PZ73 manual knife gate valve, manual drive, clamp connection, open rod parallel rigid single gate plate, valve seat sealing surface for cemented carbide, polytetrafluoroethylene or stainless steel body processing, nominal pressure PN10~16, valve body material for carbon steel (PZ73H-10C/16C), stainless steel (PZ73F-10P/16P PZ73Y-10P/16P), gate valve with slag discharge function. With a fully circular channel design, PTFE, mud scraper, polyrubber or wear-resistant hemming cone made of Ni wear-resistant cast iron are installed at the inlet end of the knife gate valve, and multiple flushing ports can be set around the valve body. The bottom end of the blade is machined into a blade with a high finish, ensuring a good seal. Widely meet the papermaking, pulp industry, industrial sewage and urban sewage treatment, chemical plants, fly ash treatment, bulk material transportation, food and beverage industry use requirements and working conditions under harsh and slow down environmental conditions.