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Self-Closing Vacuum Breaker – Model 4772

Self-Closing Vacuum Breaker – Model 4772

EWFM supply the Self-Closing vacuum breaker (dead Man) 4772. This Vacuum Breaker allows liquid in the pipe to flow rapidly when the ball valve is closed. It breaks the vacuum in the line by allowing air into the system. Therefore the product is evacuated rapidly in to the tank truck or rail car. This is a Self-closing device suitable for installation on ISO 5211 connection which is available for Dn 1.5” and Dn 3.75” ball valves.

For other loading arm accessories, please head to the bottom of our loading arm page where you can find a range valves, accessories and signal switches which are all compatible with our loading arms.

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Body – Aluminium alloy

Plug – Aluminium alloy

Operating stem – AISI 316L

Valve fixing screws – AISI 304

Plug screws – AISI 304

Spring fixing screw – AISI 304

Stop screw – AISI 304


This self-closing device is suitable for installation on an ISO 5211 connection


This is available for Dn 1.5″ or Dn 3.75″ ball valves

Alternative designs and specifications for the Self-Closing Vacuum Breaker – Model 4772 are available on request

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