The main field of pump introduction

From the pump performance range, giant pump flow up to hundreds of thousands of cubic meters per hour or more, while the micro-pump flow rate is less than dozens of milliliters per hour; pump pressure from the normal pressure up to 19.61Mpa (200kgf / cm2) above; the temperature of the liquid being transported as low as -200 degrees Celsius, the highest up to 800 degrees Celsius. Pumps deliver a wide variety of fluids, such as delivering water (clean water, sewage, etc.), fluids, acids and alkalis, suspensions, and liquid metals. In the production of the chemical and oil sectors, raw materials, semi-finished products and finished products are mostly liquids, whereas the conversion of raw materials into semi-finished and finished products requires complicated processes that pump to deliver liquids and provide chemical reactions with pressure flow In addition, in many devices also use the pump to adjust the temperature. In agricultural production, pumps are the main irrigation and drainage machinery. A vast rural areas in our country, every year in rural areas require a large number of pumps, agricultural pumps in general account for more than half of total pump output. Pumps are also the most widely used equipment in the mining and metallurgical industries. The mine needs to be drained by a pump. In the process of beneficiation, smelting and rolling, the pump is required to supply water first and so on. In the power sector, the nuclear power station needs a nuclear main pump, a secondary pump, a tertiary pump, and a thermal power plant which require a large number of boiler feed pumps, condensate pumps, circulating pumps and ash pumps. In the national defense building, the regulation of aircraft flaps, tail rudders and landing gear, the rotation of warships and tank turrets, the ups and downs of submarines, etc. require the use of pumps. High pressure and radioactive liquid, some also require the pump without any leakage. In the shipbuilding industry, the number of pumps used on each ocean going wheel is generally more than 100 and its type is also varied. Others, such as urban water supply and drainage, steam locomotive water, lubrication and cooling in machine tools, transporting drifts and dyes in the textile industry, transporting pulp in the paper industry, and transporting milk and sugar foods in the food industry, require large quantities Pump. In any case, pumps, pumps, running pumps, tanks, submarines, or drilling, mining, trains, ships, or everyday life are needed everywhere. This is the case, so the pump as a general machinery, it is a kind of mechanical industry in the product. Design Institute equipment in the design, to determine the purpose and performance of the pump and select the pump. First of all, this choice from the choice of pump type and form of the beginning, then what principle to choose the pump? What is the basis? First, understand the principle of pump selection 1, the type and performance of the selected pump in line with the device flow, head, pressure, temperature, cavitation flow, suction and other process parameters. 2, must meet the characteristics of the media requirements. Pumps that deliver flammable, explosive toxic or valuable media require dependable shaft seals or leak-free pumps such as magnetically driven pumps, diaphragm pumps, shielded pumps, pumps that deliver aggressive media, convective components require corrosion-resistant materials , Such as AFB stainless steel corrosion pump, CQF plastic magnetic drive pump. Pumps containing solid particulate media are required to have a wear-resistant material for the convection components and flush with a cleaning fluid if necessary. 3, high mechanical reliability, low noise, small vibration. 4, the economic should take into account the equipment costs, operating costs, maintenance costs and management fees the lowest total cost. 5, centrifugal pump with high speed, small size, light weight, high efficiency, large flow, simple structure, infusion without pulsation, stable performance, easy operation and maintenance features such as convenience. Therefore, in addition to the following circumstances, the centrifugal pump should be used as much as possible: a, a measurement requirements, the selection of metering pumps. b, high lift requirements, small flow and no suitable small flow high lift centrifugal pump can be used, you can choose reciprocating pump, such as cavitation less demanding can also use the vortex pump. c, low lift, large flow, the choice of axial flow pump and mixed flow pump. d, medium viscosity (greater than 650 ~ 1000mm2 / s), consider the choice of rotor pump or reciprocating pump (gear pump, screw pump). e, 75% gas content of the medium, the flow is smaller and the viscosity is less than 37.4mm2 / s, the optional vortex pump. f, on the occasion of frequent start or pump inconvenience occasion, should use self-priming pump performance, such as self-priming centrifugal pump, self-priming vortex pump, pneumatic (electric) diaphragm pump. Second, to know the basic pump selection Pump selection basis, should be based on process, water supply and drainage requirements, to be considered from five aspects, both liquid delivery capacity, device lift, liquid properties, piping layout and operating conditions. 1, the flow rate is one of the important performance of the election pump data, which is directly related to the entire plant's production capacity and delivery capacity. Such as the design process can be calculated in the pump normal, minimum, maximum three kinds of flow. Select the pump, based on the maximum flow, take into account the normal flow, in the absence of the maximum flow, it is usually desirable 1.1 times the normal flow as the maximum flow. 2, the lift system required for installation of the pump is another important performance data, generally to enlarge the 5% -10% head lift to choose. 3, the liquid properties, including the name of the liquid medium, physical properties, chemical properties and other properties, the physical properties of the temperature c density d, viscosity u, medium particle diameter and gas content, etc., which involves the system lift, effective gas Erosion margin calculation and the type of suitable pump: Chemical nature, mainly refers to the liquid medium chemical corrosion and toxicity, is the selection of pump materials and choose an important basis for the type of shaft seal. 4, the installation of piping system conditions refers to the liquid from the height of the liquid into the liquid distance to the suction side such as the lowest level, the highest level of the discharge side of some data and pipe specifications and length, material, pipe specifications, the number , Etc., in order to carry out the Department of combing head calculation and NPSH check. 5, the operating conditions are many, such as the operation of the liquid T saturated steam P, suction side pressure PS (absolute), the discharge side of the tank pressure PZ, altitude, ambient temperature operation is gap or continuous, the pump position is fixed Or removable. Third, the specific operation of pump selection Pump selection principles and selection of basic conditions, the specific operation is as follows: 1, according to the device layout, topography, water conditions, operating conditions, to determine the choice of horizontal, vertical and other types Submersible, submerged, non-clogging, self-priming, gear-type, etc.) pumps. 2, according to the nature of the liquid medium to determine the water pump, hot water pump or pump, chemical pump or corrosion-resistant pump or impurity pump, or non-clogging pump. Pumps installed in the explosive area should be based on the explosion area level, using the appropriate explosion-proof motor. 3, according to the size of the flow, to determine the menu suction pump or double suction pump; according to the level of the head, single-stage pump or multi-stage pump, high speed pump or low speed pump (air conditioning pump) Single-stage pump and multi-stage pump can also be used when the first choice of single-stage pump. 4, to determine the specific type of pump to determine what series of pumps to choose, you can press the maximum flow, (in the absence of maximum flow, usually desirable 1.1 times the normal flow as the maximum flow), take 5% -10% margin Lift the main parameters of these two properties, to determine the specific model in the spectrum or series of characteristic curves. The operation is as follows: Use the pump characteristic curve, find the required flow value on the abscissa, find the required lift value on the ordinate, from the two values ​​were drawn up and down, respectively, vertical or horizontal line, intersection of two lines just fall in the characteristic curve , Then the pump is the pump to be selected, but this ideal situation is generally small, usually encounter the following two situations: The first: the intersection point in the characteristic curve above, indicating that the flow to meet the requirements, but not enough head, this When the lift is almost the same, or a difference of about 5%, can still be used, if a lot of head difference, then choose a larger head pump. Or try to reduce the pipeline resistance loss. The second: the intersection of the curve below the characteristic curve, in the fan characteristic trapezoidal trapezoidal range, initially set this model, and then according to head difference between how much to decide whether to cut the impeller diameter, if the head difference is small, do not cut, if According to the required Q and H, according to its ns and cutting formula, cut the impeller diameter, if the intersection does not fall within the range of fan-shaped trapezoid, should choose a pump with smaller head. Pump selection, and sometimes have to consider the production process requirements, choose different shape QH characteristic curve. 5, the pump model is determined, the pump or transport medium near the water of the physical and chemical pump, need to go to the relevant product catalogs or samples, according to the model performance chart or performance curve correction to see whether the normal working point falls on the Pump priority work area? The effective NPSH is greater than (NPSH). Can also be reversed in order to NPSH geometric installation height? 6, for the delivery of liquid viscosity greater than 20mm2 / s (or density greater than 1000kg / m3), be sure to test the pump characteristics of the water into the viscosity (or the density) of the performance curve, especially for the inhalation performance and Input power carefully calculated or more nuclear. 7, to determine the number of pumps and spare rate: a, for normal operation of the pump, generally only one, because a large pump and parallel work of two small pumps, (referring to the head, the same flow), high pump efficiency In the small pump, so from the perspective of energy-saving rather choose a large pump, rather than two small pumps, but in the following cases, consider the two pumps in parallel cooperation: a large flow, a pump can not reach this flow. b, for the need to have a 50% standby rate of large pumps, you can change two smaller pump work, two spare (a total of three) c, for some large pumps, optional 70% flow pump requirements in parallel, Instead of a backup pump, the other pump still takes on 70% of the production while one pump is in service. d, the need for 24 hours continuous operation of the pump, spare pump should be three, a running, a spare, a maintenance. 8, under normal circumstances, the customer can submit the basic conditions of its election pump, given by the Division I choose or recommend better pump products. If the design institute in the design of equipment, the pump model has been determined, according to the design institute requirements configuration. Fourth, pump maintenance and management Pump should be divided into two aspects of electricity and machine, for the machine, the main maintenance records transferred out before the comparison to know. Followed by the electrical aspects, and to understand the power of each pump motor, to his control system have a certain understanding.

Door Accessories

Door accessories include Automatic Door Kits , High Speed Door Motor And Control Box, High Speed Door Accessories, Other Door Accessories. We can sell any parts of these accessories.

Automatic door kits: Our automatic door kits include 1 motor+gear reducer, 1 belt,7 meter, 1 idle pulley, Microprocessor, 4 sets of carriage blue wheels, 2 sets of floor guides,2pcs remote control, 2 sets belt clamp mounting brackets, 1 power supply harness and cable connectors, 2 locator, Aluminum track whose length is 2.08 meter, 3 meter, or 4 meter. We are a manufacturer of automatic door openers that are designed to provide people convenience. Automatic Door Systems` drive to provide that level of service is but one of the reasons why automatic doors are becoming more and more popular. Our Automatic Sliding Door systems are modern, space-saving and elegant. Automatic sliding doors have many basic functions some of which include: automatic mode with full opening width and/or reduced opening width, and exit only for traffic control. The opening of automatic doors can also be adjustable to make the opening width smaller or larger. Important safety functions such as safety sensors prevent the door from shutting if persons or objects are in the detection zone. If the door leaves are inhibited when closing, they are immediately re-opened or if the door leaves are hindered when opening, they are immediately stopped by a safety automatic reversing mechanism.

High Speed Door motor and control box: Our company have German SEW Motor, Japan Mitsubishi Controller. Our own brand Hofic servo motor and controller. Chinese famous brand SEJ motor and Holip controller. German SEW Motor and Japan Mitsubishi Controller: It is easy to find the ideal energy-efficient motor for your application at SEW. Our rolling gate servo control system is suitable for high speed and high usage soft and hard rolling gate. The whole system is in a small and light package, it has high torque and high operating speed, lower noise, high reliability, smooth and soft operating curves, it`s suitable for high speed and usage environment. SEJ motor and Holip controller: Three-phase asynchronous motor with magnetic brake has broad uses, It is suitable for various mechanical main drive and auxiliary drive, and it is also used for various required rapid stopping and correct positioning.

high speed door accessories: Driving system: High speed door Servo System motor and control, motor SNMA / SEJ +reducer+flang+encoder+control box. Other accessories: Middle aluminium bar, bottom aluminium bar, aluminium vertical track, stainless steel vertical track, brushes,round nylon strip, PVC roll, rolling steel tube complete, drum be;;s for rolling tube, side end covers, stainless steel cover, steel tubes, air bag sensor system, safety light beam, Microwave sensor 24 Gigahertz,PVC welding machine, smoke and fire sensors, PVC transparent window, magnetic loop, photocell, remote control, manual push button, sound warning alarm Led lamp traffic light.

Other door accessories: Sectional door accessories: motor 220V-380V, control box, spring break device, cable break device , aluminum alloy rope pulley, enhanced shaft bracket, air bag system, duplex enhanced guide wheel bracket.

For accessories detail information, please kindly check our detail classify.

Door Accessories,Automatic Door Kits,High Speed Door Accessories,Sliding Door Operator

Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hongfadoor.com