Brass CO2 Hose Fittings – Carbonation, Beverage & Gas Service | Brass & Copper Parts India

Brass CO2 hose fittings are precision-machined connectors, couplings, and adapters designed specifically for carbon dioxide gas service in commercial beverage dispensing, carbonation, brewery, fire suppression, welding, and industrial gas systems. Brass & Copper Parts India manufactures CO2 hose fittings from high-grade IS 319 / ASTM B16 free-cutting brass with thread forms per CGA (Compressed Gas Association), NPT (ASME B1.20.1), and BSP standards — supplying USA beverage OEMs, gas equipment distributors, fire suppression contractors, and draft beer system manufacturers. Our CO2 fittings are designed to handle pressures up to 3,000 PSI (207 bar) for cylinder and regulator connections and are available in a complete range of CGA, Perlick, and MFL (Male Flare) configurations.

Product Overview

CO2 hose fittings connect CO2 gas cylinders, regulators, manifolds, and dispensing equipment to flexible high-pressure hoses in commercial and industrial gas handling systems. The fittings must be dimensionally precise, gas-tight, and compatible with CO2 — which, under pressure, is highly solvent and can degrade inferior alloys and elastomers. Our brass CO2 fittings are CNC-machined from IS 319 Grade I brass (Cu 60–63%, Zn bal., Pb 2.5–3.5%) which provides the machinability, dimensional accuracy, and CO2 corrosion resistance required for gas-tight performance. All internal sealing surfaces are precisely machined to accept PTFE or rubber seals without crevice gaps that could harbor contamination.

Key Features

• CGA Standard Compatibility: Available in CGA 320 (CO2), CGA 580 (Nitrogen/Inert Gas), and CGA 540 (Oxygen) thread and outlet configurations for cylinder and regulator connections.
• High-Pressure Rated: Designed for CO2 cylinder pressure up to 3,000 PSI (207 bar) on cylinder connection fittings; regulator outlet fittings rated to 150 PSI (10 bar) service.
• Gas-Tight Machining: All sealing cone surfaces and thread forms are precision-machined to minimize leak paths; fittings are 100% leak-tested with nitrogen/helium on request.
• CO2-Compatible Sealing: Internal seals specified in Buna-N (NBR) or EPDM — both rated for CO2 gas service. PTFE-coated threads available for additional sealing assurance.
• Beverage Grade Compliance: Fittings intended for draught beer and carbonated beverage systems comply with internal surface finish standards (Ra ≤ 1.6 µm) to prevent product contamination.
• MFL (Male Flare) and Barb Ends: Available with male flare (5/8″-18 UNF or 9/16″-18 UNF) for push-in connection to beverage gas hose, or barb shanks for hose clamp assembly.

Technical Specifications

Brass Alloy Grade Equivalents

Product Types and Variants

CGA 320 CO2 Cylinder Outlet Fittings

CGA 320 is the Compressed Gas Association outlet standard for CO2 cylinders in the USA. These fittings feature the CGA 320 male outlet connection (0.885″-14 RH external thread with 2-groove groove nut) machined to tight tolerances for positive engagement with CGA 320 compatible regulators. They are used as cylinder valve outlets, manifold inlet connections, and regulator inlet adapters in commercial draught beer systems, CO2 fire suppression systems, and industrial carbonation equipment. CGA 320 fittings are machined from IS 319 brass and pressure-tested to 3,000 PSI.

CO2 Regulator Outlet Barb Fittings (NPT to Barb)

Regulator outlet fittings transition from the NPT or BSP threaded outlet of a CO2 pressure regulator to a flexible hose barb connection. Available in ¼” NPT male to ¼” or 5/16″ barb, these fittings are used to connect the low-pressure (secondary) side of a CO2 regulator to the beverage gas hose running to a carbonator, keg coupler, or carbonation cap. The barb shank profile is designed for CO2-rated beverage gas tubing (typically 5/16″ ID polyethylene or nylon hose). Supplied with NBR O-ring at the thread end as standard.

MFL (Male Flare) x Barb CO2 Hose Connectors

MFL (Male Flare) fittings feature a 5/8″-18 UNF male flare thread used as a standard connection in draught beer and soda fountain gas systems in North America. These connectors have an MFL male thread on one end and a barb shank (typically ¼” or 5/16″) on the other, used to connect carbonation or CO2 gas hose to a secondary regulator, manifold, or quick-disconnect assembly. They are precision-machined from IS 319 brass with hex grip and polished sealing cone, and are supplied in bulk quantities to draught beer equipment OEMs and beverage gas distributors.

Brass CO2 Hose Manifold Fittings and Tees

CO2 manifold fittings allow a single CO2 cylinder or supply to be distributed to multiple outlets — common in multi-tap bar installations, commercial carbonation plants, and greenhouse CO2 enrichment systems. These tee and cross fittings are machined from brass with all connections in ¼” or 5/16″ barb or NPT thread. They are rated for full CO2 cylinder operating pressure on the inlet side and are available in 2-way, 4-way, and 6-way configurations for draught beer system OEMs and gas system integrators.

CO2 Quick-Disconnect Hose Fittings

Quick-disconnect CO2 fittings (also called CO2 push-in or snap-on connectors) allow rapid hose connection and disconnection in beverage systems, laboratory CO2 incubators, and portable carbonation equipment without tools. The body is machined from IS 319 brass with a stainless steel or brass spring-loaded ball lock mechanism. Available in ¼” push-in barb and NPT/BSP threaded versions. These fittings are 100% function-tested for positive lock and seal before shipment.

Applications by Industry

• Commercial Draught Beer Systems: CGA 320 cylinder connections, regulator outlets, keg couplers, and gas line connectors for commercial bars, pubs, stadiums, and hospitality venues.
• Beverage Carbonation: CO2 gas supply fittings for soft drink carbonation, soda water production, sparkling wine charging, and kombucha carbonation in commercial food and beverage plants.
• Brewery and Craft Beer: Transfer hose connections, bright tank CO2 blanket fittings, and force carbonation connections for commercial and craft breweries.
• CO2 Fire Suppression Systems: High-pressure CO2 cylinder manifold connections and distribution headers in data center, marine vessel, and industrial fire suppression installations.
• Industrial Gas Distribution: CO2 gas supply connections for welding gas mixing, greenhouse enrichment, pH control in water treatment, and industrial process gas systems.
• Medical and Laboratory: CO2 supply connections for incubators, laparoscopic insufflators, and laboratory gas manifolds requiring clean, gas-tight fittings.

Manufacturing Process

Brass CO2 hose fittings are CNC-turned from IS 319 Grade I brass bar stock on multi-axis turning centers. Critical dimensions — including CGA thread pitch and groove form, MFL flare cone angle (45°), and sealing seat bore diameter — are machined to drawing tolerances of ±0.02 mm and verified with dedicated gauges calibrated to CGA Pamphlet V-1 specifications. All CO2 fittings destined for high-pressure cylinder service are proof-tested at 1.5× working pressure with nitrogen before packing. Beverage-grade fittings have internal bores polished to Ra ≤ 1.6 µm. Finished parts are cleaned, degreased, and assembled with CO2-compatible NBR or EPDM seals. Complete batch documentation including material cert, gauge records, and pressure test reports is maintained for traceability.

Quality Standards and Certifications

• ISO 9001:2015 Certified Manufacturing
• CGA (Compressed Gas Association) V-1 dimensional conformance for CGA 320, 580, 540 outlets
• Thread inspection per ASME B1.20.1 (NPT) and CGA V-1
• Pressure testing at 1.5× WP (nitrogen) for cylinder-side fittings
• Material certification per ASTM B16 / IS 319 with spectrographic analysis reports
• RoHS, REACH compliant; beverage contact compliance per FDA 21 CFR 110

Why Choose Brass & Copper Parts India

• CGA Standard Expertise: We hold CGA V-1 dimensional specifications and maintain dedicated CGA thread gauges — critical for CO2, nitrogen, and oxygen cylinder outlet fittings exported to the USA.
• Pressure Test Capability: In-house proof testing at 1.5× working pressure with nitrogen ensures zero DOA (Dead On Arrival) fittings in your supply chain.
• Beverage Industry Experience: Established supply relationships with USA draught beer equipment OEMs and beverage gas distributors with FDA-compliant material supply.
• Full Material Traceability: ASTM B16 / IS 319 material certs, pressure test records, and dimensional reports supplied with every batch.
• Custom CGA and MFL Configurations: Non-standard thread combinations, custom manifold fittings, and OEM-branded assemblies available for program volumes.

Frequently Asked Questions

What is a CGA 320 fitting and why is it used for CO2?

CGA 320 is the Compressed Gas Association’s designated outlet standard for CO2 cylinders used in commercial and industrial applications in North America. The 0.885″-14 RH external thread and 2-groove specification is unique to CO2, preventing accidental cross-connection with other gas cylinders — a critical safety feature. All CO2 cylinder regulators and manifolds in the USA use CGA 320 connections.

Can brass fittings be used for CO2 service?

Yes. Brass (Cu-Zn-Pb alloys per ASTM B16 / IS 319) is a standard and widely accepted material for CO2 gas service up to its pressure and temperature ratings. CO2 does not corrode brass under normal gas-phase conditions. However, CO2-enriched water (carbonic acid) is mildly corrosive to brass — for liquid CO2 or wet CO2 service, please consult us on material selection.

What is the maximum working pressure for CO2 cylinder fittings?

Our CGA 320 cylinder outlet fittings are designed and proof-tested for use with CO2 cylinders rated at 1,800–2,200 PSI service pressure and proof-tested at 3,000 PSI. Regulator outlet (secondary side) fittings are rated to 150 PSI. Always verify the fitting’s pressure rating against your specific application.

Are these fittings suitable for food-grade and beverage CO2 service?

Yes. Our beverage-grade CO2 fittings are machined with internal bore finish Ra ≤ 1.6 µm and use NBR or EPDM seals rated for food contact. Material compliance with FDA 21 CFR 110 can be provided. For direct product-contact applications, please specify FDA compliance requirements when ordering.

What is the difference between MFL and CGA 320 connections?

CGA 320 is the high-pressure cylinder outlet connection (0.885″-14 RH) used between CO2 cylinders and primary regulators. MFL (Male Flare, 5/8″-18 UNF) is the secondary/low-pressure connection used between regulators and gas distribution hoses in draught beer systems. Both are standard North American connections that we manufacture and supply.

Do you supply CO2 fittings for BSP (British Standard Pipe) markets?

Yes. We supply CO2 hose fittings with BSPP (ISO 228/G) and BSPT (ISO 7/1) threads for UK, European, Australian, and Middle Eastern markets where BSP connections are standard on CO2 equipment.

Can you supply CO2 fittings pre-assembled with hose?

We supply fittings only. For complete hose assemblies, please contact our hose assembly partners. We can supply fittings sized specifically for your hose OEM’s hose bore diameter.

What is the minimum order quantity for CO2 hose fittings?

Standard catalog sizes: MOQ 500 pieces per SKU. Custom CGA configurations or manifold fittings: MOQ 1,000 pieces, 5–7 week lead time. Beverage gas OEM programs with annual volumes exceeding 10,000 pieces benefit from blanket order pricing.

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Request a Quote for Brass CO2 Hose Fittings

Brass & Copper Parts India supplies precision-machined brass CO2 hose fittings to USA beverage OEMs, draught beer system manufacturers, industrial gas distributors, and fire suppression contractors. Contact us with your CGA outlet, NPT/BSP size, working pressure, quantity, and FDA compliance requirements for a competitive quotation. Get in touch today.