EXVElectronic Expansion Valve
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Review of the failures indicated a small amount of chloride corrosion on the EXV valves which resulted in refrigerant by pass.
Table 1 Elemental Analysis of EXV Debris Site #1 Site #1 Element Weight % Weight % Aluminum 19.
Stephen Phipson, Group Managing Director of Smiths Detection, said: "The SABRE EXV will fill a gap in detecting Improvised Explosive Devices (IEDs) for the military and airline industries in particular.
They have been used in a number of high-profile terror plots in recent years and the SABRE EXV has been developed specifically to combat those threats.
The SABRE EXV will provide aviation security officials and the military a reliable, light-weight detector that can detect these unstable chemicals, which pose a threat when assembled as part of a bomb or while being transported.
rated] for a TXV should be relatively constant if the flow is not choked and that for an EXV should be constant.
In summary, from manufacturers' standard rating data, the flow across a TXV or EXV is either not choked or, as observed by Kim et al.
The valve position for an EXV can be calculated easily from the control signal,
For an EXV, an overall mass flow rate model can be obtained by substituting the throat area into Equation 1 and coupling the valve position to a specific feedback controller algorithm.
Because TXVs and EXVs use different control strategies, the first step is to derive A in terms of valve position and then develop expressions for valve position in terms of superheat.