Valves for Spacecraft Propulsion Systems

Propulsion control valves provide solutions for several spacecraft applications, from attitude control systems (ACS) to orbit insertion to descent systems. Flight-proven, highly reliable Moog valves are qualified for chemical, electric, green and cold gas propulsion systems and rocket engines. Valves are at the core of our ability to design, manufacture and deliver complete, tank-to-thruster propulsion systems. Electrical and mechanical valves are highlighted below

Flow Control Valves

Products include: flow control valves for chemical thrusters, proportional flow control for electric propulsion thrusters, three way valves, and flow path selection for spacecraft hydraulic systems.


  • Mars Science Laboratory (MSL)
  • AEHF, TacSat-2, ISS & Resupply (Columbus, MPLM, and ATV)
  • QinetiQ Comsat
  • BepiColombo

Isolation Valves

Products include: latching and solenoid valves for liquid and gas operation. Isolation valves provide variations from low to high flow and are versatile for use in commercial, civil and military applications.


  • Eurostar 3000, PRISMA
  • Iridium/IridiumNEXT
  • Globalstar-1/-2, Galileo (ENSS)
  • Planck Observatory
  • AEHF
  • ISS & Resupply (Columbus and ATV)

Thruster Valves

A wide breadth of thruster valves for various applications, including: monopropellant solenoid valves, bipropellant torque motor valves and cold gas valves. Moog thruster valves are used in applications requiring thrust levels ranging from hundreds of pounds to one tenth of a pound of thrust (lbf).

Moog thruster valves have global coverage, including all major thruster providers on every type of platform.

Service (Fill and Drain) Valves

Direct-acting, mechanically operated fill and drain valves are offered in high pressure to low pressure to meet mission requirements. Service valves have triple redundant external leakage seals and are available in stainless steel or titanium with EPR or KALREZ® seals. Moog also offers service valves with flight half (FH) and ground half couplings (GHC).


  • Mars Science Laboratory (MSL),
  • Landsat 8 (LDCM),
  • MAVEN,
  • Juno,
  • LS1300
  • Spacebus 4000
  • Rosetta

High Thrust Apogee Engine Valve

Moog is responsible for the development of the High Thrust Apogee Engine Valve (HTAEV) which is the baseline for the High Thrust Apogee Engine (HTAE) being supported by ESA for its planetary science and exploration mission programmes. This valve is a normally-closed, non-sliding fit, dual coil design which features both internal filter and internal heater installation.


  • Part of ESA’s Mars Robotic Exploration Programme (MREP)