At present, fluoroplastic-lined corrosion-resistant pumps (large pumps) produced by fluoroplastic recycling manufacturers, such as CQB fluoroplastic-driven large magnetic pump lining materials, IHF fluoroplastic pumps, FZB fluoroplastic self-priming pumps and fluorine-lined steel pipes, are all polyperfluoroethylene propylene (FEP, referred to as F46)-lined F46 pumps and have excellent corrosion resistance and good rigidity. fluoroplastic pumps are also resistant to impact, vibration and distortion, it has been widely used in the petroleum and chemical industries to transport corrosive liquids and gases. Can be used under the following conditions: temperature -80 ℃ ~ 160 ℃, pressure ≤ 16 kg/cm 2, fluorine plastic centrifugal pump vacuum range (instantaneous, normal temperature) 400mmHg column. In the process of use, it shows its unique performance. Examples of applications and benefits are as follows:

1) the use of performance and corrosion resistance is better than phenolic cement, enamel products, lining glass products and stainless steel and other materials. Especially used in the presence of strong oxidants, the service life of the above materials can be increased by one to several times, in particular, they can withstand the penetration of ether media corrosion.

2) can withstand the test of various corrosive media. Chemical pump in the use of the process of the medium, there are bromine, benzene, formaldehyde, hydrochloric acid, hydrochloride, 50% sulfuric acid, 12% NaSCN, HSCN, isopropyl ether, 22% NaOH, chlorobenzene water, p-benzenesulfonic acid, 99.5% chlorine, 95-90% tert-butyl hypochlorite, 0.51% free chlorine, 11-12% chloropropanol aqueous solution (PH = 2-3), chloropropanol, chloroacetone BB-dichloroisopropyl ether, dichloropropane, 100% benzene, hypochlorous acid, CCL4, etc.

3) In the presence of various corrosive media at the same time, it can be used even at about 160 ℃. For example, 666 chlorination solution contains benzene (100%), hypochlorous acid, hydrochloric acid and other corrosive fluoroplastic centrifugal pump media. Dry cleaners have strong organic solvents, strong oxidizing media and strong acids. Apart from F46 and F4, it is difficult to find a suitable material that can simultaneously resist alternating or simultaneous corrosion of these media.

4) There is obvious economic effect after use.

Second, the perfluoro (fluoroplastic alloy) maternity corrosion-resistant pumps (small pumps) currently produced by fluoroplastic recycling manufacturers, such as CQB fluoroplastic-driven small magnetic pumps, FSB fluoroplastic centrifugal pumps, etc. and other pump impellers and other accessories, are made of fluoroplastic alloy (F4 and F46 and a small amount of additives are mixed and processed in a certain proportion).

Fluorine plastic alloy has unparalleled diaphragm pump corrosion resistance and mechanical strength, shock resistance, vibration resistance, distortion resistance and no toxin decomposition. With this special material production of pumps and pump accessories with fluorine plastic centrifugal pump has the following advantages:

1) Corrosion resistance and high temperature resistance can transport any concentration (strong) degree of acid, alkali, oxidant and other corrosive media without damage.

2) High mechanical strength, small size, compact structure, convenient use and maintenance, smooth flow channel, high efficiency, and energy saving.

Three: fluorine plastic pump products mainly have two types, Delta a class for the perfluoro (fluorine plastic alloy) type corrosion-resistant pump, (such as small pump); a class for the full lining of fluorine plastic (F46) type corrosion-resistant pump, (this is a large pump).

Fluoroplastic centrifugal pump is designed and manufactured according to international standards and combined with non-metallic pump process. The pump body is made of metal shell lined with polytetrafluoroethylene ethylene propylene (F46), the pump cover, impeller and shaft sleeve are all made of metal inserts outcoated with fluoroplastic integral sintering and pressing, the shaft seal is made of externally mounted advanced bellows mechanical seal, the static ring is made of 99.9 alumina ceramic (or silicon nitride), and the moving ring is made of PTFE filling material, which has excellent corrosion resistance, wear resistance and sealing performance. The inlet and outlet of the pump are reinforced with cast steel body to enhance the pressure resistance of the pump. The actual use shows that the pump has the advantages of corrosion resistance, wear resistance, high temperature resistance, non-aging, high mechanical strength, stable operation, advanced and reasonable structure, strict and reliable sealing performance, convenient disassembly and maintenance, and long service life.

Selection of mechanical seal for fluorine plastic centrifugal pump:

Fluoroplastic centrifugal pump adopts the most advanced external PTFE bellows mechanical seal at present, which is characterized by compensating the radial runout of the pump shaft, single end face seal external type, easy loading and unloading, intuitive working state, good corrosion resistance and wear resistance sealing performance, multi-layer protection, and prolonging the service life of the machine seal. For conveying corrosive media containing impurity particles, single end face hard to hard (silicon carbide to silicon carbide) mechanical seal without cooling water can be used, strong alkali and hydrofluoric acid and other special corrosive media with pressureless sintered silicon carbide seal; users need to take into account the solid content in the medium and the medium special corrosive.

the use of fluorine plastic centrifugal pump:

The corrosion resistance and wear resistance of fluoroplastic centrifugal pumps have been confirmed by actual use and unanimously recognized by the majority of users. At present, they have been widely used in: corrosive medium transportation in chemical production, chlorine wastewater treatment and acid addition process in ionic membrane caustic soda project (currentlyRecycling fluoroplasticsMost of the manufacturer's ionic membrane caustic soda project pumps are selected for this process), electrolyte transportation in non-ferrous metal smelting, pickling process in automobile manufacturing, and pharmaceutical, petroleum, electricity, electroplating, dyes, pesticides, paper, food, textile and many other industries, under the temperature condition of -85 ℃ ~ 150 ℃, long-term transportation of any concentration of sulfuric acid, hydrochloric acid, hydrofluoric acid, nitric acid, aqua regia, strong alkali, strong oxidant, organic solvent, reducing agent and other strong corrosive medium without damage, is currently one of the most popular pump equipment.

1) When installing the water pump, try to shorten the length of the inlet and outlet pipes. If fluorine plastic recycling manufacturers use rubber hoses, they should install them as flat as possible to reduce bending or pipe diameter deformation. The water inlet pipe should gradually rise along the direction of water flow, and there should be no arched part, so as not to retain air, affect the work efficiency and submerge the water outlet pipe below the water surface of the water outlet pool, so as to minimize the water flow head and flow resistance.

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