Stall Used to position the open metal sash. Generally installed on the lower edge of the sash, and some are also designed to be used with the hinge. It is made of brass, low carbon steel, zinc alloy, stainless steel and other materials, and the surface is plated with nickel, chromium or zinc. The varieties include eye support, arm support, rocking support, and mobile support. Hinge Also known as the hinge. It is the connecting piece between the door and the door frame, the window and the window frame, which can make the door and the window rotate freely to open and close, and the hinge is formed by connecting the blade and the pin shaft. The blades are stamped from low carbon steel and are free to rotate around the pin. The pin is made of low carbon cold drawn wire or spring wire. The hinged varieties have common hinges, spring hinges (Fig. 4) and hinged hinges. Handle Used to open and close metal sashes. Generally installed in the middle of the edge of the sash, and some are also designed to interlock with the bolt mechanism. It is made of brass, low carbon steel, zinc alloy, stainless steel and other materials, and the surface is plated with nickel, chromium or zinc. We have two type gear pumps: oil gear pump and bitumen gear pump. oil gear pumps are divided into helical gear pumps and circular gear pumps. gear oil pump usually be used to transfer lubricating oil, if pump with bronze gear, pump also been used to transfer diesel fuel oil. pump have large flow rate and high pressure,strong suction. bitumen gear pump have three material: cast iron, cast steel and stainless steel. bitumen gear pump can bear 300 degree high temperature, pump have heat insulation jacket, can injuction hot water, hot oil and steam in to jacket circulation, keep pump warm, to prevent asphalt crystallization. Oil Gear Pump,Gear Oil Pump,Gear Lube Pump,Gear Lube Oil Pump Hengshui Yuanhan Trading Co.,Ltd , https://www.hengshuiyuanhanpump.com