Manual relief valves designed for small containers or packaging cases allow users to manually equalise before opening the containers.

The relief valves can be installed through a single hole in the case wall and are supplied with all attaching hardware. Some models come with the safety wire protection feature to prevent unauthorised openings. The recommended torque value for installing all manual relief valves is 30 lbs/ins.

  • Easy to install
  • Perfect product that can be used with small containers
  • Tamperproof
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 anodised
  • A captive knurled twist knob for hand operation can be used in thin wall containers
  • Fully immersion proof as this unit is IP67 rated
  • Can be mounted through a 0.5-inch (13mm) diameter hole
0.200-20 UNF Thread Breather Valve
  • A “push-to-open” relief valve
  • Has a side venting design to enable pressure equalisation
  • Open automatically at vacuum pressures above 6.0 psid
  • Can be mounted through a 0.5-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 0.5-inch (13 mm) diameter hole

Manual Relief Valve (Exhaust Port) 

The valve is an exhaust port that can be used as an inlet connection on containers, featuring a manual override button to open the port. The Self-Sealing Valve allows air to enter the container but prevents air from flowing.

0.466-32 UNS Thread Breather Valve 

Black anodised, the breather valve has a captive knurled twist knob for hand operation and can be used in thin wall containers. It mounts through a 0.50 in. (13mm) diameter hole, is MS18014-1, is IP67 rated, and is fully immersion-proof.

0.2000-20 UNF Thread Breather Valve 

The medium-sized “turn-to-open” valve has a recessed captive screw that must be rotated 1 or 2 with a screwdriver or coin to open the valve. Supplied with a safety wire feature, the valve can be mounted through a 0.51-inch (13 mm) diameter hole.

0.200-20 UNF Thread Breather Valve 

The “push-to-open” valve can be mounted through a 0.51-inch (13 mm diameter hole). Its side venting design enables pressure equalisation even when the button is depressed by personnel wearing arctic gloves and opens automatically at vacuum pressures above 6 psi.

*There is no visual indication of whether the manual valves are open or closed. Speak to professionals about the consequences of continuous exposure to the outside atmosphere if left open; potential damage to the container is left closed.

Manual Relief Valve Product Brochure: Download