OEM Water Pump Welding Impeller

♦ 01. Molding

♦ 02. Pouring molten iron.

♦ 03. Remove the casting from the mold.

♦ 04. Sand Blasting + Machining.

♦ 05. Surface Treatment.

♦ 06. Testing.

♦ 07. Packing and Shipping.

1. Closed impeller: composed of blade and front and back cover plate. The efficiency of closed impeller is higher. It is widely used in 2BV vacuum pump. It is suitable for conveying clean liquid with small viscosity such as water and solution.

2, semi open impeller: there are generally two kinds of structures. One is the front half open type, which is composed of the rear cover plate and the blade. The impeller efficiency of the structure is low, and the sealing ring with adjustable clearance is required to improve the efficiency. The other is the rear half open, which is composed of the front cover plate and the blade. Since the sealing ring can be applied to the closed impeller, the efficiency is basically the same as that of the closed impeller. Besides conveying liquid, the blade also has the sealing effect of back blade or auxiliary impeller. The semi open impeller is suitable for conveying liquid containing suspended solids such as solid particles and fibers. Semi open impeller has lower cost, less manufacturing difficulty and adaptability. In recent years, it has been widely used in 2BV vacuum pumps for refining and chemical industry. It is also used for conveying liquid with clear water and near clean water.

3. Open impeller: impeller with only blade and blade stiffener, without front and rear cover plate. The number of open impeller blades is less. It is mainly used for conveying high viscosity liquid and slurry liquid.