China Pumping Solutions Leader
Stainless steel pneumatic diaphragm pump flow characteristics refers to the medium flow through the valve relative flow and displacement (the relative opening of the valve) between the relationship, the ideal flow characteristics are mainly linear, such as percentage (logarithm), parabola and fast open 4 kinds. Commonly used ideal flow characteristics only straight line, equal percentage (logarithm), fast open three.
Specific consideration from the following aspects:
(1) Analyze and select the adjustment quality of the adjustment system;
(2) Consider from the process piping situation;
(3) From the load change analysis
Selection mode
Valve body type is an important link in the selection of diaphragm pump. Diaphragm pump valve body of many kinds.
(1) The spool shape structure is mainly considered according to the selected flow characteristics and unbalance force and other factors.
(2) Wear resistance: when the fluid medium is a suspension containing high concentration of wear particles.
(3) corrosion resistance: due to the corrosive medium, in the case of meeting the adjustment function, try to choose simple valve structure.
(4) the temperature and pressure of the medium: when the temperature and pressure of the medium are high and change greatly, the material of the valve core and valve seat should be selected by the small change of temperature and pressure of the valve.
2, diaphragm pump selection
(1) Consideration of output force
No matter what type of actuator, its output force is effective for overcoming the load (mainly refers to the unbalanced force and unbalanced moment plus the effect of friction, sealing force, gravity and other related forces).
(2) Determine the type of actuator
Stainless steel pneumatic diaphragm pump cylinder head part mainly by a diaphragm will be transported liquid and working liquid separated, when the diaphragm to drive mechanism side movement, pump cylinder work for negative pressure and suction liquid, when the diaphragm to the other side of the movement, then discharge liquid. The liquid to be transported in the pump cylinder is separated by the diaphragm and the working liquid, only with the pump cylinder, suction valve, discharge valve and diaphragm pump side contact, and do not contact the plunger and sealing device, which makes the plunger and other important parts completely in the oil medium work, in good working condition.
