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Item Number CVB-400, Vacuum Breaker CVB-400

Model 'CVB-400'

Available in stainless steel body with 1" npt end connections for steam pressures up to 400 psig saturated steam service.

Materials of construction:
  • Body: Stainless Steel
  • Disc: Stainless Steel
  • Spring: Stainless Steel
The preferred method of installation is in the vertical upright position. A horizontal installation should only be used if no other option is available, and only above the condensate level.

Vacuum breakers should be placed at the highest practical point for the system or equipment being serviced.

Unit of Measure: Imperial Metric Both



41 mm
1 5/8


35 mm
1 3/8


0.2 kg

Valve Coefficent (Cv)


Valve Cracking Pressure

0.6 psi

Valve Cracking Pressure of Water

16.7 in

Valve Cracking Pressure of Mercury

1.2 in

Body Material

303 Stainless Steel

Spring Material

316 Stainless Steel (Inconel Optional)

Disc Material

316 Stainless Steel

Guard Material

316 Stainless Steel

Retaining Ring Material

316 Stainless Steel


CVB-400 - Product Data Bulletin
(PDF, 161KB)

CVB Series - Installation, Operating & Maintenance Instructions
(PDF, 106KB)