<Physicochemical properties> The original drug is light yellowish white crystalline powder, odorless, melting point 155-157 ° C, hardly soluble in water, soluble in organic solvents such as toluene, acetone, ethanol and methanol. The product has no acidic or basic functional groups, is stable under normal conditions, does not hydrolyze at pH 5-9, is non-corrosive, and is environmentally safe.
<Poisonous> is low toxicity to humans and animals (preparation), and the original drug is orally administered with acute LD50380 mg/kg. Preparation, rats oral acute LD501210 mg / kg, no carcinogenic, teratogenic and mutagenic effects. It has a certain effect on bees, but the leaves are rapidly photolyzed after 2-4 hours, and are easily decomposed by soil microbial metabolism.
<Formulation> 0.6%, 1%, 1.8% emulsifiable concentrate.
<Control object> Avermectin is mainly stomach poisoning and contact killing effect, almost no fumigation effect, when the pest bites or the insect body contacts the agent, enters the worm through the stomata and the claw pad, causing death, in addition to a certain drive Avoidance. Abamectin has a wide spectrum of insecticidal activity and is effective against a variety of pests and mites, especially aphids, thrips, mites, Plutella xylostella, Liriomyza, and hibiscus. Suitable for the control of crop pests such as vegetables, flowers, fruit trees, bonsai and cotton.
<Usage Method> Abamectin is a new type of natural pollution-free biological pesticide that is extracted from the soil microorganism, Streptomyces avermitilis, after being fermented in a large tank. After the test, the field concentration is between 10-20ppm, the expected control effect can be obtained, but in the field practical application, the general preparation (content is 0.6-1.8%) in the field due to the participation of various complicated factors. The application concentration is 2000-3000 times, the application amount per acre is 38-25 ml (the application liquid is 75 kg), and the residual effect period is about 7-15 days, such as with mineral oil (such as kerosene, diesel, etc.). Mixed use can reduce the dose and prolong the residual period. The amount of mineral oil mixed is about 0.25% of the pesticide.
Piston seal is a kind of seal used to seal between piston and cylinder, usually used in hydraulic system and Pressure system. The piston seal can prevent liquid and gas leakage, and also prevent external impurities from entering the system, thus maintaining the normal operation of the system.
Piston seals can be classified based on their structure and material. According to different structures, piston seals can be divided into unidirectional seals and bidirectional seals. A unidirectional seal can only prevent the leakage of liquid or gas from one direction, while a bidirectional seal can prevent the leakage of liquid or gas from both directions. According to different materials, piston seals can be divided into rubber seals, polyurethane seals, polytetrafluoroethylene seals, etc.
In hydraulic systems, piston seals are typically used to seal hydraulic cylinders and pumps. The piston seals in hydraulic systems need to have characteristics such as high temperature resistance, corrosion resistance, and wear resistance to ensure long-term stable operation of the system. In Pressure system, piston seals are usually used to seal cylinders and pumps. The piston seals in the Pressure system need to be resistant to high pressure, low temperature, wear and other characteristics to ensure the normal operation of the system.
In addition to hydraulic system and Pressure system, piston seals can also be used in other industrial fields, such as automobile, aviation, machinery, etc. In the automotive industry, piston seals are commonly used in engines to ensure normal engine operation. In the aviation industry, piston seals are commonly used in the hydraulic system of aircraft to ensure normal takeoff, landing, and flight. In the field of machinery, piston seals are commonly used in hydraulic and press machines to ensure the normal operation of the machine.
Piston Seal,Hydraulic Piston Seals,Pneumatic Piston Seal,U Ring Seals
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