HL Series couplings feature galvanized steel construction for pneumatic conveying systems. Zinc-plated grade 8 bolts and zinc-plated grade 8 flange nuts reduce the need for washers. The advanced eyelet design improves conductivity, and lighter-weight construction facilitates easier handling. Sizes span 1.50" OD up to 8.00" OD.
Pressure Capabilities for Dense- and Dilute-Phase SystemsThese galvanized compression couplings handle static pressures from 30 PSI to 160 PSI, making them suitable for dense- and dilute-phase conveying. The 3- and 4-bolt galvanized steel coupling configurations are available to match your system specifications.
Configuration Options and Gasket MaterialsHL Series couplings are available in 3- and 4-bolt configurations. Standard gasket options include FDA-compliant white NBR or black SBR rubber. Stainless steel gasket protectors are available. High-temperature silicone gaskets, chemical-resistant Viton gaskets, and T304 stainless steel construction are available by special order.
- Standard Features
- 3 and 4 bolt configurations
- Sizes: 1.50” up to 8.00” tubing
- Galvanized steel construction
- Zinc plated grade 8 bolts
- Zinc plated grade 8 flange nuts (no washer needed)
- White NBR FDA compliant or black SBR rubber gaskets
- Available with stainless steel gasket protectors
- Advanced “Eyelet” design improves conductivity
- Lighter weight for ease of handling
- Flanged nuts reduce installation time
- Optional Features
- Stainless steel gasket protectors
- T304 stainless construction by special order
- High temp silicon gaskets
- Chemical resistant viton gaskets
- Literature Downloads
- Size & Pricing Chart
* GP = Gasket Protector
Part Number Size (OD) Bolts Gasket GP Price 50603-151310 1.50" OD 3 Black No $17.38 50603-151311 1.50" OD 3 Black Yes $20.70 50603-151320 1.50" OD 3 White No $18.96 50603-151321 1.50" OD 3 White Yes $22.27 50603-181310 1.75" OD 3 Black No $17.69 50603-181311 1.75" OD 3 Black Yes $21.00 50603-181320 1.75" OD 3 White No $22.12 50603-181321 1.75" OD 3 White Yes $21.74 50603-201310 2.00" OD 3 Black No $17.85 50603-201311 2.00" OD 3 Black Yes $21.32 50603-201320 2.00" OD 3 White No $19.59 50603-201321 2.00" OD 3 White Yes $23.07 50603-211310 2.125" OD 3 Black No $18.01 50603-211311 2.125" OD 3 Black Yes $21.48 50603-211320 2.125" OD 3 White No $19.75 50603-211321 2.125" OD 3 White Yes $23.22 50603-225310 2.25" OD 3 Black No $18.16 50603-225311 2.25" OD 3 Black Yes $20.73 50603-231310 2.375" OD 3 Black No $18.16 50603-231311 2.375" OD 3 Black Yes $21.64 50603-231320 2.375" OD 3 White No $19.91 50603-231321 2.375" OD 3 White Yes $23.38 50603-251310 2.50" OD 3 Black No $18.33 50603-251311 2.50" OD 3 Black Yes $21.79 50603-251320 2.50" OD 3 White No $20.23 50603-251321 2.50" OD 3 White Yes $23.69 50603-301310 3.00" OD 3 Black No $19.28 50603-301311 3.00" OD 3 Black Yes $22.90 50603-301320 3.00" OD 3 White No $21.79 50603-301321 3.00" OD 3 White Yes $25.44 50603-301410 3.00" OD 4 Black No $28.12 50603-301411 3.00" OD 4 Black Yes $31.75 50603-301420 3.00" OD 4 White No $30.02 50603-301421 3.00" OD 4 White Yes $33.65 50603-351310 3.50" OD 3 Black No $20.54 50603-351311 3.50" OD 3 Black Yes $24.33 50603-351320 3.50" OD 3 White No $23.69 50603-351321 3.50" OD 3 White Yes $27.48 50603-351410 3.50" OD 4 Black No $30.02 50603-351411 3.50" OD 4 Black Yes $33.81 50603-351420 3.50" OD 4 White No $33.17 50603-351421 3.50" OD 4 White Yes $36.96 50603-401310 4.00" OD 3 Black No $22.12 50603-401311 3.00" OD 4 Black Yes $26.06 50603-401320 3.00" OD 4 White No $25.28 50603-401321 3.00" OD 4 White Yes $29.23 50603-401410 4.00" OD 4 Black No $33.17 50603-401411 4.00" OD 4 Black Yes $37.13 50603-401420 4.00" OD 4 White No $36.33 50603-401421 4.00" OD 4 White Yes $40.28 50603-501310 5.00" OD 3 Black No $28.43 50603-501311 5.00" OD 3 Black Yes $32.55 50603-501320 5.00" OD 3 White No $31.60 50603-501321 5.00" OD 3 White Yes $35.70 50603-501410 5.00" OD 4 Black No $44.23 50603-501411 6.00" OD 4 Black Yes $48.35 50603-501420 5.00" OD 4 White No $47.40 50603-501421 5.00" OD 4 White Yes $51.50 50603-601310 6.00" OD 3 White No $37.91 50603-601311 6.00" OD 3 Black Yes $42.34 50603-601320 6.00" OD 3 White No $41.07 50603-601321 6.00" OD 3 White Yes $45.50 50603-601410 6.00" OD 4 Black No $47.40 50603-601411 6.00" OD 4 Black Yes $51.81 50603-601421 6.00" OD 4 White Yes $54.98 50603-601420 6.00" OD 4 White Yes $50.55 50603-801310 8.00" OD 3 Black No $60.03 50603-801311 8.00" OD 3 Black Yes $64.92 50603-801320 8.00" OD 3 White No $63.18 50603-801321 8.00" OD 3 White Yes $68.09 50603-801410 8.00" OD 4 Black No $69.51 50603-801411 8.00" OD 4 Black Yes $74.40 50603-801420 8.00" OD 4 White No $72.67 50603-801421 8.00" OD 4 White Yes $77.56 50603-225320 2.25" OD 3 White No $19.91 50603-225321 2.25" OD 3 White Yes $22.46
Order Direct from Boss Process
Boss Process supplies HL Series couplings that are competitively priced and readily in stock for direct purchase without distributor delays. Flange nuts can help reduce installation time. Boss Process maintains inventory to support quick availability.
Contact our team for pricing, or explore our selection of stainless steel couplings for lower-pressure applications.
