Product_description: ['Springer Parts 3139234321SP part number replaces Alfa-Laval part number 3139234321; Seat Valve:SRC-GC-3A-2.0-77-20-NT; Springer Pumps, LLC is pleased to offer our clients Springer Parts! Springer Parts are replacement pump parts, pump replacement kits and replacement mechanical seals. Springer Pumps proudly offers them 20%