1, drying, fried method. Seedlings such as sand and other culture medium are planted on the concrete floor before sowing so that they can be exposed to the sun for 2 to 3 days. They can kill germs and eggs.
2, formalin disinfection. Each cubic meter of culture soil was sprayed with 400 to 500 ml of 40% formalin 50 times, and was evenly heaped and sealed with a plastic film for 48 hours.
3, carbon dioxide disinfection method. The culture soil is piled into a cone or a rectangle, and several holes are inserted at a certain distance. Every cubic meter of culture soil is injected into the hole with 3.5 g of carbon dioxide, and then the hole is plugged with soil, and then covered with a film, and the stuffing is blocked for 48 to 72 hours.
4, chloropicrin disinfection method. The culture soil is made into blocks of 30 to 40 centimeters high, 20 centimeters apart, with holes drilled in a depth of 20 centimeters with a wooden stick, 5 milliliters of chloropicrin per hole, sealed with soil, then watered, and then tightly covered with film. For 15 to 20 days, the film was repeatedly mixed and sterilized and killed.
5, potassium permanganate disinfection method. Sowing seedlings on the seedling bed, after soaking in a bed, soiling with 0.1% to 0.5% potassium permanganate solution, covering the soil with the film for 2 to 3 days, removing the film and then re-soaking and then cutting or cutting Can kill bacteria in the soil and prevent rot and blight.
Duplex filters
Describe:
Duplex filters, also called double-barrel return pipeline filters, are composed of two single-barrel filters and two six-way reversing valves, which have simple structure, easy to use, and with by-pass valve and filter core pollution clogging transmitter, in order to ensure the safety of the system.
Characteristics:
The double-barrel filter is mainly installed on the return pipeline of the hydraulic system. Various kinds of dirt such as abrasive particles produced by various hydraulic components in the working process can be intercepted by setting the oil filter of the return pipeline to avoid returning to the fuel tank again. Inhaled again by a hydraulic pump. The allowable pressure difference of the oil filter in the return pipeline is 0.3 ~ 0.5mpa. according to the different pressure level. The accuracy is determined according to the oil contamination requirement. In the working process, when the filter core is clogged to a certain extent and the filter core needs to be cleaned or replaced, it is necessary to stop the mainframe operation to replace the filter element, which is not only a waste of time but also can not meet the needs of continuous operation of the main engine. The double-barrel filter can effectively solve the defect of single-barrel filter and can clean or replace the filter core without stopping to ensure the mainframe work normally and continuously. When one filter core is blocked and needs to be replaced, it is not necessary to stop the mainframe operation. Just open the pressure balance valve and turn on the reversing valve. The other filter can take part in the operation and then replace the blocked filter element
Applications:
1. Metallurgy: used for filtration of rolling mill, continuous casting machine hydraulic system and various lubricating equipment.
2. Petrochemical: separation and recovery of products and intermediate products in refining and chemical production, filtration of oil well water and natural gas.
3. Textile: purification and uniform filtration of polyester melt during drawing, protection and filtration of air compressor, deoiling and dewatering of compressed gas.
4. electronics and pharmacy: reverse osmosis water, deionized water pre-treatment filtration, washing liquid and glucose pretreatment filtration.
5. Thermal power and nuclear power: gas turbine, boiler lubrication system, speed control system, bypass control system oil purification, feed water pump, fan and dust removal system purification.
6. Processing equipment: paper machinery, mining machinery, injection molding machine and large precision machinery lubrication system and compressed air purification, tobacco processing equipment and spraying equipment filtering.
Product types:
SZU-A series Duplex oil return Line Filters
· SQU-A series Duplex oil return line filters
· SWU-A series Duplex oil return line filters
· SXU-A series Duplex oil return line filters
· SRLF series Duplex oil return line filters
· SRFB series Duplex tank mounted oil return filters
· SRFA Duplex tank mounted mini-type oil return filters
· SMF series Middle pressure line filters
· SLLF series Duplex lubricant filters
· SGF series Duplex high pressure line filters
· SDRLF series Duplex high flow rate oil return line filters
Duplex Filter,Duplex Cartridge Filter,Duplex Type Edible Oil Filter,Duplex Lube Oil Filter
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