Marotta

Performs Several Functions in One Component

Unique Design and Construction

Marotta's Multi-Function Valve (MFV) offers many of the high performance features demanded by Ion and Hall thruster satellite and spacecraft propulsion systems, and has been successfully tested with commonly used electric propulsion thrusters, both Hall effect and Ion engine types with remarkable results. 

Benefits: Reduces the number of Xenon feed system components Reduced weight Provides both propellant isolation and precise mass flow delivery Can also be used as a pressure regulator

Features: Normally Closed Isolation demonstrated to internal leakage rates less than 1x10-5 sccs GHe at pressures of 2.5 bar to 207 bar (35 to 3,000 psia) and temperatures from -54°C to 93°C (-65°F to 200°F) Precise, modulating closed loop pressure / flow regulation (pressure, flow rate or anode current feedback) from 0°C to 80°C (32°F to 176°F) Electronically adjustable set-point demonstrated to mass flow turndowns greater than 25 to 1 and pressure redictions from 207 bar to 35 millibar (3,000 to 0.5 psia) Can also be used as a pressure regulator and is capable of regulating tank pressures of 150 bars down to 2.5 bars in a single stage Sensor feedback Magnetostrictive material

The device can also operate as an open/closed 2-way valve.

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