Stainless steel multi-stage pump

NegotiableUpdate on 05/24

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Nature of the Manufacturer: Producers

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Overview

QDL2-20 stainless steel multi-stage pump is also suitable for slightly alkaline water, mineral water, distilled water, swimming pool water, and other chloride containing liquids, but the allowable temperature of the liquid needs to be lowered.

Product Details

1、 Working conditions of QDLF2-20 stainless steel multi-stage pump
1. Cold and hot clean, non flammable and non explosive liquids that do not contain solid particles or fibers;
2. Liquid temperature: -15 ℃ to+120 ℃
3. Environmental temperature: High+40 ℃
4. Small inlet pressure: Based on the NPSH curve and a small safety head of 0.5 meters.

IIQDL2-20 stainless steel multi-stage pumpScope of application
QDL stainless steel multi-stage pumpThe regular type is suitable for liquid transmission, circulation and pressurization of hot and cold cleaning water and softened water.
QDLF stainless steel multi-stage pumpIt is also applicable to slightly alkaline water, mineral water, distilled water, swimming pool water, and other chloride containing liquids, but the allowable temperature of the liquid needs to be lowered.

IIIQDLF vertical multi-stage pumpTypical Applications
1.Applied to municipal water supply and boosting
2.Applied to industrial circulation systems and processing systems
3.multistage pumpApplied to boiler feedwater and condensate systems
4.QDL2-20 stainless steel multi-stage pumpApplied to household water supply
5.QDL pumpApplied to environmental water treatment, infiltration analysis system
6.Used for agricultural irrigation and dehydration
7.vertical pumpApplied to industrial plant cleaning and various cleaning tasks
8.Used for (other) many specialized purposes

Stainless steel multi-stage pumpPerformance Parameter Table
QDL2/QDLF2 Performance Parameter Table

model	Equipped with motor （kW）	Q m3/h	1	1.2	1.6	2	2.4	2.8	3.2	3.5
QDL2-20	0.37	H （m）	18	17	16	15	13	12	10	8
QDL2-30	0.37		27	26	24	22	20	18	15	12
QDL2-40	0.55		36	35	33	30	26	24	20	16
QDL2-50	0.55		45	43	40	37	33	30	24	20
QDL2-60	0.75		53	52	50	45	40	36	30	24
QDL2-70	0.75		63	61	57	52	47	41	35	28
QDL2-90	1.1		80	78	73	67	61	54	45	37
QDL2-110	1.1		98	95	89	82	73	64	54	44
QDL2-130	1.5		116	114	106	98	89	78	65	52
QDL2-150	1.5		134	130	123	112	10	90	73	60
QDL2-180	2.2		161	157	148	136	121	108	91	76
QDL2-220	2.2		197	192	180	165	148	130	110	90
QDL2-260	3		232	228	214	198	179	158	130	110

QDL4/QDLF4 Performance Parameter Table
model	Equipped with motor （kW）	Q m3/h	1.5	2.0	3.0	4.0	5.0	6.0	7.0	8.0
QDL4-20	0.37	H （m）	19	18	17	15	13	10	8	6
QDL4-30	0.55		28	27	26	24	20	18	13	10
QDL4-40	0.75		38	36	34	32	27	24	19	13
QDL4-50	1.1		47	45	43	40	34	31	23	17
QDL4-60	1.1		56	54	52	48	41	37	28	20
QDL4-80/7	1.5		66	63	61	56	48	43	33	24
QDL4-80	1.5		74	72	70	64	55	50	38	27
QDL4-100	2.2		96	90	87	81	71	62	48	34
QDL4-120	2.2		114	108	104	95	85	75	58	41
QDL4-160/14	3.0		136	126	122	112	101	89	68	48
QDL4-160	3.0		152	144	140	129	115	101	78	55
QDL4-190	4.0		183	171	168	153	137	122	93	67
QDL4-220	4.0		211	200	192	178	160	138	108	79

QDL8/QDLF8 Performance Parameter Table
model	Equipped with motor （kW）	Q m3/h	5	6	7	8	9	10	11	12
QDL8-20	0.75	H （m）	21	20	19	18	17	16	15	14
QDL8-30	1.1		31	30	29	28	26	24	23	20
QDL8-40	1.5		41	40	39	37	35	32	30	27
QDL8-50	2.2		52	50	48	46	44	41	37	34
QDL8-60	2.2		62	60	58	55	53	49	45	41
QDL8-80	3.0		83	80	78	74	70	65	60	54
QDL8-100	4.0		104	100	97	92	88	80	75	68
QDL8-120	4.0		125	120	116	110	105	97	90	81
QDL8-140	5.5		146	140	136	129	123	113	105	95
QDL8-160	5.5		166	160	155	147	140	130	120	108
QDL8-180	7.5		187	180	175	166	158	146	135	122
QDL8-200	7.5		208	200	194	185	175	162	150	135

QDL16/QDLF16 Performance Parameter Table
model	Equipped with motor （kW）	Q m3/h	8	10	12	14	16	18	20	22
QDL16-30/2	2.2	H （m）	28	27	26	25	23	21	19	17
QDL16-30	3.0		42	41	39	37	35	32	29	26
QDL16-40	4.0		56	54	52	50	47	44	38	34
QDL16-50	5.5		69	68	65	62	59	54	48	43
QDL16-60	5.5		83	81	78	75	70	64	58	52
QDL16-70	7.5		97	95	92	87	82	75	68	61
QDL16-80	7.5		111	108	105	100	94	86	77	70
QDL16-100	11		139	136	131	125	118	108	97	87
QDL16-120	11		167	163	157	150	141	129	116	105
QDL16-140	15		194	190	184	175	165	151	136	122
QDL16-160	15		222	217	210	200	189	173	155	140

Stainless steel multi-stage centrifugal pumprepairInstructions

Before the pump starts working, it should be confirmed that there is no power supply to the pump and the pump cannot suddenly start. The bearings and shaft seals of the pump do not require maintenance. If the pump is not in use for a long time and needs to be drained, one of the coupling guard plates can be removed, and a few drops of silicone oil can be injected into the shaft between the pump head and the coupling. This can prevent the shaft sealing surface from sticking. When installing the coupling guard, be sure that they are vertically aligned in the recess of the pump head. Before the pump starts working, it should be confirmed that there is no power supply to the pump and the pump cannot suddenly start. The bearings and shaft seals of the pump do not require maintenance. If the pump is not in use for a long time and needs to be drained, one of the coupling guard plates can be removed, and a few drops of silicone oil can be injected into the shaft between the pump head and the coupling. This can prevent the shaft sealing surface from sticking. When installing the coupling guard, be sure that they are vertically aligned in the recess of the pump head.Electric motor bearings:Electric motors without lubrication nozzles do not require maintenance. Electric motors equipped with lubrication nozzles should be lubricated with high-temperature lithium based grease. If the electric motor is used seasonally (for motors that are not used for more than six months a year), it is recommended to clean and lubricate the pump and motor once they are not in use.Frost protectionDuring frost, if the pump is not in use, the water should be drained to prevent damage and cracking. Loosen the exhaust screw on the pump head and remove the drain plug on the base to drain the pump. After the water is drained, the removed components should be reinstalled or properly stored. Pay attention that the discharged liquid will not cause harm to people, or damage to the motor or other components. In hot water systems, special attention should be paid to the risk of burns caused by hot water. Do not tighten the exhaust screw and resend the drain plug until the pump is reused. Before placing the drain plug back on the base, the bypass valve should be rotated out towards the stopper, as shown in Figure 7. Install the drain plug by tightening the large connecting nut under the bypass valve. The reinstallation program is still a reverse program operation for disassembly.

Troubleshooting of vertical multi-stage centrifugal pump

Fault	reason
1. The electric motor starts but does not rotate.	a) Power outage. b) The fuse is burnt out. c) The starter overload has been disconnected. d) The main contacts inside the starter are not in contact or there is a problem with the coil. e) The fuse in the control circuit is defective. f) There is a problem with the electric motor.
2. As soon as the power is turned on and the starter is overloaded, it will immediately trip off.	a) The fuse is burnt out. b) There is an issue with the overload contact of the starter. c) The cable connection is loose or faulty. d) The electric motor unit has defects. e) The pump is mechanically blocked. f) The overload setting is too low.
3. The starter occasionally trips due to overload.	a) The overload setting is too low. b) Low voltage during peak hours.
4. The protector has never tripped, but the pump is not running.	a) Check 1 a), b), c), and e)
5. The flow rate of the pump is unstable.	a) The inlet pressure of the pump is too low. b) The suction pipe/pump is partially blocked by impurities. c) The pump has drawn in air.
6. The pump is running but not producing water.	a) The suction pipe/pump is blocked by impurities. b) The base or check valve is blocked in the closed position. c) Leakage of suction pipe. d) There is air inside the suction pipe or pump. e) The direction of rotation of the electric motor is incorrect.
7. Reverse when the pump is turned off.	a) The suction pipe is leaking. b) The base or check valve is faulty. c) The base valve is blocked in the open or partially open position. d) The check valve is leaking or blocked in some open positions.
8. Leakage of shaft seal.	a) The position of the pump shaft is incorrect. b) The shaft seal is faulty.
9. Noise.	a) There is an air phenomenon inside the pump. b) Due to the incorrect position of the inner shaft of pump 1, the pump cannot rotate freely (due to frictional resistance). c) There is resonance at the installation location.

Stainless steel multi-stage pumpOrdering Notice:
1、 ① Product name andpumpModel ②pumpCaliber ③ stainless steel multi-stage pumpHead (m) ④ Corrosion resistant multi-stage pumpTraffic ⑤Motor power (KW) ⑥Vertical lightweight multi-stage pumpSpeed (r/min) ⑦Voltage [V] ⑧ Stainless steel multi-stage pumppumpMaterial ⑨Vertical lightweight multi-stage pumpDo you have any attachments so that we can make the correct selection for you.
2、 If our company has already been selected by the design unitProduct model, please pressmultistage pumpOrder the model directly from the company's sales department.
3、 When the usage situation 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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