Danfoss part # 180B4158 Valve Plate kit

The Danfoss part # 180B4158 is a Valve plate kit, used in APP 5.1, APP 6.5, APP 7.2, and APP 8.2 pumps. Made of high corrosion resistant Super Duplex Stainless Steel. Should be serviced and replaced every 24,000 hours depending on severity of use. Minor wear on valve plate can cause large internal leakage. A worn valve plate has scratches, and/or a polished surface. Even small scratches will give a loss of flow. If any scratches or marks can be felt by running a fingernail over the surface, the valve plate is worn.