Check and Relief Valves

OSC Cygnus
As part of NASA's Commercial Orbital Transportation Services (COTS) project, the Cygnus spacecraft is an unmanned resupply spacecraft designed to transport supplies to the International Space Station (ISS).

Check Valves

Relief Valves

For over 40 years, both VACCO check valves and relief valves have been providing essential protection to system performance for numerous commercial and scientific satellites. Product variations for check valves include single, parallel and series redundant configurations. Relief valves are single seat, non-propulsive designs that have also been integrated with regulators, supporting human space flight.

Common with other VACCO family of flight-qualified hardware, VACCO check valves are standard on many of the leading communication satellite platforms, including those from:

In addition to its usage on leading commercial satellites, VACCO check valves support resupply of the International Space Station and other science satellites, providing critical fluid control on vehicles, such as:


VACCO Check Valves
In addition to standard bi-propellant systems, the VACCO check valve is also an essential component to many dual-mode systems.