Catalogs >
John Crane >
Type 83

Type 83
4Pages

Catalog excerpts

TYPE 83 Separation Seal A – Housing B – Retainer E – Radial Spring F – Sleeve G – Axial Spring Product Description Performance Capabilities Normally supplied as a complete seal cartridge, unique inner and outer segments are specifically designed to prevent oil migration and minimize wear. Nitrogen is normally injected between the two segmented bushings effectively creating a pressure barrier between the bearing and DGS cavity. Advanced materials and design ensure minimal wear and promote long life. Unlike many contacting separation seals the Type 83 is designed to operate on cryogenically dry nitrogen. Low wear for longer life and improved reliability. Cartridge design for easy installation. Universal design independent of shaft rotation. Unique carbon bushing segment design with selfadjusting hydropads. Specially designed segments minimize the separation gas consumption. The Type 83 is a contacting carbon bushing designed to isolate the bearing oil from the dry gas seal cartridge. Operating Pressure Range: 3 to15 psig/0.2 to 1.0 bar g Normal Separation Gas Supply Pressure: 5 to 7 psi/0.3 to 0.5 bar Vibration Levels to API617 For alternative conditions, consult John Crane Engineering.

Open the catalog to page 1

TYPE 83 Separation Seal Required Installation and P&ID for Type 83 Separation Seal Seal Gas Inlet (Dry/Clean Process Gas) Primary Vent (To flare) Secondary Vent Buffer Gas Inlet Product Side Bearing Housing Typical arrangement with a Type 28XP Tandem Seal

Open the catalog to page 2

TYPE 83 Separation Seal Type 83 Leakage Rates 9.00 8.00 3 psi Exp 3 psi Guar Flow (scfm) Flow (sl/min) Flow (scfm) Flow (sl/min) Shaft Diamete r NOTE: Leakages are for a double seal cartridge as shown on page 2.

Open the catalog to page 3

Separation Seal Alternative materials are available, consult John Crane Engineering. Performance Recommendations Proper consideration must be given as to the possibility of explosive mixtures. Note: suitable for nitrogen with a dew point down to -90°C. Vibration levels within API 617. Bearing housing should be well drained. Bearing housing should not be pressurized. Consideration should be given to the secondary vent piping as not to cause an excessive back pressure. Oil exiting the bearing cavity directed at the separation seal should be noted at design. Alternative Applications The Type...

Open the catalog to page 4