VICKERS DGMC 3 PT BW B 41

Paper mill use are actually one of the listed applications for this valve, so you're in the right place. The SystemStak design is built to reduce installation costs by cutting down on the external connections and fittings that create leak points, which sounds like exactly the problem you're trying to solve. Buna-N seals are used throughout, and the valve is rated for 60 liters per minute flow. Eliminating external leakage is one of the core engineering priorities of this design, so for a paper mill setup that's battling hydraulic connections clutter and contamination risk, this one fits the bill.