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S/SH open double suction centrifugal pump

Brand: Quanda Pump Valve Address: S/SH type open type double suction centrifugal pump, Oubei Town, Yongjia County, Wenzhou City, Zhejiang Province Inl

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S/SH open double suction centrifugal pumpIt has high efficiency and energy saving, wide application range, axial force balance, long service life, central open structure, convenient and fast maintenance. S. SH type open single-stage double suctioncentrifugal pumpSuitable for conveying various clean or neutral or weakly corrosive liquids with trace particles. Zhongkai pump is suitable for water plants, irrigation, drainage pump stations, power stations, industrial water supply systems, air conditioning systems, fire protection systems, shipbuilding industry, and also for general use in the oil refining industry.

S/SH open double suction centrifugal pumpAdvantages Introduction

S/SH open double suction centrifugal pumpCompared with other pumps of the same type, it has the characteristics of long service life, high efficiency, reasonable structure, low operating cost, and easy installation and maintenance. It is an ideal pump for firefighting, air conditioning, chemical, water treatment, and other industries. The design pressure of the pump body is 1.6MPa and 2.0MPa. To meet the different requirements of users worldwide, the corresponding pump inlet and outlet flanges can be selected according to standards such as ANSI, PN, and IS. The inlet and outlet flanges of the pump body are located on the lower pump body, which allows the rotor to be removed without disassembling the system pipeline, making maintenance convenient. Some pump bodies adopt a dual channel design to reduce radial forces and extend the life of the seal and bearings. The hydraulic design of the impeller adopts the most advanced CFD technology, thus improving the hydraulic efficiency of the S pump. Balance the action of the impeller to ensure smooth operation of the S pump. The shaft diameter is thicker and the bearing spacing is shorter, which reduces the deflection of the shaft and extends the life of the mechanical seal and bearings. The shaft sleeve can be made of various materials to prevent corrosion and wear, and can be replaced. A replaceable wear ring is used between the pump body and impeller to prevent wear and tear of the pump body and impeller. It is easy to replace, has low maintenance costs, and ensures running clearance and high work efficiency. Both packing and mechanical seals can be used, and the sealing device can be replaced without disassembling the pump cover. The unique bearing body design of the bearing allows it to be lubricated with grease or thin oil. The design life of the bearing is over 100000 hours, and double row thrust bearings and enclosed bearings can also be used. According to the actual needs of the user, the materials for the S-shaped pump can be copper, cast iron, ductile iron, 316 stainless steel, or 416; Materials such as 7 stainless steel, bi-directional steel, Hastelloy, Monet alloy, titanium alloy, and 20 grade alloy. There are two installation methods for S-type pumps: horizontal installation and vertical installation. Vertical installation can reduce the footprint.

S/SH open double suction centrifugal pumpModel representation method

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S/SH open double suction centrifugal pumpSelection parameters

Double suction centrifugal pump model	internet trafficQ （m3/h）	liftH （m）	rotational speedn （r/min）	Power（Kw）		efficiencyη （%）	npsh （MPSH）r （m）
Double suction centrifugal pump model	internet trafficQ （m3/h）	liftH （m）	rotational speedn （r/min）	shaft power	Motor Power	efficiencyη （%）	npsh （MPSH）r （m）
100S90Double suction centrifugal pump	80	90	2950	30.1	37	65	2.5
100S90ADouble suction centrifugal pump	72	75	2950	23	30	64	2.5
150S100Double suction centrifugal pump	160	100	2950	59.8	75	73	3.5
150S78Double suction centrifugal pump	160	78	2950	45	55	75.5	3.5
150S78ADouble suction centrifugal pump	144	62	2950	33.8	45	72	3.5
150S50Double suction centrifugal pump	160	50	2950	27.3	37	80	3.9
150S50ADouble suction centrifugal pump	144	40	2950	20.9	30	75	3.9
150S50BDouble suction centrifugal pump	133	36	2950	18.6	22	70	3.9
200S95Double suction centrifugal pump	280	95	2950	91.7	110	79.2	5.3
200S95ADouble suction centrifugal pump	270	75	2950	73.5	90	75	5.3
200S63Double suction centrifugal pump	280	63	2950	58.3	75	82.7	5.8
200S63ADouble suction centrifugal pump	270	46	2950	45.1	55	75	5.8
200S42Double suction centrifugal pump	280	42	2950	38.1	45	84.2	6
200S42ADouble suction centrifugal pump	270	36	2950	33.1	37	890	6
250S65Double suction centrifugal pump	485	65	1450	109	132	78.6	3
250S65ADouble suction centrifugal pump	468	54	1450	89.4	110	77	3
250S39Double suction centrifugal pump	485	39	1450	61.5	75	83.6	3.2
250S39ADouble suction centrifugal pump	468	30.5	1450	49.3	55	79	3.2
250S24Double suction centrifugal pump	485	24	1450	36.9	45	85.8	3.5
250S24ADouble suction centrifugal pump	414	20.3	1450	27.6	37	83	3.5
250S14Double suction centrifugal pump	485	14	1450	21.5	30	85.8	3.8
250S14ADouble suction centrifugal pump	432	11	1450	15.8	18.5	82	3.8
300S110Double suction centrifugal pump	790	110	1450	295.7	440	80	4
300S90Double suction centrifugal pump	790	90	1450	242.8	315	79.6	4
300S90ADouble suction centrifugal pump	756	78	1450	217	280	74	4
300S90BDouble suction centrifugal pump	720	67	1450	180	220	73	4
300S58Double suction centrifugal pump	790	58	1450	149.9	180	84.2	4.4
300S58ADouble suction centrifugal pump	720	49	1450	118.6	160	81	4.4
300S58BDouble suction centrifugal pump	684	43	1450	100	132	80	4.4
300S32Double suction centrifugal pump	790	32	1450	79.2	110	86.8	4.6
300S32ADouble suction centrifugal pump	720	26	1450	60.7	75	84	4.6
300S19Double suction centrifugal pump	790	19	1450	47	55	86.8	5.2
300S19ADouble suction centrifugal pump	720	16	1450	39.2	45	80	5.2
300S12Double suction centrifugal pump	790	12	1450	30.4	37	84.8	5.5
300S12ADouble suction centrifugal pump	684	10	1450	23.9	30	78	5.5
350S125Double suction centrifugal pump	1260	125	1450	534	710	80.5	5.4
350S125ADouble suction centrifugal pump	1181	112	1450	462	630	78	5.4
350S125BDouble suction centrifugal pump	1098	96	1450	373	500	77	5.4
350S75Double suction centrifugal pump	1260	75	1450	303	355	85.2	5.8
350S75ADouble suction centrifugal pump	1170	65	1450	247	280	84	5.8
350S75BDouble suction centrifugal pump	1080	55	1450	197	220	82	5.8
350S44Double suction centrifugal pump	1260	44	1450	173	220	87.5	6.3
350S44ADouble suction centrifugal pump	1116	36	1450	131	160	84	6.3
350S26Double suction centrifugal pump	1260	26	1450	102	132	87.5	6.7
350S26ADouble suction centrifugal pump	1115	21.5	1450	78.8	90	83	6.7
350S16Double suction centrifugal pump	1260	16	1450	64.5	75	85.3	7.1
350S16ADouble suction centrifugal pump	1400	13.4	1450	48.8	55	48	7.1
500S98Double suction centrifugal pump	2020	98	970	678	800	79.5	4
500S98ADouble suction centrifugal pump	1872	83	970	540	630	78.5	4
500S98BDouble suction centrifugal pump	1746	74	970	452	460	78	4
500S59Double suction centrifugal pump	2020	59	970	391	450	83	4.5
500S59ADouble suction centrifugal pump	1872	49	970	333	400	75	4.5
500S59BDouble suction centrifugal pump	1746	40	970	257	315	74	4.5
500S35Double suction centrifugal pump	2020	35	970	219	280	88	4.8
500S35ADouble suction centrifugal pump	1746	27	970	151	220	85	4.8
500S22Double suction centrifugal pump	2020	22	970	144.1	185	84	5.2
500S22ADouble suction centrifugal pump	1746	17	970	101	132	80	5.2
500S13Double suction centrifugal pump	2020	13	970	86.2	110	83	5.7
600S75Double suction centrifugal pump	3170	75	970	727	800	89	7.5
600S75ADouble suction centrifugal pump	2880	65	970	580	630	88	7.5
600S47Double suction centrifugal pump	3170	47	970	465	560	88	7.5
600S32Double suction centrifugal pump	3170	32	970	310	400	89	7.5
600S32ADouble suction centrifugal pump	2880	27	970	238	280	89	7.5
600S22Double suction centrifugal pump	3170	22	970	223	280	85	7.5
600S22ADouble suction centrifugal pump	2880	18.2	970	168.5	200	84.5	7.5

S/SH open double suction centrifugal pumpinternal structure

S/SH中开双吸离心泵

S/SH type open double suctioncentrifugal pumpThe suction and discharge ports are both located below the axis of the water pump, perpendicular to the axis in the horizontal direction and the pump casing Middle opening, during maintenance, there is no need to disassemble the inlet and outlet pipelines and the motor (or other prime mover). When viewed from the coupling towards the pump, the water pump rotates in the opposite direction of the needle. If according to the user's special ordering needs, it can also be changed to clockwise needle rotation.
The main components of the S/SH type open type double suction centrifugal pump include: pump body, pump cover, impeller, shaft, double suction sealing ring, shaft sleeve, bearings, etc. Except for the material of high-quality carbon steel for the shaft, most of them are made of cast iron.
The pump body and pump cover of the S/SH type open type double suction centrifugal pump form the working chamber of the impeller. There are pipe screw holes for installing vacuum and pressure gauges on the inlet and outlet flanges, and pipe screw holes for discharging water are made at the lower part of the inlet and outlet flanges. The impeller undergoes static balance verification and is fixed with a shaft sleeve and two side shaft sleeve nuts. Its axial position can be adjusted through the shaft sleeve nuts. The axial force of the impeller is balanced by the symmetrical arrangement of its blades, and there may be some residual axial force that is borne by the coaxial end bearings. The pump shaft consists of two single rowsSupported by radial ball bearings, the bearings are installed in the bearing bodies at both ends of the pump body, lubricated with butter, and double suction sealing rings are used to reduce water leakage from the pump pressure chamber back to the suction chamber. The water pump is directly driven by an electric motor through a coupling. The shaft seal is a soft packing seal. In order to cool and lubricate the sealing chamber and prevent air leakage into the pump, there is a water seal ring between the packing. When the water pump is working, a small amount of high-pressure water flows into the packing chamber through the water seal pipe to provide a water seal.

S/SH open double suction centrifugal pumpINSTALLATION REQUIREMENTS

1. Check that the water pump and motor are undamaged.
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 conform to the installation dimensions of the pump unit.
3. Installation sequence:
① Place the water pump on a concrete foundation with embedded anchor bolts, adjust the level by adjusting the wedge-shaped cushion blocks between them, and tighten the anchor bolts appropriately to prevent movement.
② Pour concrete after the foundation and pump base.
③ After the concrete has dried and solidified, tighten the anchor bolts and recheck the levelness of the water pump.
④ Correct the concentricity between the motor shaft and the water pump shaft. Align the two axes in a straight line, with a coaxiality tolerance of 0.1mm on the outer circle of the two axes, and a non-uniformity tolerance of 0.3mm along the circumference of the end face gap (after connecting the inlet and outlet water pipelines and conducting trial operation, they should still meet the above requirements).
⑤ After checking that the direction of rotation of the electric motor is consistent with that of the water pump, install the coupling 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 junction surface between the water pump and the pipeline should ensure good air tightness, especially for the inlet pipeline, which must strictly prevent air leakage and there should be no possibility of air accumulation on the device.
If the water pump is installed above the inlet water level, a bottom valve can generally be installed to start the pump. Vacuum water diversion method can also be used.
7. After the water pump and the outlet pipeline, a gate valve and a check valve are generally installed (not required for heads less than 20 meters), 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 base.
Install a pump with a common base and adjust the level of the unit using wedge-shaped shims between the base and the concrete foundation. Then pour concrete in between. The installation principles and requirements are the same as those for units without a common base.

S/SH open double suction centrifugal pumpoperational issues

Starting and stopping of S/SH type open type double suction centrifugal pump
Before starting, rotate the rotor of the pump gently and evenly.
② Close the outlet valve and inject water into the pump (if there is no bottom valve, use a vacuum pump to evacuate and divert water) to ensure that the pump is filled with water No air pockets.
③ If the pump is equipped with a vacuum gauge or pressure gauge To turn off the rotary base connected to the pump and restart the motor Wait for the speed to return to normal before opening; Then gradually open the outlet gate valve. If the flow is too large, the gate valve can be adjusted by closing it appropriately; On the contrary, if the traffic is too low Open the gate valve wide.
④ Tighten the compression nuts evenly on the packing gland to allow the liquid to drip out At the same time, pay attention to the temperature rise at the packing chamber.
⑤ When the water pump stops running First, close the plugs of the vacuum gauge and pressure gauge, as well as the gate valve on the outlet pipeline Then turn off the power to the electric motor in compliance with
When the temperature of the environment is low, the square screw plug at the bottom of the pump body should be opened Remove it? Water To prevent freezing and cracking.
⑥ When the use is stopped for a long time The water pump should be disassembled to dry the water on the other component Apply anti rust oil on the processed surface and keep it safe.
Operation of S/SH type open type double suction centrifugal pump
① The maximum temperature of the water pump bearing should not exceed 75 ° C.
② The amount of calcium based grease used for lubricating bearings should occupy 1/3 to 1/2 of the bearing body space.
③ When the packing is worn, the packing cover can be appropriately tightened If there is excessive wear, it should be replaced.
④ Regularly inspect the shaft components Pay attention to the temperature rise of the motor bearings.
⑤ During operation If there is a whistling or other abnormal sound, stop the car immediately Check the cause Eliminate it.
⑥ Do not arbitrarily increase the speed of the water pump But it can be used to reduce the speed If the rated speed of this type of pump is n, the flow rate is Q, the head is H. The shaft power is N, and the speed is reduced to n1. After reducing the speed, the flow rate is reduced Head lift The shaft powers are Q1, H1, and N1, respectively. Their interrelationships The following formula can be used for conversion:
Q1=（n1/n）Q
H1=(n1/n)2H
N1=(n1/n)3N

S/SH open double suction centrifugal pumpAssembly and disassembly

1. Assembly of rotor components: Install the impeller, shaft sleeve, shaft sleeve nut, packing sleeve, packing ring, packing cover, water stop ring, and bearing components on the pump shaft in sequence, and install the double suction sealing ring, then install the coupling.
2. Install the rotor components onto the pump body, adjust the axial position of the impeller to the middle of the double suction sealing rings on both sides, and fix them. Tighten the bearing body cover with the fixing screws.
3. Install the packing, place the middle opening paper pad, cover the pump cover and tighten the screw tail pin, then tighten the pump cover nut, and finally install the grave material cover. But do not press the packing too tightly. If the packing is too tight, it will cause the shaft sleeve to heat up and consume a lot of power. Also, do not press it too loosely. If it is too loose, it will cause liquid leakage and reduce the efficiency of the water pump.
After assembly, rotate the pump shaft by hand without any rubbing, and the rotation should be smooth and even. Disassembly can be carried out in the reverse order of the above assembly.

S/SH open double suction centrifugal pumpTroubleshooting method

fault

reason

Elimination methods

1、 The pump does not absorb water, and the pointers of the pressure gauge and vacuum gauge jump violently.

1.Insufficient water injection;

2.Pipeline or instrument leakage.

1.Inject water into the pump again;

2.Tighten and block the leak.

2、 The pump does not absorb water, and the vacuum gauge shows the height Vacuum.

1The bottom valve is not open or has been clogged;

2The resistance of the suction pipeline is too high;

3The water absorption height is too high.

1Correct or replace the bottom valve;

2Clean or replace the suction pipe;

3Reduce the water absorption height.

3、 The pump is not producing water, and the pressure gauge shows pressure.

1The resistance of the water outlet pipeline is too high;

2The rotation direction is incorrect;

3Impeller blockage;

4The rotational speed is insufficient.

1Inspect or shorten the water outlet pipeline;

2Correct the rotation direction of the electric motor;

3Clean the impeller;

4Increase the rotational speed.

4、 Insufficient flow or too low head.

1Impeller or outlet pipe blockage;

2Excessive wear of the double suction sealing ring or damage to the impeller;

3The speed is lower than the specified value.

1Clean the impeller or pipeline;

2Replace damaged parts;

3Adjust to the rated speed.

5、 The pump consumes too much power.

1The packing is pressed too tightly;

2Friction between impeller and double suction seal is damaged;

3Excessive traffic.

1Loosen the packing gland;

2Check the cause and eliminate mechanical friction;

3Adjust the outlet valve to operate within the specified range.

6、 The internal sound of the pump is abnormal, and the pump cannot fill water.

1Excessive resistance in the suction pipe;

2Excessive water absorption height:

3There is air intake at the water absorption point;

4The temperature of the liquid being sucked in is too high;

5Excessive flow leads to cavitation phenomenon.

1Clean the suction pipe and bottom valve;

2Reduce the water absorption height;

3Check the bottom valve; Reduce the water absorption height,

Block the leakage area;

5Reduce the temperature of the liquid; Adjust the outlet valve to operate within the specified performance range.

7、 The pump is vibrating abnormally.

1Pump cavitation occurs;

2Uneven impeller;

3The pump shaft is not concentric with the motor shaft;

4The foot screw is loose.

1Adjust the outlet valve to operate within the specified performance range;

2Impeller calibration static balance:

3Correct the coaxiality between the pump shaft and the motor shaft;

4Tighten the foot screws.

8、 The bearing is overheated.

1There is no oil inside the bearing;

2The pump shaft and motor shaft are not on the same centerline.

1Inspect and clean the bearing body, and add lubricating oil;

2Correct the coaxiality of the two axes so that they are on the same centerline.

Please provide as much as possible for ordering: 1. Model 2. Diameter 3. Head (m) 4. Flow rate 5. Motor power (KW) 6. Speed (R/min) 7. Material with accessories 8. Voltage (V)

Welcome to visit our Quanda Pump Valve【www.quandabf.cn】If you have any questions You can call us and we will do our best to provide you with high-quality service.

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