Here is a  part number 113506 NEW High pressure valve plate for  Quincy QRDT30 QRDT-30 compressor.  There are 2 of these valves plates on a 4 cylinder QRDT 25 or QRDT 30 compressor.  Quincy no longer supplies these.  

I bought the remaining stock from Quincy so we could continue to support the QRDS and QRDT line of compressors.

 Quincy had obsoleted the QRDS and QRDT compressors.  I have accumulated many replacement parts for this line of compressors and will continue to offer parts and rebuilt compressor cores.   

I also have new Low Pressure valve plates and the gaskets that go on both sides of the valve plates.

We can offer a multitude of parts for the QRDT pumps including wrist pins, pistons, cylinders, heads, connecting rods, and all other parts you would need to rebuild you QRDT compressor

Look at my other auctions for other Quincy QRDS items such as needle bearing set, plus viton seal sets and gasket kits.  If you need your QRDS compressor rebuilt we also offer a core-exchange program, where we'll send you a rebuilt compressor with new bearings, seals, gaskets & filters and will accept your old rebuildable unit in trade.