The cold plates were purchased (usually Dole) , as was the compressor and the rest of the gear by Grunert..
New compressors are seldom more efficient , but if yours dies a company like harry alter , or your local commercial refrigeration supply will have the newest version of the size compressor you require.
R-12 is expensive , the replacement using both propane and butane is about 15% more efficient , and cheap and available ,
BUT it is flammable. In England with the very indifferent labor there have been some leaks , but boats are usually serviced by pros.
Use it with a bilge sniffer (as a propane stove would use) if you worry.
The temperature the plate requires is about 10deg below the eutetic freeze/ melt temp.
This will be set by the TX valve.
Catalog - Harry Alter Co.
Catalog - Harry Alter Co.
Since 1933 – when we were the first wholesaler of
refrigeration supplies in the U.S. – we've
supplied customers with a comprehensive selection of wholesale ...