Type HL Compression Couplings
Applications
Boss Process Type HL compression couplings are designed to create tight, leak-resistant connections throughout industrial vacuum tubing systems. Featuring a 6” coupling body and three-bolt construction, these couplings feature our proprietary “Eyelet” design for control of static build-up.
Manufactured from corrosion-resistant galvanized steel and supplied with zinc-plated Grade 5 bolts, Type HL couplings are available with a choice of gasket materials and optional gasket protectors to accommodate different application requirements.
Gasket Options
Black SBR Gasket: An abrasion-resistant gasket option for applications requiring durability at the connection point.
White NBR Gasket: An FDA- compliant gasket for use where contamination is a concern.
| STOCK NUMBER | COUPLING SIZE OD (in) | NUMBER OF BOLTS | GASKET COLOR | GASKET PROTECTOR |
|---|---|---|---|---|
| 50603-211310 | 2.125 | 3 Bolt | Black | N |
| 50603-211311 | 2.125 | 3 Bolt | Black | Y |
| 50603-211320 | 2.125 | 3 Bolt | White | N |
| 50603-211321 | 2.125 | 3 Bolt | White | Y |
| 50603-251310 | 2.500 | 3 Bolt | Black | N |
| 50603-251311 | 2.500 | 3 Bolt | Black | Y |
| 50603-251320 | 2.500 | 3 Bolt | White | N |
| 50603-251321 | 2.500 | 3 Bolt | White | Y |
| 50603-301310 | 3.000 | 3 Bolt | Black | N |
| 50603-301311 | 3.000 | 3 Bolt | Black | Y |
| 50603-301320 | 3.000 | 3 Bolt | White | N |
| 50603-301321 | 3.000 | 3 Bolt | White | Y |
| 50603-351310 | 3.500 | 3 Bolt | Black | N |
| 50603-351311 | 3.500 | 3 Bolt | Black | Y |
| 50603-351320 | 3.500 | 3 Bolt | White | N |
| 50603-351321 | 3.500 | 3 Bolt | White | Y |
| 50603-401310 | 4.000 | 3 Bolt | Black | N |
| 50603-401311 | 4.000 | 3 Bolt | Black | Y |
| 50603-401320 | 4.000 | 3 Bolt | White | N |
| 50603-401321 | 4.000 | 3 Bolt | White | Y |
| 50603-501310 | 5.000 | 3 Bolt | Black | N |
| 50603-501311 | 5.000 | 3 Bolt | Black | Y |
| 50603-501320 | 5.000 | 3 Bolt | White | N |
| 50603-501321 | 5.000 | 3 Bolt | White | Y |
| 50603-601310 | 6.000 | 3 Bolt | Black | N |
| 50603-601311 | 6.000 | 3 Bolt | Black | Y |
| 50603-601320 | 6.000 | 3 Bolt | White | N |
| 50603-601321 | 6.000 | 3 Bolt | White | Y |
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