Thermal Control Products, Full-Flow Couplings & Nipples

Series 921, DN51 Brass

  • Easily operated to facilitate installation
  • Valveless design to allow unrestricted flow
  • Adapted to endure longer periods of connection

CEJN series 921 is our largest Full-Flow brass coupling in DN51. Larger fluid and pneumatic lines with high flow requirements are ideal for this economical valveless quick disconnect coupling. It permits unrestricted flow, a real advantage for circuits within thermal control management, main supply lines within power electronics, renewable energy solutions, etc. The robust and straightforward design reduces pressure drop and makes it easy to maintain and service. Series 921 has a long service life and works in applications with working pressures up to 20 bar. Optional colour-coded rings and a safety-locking device are available for added safety protection.


For other sizes please refer to 701 and 851. For a stainless steel version. See series 702, 852 and 922. If you can’t find a product that meets your requirements, don’t hesitate to contact us, and we’ll put our R&D department at your disposal.

Applications:Heat transfer, compressed airlines, various chemical transfers.

Series 921, DN51 Brass
Technical data
Nominal flow diameter: 50.8 mm (2.0")
Max. working pressure: 20 bar (290 PSI)
Min. burst pressure: 80 bar (1160 PSI)
Temperature range: -30°C — +100°C (-22°F — +212°F)
Material coupling: Nickel-plated brass
Material nipple: Nickel-plated brass
Couplings without valve Part No. Connection Seal Length Diameter Hexagon
Female thread 10 921 0207109210207G 2"NBR74.586.675


Nipples without valve Part No. Connection Seal Length Diameter Hexagon
Female thread 10 921 5207109215207G 2"-7886.675


Check with an authorized CEJN distributor for availability and prices. Other connections and sealing material on request. Some part numbers may be subject to minimum order quantities. CEJN reserves the right to make changes without further notification. Thread connections are listed according to ISO Standards. All measurements are in mm.

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