Single screw pump selection technology

Single screw pump selection technology 1, the pressure of single screw pump to determine: single screw pump maximum output pressure is based on the number of bushings that the number of bushings to determine: 1 screw pump: the maximum working pressure of 0.6 MPa; 2 Grade screw pump: maximum working pressure is 1.2 MPa; 4-level single screw pump: the maximum working pressure is 2.4 MPa; due to the different conditions of the screw pump conveying medium, please refer to Table 1 for selecting the series of bushings for media with severe abrasion. Table 1: According to the choice of the wear of the liner series Bushing wear A secondary No 0.6MPa 1.2MPa General 0.4MPa 0.8MPa Severe 0.2MPa 0.4MPa 2. Single screw pump speed selection: Single screw pump due to its structural features , Most of them are used to transport liquids with higher viscosity and particles containing liquids. Therefore, the selection of the number of revolutions is very crucial. Based on experience, we can list Table 2 and Table 3, and you can consider them according to the specific conditions. Table 2: Grindability of the screw pump according to the abrasion of the medium. Media Name Speed ​​(rpm) No fresh water, coagulant, oil, juice, meat foam, paint, soapy water, blood, glycerin 400-1000 General Mud, Liquid, industrial waste, paint, waste water (sugar), mortar, fish, wheat bran, rapeseed oil Filtered sediment 200-400 Serious stone mortar, clay, stucco, clay 50-200 * Exceptional examples of the specific media delivered and their wear characteristics are noted, taking care that the characteristics of the media vary with their concentration and temperature. * When the pump size is large, the speed should be selected lower. Table 3: Selection of pump speed according to medium viscosity Media viscosity (cst) 1-1000-100000 100000- 1000000 Speed ​​(rpm)-400 * In the choice of speed should also be based on experience, because of some other factors Also affect the choice of speed, in the final determination of the above values ​​at the same time, it is best to consult with the manufacturer. 3. Single screw pump bushing rubber material selection: Single screw pump bushing rubber products, but also a single screw pump wearing parts, and its choice of good or bad, directly affect the life of the bushing, under normal circumstances bushing The life of 3-6 months, if used improperly, the bushing may fall off from the pipe or rubber blocks. So ask us to understand the basic characteristics of rubber and rubber adaptability to different media, according to our experience listed in Table IV, Table V. Table 4: Basic characteristics of rubber Rubber properties NBR NBR Neoprene CR Fluorocarbon rubber PPM EPDM EPDM resistant to + 120 ° C + 110 ° C + 200 ° C + 150 ° C Excellent wear resistance Very good Excellent Good good aging resistance excellent excellent excellent ozone resistance excellent excellent excellent steam resistance good excellent excellent flame resistance excellent excellent excellent

Exterior Wall Cladding

Exterior Wall Cladding,Weatherboard Cladding,Exterior Paneling,Exterior Wall Panels

Jiangmen Feifan Industrial Co.,Ltd , https://www.cementboard.net