Thermal-sprayed HVOF tungsten carbide coatings on metal seal surfaces increase erosion resistance during high-velocity frac sand flow. These coatings extend seal life from weeks to years in severe-service manifold valves pumping over 20 million pounds of proppant per well. https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/