Control valves, check valves, flexible rubber pipe joints and pressure gauges shall be provided on the submersible sewage pump discharge line. The National Building Standard Design Atlas 01S305 "Selection and Installation of Small Submersible Sewage Pumps" is recommended to use gate valves for control valves, and butterfly valves are also available as needed; check valves are recommended to use spherical sewage check valves. I. Product Standards Domestic manufacturers conduct manufacturing and product performance tests according to the following national or industrial standards. Submersible Sewage Pumps CJ/T 3038–95
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"Small Submersible Pump" JB/T 8092–96
Submersible Sewage Pump (Qualified Technical Conditions) HCRJ 033–1998
"Centrifugal Submersible Sewage Pump" JB/T 8857–2000
"Sewage sewage submersible pump" JB/T 5118–2001
"Submersible pump test method" GB/T 12785–2002
The products of foreign-owned enterprises and foreign imported products generally implement the following standards: Mechanical Standards EN ISO 12100
Electromagnetic Adaptation Standard EN 61000–6–2, 3
Test Standards EN ISO 9906
Second, the engineering standard "Building Water Supply and Drainage and Heating Engineering Construction Quality Acceptance Specification" GB50242-2002
3), related standard drawing 01S305 "Selection and installation of small submersible sewage pump"
Construction, installation points 1), AS, AV, QW (WQ), JYWQ various series and foreign brand submersible sewage pump have two basic forms of mobile installation and fixed installation. It can be selected according to the national building standard design atlas 01S305 "Selection and installation of small submersible sewage pump". The portable connection of the hose connection is limited to the submersible sewage pump with motor power N≤7.5kW and the outlet diameter DN≤100mm.
2) The submersible sewage pump is automatically controlled by the liquid level automatic control device. The type of liquid level automatic control device is not limited to the float type liquid level switch. If the sewage contains no or only a small amount of suspended impurities, the input type pressure sensor and the supporting secondary instrument can also be selected. The liquid level automatic control device installed in the lagoon (collection well) should be as far as possible from the water inlet.
3), single submersible sewage pump weight greater than 80kg indoor sewage pool (water collection well) above the manhole or beam on the floor should be pre-embedded hooks for installation and maintenance of the submersible sewage pump.
4) According to the current regulations of the "Code", in addition to the fabric-reinforced rubber hose for the connection part of the mobile installation hose, the submersible sewage pump discharge pipe can be made of hard water supply plastic pipe, centrifugal casting ductile iron water supply pipe, steel pipe , steel-plastic composite pipe, etc. The pressure bearing capacity of pipes and fittings shall not be less than 0.6 MPa.
5) The installation method of the submersible sewage pump used for the fire sump of the building fire elevator shall be two fixed pipes or two fixed auto-couplers, and the effective volume of the sump shall not be less than 2.0m3, submersible sewage pump The rated flow rate is not less than 36m3/h.
6) Control valves, check valves, flexible rubber pipe joints and pressure gauges shall be provided on the discharge pipe of the submersible sewage pump. The National Building Standard Design Atlas 01S305 "Selection and Installation of Small Submersible Sewage Pumps" is recommended to use gate valves for control valves, and butterfly valves are also available as needed; check valves are recommended to use spherical sewage check valves. Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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