Fill and Drain (Service) Valves

Design Features and Benefits
Extensive material (body and seal) options
Tight external leakage (1 x 10-6 sccs)
Tight internal leakage (1 x 10-6 sccs)
Triple redundant sealing
Flange mounting or tube ends available
High capacity and high pressure designs available


Valcor fill and drain valves are metal-to-metal seat valves that maintain extremely low internal & external leakages (1×10^-6 sccs GHe), yet are capable of very high operational cycles (over 100 open/close cycles). Our F&D valves are compatible with liquids + propellants (Hydrazine, NTO, MMH, etc.), ammonia, and pressurants (GHe and GN2). Options such as flange mounting, tube ends (for welding), color coded covers and bodies, and covers with lanyards are also available.


Valcor Fill and Drain valves are found in aircraft pneumatic pressure vessels, hydraulic systems, and waveguide pressurization systems.