Common Fault Analysis of QDL and QDLF Stainless Steel Light Vertical Multistage Pumps

QDL, QDLF stainless steel light vertical multistage pump with pump small size, light weight, corrosion resistance, high efficiency and so on. Pump impeller, guide vane and other components are made of stainless steel 304, the use of advanced overall stamping, argon arc welding shape, beautiful appearance, reliable performance. However, long time use of equipment, there will always be a failure, there is a failure to be promptly addressed, the following small series for everyone to analyze QDL, QDLF stainless steel light vertical multi-stage pump common fault. QDL, QDLF stainless steel light multi-stage pump common fault analysis Fault phenomenon Cause of the malfunction 1. The motor starts without turning a) power. b) The fuse burns out. c) Starter overload has been disconnected. d) The main contacts in the starter are not touching or the coil is faulty. e) The control line fuses are defective. f) The motor is faulty. 2. Once the power is turned on, the starter overload jumps immediately. A) The fuse burns out. b) starter overload contact problems. c) The cable connection is loose or defective. d) Defective motor unit. e) The pump is mechanically blocked. f) Overload setting is too low. 3. Starter overload occasionally jump open a) overload setting is too low. b) low voltage at rush hour. 4. Pump flow instability a) pump inlet pressure is too low. b) Absorber / pump partially blocked by impurities. c) Pump into the air. 5. Pump is running but no water a) Suction hose / pump blocked by impurities. b) The base or check valve is blocked in the closed position. c) suction pipe leakage. d) There is air in the suction pipe or pump. e) The motor is rotating in the wrong direction. 6. Reverse pump closed a) suction pipe leaks. b) There is a problem with the base or check valve. c) The base valve is blocked in the open or partially open position. d) Check valve leaks or clogs in partially open position. 7. Shaft seal leakage a) Shaft position is wrong. b) shaft seal is faulty. 8. Noise a) There is air in the pump. b) The pump can not rotate freely (frictional resistance) due to incorrect positioning of the inner shaft of the pump. c) There is resonance at the installation site. Further reading: Canton Fair IFAT China building water pump manufacturers ranking ptc Show article belongs to Internet industry (Xiamen) Co., Ltd. All are welcome to reprint, please indicate the source and author of: Asian pumps Network Editor: gogoing (QQ / WeChat:) Starting: (Service Hotline:)

Sodium Tripolyphosphate, Na5P3O10, Molecular weight 367.86, white powder; Melting point 622 °C. free soluble in water, aqueous solution appears ACID. It has got salient chelating capacity to metal ions of Ca and Mg etc. and can soften hard water to make suspension into solution, alkalinity, without causticity. It is an inorganic compound with formula Na5P3O10, is the sodium salt of the polyphosphate penta-anion, which is the conjugate base of triphosphoric acid.Sodium tripolyphosphate is produced by heating stoichiometric mixture of disodium phosphate, Na2HPO4, and monosodium phosphate, NaH2PO4, under carefully controlled conditions.
It has different bulk density, i.e. low density 0.35-0.6g/cm 3 , medium density 0.6-0.8g/cm3 and high density 0.8-1.0g/cm3. This product has two crystalline forms, namely phase I (high temperature phase) and phase II (low temperature phase). The chemical properties of the two phases are the same, and the difference between them lies in the thermostability, hygroscopicity, solubility and hydration heat when dissolving.
It can be used as one of the main auxiliaries for synthetic Detergent, synergist for soap; water softener, tanning agent for leather making, auxiliary for dyeing; As an effective dispersion agent for suspensions of coatings, kaolin, magnesium oxide, calcium carbonate and drilling mud etc.
As an oil contamination resistance agent in paper production; As in foodstuff industry it is used as quality improver in the process of canned food, fruit juice drinks, foodstuffs from milk or soybeans. It may tender the meat in canned ham and soften the skin of horse bean in canned horse bean. It may also serves as a softener or densifier in foodstuff industry.

Sodium Tripolyphosphate

Sodium Tripolyphosphate,Stpp Food Grade,Washing Powder Stpp,Detergents Preservatives

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