Dimethyl Malonate is a common organic reagents, dimethyl malonate is an important raw material for the production of pharmaceutical pipemidic acid. Foreign dimethyl malonate is mainly used as non-ethoxymethylene process production of pipaic acid raw materials, and orthoformate and urea reaction production of pipemidic acid
Monopotassium Phosphate in the application of detection and production applications play an important role
Organic Intermediate,Inorganic Salt,Dimethyl Malonate,Monopotassium Phosphate,Phosphate SJZ Chenghui chemical co ltd , https://www.chenghuichemicals.com
Take the tensile testing machine as an example to introduce some precautions:
1. Before the test, it must be ensured that the system is warmed up for more than 20 minutes so as to minimize the effects of temperature drift.
2. The buffer oil should be kept clean. If the oil level is less than two-thirds of the depth of the barrel, it should be replaced immediately.
3. Before starting the machine, check whether the frictional active parts should be filled with lubricating oil.
4. Before holding the test piece, the brake handle must be stuck, and then add the test piece and release it.
5, dynamometer main bearings do not allow refueling. The surface of the friction wheel in the gearbox must not be oiled or splashed with oil. The friction surface must be clean and clean, and the bevel block on the swing arm must not be violently impacted.
6, after the test is completed, cut off the power, and then give the test machine for surface cleaning, timely protection.
7. The maintenance of the pulling machine is performed twice a month on average.
When using and maintaining the testing machine , the equipment should be maintained and maintained according to the instructions in the instruction manual. First, the equipment can be guaranteed to be stable and reliable in the test process, and the second is to extend the service life of the equipment.