Manual Relief Valves


The Manual Relief Valves offer various methods to equalize vacuum differentials or pressure before opening the containers. It comes with attaching hardware and can be easily installed on the wall of the case. Some models even come with a safety wire protection feature to prevent the containers from unauthorized openings of the valves. The torque value for the installation is 30 lbs/ins.

Key Features

Product Features

  • Easy to install
  • Perfect product that can be used with small containers
  • Tamperproof

Selection Guide

Selection Guide

Manual Relief Valve (Exhaust Port)

  • A manual override button to open the port 
  • Can be used as an inlet connection on containers. 
  • self-sealing valve allows air to enter the container only

0.466-32 UNS Thread Breather Valve

  • Black anodized
  • A captive knurled twist knob for hand operation and can be used in thin wall containers 
  • Fully immersion proof as this unit is IP67 rated
  • Can be mounted through a 0.50 inch (13mm) diameter hole

0.200-20 UNF Thread Breather Valve

  •  A “push-to-open” relief valve
  • Has a side venting design enable pressure equalization 
  • Open automatically at vacuum pressures above 6.0 psid. 
  • Can be mounted through a 0.50 inch (13mm) diameter hole

0.2000-20 UNF Thread Breather Valve

  • A medium-sized “turn-to-open” manual relief valve 
  • Equipped with a recessed captive screw which can be opened with a screwdriver or coin
  • Can be mounted through a 0.51 inch (13 mm) diameter hole. 

Manual Relief Valves Brochure