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WYTSN

SN Single-Stage Double-Suction Centrifugal Pump

Flow Range ：102-6000 m³/h
Head Range：8-140 m
Motor Power：22-1250 kw
Inlet/Outlet Range ：DN150- DN800

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SN Single-stage Double Suction Centrifugal Pump

As a leading centrifugal pump manufacturer, our company has developed the SN series single-stage, double-suction centrifugal pump. This new, energy-efficient horizontal centrifugal pump is an upgraded version of traditional double-suction models and is designed for pumping clean water and other liquids free of solid particles, with physicochemical properties similar to water, at temperatures up to 80°C.

This pump centrifugal model is widely applicable in industrial plants, mining operations, municipal water supply and drainage, power stations, agricultural irrigation, and various water conservancy projects.

Structural Features

Double suction impeller design

Symmetrical water inlet on both sides of the impeller reduces the inlet flow rate and significantly improves the anti-cavitation performance.

Horizontal center-open pump body

As a hallmark of quality among leading centrifugal pump manufacturers, this horizontal centrifugal pump features an axially split casing design. This allows for direct access to the impeller and seals without the need to disconnect the pump's centrifugal system from the inlet and outlet pipelines, drastically simplifying maintenance.

Double side support bearing body

Bearing box is located at both ends of the pump body, independent lubrication system, running stability is better than the cantilever structure.

Application Scenarios

Industrial Circulation System

Power plant cooling water, steel mill continuous casting water, chemical process pumping.

Municipal water supply network

Water plant source water delivery, secondary pressurized pumping stations.

District energy system

Centralized heating primary network circulation, large building air conditioning water system.

Water conservancy infrastructure

Flood control and drainage pumping stations, agricultural irrigation hubs.

SN Single-stage Double Suction Pump vs Automatic Pump Comparison
Comparison Item	SN Single-stage Double Suction Centrifugal Pump	Automatic Pump
Structure	Double suction impeller, balanced axial force, heavy-duty structure	Single suction impeller, built-in automatic control system
Working Flow	Large flow, low flow velocity	Medium & small flow
Cavitation Performance	Low NPSHr, excellent anti-cavitation ability	Ordinary anti-cavitation performance
Start-up Mode	Manual start, requires pre-priming	Self-priming, automatic start/stop by pressure/liquid level

FAQ 1: What are the flow and head range of the WTY SN single-stage double suction centrifugal pump?

Answer:The WTY SN pump delivers a flow range from 102 to 6000 m³/h and a head range of 8 to 140 m. It adopts a split casing structure with large inlet & outlet diameters, suitable for large-volume clean water transportation in heavy-duty projects.

FAQ 2: What is the core advantage of the double suction impeller design for WTY SN pump?

Answer:The double suction impeller can automatically balance axial force, lower vibration and reduce NPSHr for better anti-cavitation performance. The split casing enables convenient rotor maintenance without detaching connecting pipelines.

FAQ 3: What are the main application scenarios for the WTY SN pump?

Answer: The WTY SN series is designed for continuous large-flow water transfer. It is widely applied in municipal water supply, industrial circulating water systems, large water diversion and HVAC cooling water projects requiring stable long-time operation.

Core structural design parameters defining SN horizontal centrifugal pump capabilities.

Model	Flow Q (m3/h)	Head H (m)	Rotary speed η (r/min)	Power p(kw)		Efficiency η (%)	(NPSH)r (m)	Weight (kg)
Model	Flow Q (m3/h)	Head H (m)	Rotary speed η (r/min)	shaft power	motor power	Efficiency η (%)	(NPSH)r (m)	Weight (kg)
150S78	126 160 198	82 78 70	2950	40 45 52	55	70 75.5 72	3.7	140
150S78A	112 144 180	67 62 55		30.1 33.4 38.5	45	68 72.6 70	3.7	140
150S50	130 160 220	52 50 40		25.2 27.3 31.1	37	73 80.4 77	3.9	130
150S50A	112 144 180	44 40 35		18.6 20.0 24.5	30	72 75.5 70
150S50B	108 133 160	38 36 32		17.2 18.0 19.4	22	65 72.5 72
200S95	183 280 324	103 95 87		83.1 91.4 102.4	132	62 79.2 75	5.3	260
200S95A	180 270 324	92 85 78		67.3 83.3 94.3	110	67 75 73
200S95B	180 260 306	82 75 68		64.8 73.8 80.9	90	62 72 70
200S63	216 280 351	69 63 53		54.8 58.3 66.7	75	74 82.7 76	5.8	230
200S63A	180 270 324	54 46 37		37.8 45.1 46.6	55	70 75 70	5.8	230
200S42	216 280 324	48 42 35		34.8 38.1 40.2	45	81 84.2 81	6	180
200S42A	198 270 310	43 36 31		30.5 33.1 34.4	37	76 80 76	6	180
250S65	360 485 612	71 65 58	1450	92.8 109.2 130.6	132	75 78.6 74	3.1	485
250S65A	342 420 540	61 48 50		77 88.5 98	90	74 77.7 75	3.1	485
250S39	360 485 612	42 39 32		54.2 61.5 67.5	75	76 83.6 79	3.2	380
250S39A	324 468 576	35 30 25		41.7 48.4 50.9	55	74 79 77	3.2	380
250S24	360 485 576	27 24 19		33.1 36.9 36.4	45	80 85.8 82	3.5	365
250S24A	324 414 482	22 20 17		25.6 27.2 27.9	37	80 83.3 80	3.5	365
250S14	360 485 576	16 14 11		19.6 21.5 22.1	30	80 85.8 78	3.8	320
250S14A	320 432 504	13 11 8		14.5 15.2 14.6	18.5	78 82.7 75	3.8	320
300S90	590 790 936	93 90 82		202 243 279	320	74 79.6 75	4.2	840
300S90A	576 756 918	86 78 70		190 216.4 247	280	71 74.2 71
300S90B	540 720 900	72 67 57		150 180 200	220	70 73 70
300S58	576 790 972	63 58 50		131.8 147.9 165.5	200	75 84.2 80	4.4	810
300S58A	529 720 893	53 49 42		100.5 118.0 130.9	160	76 82.5 78	4.4	810

Data for reference only. Please consult our technical engineers for further information.

Horizontal mounting protocol for double suction centrifugal pumps ensuring operational stability.

Install

1. Check that the water pump and motor are not damaged.

2.The installation height of the water pump, combined with the hydraulic loss of the suction pipeline and its velocity energy,
shall not exceed the allowable suction vacuum height value specified in the sample. The basic dimensions should conformn tothe installation dimensions of the pump unit.

3. Installation sequence:Place the water pump on a concrete foundation with embedded anchor bolts, adjust the level by adjusting the wedge-shapedcushion blocks between them, and tighten the anchor bolts appropriately to prevent movement.

a. Pour concrete between the foundation and the pump foot

b. After the concrete has dried and solidified, tighten the anchor bolts and recheck the levelness of the water pump.

c. Correct the concentricity between the motor shaft and the pump shaf. Align the two axes in a straight line, with a coaxialitytolerance of 0.1mm on the outer circles of the two axes, and a non-uniformity tolerance of 0.3mm along the circumference ofthe end face gap (after connecting the inlet and outlet water pipelines and conducting a trial run, it should still meet the aboverequirements)

d. After checking that the direction of rotation of the electric motor is consistent with that of the water pump, install thecoupling and connecting column pin.

4. The inlet and outlet water pipelines should be supported by additional brackets and should not be supported by the pump
body.

5. The joint surface between the water pump and the pipeline should ensure good air tightness, especially the inlet pipeline,which should be strictly ensured to be leak free, and there should be no possibility of air accumulation on the device.

6.When the water pump is installed above the inlet water level, a bottom valve can generally be installed to start the pumpVacuum water diversion method can also be used.

7. Gate valves and check valves are generally installed between the water pump and the outlet pipeline (not required for headsless than 20m), with the check valve installed behind the gate valve.The installation method mentioned above refers to water pump units that do not come with a common baseInstall a pump with a common base and adjust the level of the unit using wedge-shaped shims between the base and theconcrete foundation. Then pour concrete in between. The installation principles and requirements are the same as those for
units without a common base.

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+86 198 1685 5829

Sales Representative：+39 349 721 3297

ivy@witneat.com

No. 8, North Road, Pump and Valve Industrial Zone, Dongou HE TIAN Industrial Zone

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