The check valve is a valve which automatically opens and closes valve disc depending on the flow of the medium itself, and it is also used to prevent medium from flowing backwards. It is also called single direction valve, no-return valve and back pressure valve.
Production Size:DN40-DN600mm
Pressure range:PN10,PN16
Design Standard:
Face to Face:DIN3202/EN558-1 F6
Flange Standard:EN 1092/DIN2533
Testing Standard:EN12266
Main Material of parts:
Body:GG20/GG25/GGG45/GGG50
Disc:GG20/GG25/GGG45/GGG50/Carbon steel
Stem:2Cr13/SS304/SS316
Seat:Brass/Stainless Steel
Check valve is a kind of automatic valve,Main function of check valve is to prevent the reverse flow of the medium, prevent the reversal of the pump and drive motor, and the discharge of the container medium.
Check Valve Pilot Operated Check Valve,One Way Check Valve,Stop Check Valve,Piston Check Valve CANGZHOU HENGJIA PIPELINE CO.,LTD , http://www.hj-pipeline.com
It is understood that in order to create this new type of material, scientists have used a molecule that can be extracted from monosaccharides found in foods such as fruit, fructose, and another light-absorbing molecule called a photocatalyst. By heating this mixture, they generate a long molecular chain with a repeating unit structure that, after cooling, forms a solid plastic.
Subsequently, the researchers placed the plastic under ultraviolet light with a wavelength of 350 nanometers, which is within the wavelength range of the light of the solar radiation. This causes the light-absorbing molecules to detach from the long molecular chains, causing plastic degradation. The entire experimental process based on the proof of concept was very efficient. The plastic exposed to ultraviolet light degraded into a clean solution in only 3 hours, which fully demonstrated that the plastic had been decomposed into soluble unit structure molecules, which were degraded from the plastic. Molecules can be reused to make this new type of material, thereby reducing the need for raw materials.
"Sun" 3 hours new plastic completely degraded
Recently, scientists at North Dakota State University in the United States have created a plastic that degrades under the sunlight. The plastic can be completely degraded in only three hours, and the degraded molecules can be reused to make this new material. , to achieve recycling of materials.