QDLF vertical multi-stage stainless steel centrifugal pump-Fornitore globale

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QDLF vertical multi-stage stainless steel centrifugal pump

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1、 QDLF vertical stainless steel multi-stage centrifugal pump product overview:

QDLF vertical stainless steel multi-stage centrifugal pump is a multifunctional product that can transport various media from tap water to industrial liquids, suitable for different temperature, flow rate, and pressure ranges, QDL is suitable for non corrosive liquids, QDLF vertical stainless steel multi-stage centrifugal pump is suitable for mildly corrosive liquids.
The main components of QDLF vertical stainless steel multi-stage centrifugal pump, such as impeller, guide vane, pump shaft, and outer cylinder, are made of stainless steel. All overcurrent components of QDL (N) series are made of stainless steel, which has good corrosion resistance. They use hard alloy bearings and mechanical seals, and are driven by rigid couplings. They have the characteristics of small volume, light weight, corrosion resistance, low vibration, low noise, small footprint, long service life, and beautiful appearance, especially high efficiency and energy saving.

2、 QDLF vertical stainless steel multi-stage centrifugal pump model meaning:

3、 Working conditions of QDLF vertical stainless steel multi-stage centrifugal pump:

Thin, clean, non flammable and non explosive liquid that does not contain solid particles or fibers.
Liquid temperature: Room temperature type -15 ℃ to+70 ℃ Hot water type+70 ℃ to 120 ℃
High ambient temperature:+ 40℃
Altitude: 1000m

4、 QDLF vertical stainless steel multi-stage centrifugal pump application scope:

The regular type is suitable for liquid transmission, circulation and pressurization of hot and cold cleaning water and softened water. QDLF vertical stainless steel multi-stage centrifugal 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 reduced.

5、 Typical applications of QDLF vertical 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, acid and alkali.
Water treatment: ultrafiltration system, reverse osmosis system, distillation system, separator, swimming pool.
Irrigation: farmland irrigation, sprinkler irrigation, drip irrigation.

electric machinery:

The motor is a fully enclosed, air-cooled standard motor with two poles.
Protection level: IP55
Insulation level: F
Small import pressure NPSH:
If the pressure of the QDLF vertical stainless steel multi-stage centrifugal pump is lower than the vapor pressure of the conveyed liquid, cavitation may occur. To avoid cavitation, ensure that there is a small pressure on the inlet side of the pump, and the large suction stroke H [m] can be calculated according to the following formula: H=Pb×10.2-NPSH-Hf-Hv-Hs

In the formula: Pb=atmospheric pressure [bar] (atmospheric pressure can be set to 1 bar), in a closed system, Pb is the system pressure [bar]. NPSH=net positive suction head [m] (which can be read from the possible high flow rate of the pump on the NPSH curve). Hf=inlet pipeline loss [m]. Hv=vapor pressure [m]. Hs=safety margin=0.5m head less. If the calculated value of H is positive, the QDLF vertical stainless steel multi-stage centrifugal pump can operate under high suction conditions. If the calculated value of H is negative, there must be a small inlet pressure of H for the water head.
Parallel operation:
Parallel connection of multiple QDLF vertical stainless steel multi-stage centrifugal pumps to replace one large pump may be more advantageous
In a variable flow system, adapt to the required operating point of the system.
Increase the possibility of water supply, as the failure of QDLF vertical stainless steel multi-stage centrifugal pump only affects a portion of the system's flow rate.

6、 QDLF vertical stainless steel multi-stage centrifugal pump usage conditions:

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. 4、 Transport medium 1: A non flammable and explosive medium that is thin, clean, and free of solid particles or fibers. 2. Such as mineral water, softened water, pure water, clear oil, and other light chemical media. 3. The main material of the vertical stainless steel multi-stage pump is stainless steel, which can be used to pump mildly corrosive media. 5、 The motor selected is a fully enclosed, air-cooled bipolar standard motor. Protection level: IP55 Insulation level: F Standard voltage (50Hz): single-phase 220V, three-phase 220V/380V

Typical applications of QDLF vertical stainless steel multi-stage centrifugal pump:

Performance parameter table of QDL2/QDLF2 stainless steel multi-stage centrifugal pump
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

Performance parameter table of QDL4/QDLF4 stainless steel multi-stage centrifugal pump
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

Performance parameter table of QDL8/QDLF8 stainless steel multi-stage centrifugal pump
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

Performance parameter table of QDL16/QDLF16 stainless steel multi-stage centrifugal pump
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

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