Dual-port compound exhaust valve purposes and working principle

Dual-port compound exhaust valve uses: dual-port compound exhaust valve installed in the water pipe, used to drain the air inside the pipe to exclude the normal flow of gas and affect the water, it is an energy-saving equipment, When the pipeline needs to be emptied or a vacuum is generated, air can be automatically refilled from the valve to speed drainage and protect the thin-walled copper tube from deformation and rupture, and to prevent the sewage outside the pipe from entering the pipeline through leaking. Dual-port compound exhaust valve works: 1, in the absence of water under pressure, the float and disc are landed in the casing. When the pipe is filled with water, a lot of air is discharged from the large exhaust port. 2, the air almost exhausted, the water began to float into the valve float, the float and the valve prop up again, blocking the large exhaust outlet to stop the water outflow. 3, the valve block after a large exhaust port, as long as the water and gas pipeline pressure was in the state, the valve will not fall. At this moment, if the air in the pipeline accumulates to a certain amount in the exhaust valve, the buoyancy buoyancy of the float drops and the air is discharged from the small exhaust hole of the guide rod. After the air is exhausted, the float rises again to block the small vent. 4, the pipeline negative pressure, the valve flap and float are sucked down, a large number of make-up air from the large exhaust.

Serological Pipette

Disposable serological pipettes with polyester fiber plugs are ideal for tissue culture applications. Crisp, black, highly legible permanent graduations prevent ambiguity and guarantee precise reading and accurate dispensing within ± 2%. Reverse graduations show volume removed or remaining on all pipettes larger than 1mL. Generous negative graduations provide additional pipetting volume. Yongyue's serological pipettes are made from transparent USP Class VI polystyrene sterilized by gamma irradiation. Each lot is free from pyrogens, DNases, and RNases.Yongyue's plastic serological pipettes are produced under the strictest protocols and offer the highest degree of accuracy.
The pipettes are supplied with an aerosol barrier plug that prevents both liquid and aerosols from contaminating the pipettors.
The serological pipettes are produced from crystal clear polystyrene (PS) and are color coded for easy volume identification. Available in 1mL, 2mL, 5mL, 10mL, 25mL and 50mL sizes.
In addition each Pipette now features:
Crisp and bold easy-to-read graduation marks
Reverse graduations on all volumes
Negative graduations on all volumes
1, 2 and 5mL pipettes feature one-piece construction

10, 25 and 50mL pipettes feature three-piece construction

1 ml Serological Pipette,50 ml Serological Pipette,10 ml Serological Pipette,5 ml Serological Pipette,25 ml Serological Pipette,Serological Pipette 2ml

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