Anticorrosion fluoroplastic alloy self-priming pump suction culvert installation what are the requirements

Self-priming pump is known which has the function of self-priming pump, self-priming pump is a fluoroplastic alloy corrosion resistance, resistance to acid and alkali salt, imbibition etc of anti-corrosion chemical pumps, self-priming pump despite self-priming function, but there is a limit to suction, how to better let self-priming pump suction achieve the ideal effect? How is the water pipe layout is key? The suction pipe are introduced in several kinds of correct and incorrect installation method. 2, each self-priming pump should be a separate suction pipe. And should try to reduce the length of suction pipe and pipe fittings, in order to reduce the suction pipe head loss. The rest of the suction pipe can still through the design of water. Gate valves shall be set up on the suction duct, switching and maintenance. When sharing suction pipe set, suction duct should be brought in a state of positive pressure. 3, when the water when the water level is higher than the pump axis, suction pipe gate valves should be set up on the road, for the water water pump maintenance. 4, in order to let the self-priming pump suction pipe leakage phenomenon, not a little suction pipe must be completely sealed air can be inhaled, self-priming water pump suction pipe is usually used in steel tube, the welding joint or flange connection. 5, suction pipe water containing dissolved gas, due to the decrease of the pipeline pressure escape, if appear somewhere in the suction pipe pneumatosis, will form the airbag, and affect water capacity of the pipeline. When serious destruction real curtilage water absorption. And i≥ 0. Inside the gas is removed from the pump at the entrance to the top of the pump housing. 6, when the water has a large number of impurities, bell strainer shall be set up here. When the water pump for artificial irrigation or use of the water in the pressure pipeline pump is started. Suction pipe should be set on the bottom valve. Bottom valve is a check valve, filter, resistance is bigger. Bottom valve has two kinds of water and water. Underwater type bottom valve is installed at the end of the suction pipe, because is easy to be damaged, need to check, to inconvenience to use. Currently used more water type bottom valve. It has good using effect, convenient installation and maintenance, etc. When using water type bottom valve, should make the suction pipe horizontal section has enough length, so as to ensure the pump water filling starts, generating enough pipeline vacuum value. 0 to 1. 2m/s； Suction pipe during 250 ~ 1000 mm in diameter, flow rate of 1. 2 to 1. 6m/s； Suction pipe diameter was greater than 1000 mm & middot; Flow rate of 1. 5 ~ 2. 0m/s。 8, suction pipe installation within the suction well, absorbing well effective volume should not be less than one pump water pump in 5 minutes. So the submerged depth of the claim must be imported, high suspension and certain spacing. Specific size requirements for: a. Self-priming pump suction pipe import h&ge submerged depth; 0. 5 to 1 m, otherwise should be set level clapboard. b。 Self-priming pump suction pipe imports should set a bell mouth, so that the suction tube inlet flow smoothly, reduce the loss. Bell mouth big diameter D— 1. 3 to 1. 5d，( D for the suction pipe diameter) ; Bell mouth height is ( 3. 5 ~ 7) ( D - - - - - - - d) 。 c。 Edge of bell mouth from bottom hole spacing h1 ( Hanging high) Should be greater than zero. 8D。 d。 Ll not less than (bell mouth edge and the outer wall distance 75-1) D。 e. The distance between the bell mouth L2 not less than ( 5 - - - - - - - - - - - - - 2) D。
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