What are the benefits of automatic recirculation valves? And for the automatic recirculation valve, how to calculate the flow design.
First of all, introduce the automatic recirculation valve: conveying high-viscosity medium: according to the size of the single screw valve, the viscosity of the medium can be transported from 37000-200000 cm. Media containing particles or fibers: particle diameter can be 30mm(not exceeding rotor eccentricity). The fiber length can be 350mm(equivalent to 0.4 rotor pitch). The maximum suction range of the automatic recirculation valve when sending water is 8 meters, and the actual use is recommended not to exceed 6.5 meters. When the valve sends high viscosity media, it should be sucked into the ceramic industry with positive pressure: clay, clay, glaze. Automatic recirculation valve is a kind of internally engaged eccentric rotary volume valve, the main components of the valve: a single head spiral rotor and a stator with double helix usually made of elastic material.
The design speed of the automatic recirculation valve is the maximum speed allowed when conveying clean water or similar non-corrosive liquid. In actual use, due to the different nature and life requirements of the medium, the selection should generally be lower than the design speed. For high viscosity and granular media, the design speed is generally 1/2-1/3 or lower, and the low speed is beneficial to the wear of the valve. However, due to the wear flow of the stator after use, the speed can be appropriately increased to compensate for the flow decline is also a common policy. The temperature of the conveying medium should be -10 ° C ~80 ° C, and can be as high as 120 ° C in special cases.
The following are applications in various industries, the energy industry: all kinds of fuel oil, oil coal slurry, coal water slurry, coal slime and nuclear waste. Sewage treatment: sewage, dirty oil, silt. Paper industry: all kinds of cellulose pulp, paint, black liquor. Its content is generally up to 40% of the medium cellar, if the solid substance in the medium is fine powder, the maximum content can reach 60% or higher can also be transported. When the transmission pressure is required to be stable and the inherent structure of the medium is not damaged, the single screw valve is the most ideal for transmission.
