Stainless steel multi-stage centrifugal pump

Overview of QDL/QDLF Stainless Steel Multistage Centrifugal Pump

The QDLF vertical stainless steel multi-stage pump is designed based on the advantages of the ISG and DL vertical multi-stage centrifugal pumps from Shanghai Zhongqiu Pump Industry Co., Ltd. The structure adopts a vertical and segmented form, with the suction and discharge ports of the pump designed in a straight line below, and a hydraulic model is used. The axial force of the pump is solved by hydraulic balance method, and the residual axial force is borne by a ball bearing, thus ensuring smooth operation, low noise, small footprint, and convenient decoration. The outer cylinder of the vertical stainless steel multi-stage pump is made of stainless steel, which has a beautiful appearance and is particularly suitable for parallel use of multiple pumps in high-rise buildings to reduce the power of a single pump unit and simplify electrical control equipment. Suitable for fire protection, domestic water supply, air conditioning unit circulation, and cooling water delivery in residential buildings, hospitals, hotels, department stores, office buildings, and other high-rise and low rise buildingsWait.

Characteristics of QDL/QDLF stainless steel multi-stage centrifugal pump

1. The stainless steel multi-stage pump adopts excellent hydraulic models and advanced manufacturing processes, greatly improving the performance and service life of the pump.
2. Stainless steel multi-stage pumps use mechanical seals made of hard alloy and fluororubber as shaft seals, which can improve the reliability of pump operation and the temperature of the conveying medium.
3. The overcurrent part of the stainless steel multi-stage pump is made of stainless steel plate stamped and welded, making the pump suitable for mildly corrosive media.
4. The stainless steel multi-stage pump has a compact overall structure, small volume, light weight, low noise, energy saving, and easy maintenance.
5. The inlet and outlet of the stainless steel multi-stage pump are located on the same horizontal line as the pump seat, and can be directly used in pipelines.
6. The stainless steel multi-stage pump adopts a standard motor, and users can easily equip the motor according to their needs.
7. Stainless steel multi-stage pumps can be equipped with intelligent protectors according to user needs to effectively protect the pump from dry running, phase loss, overload, etc.


QDL/QDLF stainless steel multi-stage centrifugal pump model







Application of QDL/QDLF stainless steel multi-stage centrifugal pump


Water supply: filtration and transportation of water plants, water supply to different zones of water plants, main pipeline pressurization, and pressurization of high-rise buildings. Industrial pressurization: process water system, cleaning system, high-pressure flushing system, fire protection system. Industrial liquid transportation: cooling and air conditioning systems, boiler feedwater and condensing systems, machine tool matching, and transportation of acidic and alkaline media. Water treatment: ultrafiltration system, reverse osmosis system, distillation system, separator, and water treatment system for swimming pools. Irrigation: farmland irrigation, sprinkler irrigation, drip irrigation.

QDL/QDLF stainless steel multi-stage centrifugal pump structure

Lightweight vertical multi-stage centrifugal pump QDL, QDLF2,4

serial number	name	material
1	motor	cast iron
2	motor mount	stainless steel
3	mechanical seal	stainless steel
4	Export guide vane	stainless steel
5	Guide vane with bearing seat	stainless steel
6	flow guide	stainless steel
7	Import guide vane	stainless steel
8	Pump seat	stainless steel
9	Base B	cast iron
10	Bearing B	cemented carbide
11	impeller	stainless steel
12	axis	stainless steel
13	Impeller spacer	stainless steel
14	pressure cylinder	stainless steel
15	coupling	powder metallurgy

Lightweight vertical multi-stage centrifugal pump QDL, QDLF8,16

serial number	name	material
1	motor	cast iron
2	motor mount	stainless steel
3	mechanical seal	stainless steel
4	Export guide vane	stainless steel
5	Guide vane with bearing seat	stainless steel
6	flow guide	stainless steel
7	Import guide vane	stainless steel
8	Pump seat	stainless steel
9	Base B	cast iron
10	bearing	cemented carbide
11	impeller	stainless steel
12	axis	stainless steel
13	Impeller spacer	stainless steel
14	pressure cylinder	stainless steel
15	coupling	powder metallurgy

Lightweight vertical multi-stage centrifugal pump QDL, QDLF32

serial number	name	material
1	motor mount	cast iron
2	Pump cap seat	stainless steel
3	mechanical seal	stainless steel
4	Export guide vane	stainless steel
5	Guide vane with bearing seat	stainless steel
6	flow guide	stainless steel
7	Import guide vane	stainless steel
8	Pump seat	stainless steel
9	Base B	cast iron
10	Lower shaft cover	cemented carbide
11	impeller	stainless steel
12	axis	stainless steel
13	Intermediate shaft sleeve	stainless steel
14	pressure cylinder	stainless steel
15	coupling	powder metallurgy

Use of QDL/QDLF stainless steel multi-stage centrifugal pump


1. Medium temperature: -15 ℃~+120 ℃.
2. The ambient temperature is+40 ℃.
3. Environmental pressure: 10 bar.
4. The import pressure is limited by the environmental pressure.
5. When the density or viscosity of the conveying medium is greater than that of water, it is necessary to consider using a high-power motor.
6. Transport medium: A. Thin, clean, non flammable and explosive medium that does not contain solid particles or fibers. B、 Such as mineral water, softened water, pure water, clear oil, and other light chemical media. C、 The main material of the vertical stainless steel multi-stage pump is stainless steel, which can be used to pump mildly corrosive media.

Performance parameters and dimension diagram of QDL/QDLF stainless steel multi-stage centrifugal pump

QDL2, QDLF2 lightweight vertical multi-stage centrifugal pump

model	Equipped with motor	Q （m3/h）	1	1.2	1.6	2	2.4	2.8	3.2	3.5	B1	B2	B1+B2	D1	D2	weight （kg）
QDLF2-20	0.37	H （m）	18	17	16	15	13	12	10	8	245	215	460	145	118	19
QDLF2-30	0.37		27	26	24	22	20	18	15	12	263	215	478	145	118	19
QDLF2-40	0.55		36	35	33	30	26	24	20	16	281	215	496	145	118	20
QDLF2-50	0.55		45	43	40	37	33	30	24	20	299	215	514	145	118	20
QDLF2-60	0.75		53	52	50	45	40	36	30	24	322	257	579	175	134	25
QDLF2-70	0.75		63	61	57	52	47	41	35	28	340	257	597	175	134	25
QDLF2-90	1.1		80	78	73	67	61	54	45	37	376	257	633	175	134	30
QDLF2-110	1.1		98	95	89	82	73	64	54	44	412	257	669	175	134	30
QDLF2-130	1.5		116	114	106	98	89	78	65	52	465	265	730	195	140	35
QDLF2-150	1.5		134	130	123	112	100	90	73	60	501	265	766	195	140	35
QDLF2-180	2.2		161	157	148	136	121	108	91	76	555	290	845	195	140	40
QDLF2-220	2.2		197	192	180	165	148	130	110	90	627	290	917	195	140	45
QDLF2-260	3		232	228	214	198	179	158	130	110	702	325	1027	215	160	50

QDL4, QDLF4 stainless steel multi-stage centrifugal pump

model	Equipped with motor （KW）	Q （m3/h）	1.5	2	3	4	5	6	7	8	B1	B2	B1+B2	D1	D2	weight （kg）
QDLF4-20	0.37	H （m）	19	18	17	15	13	10	8	6	263	215	478	145	118	19
QDLF4-30	0.55		28	27	26	24	20	18	13	10	290	215	505	145	118	20
QDLF4-40	0.75		38	36	34	32	27	24	19	13	321	257	578	175	134	20
QDLF4-50	1.1		47	45	43	40	34	31	23	17	348	257	605	175	134	25
QDLF4-60	1.1		56	54	52	48	41	37	28	20	375	257	632	175	134	25
QDLF4-70	1.5		66	63	61	56	48	43	33	24	419	265	648	195	140	30
QDLF4-80	1.5		74	72	70	64	55	50	38	27	446	265	711	195	140	30
QDLF4-100	2.2		96	90	87	81	71	62	48	34	500	290	790	195	140	30
QDLF4-120	2.2		114	108	104	95	85	75	58	41	554	290	844	195	140	35
QDLF4-140	3		136	126	122	112	101	89	68	48	611	325	936	215	160	35
QDLF4-160	3		152	144	140	129	115	101	78	55	665	325	990	215	160	40
QDLF4-190	4		183	171	168	153	137	122	93	67	746	340	1086	240	178	45
QDLF4-220	4		211	200	192	178	160	138	108	79	827	340	1167	240	178	50

QDL8, QDLF8 stainless steel multi-stage centrifugal pump

model	Equipped with motor （KW）	Q （m3/h）	5	6	7	8	9	10	11	12	B1	B2	B1+B2	D1	D2	weight （kg）
QDLF8-20	0.75	H （m）	21	20	19	18	17	16	15	14	371	257	628	175	134	25
QDLF8-30	1.1		31	30	29	27	26	24	23	20	401	257	658	175	134	30
QDLF8-40	1.5		41	40	39	36	35	32	30	27	436	265	701	195	140	30
QDLF8-50	2.2		52	50	48	45	44	41	37	34	466	290	756	195	140	40
QDLF8-60	2.2		62	60	58	54	53	49	45	41	496	290	786	195	140	40
QDLF8-80	3		83	80	78	73	70	65	60	54	561	325	886	215	160	45
QDLF8-100	4		104	100	97	92	88	80	75	68	621	340	961	240	178	55
QDLF8-120	4		125	120	116	111	105	97	90	81	681	340	1021	240	178	55
QDLF8-140	5.5		146	140	136	130	123	113	105	95	776	403	1179	275	206	80
QDLF8-160	5.5		166	160	155	148	140	130	120	108	836	403	1239	275	206	80
QDLF8-180	7.5		187	180	175	167	158	146	135	122	896	403	1299	275	206	90
QDLF8-200	7.5		208	200	194	186	175	162	150	135	956	403	1359	275	206	90

QDL16, QDLF16 stainless steel multi-stage centrifugal pump

model	Equipped with motor （KW）	Q （m3/h）	8	10	12	14	16	18	20	22	B1	B2	B1+B2	D1	D2	weight （kg）
QDLF16-20	2.2	H （m）	28	27	26	25	22	21	19	17	406	290	696	195	140	40
QDLF16-30	3		42	41	39	37	34	32	29	26	456	325	781	215	160	50
QDLF16-40	4		56	54	52	50	46	44	38	34	501	340	841	240	178	55
QDLF16-50	5.5		69	68	65	62	58	54	48	43	581	403	984	275	206	70
QDLF16-60	5.5		83	81	78	75	70	64	58	52	626	403	1029	275	206	75
QDLF16-70	7.5		97	95	92	87	82	75	68	61	671	403	1074	275	206	80
QDLF16-80	7.5		111	108	105	100	94	86	77	70	716	403	1119	275	206	80
QDLF16-100	11		139	136	131	125	118	108	97	87	836	505	1341	330	255	140
QDLF16-120	11		167	163	157	150	141	129	116	105	926	505	1431	330	255	145
QDLF16-140	15		194	190	184	175	166	151	136	122	1016	505	1521	330	255	160
QDLF16-160	15		222	217	210	200	189	173	155	140	1106	505	1611	330	255	165

1、 ① Product Name and Stainless Steel Multistage Centrifugal Pump Model ② Stainless Steel Multistage Centrifugal Pump Diameter ③ Stainless Steel Multistage Centrifugal Pump Head (m) ④ Stainless Steel Multistage Centrifugal Pump
Grade centrifugal pump flow rate ⑤ Stainless steel multi-stage centrifugal pump motor power (KW) ⑥ Stainless steel multi-stage centrifugal pump speed (r/min) ⑦ Stainless steel multi-stage centrifugal pump voltage [V] ⑧ Stainless steel multi-stage centrifugal pump material and stage ⑨ Whether the stainless steel multi-stage centrifugal pump comes with accessories for us to correctly select for you.
2、 If the design unit has already selected our company's stainless steel multi-stage centrifugal pump product model, please order directly from the sales department of Zhongqiu Pump Industry Company according to the stainless steel multi-stage centrifugal pump model.
3、 When the usage is very important or the environment is complex, please provide design drawings and detailed parameters as much as possible, and our technical experts from Zhongqiu Pump Industry will review and control them for you



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