Graco Circulation and Return Tube Kits Details For recirculation of polyurethane materials from proportioner to 55 gal (200 L) fluid supply drums.4000 psi (27.6 MPa, 276 bar) maximum fluid working ... Details Back For recirculation of polyurethane materials from proportioner to 55 gal (200 L) fluid supply drums.4000 psi (27.6 MPa, 276 bar) maximum fluid working pressure.
