No longer available from Mueller.
a local refrigeration installer should be able to source a replacement
5HP R-22 expansion valve for Mueller Milk Coolers
this system will have a sight glass.
if your Mueller milk cooler does not have a sight glass, then you need the subcooling valve, not this expansion valve
Note the photo is a stock photo and not exactly this item in and out fittings are flare style. they are straight out on both sides
10/21