Measurement and Application of Hydraulic Diaphragm Pump

Wanner Hydra-Cell is a non-traditional pump that is gradually becoming a feeding device in the chemical industry. Small size, lower price than the main advantages of API675 metering pump. Not every type of pump that is used to fill the material requires stringent specifications. These specifications are often considered as the main type of feed pump: The diaphragm pump is manufactured in accordance with API675. However, they are often considered for flow / pressure performance in spite of their high cost, but they are compatible with different media and their accuracy is unaffected by the problems of seal wear and internal leakage often found in alternative pumps. In fact, the process engineer uses a variety of pumps in the dosing unit. However, the conservative approach to choosing a pump means that their first idea was to choose a traditional type of pump. Although types of pumps such as rotary vane pumps, peristaltic pumps, piston and gear pumps, single / multi-layer centrifugal pumps have their limitations, they are still often selected. Similar but not identical In recent years, the unconventional type pump -Wanner Hydra-Cell pump has shown its advantage over the traditional type of pump. The advantages of the Hydra-Cell pump are proven in the process industry, but are still not widely recognized for special applications such as metering and feeding. The manufacturer of Hydra-Cell pumps in metering and charging technology is the two major chemical manufacturers in Germany. In the Hydra-Cell design, hydraulically powered diaphragms pull the fluid out and separate it from the drive mechanism. These features and other features are in line with the API675 pump design. Both types of pumps are safe for different media, including non-lubricated fluids and those with suspended solids. They operate at high and low pressures (for Hydra-Cell pumps up to 170bar depending on the model chosen). Both types are non-hermetically sealed so that neither type of seal will wear out. At the same time, however, the two pumps are still different and meet API675 metrology specifications with pump flow rates up to 50m3 / h or higher. The maximum Hydra-Cell pump maximum flow of only 7.6m3 / h. However, the sizes of these two pumps vary widely within the same flow and pressure range. The API765 pump has some inherent safety features and features such as stroke adjustment. Therefore, the structure of such pumps is still cumbersome even at flow rates below 10 m3 / h. Therefore, their size, size determines the high cost. Stress-free state Hydra-Cell pump through the optimal design, the structure is compact and simple. Each diaphragm separates the hydraulic units (in a single row, three columns, and five columns), which are pressurized one by one, install the diaphragm and draw liquid. The fluid pressure on each side of the diaphragm is automatically balanced so that the diaphragm is stress-free under all pressures. The API675 pump runs very slowly, delivering large volumes of fluid per stroke. The core philosophy of the Hydra-Cell design is to operate at high speed, high frequency and low flow. Not only reduce the pulse, but also by adjusting the pump speed can easily and accurately adjust the output. Controllable in a wide range, the speed ratio up to 15: 1. One of the development factors for Hydra-Cell metering and charging pumps is its small size, low cost, and high efficiency VFD drive. Hydra-Cell pumps make good use of these advantages. Pump speed and output flow into a linear relationship. Under pressure, only minor changes. If the metering system changes, the pump can react immediately. Traffic can be easily adjusted once and twice. The very nature of the Hydra-Cell pump makes it more user-friendly than traditional measuring pumps. For example, a German chemical plant uses two Hydra-CellG10 pump sets to measure 30% titanium dioxide slurry. It replaces the three-piston diaphragm pump. Its advantages are as follows: less pulsation, small space, low cost (the original purchase cost of 25%, lower energy consumption). The flow data on the receiving line is constantly adjusted to control the motor speed and ensure that the Hydra-Cell pump delivers titanium dioxide at a suitable rate. After six months of installation check the equipment, the pump group no signs of internal wear and tear. Low viscosity foaming substances such as freons, pentane and cyclopentanone are volatile and easily leak at the pump body seal. Due to the precise addition of foam during foaming, expanded polyurethane manufacturers can reduce the additional cost of traditional metering pumps by installing a variable frequency speed control Hydrea-Cell pump. Due to reliable operation and not subject to internal leakage, the maximum allowable feed error of ± 3%, such pumps can be used easily and accurately.