Graham Corporation Heliflow heat exchanger, model number 8WXF-12, serial number 06-63880-3, 100 P...

Graham Corporation Heliflow heat exchanger, model number 8WXF-12, serial number 04-58751-2, 100 P...

Graham Corporation Heliflow heat exchanger, model number 8WXF-12, serial number 06-63880-4, 100 P...

Graham Corporation Heliflow heat exchanger, model number 9XF-14, serial number 05-63018-1, 65 PSI...