Comparison of screw pump and gear pump advantages and disadvantages

First, the advantages of gear pump Reliable structure, stable work, low cost, non-corrosive oil can be transported and other viscous medium; pump itself comes with safety valve, the transmission medium head higher. Second, the shortcomings of the gear pump Not suitable for conveying liquid containing solid particles and high volatility, low flash point liquid; long-term operation of the pump gear easy to wear; transmission medium flow is small. Third, the advantages of the screw pump Compact structure, flow and pressure basically no pulse, but the pressure is higher than the gear pump running smoothly, low vibration and noise; long life, high efficiency, suitable for a wide range of liquid types and viscosity. Fourth, the shortcomings of the screw pump Manufacturing and processing requirements are high, the working characteristics of the more sensitive to changes in viscosity, transmission medium flow smaller.