Working principle
　　XH sanitary manual-operation cutoff/reversal valve is opened with
　　hand-operate crank lever device. knock-down parts on the
　　valve are very few and of simple structure, so as to ensure the reliability
　　of the valve's performance.
　　
　　Standard design
　　AFC is the hand-operate valve of pneumatic cutoff/reversal valves.
　　AFC hand-operate valve can be easily switched into AFC pneumatic
　　valve by changing the hand crank with AFG drive device, and vice versa.
　　All the other parts of these two types of valve are the same.
　　
　　Material
　　Material of medium-contact parts: stainless steel AISI 316L
　　Material of other parts: stainless steel SISI 314
　　Valve lever: AISI 316L, chrome-plating treatment on the surface.
　　Material of seal part in contact with medium: ethylene propylene diene rubber(EPDM)
　　Surface treatment: fineness, polishing
　　
　　Technical parameter
　　Max. product pressure:1000kPa(10bar)
　　Min. Product pressure: vacuum
　　Range of temperature: -10℃to +140℃ (EPDM)
　　
　　Optional corollary equipment
　　a. choose screw thread gasket or clip gasket according to needed standard.
　　b. Axenic valve is available.
　　c. Stainless steel valve plate can be used instead of lip seal.
　　
　　Material class
　　For the seal of medium-contact parts and lip seal, nitrile rubbers (NBR)and
　　fluorinated rubber(FRM)are available for options.