ISO certification, ISO is the world's largest international standardization organization. This certification is internationally recognized. Its certification is to facilitate the exchange of goods and services between countries. Promote international exchanges and the development of friendly rela
Read Tutorial  1 , check the valve is in full open position After completion of the grease injection operation, first check whether the valve ball diameter is flush with the valve seat cavity surface. If there is a difference, the open limit bolt on the actuator should be adjusted to ensure that the va
Read TutorialTime is really fleeting, and Mr. Hai Ching has not yet had time to send blessings to everyone. But once again, the time has come to write on January 2, 2018, and it's time to really lament the time. In order to be able to better connect with others, and for everyone to have a better understand
Read TutorialCauses of Failure of Explosion Protection Distribution Boxes and Improvement Plans The explosion-proof power distribution box is to assemble the switchgear, measurement appearance, maintenance electrical appliances and auxiliary equipment in closed or semi-closed metal cabinets or screens accordi
Read Tutorial1 External environment analysis (1) security issues into safe production of coal mine is an eternal theme, but must ensure safety in production inputs, lack of investment is difficult to ensure safety in production, planned economy period, the state-owned key coal mine safety technical measures fun
Read TutorialAccording to the financial report released by Royal Dutch Shell on April 26, 2018, due to rising oil prices and increased production, Shell's first-quarter profit soared by 42% to the highest level in the past three years. However, due to the lower cash flow forecast, Shell's stock p
Read TutorialThe existence of any hidden dangers and the occurrence of accidents have their causes. The existence of hidden dangers in open pit mining accidents is mainly due to the indifferent legal concept of mine owners and employees, the lack of safety awareness, the lack of safety investment, and the low qu
Read TutorialCoal mine air shaft exhaust contains large amounts of gas. Since the gas is diluted, the concentration is generally greater than 0.5%, and the conventional techniques of using coal mine gas are not feasible. Recently, the US Environmental Protection Agency and relevant units have analyzed, identifie
Read TutorialMill widely used in mineral processing plants, refractory plants, cement, glass and other industrial sectors fine grinding of medium hardness of the material used. The operation of the ball mill belongs to the actual experience accumulation technology in production practice, and the technical experi
Read TutorialWe all know that this is the reason that plants will grow well only under the right conditions. The conditions mentioned here may be environmental conditions, soil conditions, etc. Therefore, as long as they are not satisfied, it is very likely that damage will be caused to the growth of
Read TutorialAt the 23rd Guangzhou International Lighting Exhibition, the Foshan City Health Lighting Industry Standard Alliance released two alliance standards, “Indoor Lighting LED Downlights†and “Office Lighting Design Specificationsâ€, to promote the healthy and orderly lighting indus
Read Tutorial1.LED explosion-proof lamp 100W regularly and eliminate dust and dirt in the explosion-proof lamp housing, improve the luminous efficiency and thermal performance of the lamp. Methods According to the luminaire with the protective ability of the shell, clean the water (the luminaire is above the m
Read Tutorial