A pipette, also known as a pipette gun, is a device used to quantitatively transfer liquids. When conducting research in analytical testing, a small or trace amount of liquid is generally removed with a pipette. Pipettes can be divided into gas piston pipettes (Air-displacement pipette) and external piston pipettes (Positive-displacement pipette) according to the principle. Gas piston pipettes are mainly used for standard pipetting, and external piston pipettes are mainly used to handle special liquids such as volatile, corrosive and viscous. Many people ignore the correct use of pipettes and some of the details.
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No. Symptoms Cause Remedy 1 pump does not absorb oil 1, the suction pipe is blocked or air leaks 2, the suction height exceeds the allowable suction height of the vacuum 3, the motor reverses 4, medium viscosity is too large 1, overhauls the suction pipe 2, reduce the suction height 3, change the motor steering 4, the media warming 2 pressure gauge pointer fluctuations 1, the suction pipe leakage 2, the safety valve is not adjusted or the working pressure is too large, so that when the safety valve closed 1, check the suction pipe 2, adjust the safety valve or reduce the working pressure 3 flow down 1, the suction pipe blockage or leakage 2, screw and pump sleeve wear 3, the safety valve spring is too loose or valve and seat contact lax 4, the motor speed is not enough , Overhaul suction line 2, wear and tear should be replaced when the parts seriously 3, adjust the spring, grinding flap and valve seat 4, repair or replace the motor 4-axis power increased dramatically 1, the exhaust pipe is blocked 2, 3, the medium viscosity is too high 1, stop the pump to clean the pipeline 2, repair or replacement of parts 3, the medium temperature 5 pump vibration big 1, the pump and the motor is not the heart 2, screw and pump sets of different heart or gap 3, pump There is gas 4, the installation height is too large, the pump produces cavitation 1, adjust the concentricity 2, maintenance adjustment 3, maintenance suction pipe, to exclude air leaks 4, reducing the installation height or speed 6 Pump heating 1, the pump is serious Friction 2, the mechanical seal back to the oil hole plug 3, the oil temperature is too high 1, check the adjustment screw and pump casing 2, clear the return hole 3, appropriate to reduce the oil temperature 7 mechanical seal large oil spill 1, the assembly position is wrong 2, seal pressure Cover is not flat 3, moving ring or static seal surface bump 4, moving ring or static ring seal damage 1, re-installed as required 2, adjust the seal gland 3, grinding sealing surface or replace the new piece 4, replace the seal ring