Style
What it is
Typical use
Stocked by
Tri-Clamp (Clamp)Most common · 3-A
Two grooved ferrules compressed against a gasket by a 360° clamp ring. Fast tear-down for CIP and changeovers. Service pressure 300-1500 PSI depending on clamp style and size.
Food & beverage, dairy, brewing, general sanitary — any line with frequent disassembly.
DixonWaylandVNEMaxPureMaxCore
Bevel SeatIDF / ISS · legacy dairy
Threaded-nut union with mating beveled male and female ferrules and a sanitary gasket. The pre-clamp industry standard; still dominant in older dairy plants.
Legacy dairy, some brewing, equipment retrofits where matching existing plant is required.
DixonWaylandVNE
I-Line / Q-LineCherry-Burrell
Interlocking ferrules with a positioning lug that prevents misassembly and ensures consistent gasket compression. Common in long-crimp sanitary installations.
Dairy, brewing, process plants built around Cherry-Burrell equipment.
DixonWaylandVNE
John PerryAcme-thread dairy
Acme-threaded union with a square-shoulder gasket recess. Higher pressure than bevel seat; found on older milk-processing and transfer systems.
Dairy, tanker / transport lines, equipment built pre-1990.
DixonWaylandVNE
Butt WeldPolished · unpolished
Fittings welded directly tube-to-tube with no mechanical seal. Maximum cleanability — no gasket traps — but requires breaking the weld for service. Polished to 20/32 Ra for hygienic runs.
Fixed process piping, CIP/SIP loops, biopharm, any line where teardown is rare.
DixonWaylandVNEMaxPureMaxCore
European: DIN · SMS · RJTMetric / British
European sanitary unions — DIN (German), SMS (Swedish), RJT (British dairy). Each has its own thread, seat geometry, and gasket profile. Critical for imported equipment.
European process equipment, overseas OEM integrations, multinational plants.
DixonWaylandVNE
ASME-BPEBiopharm · high-purity
Dimensional and surface-finish standard for bioprocess equipment. Tighter tolerances than 3-A, controlled sulfur for orbital welding, documented Ra, and full traceability per DT-3-1 / SF-2.4-1.
Pharmaceutical, biotech, personal care, cell & gene therapy — anywhere process validation is required.
DixonMaxPureMaxCore
Vacuum: KF / ISOLab & vacuum service
KF (small-bore quick-flange) and ISO (bolted flange) fittings for vacuum service, including rings, bellows, clamps, and weld fittings.
Vacuum pumping stations, lab process equipment, R&D and pilot lines.
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