The valve consists of a single valve cores brazed together.  The valve stage is a solenoid operated flow control valve with a single seat, single coil, normally closed with non-sliding fit configuration.  The design of the seal/seat interface ensures minimal flow discontinuities, therefore reducing susceptibility to contamination induced failures and minimising pressure losses.

The valve is opened independently by energising the coil; the resulting force generated by the induced magnetic flux causing the armature to move towards the ‘fixed pole’, and in doing so lifts the seal from its seat.

The valve is an externally fully welded structure, ensuring the external leak rate is zero.  The inlet incorporates a 25µm particle filter, which is swaged securely in place.  The inlet to the valve can be supplied with welded or threaded connections, using straight inline and right angled connections.  The outlet tube can be similarly customised to suit customer requirements.

Status

The Nammo Space Low Pressure Solenoid Valve has flight heritage on the following platforms:

• Bepi Columbo
• AlphaSat
• HispaSat
• DMC

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