Top and Bottom Feed Heavy Duty Lockstitch Sewing Machine

**FOXSEW Top and Bottom Feed Heavy Duty Lockstitch Sewing Machine** Ideal for a wide range of sewing applications, including heavy materials such as leather, leatherette, canvas, mattresses, sofas, car upholstery, cushions, luggage, and bags. This versatile machine is designed to handle demanding tasks with ease and efficiency. **Key Features:** 1. The needle bar linkage system combined with the top and bottom feed mechanism ensures smooth and consistent feeding during operation. 2. Equipped with a large bobbin to reduce the frequency of thread changes, saving time and increasing productivity. 3. Features an automatic lubrication system that allows the machine to reach a maximum speed of 2200 RPM. 4. A new sewing structure helps maintain low tension while sewing, resulting in cleaner and more precise stitches. 5. Includes automatic sealed lubrication in both the elevation and swing axes of the presser foot, along with a redesigned rear cover to prevent oil leakage. 6. The FX-0303CX model offers enhanced performance for heavy-duty sewing tasks. **Technical Specifications:** This professional-grade sewing machine is built to last, offering reliable performance even under heavy use. Whether you're working in a factory, workshop, or at home, the FOXSEW FX-0303 is a powerful and efficient choice for all your heavy-duty sewing needs.

U-tube

U-tube refers to a heat exchange tube shaped like a U, which is an important part of a U Type heat exchanger. Advantages of U-shaped tube: The U-shaped tube heat exchanger has only one tube plate, both ends of the tube are fixed on the same tube plate, the tube can be stretched freely, no thermal stress, and the thermal compensation performance is good; the tube side adopts double tube side, The process is longer, the flow rate is higher, the heat transfer performance is better, and the pressure bearing capacity is strong. The tube bundle can be drawn out from the shell, which is convenient for maintenance and cleaning, and the structure is simple and the cost is cheap. The disadvantage of the U-shaped tube is that due to the limitation of the radius of curvature of the bend tube, the arrangement of the heat exchange tubes is less, the innermost tube spacing of the tube bundle is relatively large, the utilization rate of the Tube Sheet is low, and the shell-side fluid is easy to form a short circuit, which is harmful to the transmission. When the tubes are leaked and damaged, only the U-shaped tubes at the periphery of the tube bundle are easy to replace. If the inner heat exchange tube is damaged, it cannot be replaced, but can only be blocked. Moreover, one damaged U-shaped tube is equivalent to two damaged tubes, and the scrap rate is relatively high.

U-tube,U Shaped Tube,Bundle Tubes,U Tube Bundle

Guangdong Jiema Energy Saving Technology Co.,Ltd , https://www.jmheatexchanger.com