Multifunctional water pump control pneumatic valve

what is a multifunctional water pump control pneumatic valve? The pump running characteristics need pneumatic valve to control? Water pump control can realize the pneumatic valve control? And its brake with traditional pneumatic valves, pneumatic butterfly valve, check valve, double speed at a constant speed as well as the gradual closing of hydraulic control check pneumatic valve in such aspects as principle, the function and what is the different in nature.
on its structure, main function, working principle, put forward the view of the above problems, for readers to see.

a, structure control the main characteristics of the pneumatic valve is cancelled pneumatic seat positioning mechanism and pneumatic disc in the middle of the upper springs, and on the under side of the pneumatic valve design guide plate, minimize the mechanical loss of the medium flow and the pneumatic disc cavity side arch under the vortex loss. With piston within the cylinder for driving element, in medium pressure itself drives the pneumatic valve disc up and down, open or close the pneumatic valve. Piston, opening and closing parts, together with the cylinder configuration on the pneumatic valve body, streamlined, wide pneumatic valve, pneumatic valve cavity can not only head loss over % less than the same products, and has good resistance to cavitation performance.
with electromagnetic solenoid reversing mechanism ( Hereinafter referred to as electromagnetic pneumatic valve) And pressure line of servo system, take control of pneumatic valve on both ends of the pressure water as the driving source, through the electrical signal instructions, any side of the pressure water pump can achieve control pneumatic valve in setting the time and speed of the pump switched on or off. Magnetic pump
2, pump running characteristics and control function characteristics and working principle of pneumatic valve, pump start
characteristics and its control
a) Zero flow starting characteristics of centrifugal pump and its control, Namely the pneumatic valve)
centrifugal pump shaft power minimum when zero flow conditions, % - rated shaft power %, so start characteristics of centrifugal pump is started (zero flow Namely the pneumatic valve) 。 After the pump to the rated speed control pneumatic valve according to the set speed slow.
how it works: (pump start-up Before) Pressure water after a delay of electromagnetic flow pneumatic valve on the piston within the cylinder cavity, and the piston inferior vena through the lower cylinder body by electromagnetic pneumatic valve leads to the atmosphere, pneumatic control valve closed at this time.
motor compensation to start over, the normal operation of pump, solenoid pneumatic valve that executes the reversing instruction, to cut off the piston cavity pressure on the water, close the cylinder bottom to atmospheric circuit, at the same time to pass through the solenoid pneumatic valve pressure water injection in cylinder piston inferior vena, open the piston chamber to atmospheric loop, the piston chamber of water on the solenoid pneumatic valve, pneumatic valve discharge control set according to the speed of the pneumatic valve slowly open, complete and meet the centrifugal pump shaft power when zero flow minimum start-up characteristics, guarantee the safe operation of pump unit. Deep well pump
b) Large axial-flow pump start-up characteristics and its control, The pneumatic valve fully open start)
axial flow pump shaft power when zero flow condition, the largest rated shaft power % ~ %, so start the characteristics of axial flow pump should be a large traffic starts ( The pneumatic valve fully open start) 。
how it works: pneumatic control valve to meet the working principle of pneumatic valve fully open axial flow pump start-up is centrifugal pump pneumatic valve to start the inverse operation, namely the solenoid pneumatic valve work first, after pneumatic valves, pumps and start again. Refer to a) A filibuster-proof majority.
before starting the axial flow pump, pneumatic valve inlet pressure is zero at this moment, pneumatic control valve with pneumatic valve water pressure pneumatic valve will open, the medium and the centrifugal pump is started using pneumatic valve inlet pressure pneumatic valve will open the media. No matter which side of the pneumatic valve medium can implement control of pneumatic valve to open or rev. , this is one of the important characteristics of pneumatic pump control valve function. Submersible pump
c) Control the starting characteristics of mixed flow pump
mixed flow pump when the zero flow condition between the above two kinds of pump shaft power, % ~ % for rated power, so the starting characteristics of mixed flow pump also should be between the above two kinds of pumps, generally can choose pump start-up and simultaneous control of pneumatic valve slowly open.
working principle: the working principle of zero discharge and control of centrifugal pump start features the same, as long as cancel delay set of pneumatic valve.

a), stop the pump and its control Control of centrifugal pump stop pump (zero flow Stop after the first close the pneumatic valve pump)
for centrifugal pump, slowly closing control pneumatic valve first, and then stop the pump is: the importance of the tube medium velocity by the rated flow rate gradually reduced to zero, minimum speed gradient, which can effectively avoid the occurrence of water hammer and the pump is going to the reversal of the pump; Pump shaft power by the rated power gradually down to the minimum operating power, is advantageous to the security unit.