LG Series Vertical Multistage Pump – High-Rise Water Supply Type

Product Description

Series Type Designation

Product Overview and Applications

LG vertical easy-disassembly multistage clean water pump for high-rise building water supply is a new-generation water supply product developed according to the practical needs of constant-pressure water supply and fire-fighting systems in high-rise buildings. With advanced hydraulic models carefully designed by our technical engineers, this pump offers high efficiency, stable performance, low noise, long service life, attractive appearance, small footprint, easy maintenance and light weight.
LG vertical easy-disassembly multistage clean water pump for high-rise building water supply is directly coupled with the motor. The pump shaft and motor shaft are connected by a clamp-type coupling, ensuring perfect coaxiality between pump and motor for smooth operation and low noise.
The motor is a Y-series three-phase asynchronous motor, which is convenient for users to replace. The unit is rigidly connected as a whole, and no alignment is required during installation and use. The shaft seal adopts a mechanical seal, and the pump features an easy-disassembly structure for convenient replacement of the mechanical seal.
The rotation direction of the LG easy-disassembly multistage pump for high-rise building water supply is clockwise when viewed from the motor end.

The LG vertical easy-disassembly multistage clean water pump for high-rise building water supply is particularly suitable for constant-pressure water supply, fire-fighting and sprinkler water supply systems in residential buildings, hotels, office buildings and other high-rise buildings. It can also be used as a supporting pump for automatic make-up water of cooling towers in chemical processes, system pressure stabilization, process circulating water, long-distance water transfer and boiler feed water.
The pump is suitable for conveying clean water at normal temperature (<80℃) (hot-water type can handle media with temperature less than 105℃) or other non-corrosive liquids with physical and chemical properties similar to water at normal temperature.

Product Features

• 1. The LG vertical easy-disassembly multistage clean water pump for high-rise building water supply has a compact structure, small size and attractive appearance. Its structural design determines that it occupies a small installation footprint and, with an optional protective cover, can be installed outdoors.
• 2. The impeller is mounted directly on the motor shaft, ensuring excellent concentricity between pump and motor, which significantly improves operating stability and extends service life.
• 3. The shaft seal adopts a mechanical seal or a combination of mechanical seals, with high-quality hard alloy sealing rings to enhance wear resistance and effectively extend seal service life.
• 4. Installation and maintenance are convenient, with no need to dismantle the pipeline system. The pump inlet and outlet have the same diameter, simplifying pipeline connection.
• 5. Depending on the required flow and head, pumps can be used in series or parallel operation.
• 6. According to installation requirements, the suction and discharge ports can be arranged at 0°, 90°, 180° or 270° to suit different piping layouts.
• 7. The pump head can be adjusted by increasing or reducing the number of stages and by trimming the impeller outside diameter, without changing the installation footprint.

Operating Conditions

1. The medium used should be similar to water, with kinematic viscosity <150mm2/s, free from hard particles and non-corrosive in nature;
2. The installation site altitude should be <1000 m; if it exceeds this value, please indicate it when ordering so that we can provide a more reliable product;
3. Medium temperature: -15℃～120℃;
4. Maximum system working pressure ≤2.5 MPa;
5. Ambient temperature should be below 40℃, and relative humidity below 95%.

Structural Description

1. The LG vertical easy-disassembly multistage clean water pump for high-rise building water supply features a compact structure, small size, attractive appearance and small footprint, helping reduce building costs;
2. The suction and discharge ports of the LG vertical easy-disassembly multistage clean water pump for high-rise building water supply are arranged on the same centerline, simplifying pipeline connection;
3. According to actual installation conditions, the pump inlet and outlet can be arranged at 90°, 180° or 270° in different directions;
4. Depending on the actual requirements, the pump outlet can be equipped with 1 to 5 outlets, allowing different heads to be obtained from the same pump.

No.	Component Name	Material / Model	No.	Component Name	Material / Model
1	Motor	Y Series (V5), 2-Pole	9	Shaft Sleeve	Q235
2	Motor Bracket	HT200	10	Middle Section	HT200
3	Coupling	HT200	11	Diffuser	HT200
4	Mechanical Seal Cover	HT200	12	Impeller	HT200
5	Air Release Valve	Copper Alloy	13	Shaft	45 Steel / 2Cr13
6	Mechanical Seal	120A	14	Bearing	Tin Bronze
7	Final Diffuser	HT200	15	Suction Section	HT200
8	Discharge Section	HT200

Performance Parameters

Model	Stages	Flow	Head	Speed	Motor Power	Efficiency	Weight	Required NPSH
		(m3/h)	(M)	(r/min)	(kw)	(%)	Kg	（NPSH）r(m)
25LG(R)3-10*2	2	3	20	2900	0.75	42	70	2.0
25LG(R)3-10*3	3	3	30	2900	1.1	42	74	2.0
25LG(R)3-10*4	4	3	40	2900	1.5	42	85	2.0
25LG(R)3-10*5	5	3	50	2900	1.5	42	89	2.0
25LG(R)3-10*6	6	3	60	2900	2.2	42	100	2.0
25LG(R)3-10*7	7	3	70	2900	2.2	42	104	2.0
25LG(R)3-10*8	8	3	80	2900	2.2	42	108	2.0
25LG(R)3-10*9	9	3	90	2900	2.2	42	112	2.0
25LG(R)3-10*10	10	3	100	2900	3	42	125	2.0
25LG(R)3-10*11	11	3	110	2900	3	42	129	2.0
25LG(R)3-10*12	12	3	120	2900	4	42	145	2.0
25LG(R)3-10*13	13	3	130	2900	4	42	149	2.0
25LG(R)3-10*14	14	3	140	2900	4	42	153	2.0
25LG(R)3-10*15	15	3	150	2900	4	42	157	2.0
Model	Stages	Flow	Head	Speed	Motor Power	Efficiency	Weight	Required NPSH
		(m3/h)	(M)	(r/min)	(kw)	(%)	Kg	（NPSH）r(m)
32LG(R)6.5-15*2	2	6.5	30	2900	1.5	53	90	2.4
32LG(R)6.5-15*3	3	6.5	45	2900	2.2	53	100	2.4
32LG(R)6.5-15*4	4	6.5	60	2900	3	53	115	2.4
32LG(R)6.5-15*5	5	6.5	75	2900	4	53	135	2.4
32LG(R)6.5-15*6	6	6.5	90	2900	4	53	142	2.4
32LG(R)6.5-15*7	7	6.5	105	2900	5.5	53	175	2.4
32LG(R)6.5-15*8	8	6.5	120	2900	5.5	53	182	2.4
32LG(R)6.5-15*9	9	6.5	135	2900	5.5	53	190	2.4
32LG(R)6.5-15*10	10	6.5	150	2900	7.5	53	210	2.4
40LG(R)12-15*2	2	12	30	2900	2.2	60	90	2.9
40LG(R)12-15*3	3	12	45	2900	3	60	105	2.9
40LG(R)12-15*4	4	12	60	2900	4	60	130	2.9
40LG(R)12-15*5	5	12	75	2900	5.5	60	155	2.9
40LG(R)12-15*6	6	12	90	2900	5.5	60	163	2.9
40LG(R)12-15*7	7	12	105	2900	7.5	60	180	2.9
40LG(R)12-15*8	8	12	120	2900	7.5	60	190	2.9
40LG(R)12-15*9	9	12	135	2900	11	60	215	2.9
40LG(R)12-15*10	10	12	150	2900	11	60	225	2.9
Model	Stages	Flow	Head	Speed	Motor Power	Efficiency	Weight	Required NPSH
		(m3/h)	(M)	(r/min)	(kw)	(%)	Kg	（NPSH）r(m)
50LG(R)24-20*2	2	24	40	2900	5.5	69	160	3.2
50LG(R)24-20*3	3	24	60	2900	7.5	69	180	3.2
50LG(R)24-20*4	4	24	80	2900	11	69	250	3.2
50LG(R)24-20*5	5	24	100	2900	11	69	260	3.2
50LG(R)24-20*6	6	24	120	2900	15	69	280	3.2
50LG(R)24-20*7	7	24	140	2900	15	69	290	3.2
50LG(R)24-20*8	8	24	160	2900	18.5	69	315	3.2
65LG(R)36-20*2	2	36	40	2900	7.5	72	170	3.4
65LG(R)36-20*3	3	36	60	2900	11	72	230	3.4
65LG(R)36-20*4	4	36	80	2900	15	72	250	3.4
65LG(R)36-20*5	5	36	100	2900	18.5	72	280	3.4
65LG(R)36-20*6	6	36	120	2900	22	72	330	3.4
65LG(R)36-20*7	7	36	140	2900	22	72	345	3.4
65LG(R)36-20*8	8	36	160	2900	30	72	395	3.4
Model	Stages	Flow	Head	Speed	Motor Power	Efficiency	Weight	Required NPSH
		(m3/h)	(M)	(r/min)	(kw)	(%)	Kg	（NPSH）r(m)
80LG(R)50-20*2	2	50	40	2900	11	73	250	3.4
80LG(R)50-20*3	3	50	60	2900	15	73	280	3.4
80LG(R)50-20*4	4	50	80	2900	18.5	73	310	3.4
80LG(R)50-20*5	5	50	100	2900	22	73	360	3.4
80LG(R)50-20*6	6	50	120	2900	30	73	440	3.4
80LG(R)50-20*7	7	50	140	2900	30	73	460
80LG(R)50-20*8	8	50	160	2900	37	73	490
100LG72-20*2	2	72	40	2900	11	73	260	3.5
100LG72-20*3	3	72	60	2900	18.5	73	290	3.5
100LG72-20*4	4	72	80	2900	22.0	73	380	3.5
100LG72-20*5	5	72	100	2900	30.0	73	450	3.5
100LG72-20*6	6	72	120	2900	37.0	73	470	3.5
100LG72-20*7	7	72	140	2900	45.0	73	520	3.5
100LG72-20*8	8	72	160	2900	45.0	73	540	3.5
100LG72-20*9	9	72	180	2900	55.0	73		3.5
Model	Stages	Flow	Head	Speed	Motor Power	Efficiency	Weight	Required NPSH
		(m3/h)	(M)	(r/min)	(kw)	(%)	Kg	（NPSH）r(m)
100LG100-20*2	2	100	40	2900	18.5	76		3.7
100LG100-20*3	3	100	60	2900	30	76		3.7
100LG100-20*4	4	100	80	2900	37	76		3.7
100LG100-20*5	5	100	100	2900	45	76		3.7
100LG100-20*6	6	100	120	2900	55	76		3.7
100LG100-20*7	7	100	140	2900	75	76		3.7
100LG100-20*8	8	100	160	2900	75	76		3.7
150LG150-20*2	2	150	40	2900	30	77		4.1
150LG150-20*3	3	150	60	2900	37	77		4.1
150LG150-20*4	4	150	80	2900	45	77		4.1
150LG150-20*5	5	150	100	2900	55	77		4.1
150LG150-20*6	6	150	120	2900	75	77		4.1
150LG150-20*7	7	150	140	2900	90	77		4.1
150LG150-20*8	8	150	160	2900	90	77		4.1
150LG150-20*9	9	150	180	2900	110	77		4.1
150LG150-20*10	10	150	200	2900	132	77		4.1

Installation Dimensions

Model	Stages	L	H	H1	H2	B	b	n-φd	Inlet Flange				Outlet Flange
									Dj	Djn	Dj2	n-dj	Dc	Dcn	Dc2	n-φdc
25LG(R)3-10	2	130	630	85	180	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
25LG(R)3-10	3	130	670	85	220	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
25LG(R)3-10	4	130	710	85	260	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
25LG(R)3-10	5	130	755	85	305	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
25LG(R)3-10	6	130	825	85	340	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
25LG(R)3-10	7	130	865	85	380	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
25LG(R)3-10	8	130	900	85	425	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
25LG(R)3-10	9	130	945	85	460	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
25LG(R)3-10	10	130	1020	85	500	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
25LG(R)3-10	11	130	1060	85	540	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
25LG(R)3-10	12	130	1120	85	580	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
25LG(R)3-10	13	130	1160	85	620	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
25LG(R)3-10	14	130	1200	85	660	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
25LG(R)3-10	15	130	1240	85	700	230	190	4-φ18	115	25	85	4-M12	115	25	85	4-φ14
Model	Stages	L	H	H1	H2	B	b	n-φd	Inlet Flange				Outlet Flange
									Dj	Djn	Dj2	n-dj	Dc	Dcn	Dc2	n-φdc
32LG(R)6.5-15	2	145	665	63	179	260	220	4-φ18	140	32	100	4-M16	140	32	100	4-φ18
32LG(R)6.5-15	3	145	740	63	229	260	220	4-φ18	140	32	100	4-M16	140	32	100	4-φ18
32LG(R)6.5-15	4	145	825	63	279	260	220	4-φ18	140	32	100	4-M16	140	32	100	4-φ18
32LG(R)6.5-15	5	145	895	63	329	260	220	4-φ18	140	32	100	4-M16	140	32	100	4-φ18
32LG(R)6.5-15	6	145	945	63	379	260	220	4-φ18	140	32	100	4-M16	140	32	100	4-φ18
32LG(R)6.5-15	7	145	1070	63	429	260	220	4-φ18	140	32	100	4-M16	140	32	100	4-φ18
32LG(R)6.5-15	8	145	1120	63	479	260	220	4-φ18	140	32	100	4-M16	140	32	100	4-φ18
32LG(R)6.5-15	9	145	1170	63	529	260	220	4-φ18	140	32	100	4-M16	140	32	100	4-φ18
32LG(R)6.5-15	10	145	1220	63	579	260	220	4-φ18	140	32	100	4-M16	140	32	100	4-φ18
40LG(R)12-15	2	145	710	70	193	260	220	4-φ18	150	40	110	4-M16	150	40	110	4-φ18
40LG(R)12-15	3	145	800	70	251	260	220	4-φ18	150	40	110	4-M16	150	40	110	4-φ18
40LG(R)12-15	4	145	880	70	309	260	220	4-φ18	150	40	110	4-M16	150	40	110	4-φ18
40LG(R)12-15	5	145	1015	70	367	260	220	4-φ18	150	40	110	4-M16	150	40	110	4-φ18
40LG(R)12-15	6	145	1075	70	425	260	220	4-φ18	150	40	110	4-M16	150	40	110	4-φ18
40LG(R)12-15	7	145	1170	70	483	260	220	4-φ18	150	40	110	4-M16	150	40	110	4-φ18
40LG(R)12-15	8	145	1230	70	541	260	220	4-φ18	150	40	110	4-M16	150	40	110	4-φ18
40LG(R)12-15	9	145	1410	70	599	260	220	4-φ18	150	40	110	4-M16	150	40	110	4-φ18
40LG(R)12-15	10	145	1465	70	657	260	220	4-φ18	150	40	110	4-M16	150	40	110	4-φ18
Model	Stages	L	H	H1	H2	B	b	n-φd	Inlet Flange				Outlet Flange
									Dj	Djn	Dj2	n-dj	Dc	Dcn	Dc2	n-φdc
50LG(R)24-20	2	180	885	80	214	300	248	4-φ23	165	50	125	4-M16	165	50	125	4-φ18
50LG(R)24-20	3	180	985	80	273	300	248	4-φ23	165	50	125	4-M16	165	50	125	4-φ18
50LG(R)24-20	4	180	1145	80	332	300	248	4-φ23	165	50	125	4-M16	165	50	125	4-φ18
50LG(R)24-20	5	180	1210	80	391	300	248	4-φ23	165	50	125	4-M16	165	50	125	4-φ18
50LG(R)24-20	6	180	1275	80	450	300	248	4-φ23	165	50	125	4-M16	165	50	125	4-φ18
50LG(R)24-20	7	180	1340	80	509	300	248	4-φ23	165	50	125	4-M16	165	50	125	4-φ18
50LG(R)24-20	8	180	1450	80	568	300	248	4-φ23	165	50	125	4-M16	165	50	125	4-φ18
65LG(R)36-20	2	180	965	90	245	300	248	4-φ23	185	65	145	4-M16	185	65	145	4-φ18
65LG(R)36-20	3	180	1120	90	304	300	248	4-φ23	185	65	145	4-M16	185	65	145	4-φ18
65LG(R)36-20	4	180	1185	90	363	300	248	4-φ23	185	65	145	4-M16	185	65	145	4-φ18
65LG(R)36-20	5	180	1295	90	422	300	248	4-φ23	185	65	145	4-M16	185	65	145	4-φ18
65LG(R)36-20	6	180	1390	90	481	300	248	4-φ23	185	65	145	4-M16	185	65	145	4-φ18
65LG(R)36-20	7	180	1455	90	540	300	248	4-φ23	185	65	145	4-M16	185	65	145	4-φ18
65LG(R)36-20	8	180	1615	90	599	300	248	4-φ23	185	65	145	4-M16	185	65	145	4-φ18
Model	Stages	L	H	H1	H2	B	b	n-φd	Inlet Flange				Outlet Flange
									Dj	Djn	Dj2	n-dj	Dc	Dcn	Dc2	n-φdc
80LG(R)50-20	2	187	965	112	301	315	272	4-φ23	200	80	160	8-M16	200	80	160	8-φ18
80LG(R)50-20	3	187	1195	112	379	315	272	4-φ23	200	80	160	8-M16	200	80	160	8-φ18
80LG(R)50-20	4	187	1270	112	457	315	272	4-φ23	200	80	160	8-M16	200	80	160	8-φ18
80LG(R)50-20	5	187	1395	112	535	315	272	4-φ23	200	80	160	8-M16	200	80	160	8-φ18
80LG(R)50-20	6	187	1505	112	613	315	272	4-φ23	200	80	160	8-M16	200	80	160	8-φ18
80LG(R)50-20	7	187	1675	112	691	315	272	4-φ23	200	80	160	8-M16	200	80	160	8-φ18
80LG(R)50-20	8	187	1755	112	769	315	272	4-φ23	200	80	160	8-M16	200	80	160	8-φ18
100LG72-20	2	187	1185	122	343	315	272	4-φ23	220	100	180	8-M16	220	100	180	8-φ18
100LG72-20	3	187	1270	122	432	315	272	4-φ23	220	100	180	8-M16	220	100	180	8-φ18
100LG72-20	4	187	1390	122	521	315	272	4-φ23	220	100	180	8-M16	220	100	180	8-φ18
100LG72-20	5	187	1580	122	610	315	272	4-φ23	220	100	180	8-M16	220	100	180	8-φ18
100LG72-20	6	187	1655	122	699	315	272	4-φ23	220	100	180	8-M16	220	100	180	8-φ18
100LG72-20	7	187	1800	122	788	315	272	4-φ23	220	100	180	8-M16	220	100	180	8-φ18
100LG72-20	8	187	1900	122	877	315	272	4-φ23	220	100	180	8-M16	220	100	180	8-φ18
100LG72-20	9	187	2100	122	966	315	272	4-φ23	220	100	180	8-M16	220	100	180	8-φ18

Installation Method

Rigid Connection

1	Ball Valve	2	Flexible Joint	3	Pressure Gauge	4	Vacuum Gauge
5	Gate Valve	6	Elbow Pipe	7	Pressure Measuring Pipe	8	Concrete Base

 

Flexible Connection

1	Ball Valve	2	Flexible Joint	3	Pressure Measuring Pipe	4	Gate Valve	5	Elbow Pipe
6	Pump	7	Connection Plate	8	JGD Vibration Isolator	9		Concrete Base

Accessories & Installation Dimensions

OEM & Custom Solutions

Chaodun Pump provides OEM and ODM customization for LG vertical multistage pumps. Available materials: cast iron, stainless steel, bronze. Options for voltage, flange standard, outlet direction, and labeling. Suitable for distributors and project contractors worldwide.

FAQs for Oversea Buyers

1. What are LG pumps used for?
For high-rise building water supply, fire systems, and industrial circulation.

2. Can this pump handle hot water?
Yes, up to 105°C with standard configuration.

3. What’s the advantage of the detachable design?
Easy maintenance without removing piping or motor alignment.

4. Do you offer OEM branding?
Yes, we support customized color, logo, and export packaging.

5. How is the pump shipped?
Export wooden cases via sea or air.

6. What is the warranty period?
12 months after shipment.

7. Can I order small quantities for testing?
Yes, sample orders are accepted with flexible MOQ terms.