Changsha Zhonglian Pump Industry Co., Ltd.

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Having 26 series -312 varieties - over 1000 pump models

Focused on water pump research and development manufacturing for 36 years

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SAP-type single-stage double-suction horizontal split-case pump

SAP-type single-stage double-suction horizontal split-case pump

Flow rate: 72–20,000 m³/h

Head: 6.8–186 m

Power: 11–1800 kW

Efficiency: 71%–90.5%

Pump weight: 120–17,800 kg

Cavitation margin: 2.7–13.2 m

Price: 49,500–499,000

The SAP-type single-stage, double-suction, horizontal split-case pump is a new double-suction, split-case centrifugal pump developed by Zhonglian Pump Industry—a manufacturer of split-case pumps—based on the SA-type double-suction, split-case pump, with optimized structural design. This pump is used for conveying clean water free of solid particles, as well as other liquids whose physical and chemical properties are similar to those of water. The temperature of the medium being conveyed ranges from 0°C to 80°C, and the maximum allowable inlet pressure is 0.6 MPa.

Hotline:

+86 0731-88632200

classification：

Middle-open pump

keyword：

Horizontal Single-Stage Fire Pump

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Product overview Product parameters Why choose us? Frequently Asked Questions

Product Overview

　　The SAP-type single-stage, double-suction, horizontal split-case pump is... Middle-open pump The manufacturer, Zhonglian Pump Industry, has developed a new double-suction, mid-open centrifugal pump based on the SA-type double-suction, mid-open pump through structural optimization and design improvements. This pump is designed for conveying clear water free of solid particles, as well as other liquids whose physical and chemical properties are similar to those of water. The temperature of the medium being conveyed ranges from 0°C to 80°C, and the maximum allowable inlet pressure is 0.6 MPa.

SAP-Type Single-Stage Double-Suction Horizontally Split Centrifugal Pump Model Description

Model: 300SAP—90

300—suction port diameter is 250mm

90 - Head height

Structural Diagram of SAP-Type Single-Stage Double-Suction Horizontal Split-Casing Centrifugal Pump

　　The SAP-type horizontal double-suction split-case pump is installed horizontally. The pump casing is horizontally split along the axis centerline, with the upper part serving as the pump cover and the lower part as the pump body. Both the suction port and the discharge port are located on the pump body below the pump shaft centerline, and their centerlines are perpendicular to the shaft axis. During maintenance, there is no need to disconnect the inlet or outlet pipelines—simply lift off the pump cover to remove the rotor assembly. Except for the 48SAP-30 model, which uses sliding bearings, all other models employ rolling bearings. The bearing end covers are sealed using skeleton oil seals. The shaft seals utilize both soft packing seals and mechanical seals.

　　Rotational direction of the horizontal split-case pump: When viewed from the motor end toward the pump, the rotation is counterclockwise—meaning the suction port is on the left and the discharge port is on the right. Alternatively, upon user request, the drive end can be moved to the other end of the pump; in this case, both the rotational direction and the directions of the suction and discharge ports will be reversed compared to the above description.

　　Material of main components for horizontal split-case pumps: All flow-path components of the pump are made of cast iron. If required by the user, the impeller can also be manufactured from cast steel or brass, but this must be specified in the purchase contract.

Installation Diagram of SAP-Type Single-Stage Double-Suction Horizontally Split-Casing Centrifugal Pump

Assembly and Disassembly of SAP-Type Single-Stage Double-Suction Horizontally Split-Casing Centrifugal Pumps

1. Assemble the rotor components: For a packing pump, sequentially install the impeller, shaft sleeve, shaft sleeve nut, packing rings, and packing.

Install the stuffing box gland, water stop ring, and bearing components, then put on the double-suction sealing ring and mount the coupling. For mechanical seal pumps, install the impeller, shaft sleeve, mechanical seal retaining sleeve, moving ring of the mechanical seal, stationary ring of the mechanical seal, mechanical seal gland, and bearing components in sequence. Next, put on the double-suction sealing ring and mount the coupling.

2. Check the radial runout of the outer circumference of the sealing components on the impeller and the outer circumference of the shaft sleeve on the rotor assembly, ensuring that it does not exceed the values specified in the table below (in millimeters).

Nominal diameter	<50	50-120	125-250	250-500	500-800	800-1250
Bounce amount	0.03	0.04	0.05	0.06	0.08	0.1

3. Install the rotor assembly and studs onto the pump body, then secure the bearing housing cover. Use the shaft sleeve nut to adjust the axial position of the impeller.

Position it midway between the pump body’s flow passage and secure it in place. Then, tighten the bearing housing cover using the set screws.

4. Place the center-opening paper gasket, put on the pump cover, tighten the screw tail pin, and then securely tighten the pump cover nut. For packing pumps,

Do not pack the packing too tightly—excessive packing tightness can cause the sleeve to heat up and increase energy consumption. Likewise, do not pack it too loosely; if the packing is too loose, liquid leakage will increase significantly and pump efficiency will decline.

After assembly, manually rotate the pump shaft—there should be no rubbing or scraping, and the rotation should be smooth and even. To disassemble, simply reverse the above-mentioned assembly sequence.

Installation Precautions for SAP-Type Single-Stage Double-Suction Horizontally Split-Casing Centrifugal Pumps

1. Check that the pump and motor are free of damage.

2. The installation height of the pump, plus the hydraulic losses in the suction piping and its velocity head, must not exceed the allowable suction vacuum height specified in the pump’s data sheet. The foundation dimensions shall conform to the installation dimensions of the pump unit.

3. Installation Sequence

Place the pump and motor onto the anchor bolts, put on the nuts, and position them on the concrete foundation with the reserved anchor bolt holes.

Use adjusting wedge shims to correct the level and ensure proper alignment of the pump and motor shafts. Then, fill all anchor bolt holes completely with concrete.

(2) After the concrete has fully hardened, recheck the coaxiality of the pump and motor shafts by aligning them along the outer circumference of the two couplings; the allowable deviation should not exceed 0.1 mm. The tolerance for unevenness in the end clearance around the circumference is 0.3 mm. After tightening the base mounting bolts, verify the alignment accuracy, then completely fill the space beneath the motor and pump feet with concrete, ensuring that sufficient clearance is left around the wedge blocks.

(3) After verifying that the motor’s rotation direction matches the pump’s rotation direction, install the coupling’s connecting pin.

4. The inlet and outlet pipelines should be supported by separate brackets and must not rely on the pump body for support.

5. The joint between the pump and the piping system must ensure good air tightness. In particular, the inlet and outlet pipelines must be strictly leak-proof, and there should be no possibility of air pockets forming within the installation.

6. If the pump is installed above the inlet water level, a foot valve should be installed for priming purposes, or a vacuum-assisted water intake method can also be used.

The installation methods and requirements for pump units without a common base outlined above apply equally to the installation of pump units equipped with a common base.

Follow the method described above.

7. Between the pump and the discharge pipeline, a gate valve and a check valve are generally required (not necessary for head heights less than 20 meters). The check valve should be installed behind the gate valve.

Starting, stopping, and operating the SAP-type single-stage, double-suction, horizontal split-case centrifugal pump

1. Starting and Stopping:

Before starting: The pump rotor should turn smoothly and evenly when rotated.

(2) Close the outlet gate valve and fill the pump with water (if there is no foot valve, use a vacuum pump to draw water in). Ensure that the pump is completely filled with water and free of any air pockets.

(3) If the pump is equipped with a vacuum gauge or a pressure gauge, first close the stopcock connected to the pump before starting the motor. Once the pump reaches normal operating speed, open the stopcock and then gradually open the outlet gate valve. If the flow rate is too high, slightly close the gate valve to adjust it; conversely, if the flow rate is too low, open the gate valve further.

(4) Tighten the compression nuts on the packing gland evenly until liquid starts to leak out in drops, while paying close attention to any temperature rise at the packing chamber.

(5) When stopping the pump, first close the stopcocks on the vacuum gauge and pressure gauge, as well as the gate valve on the discharge pipeline. Then, turn off the power supply to the motor. If the ambient temperature is low, open the square screw plug at the bottom of the pump body to drain any remaining water, thus preventing the pump from freezing and cracking.

(6) When the pump is to be discontinued for an extended period, disassemble it, wipe all parts dry, apply rust-preventive oil to the machined surfaces, and store it properly.

2. Operation:

(1) The maximum temperature of the pump bearing should not exceed 75°C.

(2) The amount of calcium-based grease used for lubricating bearings should ideally occupy between one-third and one-half of the bearing housing space, and it should be replaced regularly.

(3) When the packing wears out, you can slightly tighten the packing gland. If the wear is excessive, the packing should be replaced. Mechanical seals generally do not wear out and have a service life of up to one year.

(4) Regularly inspect the components of the flexible coupling and pay attention to the temperature rise of the motor bearings.

(5) During operation, if you detect any noise or other abnormal sounds, immediately stop the machine, identify the cause, and eliminate it.

(6) The pump’s rotational speed must not be arbitrarily increased, but it can be operated at a lower speed.

Product Parameters

Parameter Range for SAP-Type Single-Stage Double-Suction Horizontally Split-Casing Centrifugal Pumps

Flow rate Q: 72–20,000 m³/h

Head H: 6.8–186 m

Specific Parameter Table for SAP-Type Single-Stage Double-Suction Horizontally Split Centrifugal Pump

Model	Traffic	Head height	Efficiency	Shaft power	Rotational speed	Motor power
Model	(m³/h)	(m)	(%)	(kw)	(rpm)	(kw)
6SAP-6	180	97	80	59.47	2980	75
6SAP-6A	170	84.5	78	50.19	2980	75
6SAP-6J	90	22.5	74	7.46	1480	11
6SAP-8	160	54	81	29.07	2980	37
6SAP-8A	144	44	80	21.58	2980	30
6SAP-8B	133	36	77	16.94	2980	22
8SAP-7	280	95	80	90.61	2980	132
8SAP-7A	262	83	77	76.96	2980	110
8SAP-7B	247	73	76	64.65	2980	75
8SAP-10	280	63	81	59.34	2980	75
8SAP-10A	259	52	79	46.46	2980	55
8SAP-10B	239	44	78	36.74	2980	45
10SAP-6	540	94	78	177.33	1480	250
10SAP-6A	540	84	80	154.51	1480	220
10SAP-6B	540	74	79	137.84	1480	185
10SAP-6J	500	39	81	65.6	980	90
10SAP-6JA	400	36	79	49.67	980	75
10SAP-6JB	400	32	79	44.15	980	55
10SAP-6F	500	65.6	79	113.14	1480	160
12SAP-4	540	140	76	271.07	1480	355
12SAP-10	790	54	88	132.1	1480	160
14SAP-4	1000	180	80	613.12	1480	710
14SAP-10	1080	68	87	230.03	1480	280
14SAP-10A	1080	58	87	196.2	1480	250
14SAP-10B	1080	48	87	162.37	1480	220
14SAP-10J	800	28	87	70.16	980	90
14SAP-10JA	720	25	87	56.38	980	75
14SAP-10JB	720	21	87	47.36	980	75
14SAP-10F	547	14.5	86	25.13	742	37
14SAP-20	1320	26	85	110.03	1480	132
16SAP-9J	1080	40	84	140.14	980	185
16SAP-9JA	1080	35	84	122.62	980	160
16SAP-9JB	900	32	83	94.55	980	132
16SAP-10	1400	86	88.8	369.47	1480	500
16SAP-13	1500	50	87.3	234.11	1480	280
20SAP-4	2000	165	80.9	1111.56	980	1600
20SAP-5	2000	127.5	78.14	889.27	980	1120
20SAP-6	2160	100	84	700.71	980	800
20SAP-10	2160	60	88	401.32	980	500
20SAP-14	2160	32	88	214.04	980	280
20SAP-20	1800	37	82	221.32	1480	250
20SAP-22	1980	21	85	133.3	980	160
20SAP-22A	1800	16	85	92.33	980	110
20SAP-22J	1450	14	85	65.08	742	75
20SAP-22JA	1300	9.5	85	39.59	742	55
20SAP-28	2160	13	87	87.95	980	110
24SAP-6	3240	100	88	1003.3	980	1250
24SAP-10	3420	71	89.5	739.31	980	900
24SAP-10B	3084	57.8	89	545.78	980	630
24SAP-10J	2700	39	89	322.41	742	400
24SAP-14	3200	50	85	512.94	980	630
24SAP-18	3240	32	89	317.45	980	400
24SAP-18A	3000	23	89	211.26	980	250
24SAP-18J	2600	17.5	89	139.31	742	160
24SAP-18JA	2000	13.5	85	86.56	742	110
24SAP-18D	3140	16	85	161.06	742	200
24SAP-18F	3000	26.5	82.7	261.96	980	315
24SAP-28	3204	21	88	208.35	980	250
26SAP-10	4035	130	86.2	1658.24	1480	2000
28SAP-9J	3600	52	89.6	569.33	742	630
28SAP-12	5300	74	88.6	1206.26	980	1400
28SAP-25	5025	20	87	314.78	742	400
32SAP-9	6340	79	88	1550.96	742	1800
32SAP-10	8280	67.5	88.5	1720.91	742	2240
32SAP-10A	7920	62.5	88.5	1524.15	742	1800
32SAP-10B	7200	53.5	86.5	1213.49	742	1600
32SAP-10J	6480	44.2	88.5	881.9	590	1120
32SAP-10JA	6300	40.5	88.5	785.63	590	1000
32SAP-10JB	5400	28.5	88.5	473.87	495	560
32SAP-12	5400	63	91	1018.73	980	1120
32SAP-12J	3780	37.5	92	419.86	742	500
32SAP-13	5400	53	90.4	862.72	742	1000
32SAP-19	5400	29	90	474.15	742	560
32SAP-19A	5000	26	90	393.61	742	500
32SAP-19B	4700	20	90	284.61	742	355
32SAP-19J	4320	18.6	90	243.29	590	280
32SAP-19JA	4000	16.5	90	199.83	590	250
32SAP-19JB	3800	13	89	151.25	590	200
32SAP-19E	5278	33.8	89	546.21	742	630
32SAP-19F	4680	23.2	89	332.44	742	400
32SAP-25	5400	22.3	89.3	367.46	742	400
36SAP-13	8000	36	88	891.82	495	1120
36SAP-28	9180	27.5	88	781.73	742	900
40SAP-11	8600	45	86.4	1220.57	495	1600
44SAP-14	10800	41	91	1325.97	495	1600
44SAP-25	11700	26.1	88.9	936.03	495	1120
48SAP-30	19000	18.4	88.7	1074.02	1250	1250

Friendly reminder: Click on the specific model series above to view more detailed specifications and performance curves, among other information.

Why choose us?

Changsha Zhonghlian Pump Industry Co., Ltd. was founded in 1989 and was independently established after the restructuring of Changsha Water Pump Factory. It is a comprehensive national high-tech enterprise integrating design, research and development, manufacturing, and service. The company was listed on the Hunan Provincial Equity Exchange on December 31, 2019, with the abbreviation "Zhonghlian Pump Industry" and the equity code: 600275HN. It is currently a key backbone enterprise in China's centrifugal pump industry and one of the major professional manufacturers of multi-stage pumps in the country. The headquarters is located in Changsha City, Hunan Province, a historical and cultural city in China.

41000 m²

Square meters of land area

100 %

100% factory pass rate

41000 m²

Square meters of land area

100 %

100% factory pass rate

What is your typical delivery time?

Models in stock can be shipped the next day at the latest. All others are custom-made, with lead times generally ranging from 7 to 90 days depending on the product size and project specifics. Please contact our sales manager for details: 0731-88632200 。

Do you have centrifugal pumps in stock?

Centrifugal pumps come in numerous models and configurations. Except for a small number of high-volume, standard models that are in stock, the vast majority are not stocked and are customized products. We need to select a pump based on your site's flow rate, head, media temperature, pH value, and installation conditions, etc., to determine the pump model and configuration before we can submit an order to the factory for production.

What information should I provide when requesting a quote?

Generally, to obtain an accurate quotation, we recommend providing us with the following information: pump flow rate, head, on-site operating voltage and frequency, temperature, pH value, and solid particle content of the fluid being conveyed, and on-site installation conditions (horizontal or vertical installation), etc.

If you are not sure, don't worry, our business managers will assist you in determining this.

What products do you mainly produce?

Zhonglian Pump Industry manufactures various large industrial centrifugal pumps. Main products include: self-balancing multi-stage pumps, multi-stage centrifugal pumps, single-stage centrifugal pumps, split-case pumps, chemical pumps, submersible pumps, pipeline pumps, long-shaft pumps, condensate pumps, etc.

Could you help me with the selection?

Certainly! If the water pump model is not selected accurately, there will be big problems. If you choose a smaller one, it won't meet your needs; if you choose a larger one, it will waste electricity and fuel, increasing your costs.

Why is it so slow to get a price quote?

Because centrifugal pumps are non-standard customized products with many models, the price range is also very large. Even for the same model, the price difference is also very large due to different materials and configurations. Taking the most common water pump accessory—the impeller—as an example, the price of a stainless steel impeller is several times that of a cast iron impeller. Therefore, we need to clarify the relevant information to give you an accurate price. Normally, if you provide relatively comprehensive information, we can quote within 5 minutes.

XS-type single-stage double-suction split-case pump

SM-type horizontal single-stage wear-resistant double-suction split-case pump

XS-type single-stage double-suction split-case pump

SM-type horizontal single-stage wear-resistant double-suction split-case pump

+86 0731-88632200

Export Trade/Technical Support:

+86 153-4831-2290

Head Office Email:

zoomlian@yeah.net

No. 210, Huanbao Zhong Road, Yuhua District, Changsha City, Hunan Province, Leowoju Wisdom Valley Building B, 8th Floor

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