Engineered for transitioning between two different tubing outer diameters across enclosure partitions and machine bulkheads, Pioneer Industries Brass Double Ferrule Bulkhead Reducers provide robust panel clamping and hermetic twin-ferrule sealing up to 5,000 PSI.
The Brass Double Ferrule Bulkhead Reducer is a specialized panel pass-through fitting designed to connect two different tubing outer diameters through a structural partition or enclosure wall. It combines an extended threaded mounting barrel and dual jam nuts with two different tube-size sockets on opposite sides.
In process instrumentation panels, main distribution supply lines often use larger tubing (such as 1/2″ or 12mm), while internal cabinet signal lines require smaller tubing (such as 1/4″ or 6mm). This bulkhead reducer performs the diameter reduction and panel mounting simultaneously in one leak-free component.
Manufactured by Pioneer Industries Mumbai, these bulkhead reducers are exported worldwide to process automation builders, analyzer shelter fabricators, and pneumatic OEM equipment manufacturers.
Components are precision CNC-machined from premium extruded brass (IS 319 / ASTM B16 / CW614N) with micro-smooth surface finishes. Every production lot undergoes rigorous metallurgical spectrometry, optical CMM dimensional checks, and helium leak detection, accompanied by authentic EN 10204 Type 3.1 Mill Test Certificates.
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Machined from solid extruded brass bar stock (ASTM B16 / IS 319), each bulkhead reducer features micro-finished dual camming cones matching the respective tube diameters.
The external threaded body accommodates panel thicknesses up to 12.7 mm, providing absolute resistance against vibration-induced loosening.
Metric sizes reducing from 6mm, 8mm, 10mm, 12mm down to 4mm, 6mm, 8mm (MPBR Series) and fractional sizes reducing from 1/2", 3/8" down to 1/4", 1/8" (IPBR Series).
Explore comprehensive engineering dimensional configurations for Metric Series and Fractional Series, Operating Parameters, and Certified Metallurgy. Manufactured according to ASME B31.3, ISO 19879, and international instrumentation standards.
| Part No. | Tube O.D. Tin | E Min | h in | H in | F | l | l 1 | l 2 | L | L 1 | Panel Hole DrillSize | Max Panel Thickness | Working Pressure |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MPBR-02-02 | 1/8 | 2.03 | 1/2 | 7/16 | 12.70 | 42.92 | 24.63 | 13.46 | 49.53 | 31.24 | 8.33 | 12.70 | 5,000 PSI / 345 Bar |
| MPBR-04-04 | 1/4 | 4.82 | 5/8 | 9/16 | 15.24 | 48.51 | 26.16 | 15.74 | 55.88 | 33.52 | 11.50 | 10.16 | 5,000 PSI / 345 Bar |
| MPBR-06-06 | 3/8 | 7.11 | 3/4 | 11/16 | 16.76 | 53.84 | 29.46 | 17.52 | 61.21 | 36.83 | 14.68 | 11.17 | 5,000 PSI / 345 Bar |
| MPBR-08-08 | 1/2 | 10.41 | 15/16 | 7/8 | 22.86 | 62.73 | 31.75 | 23.11 | 72.89 | 41.91 | 19.44 | 12.70 | 5,000 PSI / 345 Bar |
| Part No. | Tube O.D. Tin | E Min | h in | H in | F | l | l 1 | l 2 | L | L 1 | Panel Hole DrillSize | Max Panel Thickness | Working Pressure |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| IPBR-02-02 | 1/8 | 2.03 | 1/2 | 7/16 | 12.70 | 42.92 | 24.63 | 13.46 | 49.53 | 31.24 | 8.33 | 12.70 | 5,000 PSI / 345 Bar |
| IPBR-04-04 | 1/4 | 4.82 | 5/8 | 9/16 | 15.24 | 48.51 | 26.16 | 15.74 | 55.88 | 33.52 | 11.50 | 10.16 | 5,000 PSI / 345 Bar |
| IPBR-06-06 | 3/8 | 7.11 | 3/4 | 11/16 | 16.76 | 53.84 | 29.46 | 17.52 | 61.21 | 36.83 | 14.68 | 11.17 | 5,000 PSI / 345 Bar |
| IPBR-08-08 | 1/2 | 10.41 | 15/16 | 7/8 | 22.86 | 62.73 | 31.75 | 23.11 | 72.89 | 41.91 | 19.44 | 12.70 | 5,000 PSI / 345 Bar |
| Operating Parameter | Standard Specification | Severe Service / High-Pressure Rating |
|---|---|---|
| Fluid Media Compatibility | Compressed Air, Mineral Oils, Hydraulic Fluids, Inert Gases | Natural Gas, Vacuum lines, Steam & Glycol circuits |
| Working Pressure Range | Vacuum to 5,000 PSI (345 Bar) depending on tube size | Proof pressure tested to 1.5× design working pressure |
| Helium Leak Integrity | < 1 × 10⁻⁹ mbar·l/s | Suitable for ultra-clean analytical & vacuum systems |
| Temperature Envelope | -200°C to +200°C (-328°F to +392°F) | Cryogenic to moderate steam and hot oil service |
| Turns From Finger-Tight | 1-1/4 Turns (sizes 1/4" to 1" / 6mm to 25mm) | 3/4 Turn (sizes 1/16" to 3/16" / 2mm to 4mm) |
| Compatible Tubing | Seamless Copper (ASTM B75, B88), Brass (ASTM B135) | Nylon, PU, PTFE (with Pioneer brass tube inserts) |
Pioneer Industries manufactures Brass Double Ferrule Bulkhead Reducer using high-tensile extruded brass bar stock and forgings with controlled microstructural annealing:
| Component / Grade | Material Standard | Composition / Chemistry |
|---|---|---|
| Fitting Body / Bar | ASTM B16 / IS 319 Gr. 1 / CW614N | Cu: 60.0–63.0%, Pb: 2.5–3.7%, Fe: 0.35% Max, Zn: Balance |
| Forged Elbows / Tees | ASTM B283 / CW617N C37700 | Cu: 57.0–60.0%, Pb: 1.5–2.5%, Fe: 0.30% Max, Zn: Balance |
| Front & Back Ferrules | ASTM B16 / Cold-Worked Annealed | Controlled Alpha-Beta phase balance for clean collet swaging |
| Optional Naval Brass | ASTM B21 / CW712R C46400 | Cu: 59.0–62.0%, Sn: 0.5–1.0%, Pb: 0.20% Max, Zn: Balance |
Our manufacturing, swaging tolerances, and quality verification strictly adhere to international engineering benchmarks:
Brass Double Ferrule Bulkhead Reducer components are deployed across demanding industrial instrumentation, process lines, and pneumatic circuits, including:
Reducing 1/2″ main pneumatic header feed down to 1/4″ solenoid pilot tubes across enclosure walls.
Reducing 3/8″ fast-loop sample lines down to 1/8″ chromatograph injection lines across shelter walls.
Transitioning from heavy external hydraulic feed lines to compact internal gauge tubing.
Stepping down chemical line sizes across containment partitions.
Seawater-resistant pass-throughs reducing external air lines to console controls.
Reducing high-pressure supply line sizes through enclosure bulkheads.
Transitioning supply manifold tubing down to test gauge lines on operator panels.
Connecting external lube headers to internal sensing lines across package walls.
Pioneer Industries’ Brass Double Ferrule Bulkhead Reducer components are trusted across critical global industrial sectors:
Expert engineering insights and technical guidance regarding swaging mechanics, pressure thresholds, tubing compatibility, and installation protocols for Brass Double Ferrule Bulkhead Reducer.
A Brass Double Ferrule Bulkhead Reducer allows tubing of one outer diameter on the exterior of a panel or enclosure to connect directly to tubing of a smaller outer diameter on the interior, providing a rigid, hermetically sealed pass-through connection in a single fitting.
Instead of installing a separate bulkhead union plus an inline reducing union, this fitting integrates both functions into a single body, cutting total assembly length by half and eliminating two potential leak points.
Standard combinations include 12mm to 6mm, 10mm to 6mm, 8mm to 6mm (Metric MPBR Series), and 1/2″ to 1/4″, 3/8″ to 1/4″, 1/4″ to 1/8″ (Fractional IPBR Series). Custom reducing steps can be manufactured on order.
Accommodates panel thicknesses up to 12.7 mm (1/2″) utilizing two heavy-duty brass hex jam nuts with optional lock washers.
Operating pressures reach up to 5,000 PSI (345 Bar) depending on the larger tube OD rating, across temperatures from -200°C to +200°C (-328°F to +392°F).
Extruded brass bar stock conforming to ASTM B16 Alloy C36000 and IS 319 Grade 1, offering excellent tensile strength and corrosion resistance.
Yes. Both the larger and smaller ports utilize Pioneer twin-ferrule technology: 1-1/4 turns from finger-tight for sizes 1/4″ (6mm) and above, or 3/4 turn for sizes under 1/4″.
Yes. Loosening the nut on one side does not affect the seal or panel clamping of the opposite side.
Yes. Each batch is qualified for helium leak rates below 1 × 10⁻⁹ mbar·l/s, suitable for coarse vacuum down to -750 mmHg.
Supplied with authentic EN 10204 Type 3.1 Material Test Certificates, dimensional inspection reports, and RoHS compliance declarations.
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Note: Please note that the information on this document is for illustration purposes only as information may vary with individual products, their grade and applications industries or uses and therefore cannot be guaranteed as accurate. © Copyright 2026 by Pioneer Industries. All Rights Reserved.
