Mud Valves

NRS style ductile iron/stainless steel mud valves are designed primarily for use in settling tanks of water and wastewater treatment plants. They are available in both ductile iron and stainless steel bodies. Their intended use is to drain tanks for maintenance or cleaning. Mud Valves are furnished with a 2” square operating nut; however, they can be supplied with optional extension stem or handwheel. The valve uses a Buna-N resilient seat on the plug. The ductile iron/stainless steel body assembly features ASTM A276 stainless steel stems and fasteners to prevent corrosion from years of submerged service.


  • Size Range 3”-12”
  • Materials Ductile iron or stainless steel body, plug and stem cap; Buna-N gasket and
    stainless steel hardware;
  • Temperature Range 33ºF—125ºF
  • Body Style ANSI CL 125-lb. flange