Missile propulsion hot gas piston valve command having seat section valve sliding and second lower gas pressure closing valve when first gas supply depleted

摘要

The piston valve command hot gas system has a piston valve (12) with a closing seat mechanism (25) through which gas under pressure (P2) passes. A second pressure chamber has a lower pressure (P1) initially. As the main gas supply becomes depleted, the second gas pressure closes the valve.