SPP type chemical mixed flow pump-Fornitore globale

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SPP type chemical mixed flow pump

SPP mixed flow pump is a type of pump between centrifugal pump and axial flow pump, also known as diagonal flow pump. Suitable for forced circulation

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1SPPOverview of mixed flow pump

SPPMixed flow pump is a type of pump between centrifugal pump and axial flow pump, also known as diagonal flow pump.Suitable for forced circulation in chemical processes, seawater aquaculture, urban gas engineering, and water treatment systems.SPPPumps can economically and effectively transport high flow, low head, pure or containing certain particles, chemically neutral or corrosive liquids (strong corrosive liquids need to be specified).SPPChemical pumps have high performance and low energy consumption. The energy consumption of the pump is average throughout the entire functional range, and it can be started under closed valves without overloading the motor. The overcurrent section is large, not easy to block, the structure is tight, and the service life is long.

混流泵测试

IISPPThe difference between mixed flow pump, centrifugal pump, and axial flow pump

1）Compare based on flow rate and head

SPPThe flow rate of a mixed flow pump is larger than that of a centrifugal pump and smaller than that of an axial flow pump;

SPPThe head of a mixed flow pump is higher than that of an axial flow pump and smaller than that of a centrifugal pump;

SPPThe flow rate ranges from hundreds to thousands of tons per hour, and the lift varies from5Mi to20About meters.

2）Comparing from the way liquid flows out

When the electric motor drives the impeller to rotate,SPPIt can generate both centrifugal force and axial thrust, and is a combination of centrifugal pump and axial flow pump. Centrifugal pump impeller rotation only has centrifugal force, while axial flow pump impeller rotation only has axial thrust.

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IIIStructure of mixed flow pump

The structure of a mixed flow pump, whether it is a volute mixed flow pump or a guide vane mixed flow pump, is composed of five components: impeller, pump casing, pump shaft, bearings, and packing sealing device (Figure 3-18). The appearance of the snail shell mixed flow pump is similar to that of a centrifugal pump; The shape of the guide vane mixed flow pump is very similar to that of an axial flow pump. The shape of the mixed flow pump impeller is thick and short, and it partially resembles the impeller of a centrifugal pump; Part of it is like the impeller of an axial flow pump, with twisted blades in a spiral shape. The flow channels between the blades of the impeller are wider, and the outlet edges of the blades are inclined; It differs from the water flow conditions inside the impeller of centrifugal pumps and axial pumps. Water flows in the impeller of a mixed flow pump. It enters axially and flows out in an inclined direction, so a mixed flow pump is also called a diagonal flow pump. There are two types of pump casing structures: one is the volute shape. For example, the HB mixed flow pump is basically the same as a centrifugal pump, but its pump body is wide and installed horizontally; The other is cylindrical. For example, guide vane mixed flow pumps and agricultural discharge pumps are similar to vertical axial flow pumps, and the pump body is also equipped with guide vanes for vertical installation and use.

4Characteristics of mixed flow pump

Mixed flow pump is a type of "pull-out" structural pump, which does not require dismantling the pipeline connected to the pump body when inspecting and disassembling the impeller and shaft seal.

Equipped with precision machined pump shafts, bearings lubricated with thin oil, and protective shaft sleeves in the packing box cover.

The oil level of the bearing box can be controlled by a constant position oil cup.

The legs of the pump body can withstand any load from the pipeline and directly transmit it to the foundation. In this way, the rotor will not bend due to the load borne by the pump, ensuring the optimal service life of the bearings.

Due to the larger overcurrent area, it reduces blockage.

The rotation direction of the pump, when viewed from the drive end, is clockwise. The power drive can be either an electric motor or an internal combustion engine. The pump device can be equipped with a complete air release device, which is beneficial for the exhaust of the suction pipeline.

5Performance parameters of SPP mixed flow pump

Pump number Speed n (r/min)	impeller Code name	impeller external diameter (m)	Traffic volume Q (m³/h)	lift H (m)	Cavitation allowance (NPSH)r (m)	Motor model and power (KW)
						Density of conveying medium (kg/m)³)
						1000		1350		1840
SPP17 1/2-20 n=1450	A B C D	236 222 210 198.5	360 340 320 300	8.5 7.5 6.3 5.0	3.2 3 3 4.5	15 11 11 7.5	160L 160M 160M 132M	18.5 15 11 11	180M 160 L160M 160M	32 18.5 15 11	180L 180M 160L 160M
SPP20-25 n=1450	A B C D	270 254 240 226.5	530 500 460 430	11.2 10 8.5 15	4 3.9 3.8 5.5	22 22 18.5 15	180L 180L 180M 160L	30 30 22 18.5	200L 200L 180L 180M	30 22	200L 180L
SPP20-25 n=970	A B C	270 254 240	350 330 300	5 4.5 3.9	4 3.8 3.6	7.5 7.5 5.5	160M 160M 132M	11 11 7.5	160L 160L 160M	15 11 11	180L 160L 160L
SPP221/2-25 n=1450	A B C D	304 285 270 255	700 650 625 575	15.8 14 11.5 9.5	5 5 5 5	45 37 30 22	225M 225S 200L 180L	55 55 45 30	250M 250M 225M 200L	75 75 55 45	280S 280S 250M 225M
SPP25-25 n=1450	A B C D	338 317 300 283.5	900 850 780 725	24 21 18 14	6 5.9 6 6.1	90 75 55 45	280M 280S 250M 225M	110 90 75 75	315S 280M 280S 280S	110 75	315S 280S
SPP25-30 n=1450	A B C D	317 300 283.5	1100 1040 950 880	19.5 17 14.8 12	6.4 6 5.8 9	90 75 55 45	280M 280S 250M 225M	110 90 75 75	315S 280M 280S 250M	110 75	315S 280S
SPP25-30 n=970	A B C D	338 317 300 283.5	750 700 650 600	8.5 7.6 6.5 5.3	4.7 4 3.8 7.2	30 22 18.5 15	225M 200L₂ 200L₁ 180L	37 30 22 18.5	250M 225M 200L₂ 200L₁	45 37 30 30	280S 250M 225M 225M
SPP30-35 n=970	A B C D	405 380 360 340	1300 1200 1150 1050	12.2 11 9 7.2	4.4 4 4 6	75 55 45 30	315S 280M 280S 225M	75 75 55 45	315S 315S 280M 280S	110 90 75 55	315M2 315M1 315S 280M
SPP35-35 n=970	A B C D	472 444 420 396.5	1600 1500 1450 1300	21 317 13.5 11	5.2 5.3 5.5 7.8	132 90 75 55	315M₃ 315M₁315S 280M	160 132 110 75	355S₂315M₃ 315M₂ 315S	132 110	315M3 315M2
SPP35-40 n=970	A B C D	472 444 420 396.5	2000 1900 1800 1700	17 15 12.2 10	6 5.5 5.2 8	132 110 90 75	315M₃315M₂ 315M₁ 315S	160 160 110 90	355S₂ 355S₂ 315M₂ 315M₁	160 110	355S2 315M2
SPP35-40 n=730	A B C D	472 444 420 396.5	1500 1450 1350 1250	9.6 8.1 7 5.7	4 3.9 3.6 5.8	55 45 37 30	315S 280M 280S 250M	75 75 55 37	315M₁315M₁ 315S 280S	110 90 75 55	315M3 315M2 315M1 315S
SPP40-40 n=970	A B C D	540 507 480 453	2400 2300 2100 2000	28 22 18 14.5	7 7 7 9.8	250 185 132 110	355L 355S₃315M₃ 315M₂	250 185 160	355L 355S₃ 355S₂	250 185	355L3 355S3
SPP40-45 n=970	A B C D	540 507 480 453	3200 3000 2800 2500	20.6 18.5 16 13.5	8 7.5 7.1 7	250 200 160 132	355L 355S₁ 355S₂ 315M₃	220 185	335M₃ 355S	250	355L
SPP40-45 n=730	A B C D	540 507 480 453	2400 2200 2000 1800	11.6 10.9 9.5 8	6 5.4 5 8	110 90 75 55	315M₃ 315M₃ 3115M₁ 315S	132 132 110 75	355S₂ 355S2 315M₃ 315M₁	185 160 132 110	355M 355S₄ 355S₂ 315M₃
SPP45-50 n=730	A B C D	608 571 540 510	3300 3100 2900 2600	15 .8 13.8 12 10.2	5.2 5 5 7.3	185 160 132 110	355M 355S₄ 355S₃ 315M₂	160 132	355S₄ 355S₂	185	355M
SPP45-50 n=580	A B C D	608 570 540 510	2600 2500 2300 2200	10 8.6 7.8 6	3.4 3.1 3 5.8	90 75 75 55	355S₂ 315M₃ 315M₃ 315M₃	132 110 90 75	355M 355S₄ 355S₂ 315M₃	160 132 90	355L 355M 355S₂
SPP50-50 n=730	A B C D	675 634 600 567	3700 3400 3200 3000	24 20 16 12.8	5 5 5 7	185 132	344M 355S₂	185	355M
SPP50-55 n=730	A B C D	675 634 600 567	4500 4300 4000 3800	20 17.5 15 12.3	5.5 5.1 5 7.6	185	355M
SPP50-55 n=580	A B C D	675 634 600 567	3600 3400 3200 3000	12.6 11 9.4 8	3.8 3.4 3.1 5.8	160 132 110 90	355L 355M 355S₄ 355S₂	160 132	355L 355M	160	355L
SPP55-60 n=580	A B C D	742 696 660 623	4800 4400 4100 3900	15 13.5 11.5 9.5	5.2 5 4.0 7 2	132 132	355M 355M
SPP55～60 n=480	A B C D	742 696 660 623	3900 3700 3400 3200	10.5 9.1 8 6.5	3.5 3.2 2.9 2.7
SPP60-60 n=580	A B C D	810 760 720 680	5200 5000 4500 4300	21.5 17 14 11	5.6 5.6 5.6 7.8	Note: 1. When placing an order. The pump name is determined by the pump model and impeller Number composition. For example: SPP20-25 pump, impeller code A, The pump name is SPP20-25A. 2. Pumps larger than SPP50-50 specifications, blank spaces in this table The motor model will be separately agreed upon during ordering.
SPP60-65 n=580	A B C D	810 760 720 680	6200 5800 5400 5100	17 15 13 10.5	6.2 6 5.8 8
SPP60-65 n=480	A B C D	810 760 720 680	5200 4900 4700 4400	11.5 10 8.5 7	4.3 3.8 3.7 7

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