1.1 Fume hood body: High quality PP (polypropylene) sheet, excellent acid and alkali resistance, and excellent weather resistance.welded by PP board. Hood cabinet (air exhaust cabinet) adopts double-layer structure, and the interlayer between the outer casing and the inner lining (interlayer width is about 100mm), which can accommodate water, electricity and gas pipeline systems, and can ensure the airtightness and protection of the cabinet. The operation table and the bottom cabinet (connected to the exhaust pipe can be designed as a suction type), that is, the table top is placed on the base cabinet, and the upper cabinet is placed on the table top.
1.2 Baffle: Its material and thickness are the same as the inner liner. The installation position and angle of the baffle can make the exhaust distribution even and there is no dead angle. In the standard condition, the proportion of exhaust air at the upper and middle and lower air outlets of the deflector is about 50±10% to ensure that the gases of different specific gravity can be effectively discharged. The air volume of the middle and lower air outlets can meet the needs of different experiments. (The shape, size and hole position of all the same type and size of fume cupboard deflector can be interchanged arbitrarily).
1.3 Baffle fixing seat: It is made of acid and alkali resistant PP(polypropylene) material molded baffle fixing seat assembly. Its performance meets the following requirements:
The back plate fixing seat and the baffle fixing knob can be easily assembled, disassembled, maintained and cleaned from the front of the cabinet
If metal screws are used during assembly, they can be hidden and isolated to avoid contact with the gas in the cabinet
The fixed seat has good stability, and its load-bearing capacity should be at least "100kg" (inclusive)
The back plate fixing seat has the mounting hole design for the distillation grid kit. The stainless steel round tube bracket can be fixed by locking and tightening to facilitate the combination of the distillation grid kit. The front of each fume cupboard is equipped with digital numbers. The machine tool is precision machined, punched and formed to ensure that the moisture of large particles does not overflow, and the cabinet can be kept clean.
1.4 Vertical sash
The glass is made of acrylic, and it is wrapped around the edges
The track is made of plastic material and is designed to be inclusive.
Each fume cupboard Sash adopts the design of double steel cables on the left and right sides. The steel cables are uncoated 304 stainless steel cables with a diameter of 2.5mm or more. (Inclusive) the above is not broken to ensure the safety of long-term use
Adopting a single counterweight box design, its up and down travel tool track is limited
Made of PP plastic material, the conical constricted air collecting hood is formed with a rectangular opening at the bottom. The diameter of the outlet pipe at the top of the fume hood is about 2*∮12", and the height of the outlet connecting pipe is more than 50mm (inclusive), which is convenient for air duct casing. Connection, the gas collecting hood has a good conical gas gathering angle and smoothness, the ratio of the length of the bottom elongated opening to the diameter of the top circular outlet is at least 2:1, and the conical angle is at least 30 degrees (inclusive) or more. In order to obtain good gas gathering uniformity and low pressure loss
The full-cover lamp holder is made of 1.0mm thick (and above) number 304 stainless steel sheet machine (with heat dissipation hole design), and the bottom is equipped with a 5mm thick matte acrylic glass, which can isolate the contact with the gas in the cabinet. , and has the function of pressure relief port.