Premium MH-75 mud gate valve kits are cross compatiblewith legacy Anson disc profile mud valves. Each kitincludes replaceable seat rings that take on the wearinstead of the valve body, extending the service life ofthe valve. All Premium kits use high quality parts andmaterials including stainless steel seats and inserts, andnitride hardened stainless steel gates. Seats are madewith a long-lasting elastomer bonded to two stainlesssteel inserts and a locking device that ensures properalignment during installation. All MH-75 style kits are goodfor service conditions up to 7,500 psi.