Vientiane exhaust hood PP special material developed three Vientiane exhaust hood exhaust pipe fittings and joints: polypropylene (PP) made of polypropylene has good chemical stability, chemical erosion and contamination resistance Royal Good; end cap: polycarbonate (PC) manufacturing, polycarbonate has excellent corrosion resistance and heat resistance, strength, 110 ° high temperature flue gas environment without distortion, excellent transparency. Exhaust valve can adjust the built-in activity for stepless adjustment, can ensure maximum performance exhaust system in a suitable place. Connection method: the universal cover the lower part of the bracket portion square steel box-insert port, self drilling screws fixing four, joint activities of the cross-section plane movable valve mounted inside the joint and joint cavity valve with precision by a font continuous stepless adjustment knob. Description: universal exhaust hood means the process is mainly used to quickly discharge experiments or generated in the production of small-scale dust, heat, volatile gases, harmful gases and other small particulate matter floating spin or gas. Which is one of the essential laboratory safety equipment. In biology, chemistry laboratory, often highly toxic, corrosive, flammable and explosive chemicals in direct contact, often using fragile glass and ceramic utensils and the gas, water, electricity and other high-temperature electric equipment Under the environment of intense and detailed work, therefore, we must attach great importance to safety. Through a variety of harmful gases university laboratory analysis, we proposed to strengthen laboratory management recommendations to promote the university laboratory and scientific management, to protect the operator and the health of those around them, protecting the atmosphere around the lab. Construction: 1. each member the choice of materials and workmanship is very fine, corrosion resistant, high solid, good flexibility. Joints, cover head droop phenomenon does not occur, the direction can be freely positioned according to user requirements, to meet customer needs. 2. PP material joint selection of high-density and high-density rubber seal joints of not aging, easy to disassemble, restructuring and cleaning. 3. Unique 360 ??° rotating device 4. The exhaust hood telescopic catheter using the new material extruded from PP, with exhaust hood on the market other purchased parts compared to the use of PVC, better corrosion resistance. 5. Secure the base for the high-density PVC material, forming the injection mold, non-stick together, fastness, no slackness. 6. stainless steel wall mount for each interface look no welding points, all welds are hidden inside, look more delicate. Stand base material thick, easier installation, and after installation appearance flatness, smooth without irregularities, not deformed. Universal exhaust hood specifications: pipe diameter 75mm cover mouth diameter of 375mm length 3 m telescopic pipe material: high-density PP polypropylene material.