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Pump Couplings

Product catalog summary

Overview
DODGE offers a range of couplings designed for various pump applications, including centrifugal and positive displacement pumps. The main types of couplings discussed are PARA-FLEX, D-FLEX, and GRID-LIGN, each offering specific advantages for different pump types.

Centrifugal Pumps

Definition: Constant pressure, steady flow.
Materials: Typically water or constant viscosity liquids.
Driver Equipment: Usually electric motors.
Design: Spacer couplings are used for easy access to pump components without moving connected units.
Input RPM: Reduced from motor speeds.
Flow: Steady.
Starting Conditions: Low pressure, low loads.
Sizing: Requires a 1.0 – 1.25 service factor.

Positive Displacement Pumps

Definition: Varying pressure, constant flow.
Materials: Gases, petroleum, slurries, food products, semi-solids, varying viscosity liquids.
Driver Equipment: Typically electric motors.
Input RPM: Reduced from motor speeds.
Design: Standard couplings used with motor reducer packages.
Flow: Steady.
Starting Conditions: Medium pressure, medium loads.
Types: Screw, Lobe, Vane, Gear, Circumferential Piston, Flexible Tube (Peristaltic).
Sizing: Requires a 1.5 service factor.

Coupling Types

PARA-FLEX: Elastomeric coupling with a five-year warranty, reinforced elements, and high misalignment capability.
D-FLEX: Economical elastomeric sleeve coupling for centrifugal pumps, available with various sleeve materials.
GRID-LIGN: Compact, power-dense coupling for higher torque applications, versatile for high and low-speed connections.

Technical Specifications

Detailed tables provide specifications for PARA-FLEX, D-FLEX, and GRID-LIGN couplings, including element size, max bore, max RPM, and torque ratings.

Additional Considerations

Misalignment: Better alignment extends life and reduces bearing forces.
Temperature Range: Limited by rubber seals and elastomeric elements.
Torque-Bore Capability: Important for space-limited operations.
Speed Capability: Decreases with increased diameter due to centrifugal forces.
Torsionally Soft: Cushions shock loads and vibration.
Installation and Maintenance: Considers cost, difficulty, and ease of maintenance and repair.

Catalog excerpts

tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:8.00pt "Arial", sans-serif; } .font1 { font:10.00pt "Arial", sans-serif; } .font2 { font:11.00pt "Arial", sans-serif; } .font3 { font:14.00pt "Arial", sans-serif; } .font4 { font:21.00pt "Arial", sans-serif; } .font5 { font:46.50pt "Times New Roman", serif; } COUPLINGS FOR PUMPS DODGE offers a broad range of couplings speciically engineered for today's varied pump applications. DODGE PARA-FLEX, D-FLEX, and GRID-LIGN couplings offer a superior solution for a wide variety of pumps, including centrifugal and positive displacement applications, among others. CENTRIFUGAL PUMPS Input RPM - Typically reduced from motor speeds Օ Flow - Steady Starting Conditions - Low pressure, low loads Օ Sizing - The low starting loads require a 1.0 - 1.25 service factor when sizing couplings Dթfinition - Constant pressure, steady flow Typical Materials - Water or constant viscosity liquids Օ Driver Equipment - Typically electric motors Design - Spacer couplings are used primarily in centrifugal pump applications. These couplings are designed for motor-pump installations where easy access to pump bearings, seals, and impellers is required without moving the connected units Pump Reducer Motor Coupling Motor ՗ Coupling -E3- Belt Drive Pump Reducer BALDOR

Open the catalog to page 1

tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:8.00pt "Arial", sans-serif; } .font1 { font:11.00pt "Arial", sans-serif; } .font2 { font:5.00pt "Trebuchet MS", sans-serif; } POSITIVE DISPLACEMENT PUMPS Dթfinition - Varying pressure, constant flow Typical Materials - gases, petroleum, slurries, food products, semi-solids, varying viscosity liquids Օ Driver Equipment - Typically electric motors Input RPM - Typically reduced from motor speeds Օ Design - Standard couplings are commonly used with motor reducer packages Speed - Operating speeds may also be achieved by using belt...

Open the catalog to page 2

tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:5.00pt "Arial", sans-serif; } .font1 { font:6.00pt "Arial", sans-serif; } .font2 { font:8.00pt "Arial", sans-serif; } .font3 { font:11.00pt "Arial", sans-serif; } .font4 { font:31.00pt "Arial", sans-serif; } .font5 { font:5.00pt "Trebuchet MS", sans-serif; } DODGE COUPLINGS COMPARISON CHART # ©o©o PARA-FLEX D-FLEX GRID-LIGN Best "<-*~ Worst Misalignment o o o Better alignment provides longer life and lowers the reaction forces imposed on bearings. In all situations, misalignment should be minimized as much as possible Tempթrature...

Open the catalog to page 4

Pump Couplings

Pump Couplings

Catalog excerpts

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