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Hebei Wo large industrial pump main flow single-stage double-suction centrifugal pumps, Francis pumps, wearable slurry pump, power plant desulfurization pumps, mining multistage centrifugal pump, filter feed pumps, pipes direct the pump , stainless steel chemical centrifugal pump, pump mechanical seal, diesel pump units and other products, and contract non-standard pumps and accessories design, production and processing, water treatment engineering design. Reputation first, quality assurance, prompt delivery. Welcome friends to negotiate business. Multi-stage pump series or parallel operation Note: 1, multi-stage pumps work in tandem to improve lift, but pay attention to the pump intensity multiple pumps in series behind the pump. 2, pump parallel operation to increase the flow in the same piping system, the flow ratio will increase in parallel with the increase in the number of units is reduced pump. 3, the same performance as the best selection of centrifugal pumps in series or parallel. 4, either in series or in parallel, a single centrifugal pump operating point should aim falls within the high zone. Hebei Wo large industrial pump main flow single-stage double-suction centrifugal pumps, Francis pumps, wearable slurry pump, power plant desulfurization pumps, mining multistage centrifugal pump, filter feed pumps, pipes direct the pump , stainless steel chemical centrifugal pump, pump mechanical seal, diesel pump units and other products, and contract non-standard pumps and accessories design, production and processing, water treatment engineering design. Reputation first, quality assurance, prompt delivery. Welcome friends to negotiate business. Stainless steel multi-stage pump seals, the integral part of the multi-stage pump, there is this and the important role it can prevent wear sleeve, making it more long service life, and convenient multi-stage pump maintenance. Devices require seals, seal leakage of the hydraulic system is to solve the problem of the most important and most effective means. If the hydraulic system seals bad, seals do not allow external leakage may occur, leakage of oil will pollute the environment; also make the air into the suction chamber, affect the smooth performance of the hydraulic pump and hydraulic actuator movement. Therefore, a reasonable choice and design of seal means in the design of the hydraulic system is important to seal the device requirements are as follows: 1. The seals within the operating pressure and a certain temperature range, should have good sealing performance, and With increasing pressure to automatically improve sealing performance. 2. The friction between the seal means and the moving parts to be small, to stabilize the coefficient of friction. 3. seals strong corrosion resistance, not aging, long working life, abrasion resistance, wear and tear to a certain extent can be automatically compensated. 4. Simple structure, easy maintenance, the seal ring has a longer lifespan multistage pump selection: the process should be based on supply and drainage requirements, be considered from five aspects, both liquid delivery quantity, unit head, liquid nature, piping layout and operating operating conditions. 1, the flow is one of the important performance data selecting a pump, which is directly related to the production capacity and delivery capacity of the entire apparatus. As process design can be calculated Institute pump properly, minimum, maximum, three kinds of traffic. When selecting the pump to the maximum flow rate as the basis, taking into account the normal flow, the maximum flow rate in the absence of, preferably 1.1 times the normal flow rate is usually as the maximum flow. 2, device system required pump head is selected another important performance data, the general use of amplified 5% -10% margin lift for selection. 3, fluid properties, including liquid media name, physical properties, chemical properties and other properties, physical properties are temperature c density d, viscosity u, the content of the medium diameter of solid particles and gas, etc., which involves the head of the system, the effective gas NPSH calculations and suitable pump types: chemical nature, mainly refers to chemical corrosive and toxic liquid medium, is the choice of material and selection of pumps that an important basis for the seal type. 4, piping layout condition device system refers to the highly liquid feeding liquid feed from the feed solution to suction side as the minimum level, the discharge side of the highest level and some data and pipe size and length, material, pipe size, quantity etc., for the Department of Computing and comb lift NPSH check. 5, the contents of many operating conditions, such as the liquid saturated steam operation force T P, the suction side pressure PS (absolute), the discharge side of the container pressure PZ, altitude, ambient temperature or continuous operation, the pump is a fixed position gap or it may shift.