Fluid Products, Full-Flow Brass Couplings & Nipples

DN51 (Series 921)

  • Valveless design
  • Unrestricted flow
  • Tarnish-resistant finish

CEJN Series 701, 851, and 921 brass couplings feature an economical valveless design that permits unrestricted, high flow and accommodates high viscosity fluids. The straightforward design reduces pressure drop. The couplings offer long service life in low-pressure applications, such as fluid transfer, mold coolant/heating, chemical processing, and vacuum service. Optional color-coded rings and a safety-locking device are available for added safety protection.

CEJN full-flow couplings are also available in stainless steel. See Series 702, 852, & 922.

DN51 (Series 921)
Technical data
Nominal flow diameter: 50.8 mm (2")
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
 10 921 0407109210407NPT 2"NBR65.586.675

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.

Please complete the form below in order to gain access to downloadable product files. The data you provide is for internal information purposes only and will not be published or made available outside of CEJN.

Available files for download