A variant has now been developed to enable a MEOP of up to 120bar.  As with the low pressure variant, it is a mono-stable solenoid, using a single coil to energise the movement of a suspended sealing armature.  This assembly is located using a diaphragm spring to ensure a non-sliding fit.  The armature to seat profiles have been designed to minimise flow discontinuities, thereby reducing the susceptibility to contamination induced failures.

The valve uses a flat faced seal to reduce the risk associated with valve internal leakage due to a high cycle life.  When in the unpowered state, system pressure forces and a spring, work together to keep the armature held in the closed position.  The inlet filter rating and mechanical interfaces can be customised to suit the customer requirements.  The valve was used on the Proba 2 mission for ESA.

Status

The high pressure flow control valve is qualified and has flown on Proba 2.

NAMMO CHELTENHAM

GENERAL CAPABILITIES

• Dedicated, skilled space engineering team
• Experienced Assembly Integration and Test team
• Program Management

QUALITY AND INSPECTION

• Certified to AS9100
• Inspection department including CMM and optical measuring equipment
• Laser part marking
• Complete traceability of inspection records
• Material traceability from original mill source to final components

CLEANROOM and ENVIRONMENTAL TESTING

• ISO Class 8 environment, with Class 5 laminar flow booths
• Large 1m diameter x 2m long Vacuum chamber
• Thermal vacuum chambers
• Thrust test facility
• Vacuum/leak testing and pressure testing.
• Air borne and liquid Particle measurement.
• Pressure Test facility to 1500 bar
• Computer controlled TIG and Orbital TIG weld facility