shield knife gate valve

此閥門適用于戶外環境惡劣的條件下使用，在閥體上附加一個防護罩起著保護閘板不受外界環境的污染腐蝕，從而增強了閘板的使用壽命。其密封原理是通過閘板在關閉到底時，閘板斜切面碰到閥體上的鍥塊使得閘板緊靠密封面起到密封效果，并且閘板底部的斜切面具有切斷介質的功能，使得閥門不易受介質的堵塞卡阻。其結構可以做成硬密封、軟密封，可以很可以根據客戶對密封要求選型。軟密封是由金屬壓套把橡膠密封圈封套反鎖在閥座密封槽內，使得密封圈不會脫落，并且取下金屬壓套可以很方便的更換橡膠密封圈，這樣不僅提高了閥門使用壽命，并且也大大節省了用戶的使用成本。該閥門具有啟閉靈活，結構輕小，密封性能，并且軟密封的密封橡膠條可以很方便的更換等特點，不僅增長了閥門使用壽命，也大大節省了資源的浪費。

This valve ,whose shield is attached to body to keep away the gate's corruption from outside condition,can be used in outside hard conditions thus increasing the life of the gate. The sealing principle is that when the gate is closed to the end ,oblique plane of gate valve encounters wedge block of gate to close to achieve sealing effect, which makes the valve less blockage media . Its structure can be made into a hard seal, soft seal. Sealing requirements base on customer's selection. Soft-seal is a metal pressure sleeve to rubber ring sealed envelope locked in the valve seat tank, making ring will not fall off, and it's convenient to take off metal pressure sleeve to replace the seat seal,besides ,not only improve the valve's service life, but also saves the user's cost . The advantage of gate valves are:open and close flexibly ,light in structure,excellence in sealing, and the soft seal rubber seal can be very easy to replace and so on, not only increases valve's life, but also saves a waste of resources.

產品型號：QBZ73H-10C、QBZ73X-10C、QBZ73W-10P

外型結構:凸耳、梅花、圓型

公稱通徑范圍：DN50-DN1200

公稱壓力范圍：國標、美標、日標、德標、英標                        

材質：鑄鋼、不銹鋼、

閘板材質：2Cr13、201、304、316、316L

連接形式：法蘭、對夾

閥座密封圈：丁腈橡膠、三元乙丙橡膠、氟橡膠

堆焊2Cr13、不銹鋼、硬質合金

填料密封：含油四氟盤根

適用介質：污水、粉體顆粒、紙漿、礦漿

Model:QBZ73H-10C、QBZ73X-10C、QBZ73W-10P

Exterior structure: lugged、   p lum、round

Nominal diameter:DN50-DN1200

Nominal pressure:national standard 、American standard 、Japanese standard、German standard 、 British standard

Material:cast steel、stainless steel

Disc:2Cr13、201、304、316、316L

Connection: flange 、wafer

Seat ring :NBR、EPDM、 vition、   2Cr13、stainless steel、hard alloy

Sealing filler: PTFE