CAD
CRVL90GF0300 3 15.75 4.75 .375" .125" 289 CAD
CRVL90GF0400 4 17.25 6.25 .375" .125" 300 CAD
CRVL90GF0500 5 20.75 7.75 .375" .125" 220 CAD
CRVL90GF0600 6 22.25 9.25 .375" .125" 200 CAD
CRVL90GF0800 8 26.75 12.13 .375" .125" 190 CAD
CRVL90GF1000 10 30.75 15.25 .375" .125" 150 CAD
CRVL90GF1200 12 34.75 18.25 .375" .125" 125 CAD
CRVL90GF1400 14 37.75 21.25 .375" .125" 105 CAD

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CRV Flex with Groove End X 150# Plate Flange for Connecting to a S.R. Elbow

Model No. Size OAL Permanent Offset Intermittent Offset Pressure
at 70°F
3D Drawing
CRVSGF0200 2 11.75 .375" .125" 455 CAD
CRVSGF0250 2.5 11.75 .375" .125" 345 CAD
CRVSGF0300 3 11.75 .375" .125" 289 CAD
CRVSGF0400 4 11.75 .375" .125" 300 CAD
CRVSGF0500 5 13.50 .375" .125" 220 CAD
CRVSGF0600 6 13.50 .375" .125" 200 CAD
CRVSGF0800 8 15.25 .375" .125" 190 CAD
CRVSGF1000 10 16.25 .375" .125" 150 CAD
CRVSGF1200 12 17.25 .375" .125" 125 CAD
CRVSGF1400 14 17.25 .375" .125" 105 CAD

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CRV Flex with 150# Plate Flanges and Concentric Reducer for Connecting
to a S.R. Elbow

Model No. Size OAL Permanent Offset Intermittent Offset Pressure
at 70°F
3D Drawing
CRVSR2502 2.5 x 2 12.25 .375" .125" 345 CAD
CRVSR0302 3 x 2 12.25 .375" .125" 289 CAD
CRVSR0325 3 x 2.5 12.25 .375" .125" 289 CAD
CRVSR0402 4 x 2 12.75 .375" .125" 300 CAD
CRVSR0425 4 x 2.5 12.75 .375" .125" 300 CAD
CRVSR0403 4 x 3 12.75 .375" .125" 300 CAD
CRVSR0525 5 x 2.5 15.75 .375" .125" 220 CAD
CRVSR0503 5 x 3 15.75 .375" .125" 220 CAD
CRVSR0504 5 x 4 15.75 .375" .125" 220 CAD
CRVSR0603 6 x 3 16.25 .375" .125" 200 CAD
CRVSR0604 6 x 4 16.25 .375" .125" 200 CAD
CRVSR0605 6 x 5 16.25 .375" .125" 200 CAD
CRVSR0804 8 x 4 17.50 .375" .125" 190 CAD
CRVSR0805 8 x 5 17.50 .375" .125" 190 CAD
CRVSR0806 8 x 6 17.50 .375" .125" 190 CAD
CRVSR1006 10 x 6 19.50 .375" .125" 150 CAD
CRVSR1008 10 x 8 19.50 .375" .125" 150 CAD
CRVSR1210 12 x 10 21.50 .375" .125" 125 CAD

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CRV Flex with 150# Plate Flanges and Concentric Reducer for Connecting
to a L.R. Elbow

Model No. Size OAL Permanent Offset Intermittent Offset Pressure
at 70°F
3D Drawing
CRVLR2502 2.5 x 2 12.25 .375" .125" 345 CAD
CRVLR0302 3 x 2 12.25 .375" .125" 289 CAD
CRVLR0325 3 x 2.5 12.25 .375" .125" 289 CAD
CRVLR0402 4 x 2 12.75 .375" .125" 300 CAD
CRVLR0425 4 x 2.5 12.75 .375" .125" 300 CAD
CRVLR0403 4 x 3 12.75 .375" .125" 300 CAD
CRVLR0525 5 x 2.5 15.75 .375" .125" 220 CAD
CRVLR0503 5 x 3 15.75 .375" .125" 220 CAD
CRVLR0504 5 x 4 15.75 .375" .125" 220 CAD
CRVLR0603 6 x 3 16.25 .375" .125" 200 CAD
CRVLR0604 6 x 4 16.25 .375" .125" 200 CAD
CRVLR0605 6 x 5 16.25 .375" .125" 200 CAD
CRVLR0804 8 x 4 17.50 .375" .125" 190 CAD
CRVLR0805 8 x 5 17.50 .375" .125" 190 CAD
CRVLR0806 8 x 6 17.50 .375" .125" 190 CAD
CRVLR1006 10 x 6 19.50 .375" .125" 150 CAD
CRVLR1008 10 x 8 19.50 .375" .125" 150 CAD
CRVLR1210 12 x 10 21.50 .375" .125" 125 CAD

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CRV Flex with Groove End x 150# Plate Flange and Concentric Reducer
for Connecting to a L.R. Elbow to a L.R. Elbow

Model No. Size OAL Permanent Offset Intermittent Offset Pressure
at 70°F
3D Drawing
CRVLRGF2502 2.5 X 2 15 .375" .125" 345 CAD
CRVLRGF0302 3 x 2 15 .375" .125" 289 CAD
CRVLRGF0325 3 x 2.5 15 .375" .125" 289 CAD
CRVLRGF0402 4 x 2 15.5 .375" .125" 300 CAD
CRVLRGF0425 4 x 2.5 15.5 .375" .125" 300 CAD
CRVLRGF0403 4 x 3 15.5 .375" .125" 300 CAD
CRVLRGF0525 5 x 2.5 18.5 .375" .125" 220 CAD
CRVLRGF0503 5 x 3 18.5 .375" .125" 220 CAD
CRVLRGF0504 5 x 4 18.5 .375" .125" 220 CAD
CRVLRGF0603 6 x 3 19 .375" .125" 200 CAD
CRVLRGF0604 6 x 4 19 .375" .125" 200 CAD
CRVLRGF0605 6 x 5 19 .375" .125" 200 CAD
CRVLRGF0804 8 x 4 21 .375" .125" 190 CAD
CRVLRGF0805 8 x 5 21 .375" .125" 190 CAD
CRVLRGF0806 8 x 6 21 .375" .125" 190 CAD
CRVLRGF1006 10 x 6 23 .375" .125" 150 CAD
CRVLRGF1008 10 x 8 23 .375" .125" 150 CAD
CRVLRGF1210 12 x 10 25 .375" .125" 125 CAD

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CRV Flex with 150# Plate Flanges for Connecting to a S.R. Elbow

Model No. Size OAL Permanent Offset Intermittent Offset Pressure
at 70°F
3D Drawing
CRVS0200 2 9 .375" .125" 455 CAD
CRVS0250 2.5 9 .375" .125" 345 CAD
CRVS0300 3 9 .375" .125" 289 CAD
CRVS0400 4 9 .375" .125" 300 CAD
CRVS0500 5 11 .375" .125" 220 CAD
CRVS0600 6 11 .375" .125" 200 CAD
CRVS0800 8 12 .375" .125" 190 CAD
CRVS1000 10 13 .375" .125" 150 CAD
CRVS1200 12 14 .375" .125" 125 CAD
CRVS1400 14 14 .375" .125" 105 CAD

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CRV Flex with Groove End X 150# Plate Flange
and 90 Degree Reducing Elbow

Model No. Size A* B* Permanent Offset Intermittent Offset Pressure
at 70°F
3D Drawing
CRVL90RGF2502 2.5 X 2 15 4 .375" .125" 345 CAD
CRVL90RGF0302 3 X 2 15.75 4.75 .375" .125" 289 CAD
CRVL90RGF0325 3 X 2.5 15.75 4.75 .375" .125" 289 CAD
CRVL90RGF0402 4 X 2 17.25 6.25 .375" .125" 300 CAD
CRVL90RGF0425 4 X 2.5 17.25 6.25 .375" .125" 300 CAD
CRVL90RGF0403 4 X 3 17.25 6.25 .375" .125" 300 CAD
CRVL90RGF0525 5 X 2.5 20.75 7.75 .375" .125" 220 CAD
CRVL90RGF0503 5 X 3 20.75 7.75 .375" .125" 220 CAD
CRVL90RGF0504 5 X 4 20.75 7.75 .375" .125" 220 CAD
CRVL90RGF0603 6 X 3 22.25 9.25 .375" .125" 200 CAD
CRVL90RGF0604 6 X 4 22.25 9.25 .375" .125" 200 CAD
CRVL90RGF0605 6 X 5 22.25 9.25 .375" .125" 200 CAD
CRVL90RGF0804 8 X 4 26.75 12.25 .375" .125" 190 CAD
CRVL90RGF0805 8 X 5 26.75 12.25 .375" .125" 190 CAD
CRVL90RGF0806 8 X 6 26.75 12.25 .375" .125" 190 CAD
CRVL90RGF1006 10 X 6 30.75 15.25 .375" .125" 150 CAD
CRVL90RGF1008 10 X 8 30.75 15.25 .375" .125" 150 CAD
CRVL90RGF1210 12 X 10 34.75 18.25 .375" .125" 125 CAD

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CRV Flex with Groove End X 150# Plate Flange
for Connecting to a L.R. Elbow

Model No. Size OAL Permanent Offset Intermittent Offset Pressure
at 70°F
3D Drawing
CRVLGF0200 2 11.75 .375" .125" 455 CAD
CRVLGF0250 2.5 11.75 .375" .125" 345 CAD
CRVLGF0300 3 11.75 .375" .125" 289 CAD
CRVLGF0400 4 11.75 .375" .125" 300 CAD
CRVLGF0500 5 13.50 .375" .125" 220 CAD
CRVLGF0600 6 13.50 .375" .125" 200 CAD
CRVLGF0800 8 15.25 .375" .125" 190 CAD
CRVLGF1000 10 16.25 .375" .125" 150 CAD
CRVLGF1200 12 17.25 .375" .125" 125 CAD
CRVLGF1400 14 17.25 .375" .125" 105 CAD

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CRV Flex with 150# Plate Flanges and 90 Degree Reducing Elbow

Model No. Size A* B* Permanent Offset Intermittent Offset Pressure
at 70°F
3D Drawing
CRVL90R2502 2.5 x 2 12.25 4 .375" .125" 345 CAD
CRVL90R0302 3 x 2 13 4.75 .375" .125" 289 CAD
CRVL90R0325 3 x 2.5 13 4.75 .375" .125" 289 CAD
CRVL90R0402 4 x 2 14.5 6.25 .375" .125" 300 CAD
CRVL90R0425 4 x 2.5 14.5 6.25 .375" .125" 300 CAD
CRVL90R0403 4 x 3 14.5 6.25 .375" .125" 300 CAD
CRVL90R0525 5 x 2.5 18 7.75 .375" .125" 220 CAD
CRVL90R0503 5 x 3 18 7.75 .375" .125" 220 CAD
CRVL90R0504 5 x 4 18 7.75 .375" .125" 220 CAD
CRVL90R0603 6 x 3 19.5 9.25 .375" .125" 200 CAD
CRVL90R0604 6 x 4 19.5 9.25 .375" .125" 200 CAD
CRVL90R0605 6 x 5 19.5 9.25 .375" .125" 200 CAD
CRVL90R0804 8 x 4 23.25 12.25 .375" .125" 190 CAD
CRVL90R0805 8 x 5 23.25 12.25 .375" .125" 190 CAD
CRVL90R0806 8 x 6 23.25 12.25 .375" .125" 190 CAD
CRVL90R1006 10 x 6 27.25 15.25 .375" .125" 150 CAD
CRVL90R1008 10 x 8 27.25 15.25 .375" .125" 150 CAD
CRVL90R1210 12 x 10 31.25 18.25 .375" .125" 125 CAD

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CRV Flex with 150# Plate Flanges and
Short Radius 90 Degree Elbow

Model No. Size A* B* Permanent Offset Intermittent Offset Pressure
at 70°F
3D Drawing
CRVS900200 2 10.5 2.25 .375" .125" 455 CAD
CRVS900250 2.5 11 2.75 .375" .125" 345 CAD
CRVS900300 3 11.5 3.25 .375" .125" 289 CAD
CRVS900400 4 12.5 4.25 .375" .125" 300 CAD
CRVS900500 5 15.5 5.25 .375" .125" 220 CAD
CRVS900600 6 16.5 6.25 .375" .125" 200 CAD
CRVS900800 8 19.25 8.25 .375" .125" 190 CAD
CRVS901000 10 22.25 10.25 .375" .125" 150 CAD
CRVS901200 12 25.25 12.25 .375" .125" 125 CAD
CRVS901400 14 27.25 14.25 .375" .125" 105 CAD

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CRV Flex with Groove End x 150# Plate Flanges and
Short Radius 90 Degree Elbow

Model No. Size A* B* Permanent Offset Intermittent Offset Pressure
at 70°F
3D Drawing
CRVS90GF0200 2 13.25 2.25 .375" .125" 455 CAD
CRVS90GF0250 2.5 13.75 2.75 .375" .125" 345 CAD
CRVS90GF0300 3 14.25 3.25 .375" .125" 289 CAD
CRVS90GF0400 4 15.25 4.25 .375" .125" 300 CAD
CRVS90GF0500 5 18.25 5.25 .375" .125" 220 CAD
CRVS90GF0600 6 19.25 6.25 .375" .125" 200 CAD
CRVS90GF0800 8 22.75 8.25 .375" .125" 190 CAD
CRVS90GF1000 10 25.75 10.25 .375" .125" 150 CAD
CRVS90GF1200 12 28.75 12.25 .375" .125" 125 CAD
CRVS90GF1400 14 30.75 14.25 .375" .125" 105 CAD

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CRV Flex with 150# Plate Flanges and
Long Radius 90 Degree Elbow

Model No. Size A* B* Permanent Offset Intermittent Offset Pressure
at 70°F
3D Drawing
CRVL900200 2 11.5 3.25 .375" .125" 455 CAD
CRVL900250 2.5 12.25 4 .375" .125" 345 CAD
CRVL900300 3 13 4.75 .375" .125" 289 CAD
CRVL900400 4 14.5 6.25 .375" .125" 300 CAD
CRVL900500 5 18 7.75 .375" .125" 220 CAD
CRVL900600 6 19.5 9.25 .375" .125" 200 CAD
CRVL900800 8 23.25 12.25 .375" .125" 190 CAD
CRVL901000 10 27.25 15.25 .375" .125" 150 CAD
CRVL901200 12 31.25 18.25 .375" .125" 125 CAD
CRVL901400 14 34.25 21.25 .375" .125" 105 CAD

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CRV Flex with 150# Plate Flanges and
Long Radius 90 Degree Elbow

Model No. Size A* B* Permanent Offset Intermittent Offset Pressure
at 70°F
3D Drawing
CRVSRGF2502 2.5 x 2 15 .375" .125" 345 CAD
CRVSRGF0302 3 x 2 15 .375" .125" 289 CAD
CRVSRGF0325 3 x 2.5 15 .375" .125" 289 CAD
CRVSRGF0402 4 x 2 15.5 .375" .125" 300 CAD
CRVSRGF0425 4 x 2.5 15.5 .375" .125" 300 CAD
CRVSRGF0403 4 x 3 15.5 .375" .125" 300 CAD
CRVSRGF0525 5 x 2.5 18.5 .375" .125" 220 CAD
CRVSRGF0503 5 x 3 18.5 .375" .125" 220 CAD
CRVSRGF0504 5 x 4 18.5 .375" .125" 220 CAD
CRVSRGF0603 6 x 3 19 .375" .125" 200 CAD
CRVSRGF0604 6 x 4 19 .375" .125" 200 CAD
CRVSRGF0605 6 x 5 19 .375" .125" 200 CAD
CRVSRGF0804 8 x 4 21 .375" .125" 190 CAD
CRVSRGF0805 8 x 5 21 .375" .125" 190 CAD
CRVSRGF0806 8 x 6 21 .375" .125" 190 CAD
CRVSRGF1006 10 x 6 23 .375" .125" 150 CAD
CRVSRGF1008 10 x 8 23 .375" .125" 150 CAD
CRVSRGF1210 12 x 10 25 .375" .125" 125 CAD

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CRV Flex
Watch Video

CRV Schematic

CRV Pump Connector

CRV Dye Flow

Picture of dye flow
with and without CRV

For large industrial applications
please visit Cheng Fluid Systems website.