Ductile Manhole Cover is made of ductile;
we make the manhole cover on BS EN124, Mainly our products are A15, B125, C250
and D400, sometimes also make it E600 and F900 in case of need. For A15, B125,
C250 and D400 ductile manhole covers to be used in Green belt, Pavement, Auxiliary
road, Main road and Express way. We make ductile manhole covers all by
producing line, the quality is very good, and we warmly welcome customers all
over the world to do business with us.
Ductile Manhole Cover,Ductile Iron Manhole Cover,Ductile Iron Cover And Frame,Ductile Iron Cover Zhoushan Runchun Import & Export Co., Ltd. , https://www.en124casting.com
No clogging sewage pump flow
Submersible sewage pump is even the motor, the pump is installed in the water; vertical sewage pump is installed in the pump room were the transmission medium water, sewage, hot water, etc.; automatically stir the sewage pump submersible sewage pump with Automatic mixing evenly cutting function, with more impurities in the sewage case, stainless steel submersible sewage pump that just extend the life of different materials, there is no difference in function on the nature. Non-clogged sewage pump flow: When the displacement adjustment, the maximum hourly discharge of life can be selected. Fire elevator pool drain pump flow rate of not less than 10L / s. Drainage pump lift by lifting height, pipe loss calculation is determined, then add a certain free head. Free head should adopt 0.02 ~ 0.03MPa. Drainage pump suction pipe and outlet pipe flow rate should not be less than 0.7m / s, and should not be greater than 2.0m / s. Public buildings should be used for each living drainage cistern as a unit to set up a spare pump, usually should be run interactively. Basement, equipment room, garage flushing the ground drainage, if there are two or more than two drainage pump equipment pump. Catch pool can not set the accident drain, the pump should have uninterrupted power supply; close the drainage pipe, it may not provide uninterrupted power supply, but should set the alarm device. When upgrading the sewage and waste water with larger impurities, the submersible sewage pump outlet pipes in different sumps should not be combined and discharged. Enhance the general wastewater, according to the actual situation of different submersible sewage pump sewage pipe merger discharge. When two or more pumps share one outlet pipe, a valve and a check valve shall be installed on each outlet pipe of the pump. A single pump drainage may occur when the backflow should be set check valve. Do not allow the pressure drain and the building gravity drainage pipe merged discharge. Non-clogged sewage pump to enhance large debris, the submersible sewage pump should be equipped with crushing device; when upgrading with more fibrous waste water, should adopt a large channel submersible sewage pump. Motor power is greater than or equal to 7.5kW or outlet diameter greater than or equal to DN100, the pump can be used to fix the auto-coupling device. Submersible sewage pump motor power is less than 7.5kW or outlet diameter less than DN100, the hose can be installed mobile installation. Sewage collection pond submersible sewage pump drainage, water pumps should be set fixed auto-coupling device to facilitate pump maintenance. Drainage pump should be able to automatically start and stop and on-site manual start and stop. Multiple pumps can be alternately operated in parallel, but also can be put into operation in stages.