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    The DI Type coupling has a “Drop-In” spacer assembly that is assembled at the factory. The coupling consists of two hubs and a spacer assembly comprising of the spacer, two unitized disc packs, and two guard rings. The disc packs are bolted to the spacer and guard rings at the factory using the torque values recommended by Lovejoy for the disc pack bolts. With the hubs mounted on the shafts, the entire disc pack assembly can be “Dropped In” place between the two hubs. The hubs are piloted to ensure proper centering of the spacer assembly. This piloting serves as an anti-flail feature and aids in the coupling’s ability to meet the balance standards mandated by API. This style coupling is designed to meet the balance and anti-flail requirements specified in API-610.

    Oversized, or Jumbo, hubs are available for use with the DI Type coupling to allow for larger bore sizes on most DI coupling sizes. This allows for the use of smaller DI couplings in applications where a smaller size coupling can still accommodate the application torque.
Unit of Measure

Specifications

Description 

 N/A DI255-6-SUBASSY-BSE=9"

Hub Style

 N/A Standard

Type

 N/A Disc

Style

 N/A Spacer Assembly

Color

 N/A Metallic

Coupling Series

 N/A DI-6

Coupling Type

 N/A Drop in Spacer Assembly

Weight

 N/A 49.00 lb

Weight (Complete Coupling w/ Max. Bores)

 N/A 159.00 lb72.00 Kg

Dimensional Data

Height

 N/A 10.350 in

Between Shaft Ends

 N/A 9.00 in

Width

 N/A 10.350 in

Cubic inches

 N/A 964.10250 in³

Dimensional Data of Related Coupling

Coupling Size

 N/A 255-6

Length thru Bore

 N/A 4.530 in115.06 mm

Outside Diameter

 N/A 6.890 in175.00 mm

Overall Length

 N/A 18.060 in458.724 mm

Max. Bore (Dimensions ID)

 N/A 4.940 in125 mm

Flange Diameter (Dimension FD)

 N/A 10.350 in263.00 mm

Dimension PW

 N/A 9.000 in228.60 mm

Dimension S

 N/A 5.510 in140.00 mm

Distance between Shaft Ends (Dimension BSE)

 N/A 9.000 in228.60 mm

Performance Data of Related Coupling

Temperature 

 N/A -40 to 450 ºF

Nominal Torque

 N/A 10200.00 in·lb

Max. Torque

 N/A 180600.00 in·lb20400.00 N·m

Max. Speed (Unbalanced)

 N/A 3080.00 rpm

Max. Speed (Balanced)

 N/A 7700.00 rpm

Axial Misalignment (∆ Ka)

 N/A 0.185 in4.70 mm

Max. Angular Misalignment

 N/A 1.00 º

Torsional Stiffness x 106

 N/A 41.00 in·lb/rad4.70 Nm/rad

Rated Power at 100 rpm

 N/A 143.20 hp106.80 kW

Features

Features 

 N/A
  • Designed to meet the API 610 Standard
  • Support for additional API requirements available on request
  • Unitized disc pack
  • Infinite life if properly aligned
  • Torsionally rigid without any back lash
  • No need for lubrication or maintenance
  • No wearing parts and high resistance to harsh environmental conditions