Manual Relief Valve

Manual Relief Valves allows users to equalise pressure for small containers or cases manually.

They are designed to be used in small containers or cases. Manual relief valves provide various methods to equalise pressure or vacuum differentials before opening the containers. The relief valves can be installed easily through a single hole in the case wall and come complete with all attaching hardware. Some of the models come with the safety wire protection feature to prevent unauthorised opening of the valves. The recommended torque value for installation of all manual relief valves is 30 lbs/ins.

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

Manual Relief Valve (Exhaust Port)

Featuring a manual override button to open the port, the Manual Relief Valve is an exhaust port that can be used as an inlet connection on containers. The self-sealing valve allows air to enter the container but prevent air from flowing out.

0.466-32 UNS Thread Breather Valve

Black anodised, this 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. Meet MS18014-1. This unit is IP67 rated, so fully immersion proof.

0.200-20 UNF Thread Breather Valve

This “push-to-open” relief 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. This unit may open automatically at vacuum pressures above 6.0 psid.

0.2000-20 UNF Thread Breather Valve

This medium-sized “turn-to-open” manual relief valve comes with a recessed captive screw that must be rotated 1 or 2 turns with a screwdriver or coin to open the valve. Apart from its safety wire feature, this valve can be mounted through a 0.51 inch (13 mm) diameter hole.

  • 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 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 Product Brochure: Download