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

Free training for operation and maintenance personnel/free installation guidance/free provision of installation drawings

Self-balancing multistage pump

Multistage pump

Coal Mine Safety Certified Multi-stage Pump

Vertical multistage pump

Integrated pump station

Vacuum pump

Fire pump

Constant-pressure water supply equipment

Other pumps

Genuine accessories

AY-type horizontal centrifugal oil pump

Traffic: 2–600 m³/h

Head: 30-330m

Power: 2-710kw

Efficiency: 20%-82%

Pump weight: 138-2200kg

Cavitation margin: 1.9-7.3m

Price: 11,500–15,500

The AY-type single-stage and two-stage centrifugal oil pump series has been redesigned and modified on the basis of the earlier Y-type centrifugal oil pump series. It is a new product developed to meet the needs of modern construction and to quickly adapt to equipment upgrades and replacements centered on energy conservation.

Hotline:

+86 0731-88632200

classification：

Oil pump

keyword：

Horizontal Single-Stage Fire Pump

Product consultation

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Product overview Product parameters Why choose us? Frequently Asked Questions

Product Overview

　　AY-type heat Oil pump This series is an upgraded and redesigned version based on the original Y-type centrifugal oil pump series. It is a new product developed to meet the needs of modern construction and to quickly adapt to equipment upgrades and replacements centered on energy conservation. It can be used in petroleum refining, petrochemicals, chemical industries, and other applications involving the conveyance of media such as petroleum, liquefied petroleum gas, and other high-temperature, high-pressure liquids that are non-corrosive and free of solid particles, as well as flammable, explosive, or toxic substances.

Model Description for AY Horizontal Stainless Steel Centrifugal Oil Pumps

　　Model Description: 50AY60×2A

　　50——The pump’s suction port diameter is 50 mm.

　　AY——Modified Horizontal Centrifugal Oil Pump

　　60——The design point of the pump has a single-stage head of 60 m.

　　2——The pump has 2 stages.

　　A—Impeller outer diameter cutting code

Structural Features of AY-Type Horizontal Stainless Steel Centrifugal Oil Pumps

Structural Diagram of AY-Type Stainless Steel Oil Pump

Installation Dimension Drawing for AY Type Centrifugal Oil Pump

　　The AY-type hot oil pump is available in six structural types: single-stage, single-suction cantilever type; two-stage, single-suction cantilever type; single-stage, double-suction cantilever type; single-stage, double-suction, two-bearing type; two-stage, double-suction, two-bearing type; and two-stage, single-suction, two-bearing type.

　　The AY-type stainless steel oil pump’s pump casing features a radial split design and is mounted with horizontal centerline support. The suction and discharge flanges of the hot-oil pump are oriented vertically upward. The shaft seal can accommodate both soft packing and mechanical seals, which are interchangeable. The bearing housing is equipped with a set of radial ball bearings and a pair of thrust ball bearings arranged back-to-back. The bearings are lubricated with thin oil. For ease of maintenance, there is no need to disassemble the suction or discharge pipelines. By using an elastic pin-type extended coupling (or alternatively, an elastic diaphragm coupling), the impeller, bearings, shaft seal, and other components can be easily removed.

　　1. All bearing housing components are equipped with advanced sliding bearings and axial thrust bearings. The original 35, 50, and 60 bearing housings have been replaced with 45, 55, and 70 bearing housings, respectively, thereby enhancing reliability.

　　2. The hydraulic components of the flow passage adopt a highly efficient and energy-saving pump hydraulic model, with an average efficiency 5–8% higher than that of the older Y-type oil pumps.

　　3. To ensure continuity, the structural design, installation dimensions, and performance parameter ranges of the AY-type oil pump remain identical to those of the Y-type oil pump, facilitating the upgrade and retrofitting of existing equipment.

　　4. The components have a high degree of standardization, and common parts are shared among several product series.

　　5. The materials are carefully selected, with Type II and Type III materials forming the main components. Parts such as the bearing housing are now available in both cast steel and cast iron, providing favorable conditions for use in cold regions, areas exposed to frost, outdoor environments, and marine applications.

　　6. Bearings come in three cooling types: air cooling, fan cooling, and water cooling, and the appropriate type should be selected based on the pump’s operating temperature. Among these, fan cooling is particularly well-suited for regions with water shortages or poor water quality.

Assembly and Disassembly of the AY Horizontal Stainless Steel Centrifugal Oil Pump

　　I. Disassembly

　　1. Cantilever-type disassembly sequence:

　　(1) When disassembling, first close the gate valves in the pipeline, remove the cooling lines from the pump, and then dismantle the intermediate coupling and the pump coupling.

　　(2) Unscrew the nuts on the bolts connecting the pump cover to the pump body and the bracket to the bracket support. Then, lift the rotor assembly, along with the pump cover and bracket components, horizontally out of the pump body.

　　(3) Unscrew the impeller nut, then remove the impeller and take out the key (for two-stage cantilever-type pumps, also remove the stage spacer at the same time).

　　(4) Unscrew the nuts on the connecting bolts at the pump cover, bracket, and sealing gland, remove the pump cover, and then disassemble the sealing components one by one.

　　(5) Remove the front and rear covers of the bearings on both sides at the bracket, thereby separating the pump shaft from the bracket assembly. Then, disassemble the bearings from within the bracket.

　　2. Disassembly sequence for two-end supported structures:

　　(1) When disassembling, first close the gate valves in the pipeline, remove the cooling lines from the pump, dismantle the intermediate coupling and the pump coupling, and then extract the key.

　　(2) Unscrew the nut at the bearing end cover and the screws of the dust shield.

　　(3) Loosen the nuts of the connecting bolts between the bearing housing and the balance chamber cover, then remove the bearing housing from the pump shaft.

　　(4) Loosen the round nut on the bearing, and sequentially remove the retaining sleeve, rolling bearing, bearing end cover, thrust adjustment sleeve, and dust shield.

　　(5) Remove the bearing component at the other end using the same method.

　　(6) Unscrew the round nut at the sealing area and remove the seal.

　　(7) Unscrew the connecting nut between the pump body and the pump cover, then remove the pump cover horizontally.

　　(8) Remove the shaft sleeve, stop sleeve, and second-stage impeller.

　　(9) Remove the bolts connecting the stop plate and the partition, then take off the stop plate and the partition.

　　(10) Remove the pump shaft and the first-stage impeller horizontally, then disassemble the first-stage impeller.

　　II. Assembly:

　　Proceed in the reverse order of the disassembly sequence mentioned above.

　　III. Assembly and Adjustment of the Packing

　　1. Each end of the stuffing box is designed with five packing rings, two arranged on the inner side of the packing ring and three arranged on the outer side.

　　2. The cuts of each packing material should be neatly aligned and butt-jointed, and the joints of adjacent packing layers should be staggered by at least 90°.

　　3. The bolts of the packing gland should be tightened alternately and evenly, but the packing should not be compressed too tightly. The packing seal must allow for a slight leakage—ideally, the leaking water should drip in drops.

Installation of the AY-type horizontal stainless steel centrifugal oil pump

　　I. Installation

　　1. The quality of pump installation significantly affects the pump’s smooth operation and service life; therefore, installation and alignment work must be carried out carefully and never rushed.

　　2. The installation height, length, and diameter of the pump suction pipe shall meet the calculated values. The piping should be kept as short as possible to minimize unnecessary losses (such as bends), and it must be ensured that, during operation, the pump’s net positive suction head available does not exceed its allowable cavitation margin.

　　3. The suction and discharge pipelines should be supported by brackets. The pump must not bear any load from the pipelines.

　　4. The location for installing the pump should be spacious enough to facilitate maintenance and inspection work.

　　5. Installation sequence:

　　(1) Place the unit on a foundation with anchor bolts embedded in it, and use paired wedge shims between the base and the foundation for alignment purposes.

　　(2) Loosen the coupling, place a level on both the pump shaft and the base, and adjust the wedge shims to ensure that the unit is properly leveled. Then, tighten the anchor bolts appropriately to prevent any movement.

　　(3) Pour concrete into the base and anchor bolt holes.

　　(4) After the concrete has fully set, check whether the base and anchor bolts have shifted. If you deem it acceptable, tighten the anchor bolts and recheck the pump shaft’s levelness.

　　(5) Correct the concentricity of the pump shaft and the motor shaft. On the outer circumference of the coupling, the allowable deviation is 0.1 mm. The gap between the two coupling faces should be maintained at 2–4 mm (use the smaller value for small pumps). The gap must be uniform, with a tolerance of 0.3 mm.

　　(6) After connecting the pipelines and confirming the rotation direction of the prime mover, install the coupling and recheck the shaft’s concentricity.

　　(7) After the unit has undergone actual trial operation for 2 to 3 hours, perform a final inspection. If no adverse phenomena are observed, the installation shall be considered qualified. During the trial operation, monitor the temperature and vibration of the bearings as follows:

　　Vibration intensity limit allowed by temperature standards

　　Bearing

　　Type: Sliding Bearing

　　(Babbitt alloy) rolling

　　Bearing rotational speed n, maximum vibration intensity limit mm/s

　　Shaft centerline height

　　≤225mm >225mm

　　Temperature <60°C <65° 3000 r/min 4.5 7.1

　　Schematic diagram of an extended coupling: Maximum allowable deviation: X = 0.2 mm, a = 40

　　6. During installation, all openings on the unit must be covered to prevent foreign objects from falling into the machine.

　　7. To prevent debris from entering the pump through the pipeline, a filter should be installed upstream of the pump for newly installed pipelines; the effective cross-sectional area of the filter should be 2 to 3 times larger than that of the suction pipe.

Starting and Stopping of AY-Type Horizontal Stainless Steel Centrifugal Oil Pumps

　　1. Driving Preparation

　　(1) Before driving, remove any debris placed on the machine and clean up the site thoroughly.

　　(2) Inject an appropriate amount of lubricant.

　　(3) Before connecting the coupling, check the rotation direction of the prime mover to ensure it matches the pump’s rotation direction. After verifying this, connect the coupling properly.

　　(4) Before installing the coupling, manually rotate the pump shaft to ensure it turns smoothly.

　　(5) Before starting the pump, it should be filled with the liquid being conveyed to expel any air remaining in the pump. At this time, the gate valve on the discharge pipe should be closed.

　　(6) When conveying hot oil, the pump must be uniformly preheated before starting up. The preheating process is achieved by continuously passing the hot oil being conveyed through the pump body. The pump casing temperature must not fall below 40°C below the inlet temperature. The preheating rate should be 50°C per hour.

　　(7) Before starting the vehicle, check whether the foundation bolts are loose and verify the supply status of lubricating oil, sealing oil, and cooling water.

　　2. Drive a car

　　(1) Thoroughly check whether all preparatory work has been completed.

　　(2) Turn on the switches of all instruments and close the pressure gauge cock.

　　(3) Connect the power supply or start the steam turbine. Once the pump reaches its normal speed and the instrument indicates the corresponding pressure, gradually open the gate valve on the discharge pipeline and adjust it to the desired operating conditions. Under the condition that the discharge pipeline is closed, the pump must not run continuously for more than 3 minutes.

　　(4) During operation, pay close attention to the power reading of the prime mover and the vibration condition of the pump. The vibration amplitude should not exceed 0.06 millimeters.

　　3. Maintenance:

　　(1) During the economic inspection, check the bearing’s heating condition. The bearing temperature should not exceed the values specified in the temperature standard table, and the oil level should be monitored at all times. Regularly replace the lubricating oil.

　　(2) Do not use the suction valve to regulate flow, as this may cause cavitation.

　　(3) The pump should not be operated continuously at a flow rate lower than 30% of its design flow rate. If continuous operation under such conditions is unavoidable, a bypass pipe should be installed at the pump outlet to divert the excess flow back into the pump’s inlet pipeline.

　　(4) Regularly pay attention to any leaks and overheating in the seals.

　　(5) Regularly check for loosening of the anchor bolts, whether the pump body temperature matches the inlet temperature, the fluctuations of the outlet pressure gauge, and the vibration condition of the pump.

　　(6) Pay attention to whether there are any unusual noises during pump operation. If you detect any abnormal conditions, promptly notify the relevant personnel for handling.

　　4. Parking:

　　(1) Gradually close the gate valve on the discharge pipeline.

　　(2) Cut off the power supply (or stop the steam turbine).

　　(3) After the pump has cooled down, close the pipelines for each cooling system and the seal oil system.

　　(4) Drain the liquid and cooling water from the pump and clean it thoroughly. This prevents freezing and clogging.

Product Parameters

Parameter Range of AY-Type Horizontal Stainless Steel Centrifugal Oil Pumps

Flow rate Q: 2–600 m³/h

Head H: 30–330 m

Temperature T: -20℃ to +300℃

Performance Parameter Table for AY Type Horizontal Stainless Steel Centrifugal Oil Pumps

Model	Traffic	Head height	Efficiency	Shaft power	Rotational speed	Impeller outer diameter	Weight	Motor power	Motor model
Model	(m³/h)	(m)	(%)	(kw)	(rpm)	(mm)	(kg)	(kW)	Motor model
40AY40×2	6.25	80	31	4.4	2950	180	163	7.5	YB132S2-2
40AY40×2A	5.85	70	31	3.6	2950	180	163	5.5	YB132S1-2
40AY40×2B	5.4	60	31	2.85	2950	180	163	4	YB112M-2
40AY40×2C	4.9	50	31	2.15	2950	180	163	3	YB100L-2
50AY60	12.5	70	42	5.68	2950	235	130	7.5	YB132S2-2
50AY60A	11.2	53	39	4.15	2950	235	130	5.5	YB132S1-2
50AY60B	9.9	39	37	2.84	2950	235	130	4	YB112M-2
50AY60×2	12.5	120	37	11.05	2950	235	210	15	YB160M2-2
50AY60×2A	12	105	36	9.54	2950	235	210	15	YB160M2-2
50AY60×2B	11	90	35	7.71	2950	235	210	11	YB160M1-2
50AY60×2C	10	76	35	5.92	2950	235	210	11	YB160M1-2
65AY60	25	60	56	7.3	2950	210	170	11	YB160M1-2
65AY60A	22.5	49	54	5.56	2950	210	170	7.5	YB132S2-2
65AY60B	20	37.5	52	3.93	2950	210	170	5.5	YB132S1-2
65AY100	25	110	47	15.94	2950	275	190	22	YB180M-2
65AY100A	23	92	46	12.54	2950	275	190	18.5	YB160L-2
65AY100B	21	73	44	9.49	2950	275	190	15	YB160M2-2
65AY100×2	25	205	48	29.1	2950	275	310	45	YB225M-2
65AY100×2A	23	178	47	23.74	2950	275	310	37	YB200L2-2
65AY100×2B	22	154	46	20.07	2950	275	310	30	YB200L1-2
65AY100×2C	20	130	45	15.74	2950	275	310	22	YB180M-2
80AY60	50	60	62	13.19	2950	210	200	18.5	YB160L-2
80AY60A	45	49	61	9.85	2950	210	200	15	YB160M2-2
80AY60B	40	38	60	6.9	2950	210	200	11	YB160M1-2
80AY100	50	105	59	24.25	2950	275	220	37	YB200L2-2
80AY100A	45	85	56	18.61	2950	275	220	30	YB200L1-2
80AY100B	40	76	54	15.34	2950	275	220	22	YB180M-2
80AY100×2	50	200	57	47.81	2950	275	380	75	YB280S-2
80AY100×2A	47	175	55	40.75	2950	275	380	55	YB250M-2
80AY100×2B	43	153	53	33.83	2950	275	380	45	YB225M-2
80AY100×2C	40	125	51	26.72	2950	275	380	37	YB200L2-2
100AY60	100	63	72	23.84	2950	215	220	37	YB200L2-2
100AY60A	90	49	71	16.93	2950	215	220	30	YB200L1-2
100AY60B	79	38	67	12.21	2950	215	220	18.5	YB160L-2
100AY120	100	123	66	50.78	2950	285	320	75	YB280S-2
100AY120A	93	108	62	44.14	2950	285	320	75	YB280S-2
100AY120B	86	94	62	35.53	2950	285	320	55	YB250M-2
100AY120C	79	75	59	27.37	2950	285	320	37	YB200L2-2
100AYS120×2	100	240	61	107.21	2950	275	500	160	YB315L1-2
100AYS120×2A	93	205	60	86.59	2950	275	500	132	YB315M-2
100AYS120×2B	86	178	59	70.7	2950	275	500	110	YB315S-2
100AYS120×2C	79	150	58	55.67	2950	275	500	75	YB280S-2
150AY75	180	80	75	52.32	2950	250	290	75	YB280S-2
150AY75A	160	66	74	38.89	2950	250	290	55	YB250M-2
150AY75B	145	46	73	24.9	2950	250	290	37	YB200L2-2
150AY150	180	157	69	111.61	2950	315	600	160	YB315L1-2
150AY150A	168	137	68	92.23	2950	315	600	132	YB315M-2
150AY150B	155	116	67	73.13	2950	315	600	110	YB315S-2
150AY150C	140	94	65	55.17	2950	315	600	75	YB280S-2
150AY150×2	180	300	67	219.63	2950	315	1500	315	YB355L-2
150AY150×2A	167	258	65	180.63	2950	315	1500	250	YB355S4-2
150AY150×2B	155	222	62	151.24	2950	315	1500	220	YB355S3-2
150AY150×2C	140	181	60	115.09	2950	315	1500	160	YB315L1-2
200AY75	300	75	79	77.61	2950	245	275	110	YB315S-2
200AY75A	275	67	75	66.94	2950	245	275	90	YB280M-2
200AY75B	248	57	72	53.5	2950	245	275	75	YB280S-2
200AY150	300	150	76	161.35	2950	315	620	220	YB355S3-2
200AY150A	270	137	75	134.4	2950	315	620	185	YB355S1-2
200AY150B	243	127	73	115.2	2950	315	620	160	YB315L1-2
200AY150C	219	112	72	92.83	2950	315	620	132	YB315M-2
200AY150×2	300	300	74	331.42	2950	315	1400	450	YB450M1-2
200AY150×2A	287	270	73	289.26	2950	315	1400	400	YB450S3-2
200AY150×2B	270	239	72	244.23	2950	315	1400	355	YB450S2-2
200AY150×2C	247	195	70	187.5	2950	315	1400	250	YB355S4-2
250AYS80	500	80	82	132.93	2950	250	450	185	YB355S1-2
250AYS80A	440	62	81	91.78	2950	250	450	132	YB315M-2
250AYS80B	370	44	80	55.45	2950	250	450	90	YB280M-2
250AYS150×2	500	303	79	522.58	2950	315	2500	630	YB560M1-2
250AYS150×2A	472	272	79	442.84	2950	315	2500	560	YB560S2-2
250AYS150×2B	444	230	78	356.77	2950	315	2500	400	YB450S2-2
250AYS150×2C	400	190	77	268.96	2950	315	2500	315	YB450S1-2
250AYS150	500	153	79	263.88	2950	315	1500	315	YB450S1-2
250AYS150A	472	136	78	224.26	2950	315	1500	280	YB355M-2
250AYS150B	444	119	77	186.98	2950	315	1500	250	YB355S4-2
250AYS150C	400	96	76	137.68	2950	315	1500	185	YB355S1-2

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.

IY-type horizontal single-stage single-suction oil pump

DY-type Multistage Centrifugal Oil Pump (BB4)

IY-type horizontal single-stage single-suction oil pump

DY-type Multistage Centrifugal Oil Pump (BB4)

+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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