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CEJN
Breathing Air

Breathing Air

Product catalog summary

Overview
CEJN specializes in quick connect solutions, focusing on quality, performance, and safety, particularly in breathing air applications. With over 50 years of experience, CEJN offers a wide range of products for various media and applications.

Product Specifications

Series 141: Designed for liquid supply in closed-suit applications, featuring one-hand operation. Made of chrome-plated brass with NBR seals, it supports a max working pressure of 10 bar and a temperature range of -30°C to +100°C.
Series 221: Suitable for laboratory breathing air systems and diving applications, made of chrome-plated brass, supporting a max working pressure of 35 bar.
Series 341: Ideal for air cushion inflation and diving applications, made of nickel-plated brass, supporting a max working pressure of 35 bar.
Series 342: Constructed with hardened steel for demanding industrial environments, compatible with Series 341 and 346.
Series 344: Lightweight design for firefighting and diving applications, made of nickel-plated brass, supporting a max working pressure of 35 bar.
Series 345: Double shut-off series for diving applications, made of nickel-plated brass, supporting a max working pressure of 35 bar.
Series 346: Made of AISI 316 stainless steel for tough environments, suitable for offshore applications.

Technical Data
CEJN products are designed with specific materials and seal types to ensure durability and performance under various pressures and temperatures, meeting stringent quality standards.

Compatibility and Standards
CEJN products follow ISO standards for thread connections, with specific couplings and nipples designed to work together within the same series.

Specifications

Materials: Nickel-plated brass, stainless steel, and zinc-plated steel ensure durability and corrosion resistance.
Seal Materials: NBR and EPDM are used for sealing, suitable for low-temperature environments.
Pressure Ratings: Maximum working pressures range from 10 bar to 35 bar, with minimum burst pressures at 140 bar.
Temperature Range: Operating temperatures span from -30°C to +150°C.

Series Details

Series 347: Designed for high airflow applications with a valved nipple and integrated safety features.
Series 348: Suitable for firefighting applications with partial stainless steel construction.
Series 441 and 442: Offer high airflow rates for demanding industrial environments, compatible with each other.

Hose and Adapter Information

Spiral Non-Braided Hose: Made from ester-based polyurethane, designed for breathing air and compressed air applications with anti-spark protection.
Adapters and Connectors: A wide range of adapters, bushings, and plugs are available, featuring high burst pressure and corrosion resistance.

Applications
CEJN products are suitable for industrial, chemical, and laboratory environments, as well as specific uses like air cushion inflation and firefighting equipment.

Conclusion
CEJN products are designed for reliability and safety in environments where life and health are at risk, emphasizing quality and safety.

Introduction
CEJN has been a key supplier of coupling technology to MSA AUER for over 30 years, providing high-quality products for safety equipment such as breathing apparatus and gas detection systems.

Partnerships and Collaborations
CEJN partners with Sundström Safety AB, providing components for respiratory protection equipment, meeting European Standards.

Technical Data and Standards
Includes conversion tables for pressure, flow, volume, length, force, mass, and torque, adhering to international standards.

Maintenance and Best Practices
Regular maintenance is advised to ensure longevity and performance, including keeping components clean and checking seals.

Catalog excerpts

fully in line with market demands and requirements >

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Our product range has, since CEJN was established in 1955, expanded and covers today all types of pressures and media. Th e range suitable for breathing air applications offers besides quick connect couplings and nipples also spi ral hoses, hose kits and a wide variety of accessories. Safety and function are important elements in the production of all CEJN prod-ucts but are especially important within this specific field. C EJN֒s own tolerance demands on breathing air products are significantly more stringent than industry standards. And each product is put through extra rigorous tests to ensure...

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Series 141 is one-hand operated with very small outside dimensions, making it ideal for liquid supply in closed-suit applications. Technical Data Material: Chrome-plated brassSeal material: NBR Water flow at pressure drop 4 bar (58 PSI): 3.5 l/min (0.9 GPM US) Air flow at inlet pressure 6 bar (87 PSI) and pressure drop 0.5 bar (7 PSI): 86 l/min (3 CFM) Max. working pressure: 10 bar (145 PSI) Min. burst pressure: 40 bar (580 PSI) Temperature range: -30C to +100аC (-22F to +212аF) Nominal flow diameter: 2.5 mm (3/32") Couplings: Not compatible with other Series for breathing air applications Nipples:...

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In addition to a grip-friendly locking sleeve and small outside dimensions, Series 221 offers a high rate of airflow and a wide connection range. This coupling series is ideal for laboratory breathing air systems, dry suit inflation, and diving applications. > Technical Data Material: Chrome-plated brassSeal material: NBR Airflow at inlet pressure 6 bar (87 PSI) and pressure drop 0.5 bar (7 PSI): 580 l/min (20.5 CFM) Max. working pressure: 35 bar (508 PSI) Min. burst pressure: 140 bar (2030 PSI) Temperature range: -30ְC to +100C (-22аF to +212F) Nominal flow diameter: 5.0 mm (3/16") Couplings:...

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Pressure drop, bar (PSI) Flow l/min. (CFM) Thread connections are listed according to ISO Standards. See Page 20 for additional information. All measurements are in mm. Check with an authorized CEJN distributor for availability and prices. Nipples Couplings

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CONTACT PERSON: Lars RonnerTechnical Sales Manager > COMPANY: Sundstrm Safety AB Liding, Sweden www.srsafety.se >

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From To Multiply by Example MPa (megapascal) * bar 10 10 MPa x 10 = 100 barMPa kp/cm > 2 10.197 10 MPa x 10.197 = 101.97 kp/cm > 2 MPa PSI 145.0 10 MPa x 145.0 = 1450 PSI bar (bar) kp/cm > 2 1.020 10 bar x 1.020 = 10.2 kp/cm > 2 bar MPa 0.1 10 bar x 0.1 = 1.0 MPa bar PSI 14.504 10 bar x 14.504 = 145 PSI kp/cm > 2 (kilopound/cm > 2 ) bar 0.981 10 kp/cm > 2 x 0.981 = 9.81 barkp/cm > 2 MPa 0.0981 10 kp/cm > 2 x 0.0981 = 0.981 MPakp/cm > 2 PSI 14.223 10 kp/cm > 2 x 14.223 = 142.2 PSI PSI (Pounds/square inch) bar 0.0689 100 PSI x 0.0689 = 6.89 bar PSI kp/cm > 2 0.0703 100 PSI x 0.0703 = 7.03 kp/cm...

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Force > From To Multiply by Example N (newton) * kp 0.1020 10 N x 0.1020 = 1.02 kpN lbf 0.2248 10 N x 0.2248 = 2.25 lbfkp (kilogram force) N 9.806 10 kp x 9.806 = 98.06 Nkp lbf 2.205 10 kp x 2.204 = 22.05 lbflbf (pound force) kp 0.454 10 lbf x 0.454 = 4.54 kplbf N 4.448 10 lbf x 4.448 = 44.48 N Mass > From To Multiply by Example kg (kilogram) * lb 2.205 10 kg x 2.205 = 22.05 lblb (pound) kg 0.454 10 lb x 0.454 = 4.54 kg Torque > From To Multiply by Example Nm (newton meter) kpm 0.1020 10 Nm x 0.1020 = 1.02 kpmNm lbfft 0.7376 10 Nm x 0.7376 = 7.38 lbfftkpm (kilo pound meter) Nm 9.81 10 kpm x 9.81...

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NBR Resistant to water, gasoline, grease -30ְC to +100C Breathing air, Nitrile Rubber mineral oil, heat, and alkalis. (-22аF to +212F) compressed air, "Buna-N" Sensitive to ozone. oil, waterFPM Not recommended for breathing air. -15аC to +200C Chemicals, Fluorocrabon Rubber Can release small amounts of (-5аF to +392F) hot air VitonЮ mustard gas at high temperatures.EPDM Good qualities for hot water, -40C to +150аC Breathing air, Etylene Propylene Rubber alkalines, and acids. Not re- (-40F to +302аF) Water "EPDM"/ "EPM" / EPӔ commended for mineral oil.NBR for low-temperatures Recommended for low-temperature...

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09 001 2450 / 0811 / Bording, Eskilstuna Sweden >

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Breathing Air

Breathing Air

Catalog excerpts

All CEJN catalogs and technical brochures