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Stainless Steel Horizontal Multistage PumpS CUC2-20 60HZ
The development of modern industrial technology and sealing technology has made the use of pumps widely used in power, chemical, petroleum, and other industries. The sealing reliability of pumps is higher and stricter. The leakage of the sealing system of the pump will seriously affect the normal operation of the equipment. In particular, the development of high-temperature and high-pressure pumps makes the sealing requirements stricter.
The pump seal can be divided into two types, one is the single-sided seal (concentric shaft and oval shaft) and the other is double-side seal (non-concentric shaft). The leakage of the sealing system of the pump will seriously affect the normal operation of the equipment. In particular, the development of high-temperature and high-pressure pumps makes the sealing of pumps more strict.
Product parameters
| 60Hz | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Model | Driving motor P2(KW) | Q (m3/h) | 0.8 | 1.2 | 1.6 | 2 | 2.4 | 2.8 | 3.2 | 3.6 | 4 |
| CUC2-20 | 0.37 | H(m) | 24 | 23 | 22 | 20 | 19 | 17 | 16 | 14 | 12 |
With the development of industrial technology and sealing technology, pumps are widely used in power, chemical, petroleum, and other industries, and the sealing reliability of pump seals is required to be higher and stricter. The sealing of the pump plays an important role in the operation of the whole equipment. The leakage of the sealing system of the pump will seriously affect the normal operation of the equipment. In particular, the development of high-temperature and high-pressure pumps makes the sealing of pumps more strict.
Leakage point
There are many types and models of mechanical seals for pumps, but there are five main leakage points:
The seal between shaft sleeve and shaft
The seal between moving ring and shaft sleeve
The seal between moving and stationary rings
The seal between stationary ring and stationary ring seat
The seal between end cover and pump body
Material of sealing material
- Rubber asbestos packing
Rubber asbestos packing xs250 (ultimate service temperature 250 ℃), rubber asbestos packing xs350 (ultimate service temperature 350 ℃)
Applicable medium: steam, water, alkaline solution.
- Oil immersed asbestos packing
Oil immersed asbestos packing ys250 (ultimate service temperature ≤ 250 ℃), ys350 (ultimate service temperature ≤ 350 ℃): the outstanding characteristics of this product are that the packing contains lubricating oil, small friction coefficient, and large compression.
Applicable media: steam, air, industrial water, heavy petroleum products.
- PTFE asbestos packing SMF
Service temperature: - 100 ~ ＋ 250 ℃, applicable medium: corrosive medium such as weak acid and strong alkali.
- Oil impregnated cotton and hemp packing YMM
Limit service temperature: ≤ 120 ℃, applicable media: River water, tap water, groundwater, seawater, etc.
- PTFE fiber woven filler
Polytetrafluoroethylene fiber woven filler, products are divided into six brands.
In the process of use, a small amount of leakage of packing is allowed at the beginning. After using it for some time and the packing is in a relatively stable state, adjust the packing gland. Do not press too tightly at the beginning to prevent the packing from burning out.
- Carbon fiber braided packing
Carbon fiber braided packing is a new material with high strength and high modulus. It has the advantages of high strength, high modulus of elasticity, high-temperature resistance, chemical corrosion resistance, good thermal conductivity, low coefficient of thermal expansion, and self-lubricating.
During the initial operation, the packing gland should be slightly tightened to allow a small amount of medium leakage. After running for some time, it should be gradually compacted to make the packing enter a relatively stable stage. Carbon fiber polytetrafluoroethylene braided packing (the-1), if leakage is found during operation, the packing gland can be tightened many times.
- Phenolic fiber braided packing
Phenolic fiber woven sealing filler has the advantages of high-temperature resistance, acid resistance, medium corrosion resistance, adsorption, good heat insulation performance, small friction coefficient, wear resistance, and no pollution to the human body and the environment, low price, and so on. It is mainly used for packing seals of high-pressure piston pumps, high-pressure water pumps, FRP acid resistant pumps, ammonia pumps, reciprocating pumps, and deep good pumps in oil fields. See the following table for service performance:
Applicable media: acid and alkali, organic solvents, engine oil, steam, water, etc.
- Expanded graphite (flexible graphite) material
Expanded graphite (flexible graphite) material, in addition to the excellent self-lubrication, corrosion resistance, high and low-temperature resistance, radiation resistance, wear resistance, low friction coefficient, and other characteristics of graphite itself also have the advantages of softness, low density, compression resilience and a wide range of service temperature. The applicable medium pH value is 0 ~ 14.
Except for aqua regia, concentrated nitric acid concentrated sulfuric acid, and dichromate at high temperature, which is not recommended to be used, other media can be used. Before installing the stuffing box, the packing ring shall be cut with a blade, and then it can only be twisted axially to a certain extent. It shall be sleeved on the shaft and pressed into the stuffing box. The notch of each circle shall be staggered by 900 or 1200. A small amount of leakage is allowed at the beginning of the operation, and the leakage will gradually decrease with the increase of time.
- Carbon graphite material
It has good thermal conductivity, conductivity, chemical stability, thermal shock resistance, self-lubrication, and processability. In the pump industry, it is used in centrifugal pumps, canned motor pumps, diesel distribution pumps, submersible pumps, clean water pumps, high-temperature hot oil pumps, nuclear secondary pumps, boiler feed pumps, air pumps, and other end seals, expansion ring seals, mechanical seal rings, axial seals, rotating discs and other occasions.
- Rubber
Natural rubber: it has excellent flexion resistance, good wear resistance, cold resistance and insulation, and high tear strength. Aging resistance, poor weather resistance, oil resistance, and solvent resistance are also poor. The rubber pump made of natural rubber is suitable for working under 78 ℃. It is suitable for conveying a variety of abrasive slag slurry and weak acid and weak alkali solutions, but it is not suitable for conveying strong acid, oil, aliphatic and aromatic solutions.
Nitrile rubber: it is the most widely used oil-resistant rubber variety at present. It has a series of superior properties. Its wear resistance is 30 ~ 45% higher than natural rubber, and its high-temperature resistance is better than natural rubber and styrene butadiene rubber. But the weather aging resistance of nitrile rubber is poor. The maximum operating temperature of the rubber pump made of nitrile rubber is 95 ℃. The rubber pump of this kind of rubber is resistant to all kinds of animal, vegetable oil, mineral oil, and glycol.
Butyl rubber: rubber-lined pump parts made of butyl rubber, suitable for acid mud work. The maximum use temperature is 100 ℃, which can resist strong acids and bases (such as hydrochloric acid and sodium hydroxide), but high concentrations of oxidizing strong acids (such as concentrated sulfuric acid and concentrated nitric acid) will degrade butyl rubber.
Fluororubber: this kind of rubber has excellent heat resistance, ozone resistance, oil resistance, and corrosion resistance of various chemicals after vulcanization. However, fluororubber is inferior to general rubber in processing and bonding, and the price is also relatively expensive. The maximum allowable operating temperature of the rubber pump made of fluoro rubber compound can reach 170 ℃ (in an ordinary medium).
- Ceramics
Corundum ceramics (main component AI2O3): generally have extremely high hardness, good wear resistance and chemical stability, and high insulation and high melting point. In the pump industry, it is mainly used for ceramic pumps and mechanical seal rings under special working conditions. Apart from hydrofluoric acid, and some other substances containing fluorine and hot or concentrated alkaline solution, ceramics can resist almost all corrosive media, including hot concentrated nitric acid, sulfuric acid, hydrochloric acid, aqua regia, salt solution, organic solvent, etc.
Silicon nitride ceramics: the thermal shock resistance is better than alumina ceramics, and other properties are the same as alumina ceramics.
Silicon carbide ceramics: with excellent chemical corrosion resistance, high mechanical strength, good wear resistance, high-temperature resistance, good self-lubrication, low friction coefficient, and other characteristics, it can be used as high-temperature structural materials for mechanical seals of pumps, pump shafts of magnetic pumps, etc., which has more obvious advantages than ordinary ceramics.
At present, silicon carbide is an ideal friction pair material, which is combined with carbon graphite. Its dry sliding friction coefficient is smaller than that of alumina and cemented carbide, and its PV value is higher than that of alumina and cemented carbide. Silicon carbide ceramics have excellent wear resistance. Except for a few media such as hydrofluoric acid, they can resist the corrosion of almost all chemicals, including concentrated nitric acid, sulfuric acid, hydrochloric acid, and other strong corrosive liquids.
- Permanent magnet material
Ferrite permanent magnet material: compared with metal permanent magnet material, it has the advantages of high coercivity, high insulation, good resistance to external magnetic field interference, and low price. It can be used as magnetic steel for the inner and outer rotors of the magnetic pump.
Rare earth cobalt permanent magnet materials: they have excellent magnetic properties, especially the coercivity and magnetic energy product, which are the highest among the existing permanent magnet materials. They are very suitable for permanent magnets on magnetic pumps, but they are not widely used because of their high price.
Application field
① In the production of chemical and petroleum sectors, most of the raw materials, semi-finished products and finished products are liquids, and the production of semi-finished and finished raw materials into semi-finished products and finished products needs to go through complex technological processes. During these processes, pumps play a role in transporting liquids and providing pressure flow for chemical reactions. In addition, in many installations, pumps are used to adjust the temperature.
② In agricultural production, pumps are the main irrigation and drainage machinery. my country's rural areas are vast, and a large number of pumps are needed in rural areas every year. Generally speaking, agricultural pumps account for more than half of the total output of pumps.Pumps are also the most used equipment in the mining and metallurgical industries. The mine needs to be drained by pumps, and in the process of beneficiation, smelting and rolling, pumps are needed to supply water.
③ In the power sector, nuclear power plants need nuclear main pumps, secondary pumps, and tertiary pumps, and thermal power plants need a large number of boiler feed pumps, condensate pumps, oil and gas mixing pumps, circulating pumps, and ash pumps.
④ In national defense construction, the adjustment of aircraft flaps, tail rudders and landing gear, the rotation of warships and tank turrets, and the ups and downs of submarines all require pumps. High pressure and radioactive liquid, and some also require the pump without any leakage.
⑤ In short, whether it is aircraft, rockets, tanks, submarines, drilling, mining, trains, ships, or everyday life, pumps are needed everywhere, and pumps are running everywhere. That's why the pump is listed as a general-purpose machine, which is a major product in the machinery industry.
⑥ Electric pumps, i.e. pumps driven by electricity. The electric pump is composed of a pump body, a water lift pipe, a pump base, a submersible motor (including cables) and a starting protection de
