Metrology pump purchase Raiders: understand it choose it
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November 14 08:07:14, 2022
Dosing pump is designed for measuring the liquid pump. The vast majority of metering pumps use both piston and diaphragm pumps and are also useful gear pumps because they maintain a constant flow rate independent of discharge pressure. There are a lot of skills and knowledge in the selection of metering pumps, the current shopping guide editor take you slowly "study" several metering pump products, hoping to help your selection. There are two kinds of metering pump flow can be adjusted and can not be adjusted, the former is more applicable. The flow rate is mainly adjusted by changing the stroke length, such as changing the crank radius, the position of the back stop point on the plunger return stroke and the gap between the plunger rod and the crosshead. The flow rate can also be adjusted by changing the reciprocating frequency or both. Although the stroke length can be adjusted from zero to maximum, but in order to ensure measurement accuracy, are generally limited to 30 ~ 100% range. Metering pump metering accuracy refers to the accuracy of flow reproducibility, usually calculated according to the maximum flow rate. In the 10 ~ 100% adjustment range, the measurement accuracy of the general metering pump is ± 1% (special metering pump accuracy is higher). Metering pump according to the different parts of the flow can be divided into plunger metering pumps, mechanical diaphragm metering pumps, hydraulic diaphragm metering pumps, bellows metering pumps. Here, we have different pumps for you to introduce several recommended HC products, and to make a summary of this type of metering pump. First, the plunger metering pump features: 1, the price is lower. 2, flow up to 76m³ / h, the flow rate in the range of 10% to 100%, measurement accuracy of ± 1%, the maximum pressure up to 350MPa. When the outlet pressure changes, the flow rate is almost unchanged. 3, can transport high viscosity medium, not suitable for conveying corrosive slurry and dangerous chemicals. 4, the shaft seal for the packing seal, there is leakage, the need to periodically adjust the packing. Filler and plunger wear, need to be pressure ring flushing and discharge packing. 5, no safety relief device. Recommended businesses: Zhejiang Ailipu Pump Co., Ltd. Products: 1, the use of fixed eccentric 2, precision casting shell, bronze worm wheel and wear-resistant ball bearings, lubricating oil lubrication of all drive parts 3, pump head and power box Completely correct separation, to prevent the power box may cause corrosion 4, the pump head can also be electric heating type, the temperature can be set 5, reasonable structure, reliable performance, stable operation, easy adjustment, easy maintenance. The main purpose: JX series plunger metering pump, is a can in accordance with process requirements, with travel in the range of 0 ~ 100% infinitely adjustable quantitative delivery of a variety of liquids, and in the maximum stroke of the measured medium accuracy ± 1% of the general machinery and equipment. Metering pump flow range of 0.8 ~ 200L / h, suitable for conveying temperature of -30 ~ 120 ℃, viscosity of 0.3 ~ 800mm2 / s without solid particles of the media. Second, the mechanical diaphragm metering pump features: 1, the price is lower. 2, no seal, no leakage. 3, can transport high-viscosity media, abrasive slurry and hazardous chemicals. 4, the diaphragm withstand high stress, lower diaphragm life. 5, the outlet pressure below 2MPa, the flow of a smaller scope; measurement accuracy of ± 5%, when the pressure from the smallest to the largest, the flow changes up to 10%. 6, no safety relief device. Recommended business: Dongguan City Shuangfeng Water Treatment Equipment Co., Ltd. Third, the hydraulic diaphragm metering pump features: 1, no passive seal, no leakage, safety relief device, easy to maintain. 2, pressure up to 35MPa; flow rate in the range of 10: 1, measurement accuracy of ± 1%; pressure increased by 6.9MPa, the flow decreased by 5% to 10%. 3, the higher the price. 4, suitable for medium viscosity medium. Recommended business: Guannan Xiangyang Chemical Machinery Factory Xiangyang JW hydraulic diaphragm metering pump Products: 1, small size, light weight; 2, the maximum flow 40L / h, the maximum pressure 5Mpa; 3, for purification, sewage treatment, laboratory , Laboratory; 4, motor power: 0.25KW speed: 1400r / min Shuangfeng 150 series mechanical diaphragm metering pump four, bellows metering pump features: 1, the price is lower. 2, no seal, no leakage. 3, the most suitable for conveying vacuum, high temperature, low temperature medium, the outlet pressure 0.4MPaG the following, the measurement accuracy is low. Recommended business: Shanghai Bosheng Pump Manufacturing Co., Ltd. 09050DZ, DS new bellows liquid metering pump Product Description: 1, no leak: no mechanical shaft seal, so there is no leakage. 2, output accuracy: water conditions, can be ± 1.5% of the high-precision. 3, can self-absorption: room temperature water conditions, suction is 1 meter. 4, to allow dry running: working chamber for the bellows, which can dry run. 5, long life: This cavity is made of polypropylene with special anti-tortuous materials, can withstand millions of times reciprocating motion. 6, good corrosion resistance: the pump body made of polypropylene, the valve used a special formula FPM, EPDM, resistant to all kinds of acid, alkali and other corrosive liquids. 7, the liquid temperature: the highest syrup temperature 60 ℃, more than 50 ℃, the maximum pressure of 20 ℃ when 1/2, more than 40 ℃ when the liquid corrosion will increase, be careful. Product Description: & nb