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Continue to ChatASCO 335507 - Orifice size 25-32mm, Mode C, Cast Iron Body, ASCO series 218 - Air/Oil Exchanger Installed On Valve https://www.valves-direct.com/product/asco-335507-orifice-size-25-32mm-mode-c-cast-iron-body-asco-series-218-air-oil-exchanger-installed-on-valve/