The valve assembly includes Valve Body, valve cap, valve rubber, Valve Seat, righting support, and valve spring. Valve Body And Seat are made of alloy steel, heat-treated strictly, with high facial hardness and good internal tenacity, anti-fatigue, impact resistance, and tight angle matching. The valve rubber is made of wear-resistance material, such as oil-proof rubber and epoxy resin. There are all kinds of specifications and types such as SH300 vehicle, AC-400B, 400C, ACF-700B, 350 type 35-15, international vehicle, 70-265 pump, 1000 type mud pump. Valve Body,Valve Seat,Control Valve Body,Valve Body And Seat HEBEI BAOSHI SPECIAL FLEXIBLE RUBBER CHEMICAL INDUSTRY CO., LTD. , http://www.hbbaoshihose.com
The steel fireproof rolling shutter door is a new-generation product. The curtain plate is made of hot-rolled galvanized sheet, filled with fireproof and heat-insulating material in the middle, which is smooth and beautiful, strong in steel, well sealed, stable in fire resistance and electric double-function. Compressive and compressive performance Strong steel fireproof roller blinds are connected to each other in a series of flexible panels, which are flexible and swing 90. Do not fall off. The steel baffle shutters at both ends of the baffle or the tamper-proof mechanism shall be assembled firmly. When the roller blind is in operation, the amount of movement of the adjacent curtain shall not exceed 2 mm. Steel fire shutters are straight and do not allow holes or gaps when assembled into roller blinds. This is the performance of steel fire shutters.
Fire shutter door - Li Rui Heng door industry is a professional manufacturer of fire shutter doors, steel fire shutter doors, special fire shutter doors, design, production, installation and after-sales service. The company has strong strength and its products sell well all over the country. 
Steel fire shutter door technical description