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Stupid ? on Expansion Valves??

Runboy on Sat May 17, 2008 11:07 AM User is offline

Can someone please help me understand what the difference is internally between different application expansion valves. Looking through a catalog I see so many that look almost identical and even within a specific manufacturer application, they look the same from one year to the next but call out different part #'s.
Is it mainly a capacity/flow issue?
Leads me to wonder if the TXV needs to in some way be matched to the compressor or evaporator when putting together a custom system.
Thanks for any input.
Mike

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89' F-350 Crew Cab 7.3L Banks Turbo

2000 E-series Condenser, R134 Converted with Orange Orifice Tube
[IMG]http://members.aol.com/runboy7426/runboycaricaturesmall.gif[/IMG]

TRB on Sat May 17, 2008 11:16 AM User is offlineView users profile

Short answer is,

fitting size
capillary tube type and length
tonnage of the valve
flare or o-ring fittings
internally or externally equalized

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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
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Runboy on Sun May 18, 2008 12:22 AM User is offline

What would be the real world result of swapping to a different valve with the same tonage rating and a higher superheat #?
Mike

-------------------------
89' F-350 Crew Cab 7.3L Banks Turbo

2000 E-series Condenser, R134 Converted with Orange Orifice Tube
[IMG]http://members.aol.com/runboy7426/runboycaricaturesmall.gif[/IMG]

TRB on Sun May 18, 2008 12:31 AM User is offlineView users profile

In my opinion not much. Too many variables in a auto a/c system compared to a stationary system. Maybe one of the engineers will provide a more detailed answer.

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

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