Rotary vane vacuum pump use: Remove the vial vacuum pump body carefully after unpacking, prepare accessories and instructions for safekeeping for future use. Remove the filler, wipe the surface of the pump dust, dirt. According to the packing list count the number. Rotary vane vacuum pump installed in a clean, well-ventilated, well-lit room in line with Article 4 requirements. According to the use of the pump should be installed in a certain margin of the site, in order to facilitate operation and maintenance. Pump dimensions see. Rotary vane vacuum pump can be placed on a solid flat ground, without special foundation, if necessary, can be fixed plus additional screws and solid foundation, ground screw size see. Rotary vane vacuum pump, such as close to the use of precision instruments, should consider increasing the shock device. Will be sucked vacuum vessel with a vacuum hose or flange and rotary vane vacuum pump is connected, such as the flange connection, the flange should have rubber ring groove, the form and size shown in Figure 50 is connected to the diameter of the vessel being drawn should not be less than the pump Inlet diameter, tube should be short, the joint should be less, otherwise affect the pumping speed, pipe and fittings leakage should be small. The gas volume of the container to be drawn should be adapted to the pumping speed of the pump, and the pumping speed relationship of the rotary vane vacuum pump is shown in Fig.4. It is advisable to install a vacuum valve between the pump and the vessel to be evacuated in order to control the gas flow. For the pump and recommended to install a bleed valve (or solenoid valve) to stop the pump bleed, to prevent the return oil and easy to start. Connect the power supply according to the voltage indicated on the motor label and the wiring method, and it is recommended to adopt the safety device to avoid overloading. Make sure that the rotation direction of the motor should be in the same direction as the arrow on the pump. Remove the exhaust plug and install the exhaust hood, or remove the cover of the nozzle. Rotary vacuum pump to be connected to the water cooler. Such as the pump must be pumped to remove toxic and corrosive ferrous metals gas, the vacuum oil from the chemical changes of gas, and more than room temperature and dust gas, the intake pipe should be installed in the neutralization, cooling, filtration and other related Device with the use, otherwise it will affect the rotary vane vacuum pump performance and life expectancy. Remove harmful gases, should be placed on the appropriate pipeline, the exhaust gas to the outdoor away from the work area for processing. Note: The installation should be careful to prevent iron filings, dirt, dust, etc. fall into the pump 1, rotary vane vacuum pump Note: (1) intermittent start 1-2 times to observe whether there is abnormal noise in operation and special The vibration, no problem before running. (2) Note that the oil surface should be between the two oil sight lines of the sight glass. If the oil quantity is too high, it will cause difficulty in starting, returning oil and injecting oil, otherwise it will affect the degree of vacuum. Fuel shortage should be refueling hole refueling. Pay attention to stop the pump oil level to decline, the pump continuous operation a few revolutions, the oil will rise. (3) Open the cooling water (4) Open the valve on the pump intake nozzle, the size of the opening as the case may be. 2, for the first time installed rotary vane vacuum pump, should do a test run first, then the pump should be installed without proper vibration and no special impact sound, the motor should not be overloaded, the oil temperature and ultimate vacuum should meet the technical specifications. 3, Spinning-piece vacuum pump should be shut off the valve on the inlet nozzle, with deflation valve deflated the pump, and then cut off the power, then stop water. 4, rotary vane vacuum pump in use Note: (1) Always pay attention to the oil level. (2) Open the valve slowly after starting the pump. (3) often pay attention to whether the normal pump operation, with or without special sound, the motor is overloaded operation. (4) Note that the cooling water is interrupted. (5) Note that the pump temperature rise does not exceed 40 ℃ (6) If the rotary vane vacuum pump temperature after stopping to drop below 5 ℃, the pump must be in addition to the net cold water.
Brinell hardness tester is a precision measuring instrument for measuring brinell hardness of metals .
Brinell hardness tester is mainly used for cast iron, steel, non-ferrous metals and the degree of hardness measurement of the soft material such as alloy, brinell hardness test is one of the largest dimple all Hardness Testing method, it can reflect the comprehensive performance of materials, from the sample organization microsegregation and composition is not uniform, so it is a kind of hardness test method with higher accuracy.
Brinell Hardness Tester,Portable Brinell Hardness Tester,Brinell Hardness Test Unit,Portable Hardness Tester Brinell
TROJAN (Suzhou) Technology Co., Ltd. , https://www.trojanmaterials.com