Cw ser. 50 modelunidirectional special design cast body and bonnet full flange high pressure Gate valve with a knife-edge design a rugged cast body and bonnet combined with a shut, Off system based on half, Wedges on the body and gate means the knife gate valve offers the highest performance concerning seal both valve seat and to atmosphere and of working pressures as well. For use with heavy or hazardous fluids and high in the, Working pressures chemical or food industry reactors, . .. Along with in the environmental sector pumping of waste waters, Sludge .