Reference image. Final construction follows the confirmed model and quotation.

Vertical Multistage Pumps

DL Vertical Multistage Centrifugal Pump

Name: DL Vertical Multistage Centrifugal Pump
Brand: DFIN PUMP
SKU: DL

Model: DL

DL Vertical Multistage Centrifugal Pump is designed for clean-water transfer, pressure boosting, circulation and general industrial service. DFIN Pump provides model verification, material selection and technical support based on the actual duty point.

TECHNICAL DATA

Specifications, performance and construction

Confirm the final operating point, materials, motor and connection standard before ordering.

Product Overview

DL Vertical Multistage Centrifugal Pump is an industrial centrifugal pump selected for clean-water transfer, pressure boosting, circulation and general industrial service. The final configuration should be verified against the actual liquid, duty point, temperature, installation and power supply.

Typical Applications

Clean-water transfer, pressure boosting, circulation and general industrial service.

Design Features

Compact hydraulic design
Stable flow with low vibration
Multiple materials and motor options
Model and material selection supported by DFIN Pump engineers

Extracted Operating Data

：≤2.4Mpa
：0-+90℃
：4.2-504m3/h
：1.5-450kw

Values are reference data from the authorized source catalog. Confirm the selected model before ordering.

Technical Performance Data

No.	name	Material or Model	No.	name	Material or Model
1	Electric machine	Y series (V5) 4 poles	12	Water outlet section	HT200
2	Coupling	HT200	13	Balance set	HT200
3	elastic block	Rubber	14	balanced drum	HT200
4	Bearing gland	HT200	15	Final guide vane	HT200
5	Bearing and cap	45	16	middle section	HT200
6	Bearing box	HT200	17	guide ye	HT200
7	Bearing	180 series	18	leaf wheel	HT200
8	Water retaining cover	45	19	Water outlet section	HT200
9	Asbestos gland	HT200	20	Lower shaft sleeve	45
10	asbestos	asbestos	21	Lower bearing	copper alloy
11	Stuffing box body	HT200	22	axis	45、2Cr13

DL type vertical multi-stage centrifugal pump
model	Series	Flow (m3/h)	Flow(L/S)	Yang Cheng (m)	Speed (r/min)	Shaft Power(kw)	Motor Power(kw)	efficiency (%)	suction process (m)	NPSHr (m)
40DL	2	6.2	1.72	23.6	1450	0.92	1.5	40	7	3.19
	3	6.2	1.72	35.4		1.38	2.2	40	7	3.19
	4	6.2	1.72	47.2		1.84	3	40	7	3.19
	5	6.2	1.72	59		2.30	4	40	7	3.19
	6	6.2	1.72	70.8		2.75	4	40	7	3.19
	7	6.2	1.72	82.6		3.22	5.5	40	7	3.19
	8	6.2	1.72	94.4		3.68	5.5	40	7	3.19
	9	6.2	1.72	106.2		4.14	7.5	40	7	3.19
	10	6.2	1.72	118		4.60	7.5	40	7	3.19
	11	6.2	1.72	129.8		5.06	7.5	40	7	3.19
	12	6.2	1.72	141.6		5.52	11	40	7	3.19
50DL	2	12.6	3.5	24.4	1450	1.55	3	54	7.6	2.66
	3	12.6	3.5	36.6		2.33	3	54	7.6	2.66
	4	12.6	3.5	48.8		3.10	4	54	7.6	2.66
	5	12.6	3.5	61		3.88	5.5	54	7.6	2.66
	6	12.6	3.5	73.2		4.65	5.5	54	7.6	2.66
	7	12.6	3.5	85.4		5.43	7.5	54	7.6	2.66
	8	12.6	3.5	97.6		6.20	7.5	54	7.6	2.66
	9	12.6	3.5	109.8		6.98	11	54	7.6	2.66
	10	12.6	3.5	122		7.75	11	54	7.6	2.66
65DL	2	30	8.33	32	1450	4.22	5.5	62	7.6	2.82
	3	30	8.33	48		6.33	7.5	62	7.6	2.82
	4	30	8.33	64		8.44	11	62	7.6	2.82
	5	30	8.33	80		10.55	15	62	7.6	2.82
	6	30	8.33	96		12.66	15	62	7.6	2.82
	7	30	8.33	112		14.77	18.5	62	7.6	2.82
	8	30	8.33	128		16.88	22	62	7.6	2.82
	9	30	8.33	144		18.99	22	62	7.6	2.82
	10	30	8.33	160		21.1	30	62	7.6	2.82
80DL	2	50.4	14	40	1450	7.84	11	70	7.8	22.49
	3	50.4	14	60		11.76	15	70	7.8	2.49
	4	50.4	14	80		15.68	22	70	7.8	2.49
	5	50.4	14	100		19.60	30	70	7.8	2.49
	6	50.4	14	120		23.52	30	70	7.8	2.49
	7	50.4	14	140		27.44	37	70	7.8	2.49
	8	50.4	14	160		31.36	45	70	7.8	2.49
	9	50.4	14	180		35.28	45	70	7.8	2.49
	10	50.4	14	200		39.20	55	70	7.8	2.49
100DL -72-20	2	72	20	40	1450	10.9	15	72	8	2.8
	3	72	20	60		10.9	18.5	72	8	2.8
	4	72	20	80		10.9	30	72	8	2.8
	5	72	20	100		10.9	37	72	8	2.8
	6	72	20	120		10.9	37	72	8	2.8
	7	72	20	140		10.9	45	72	8	2.8
	8	72	20	160		10.9	55	72	8	2.8
	9	72	20	180		10.9	55	72	8	2.8
	10	72	20	200		54.4	70	72	8	2.8
100DL- 100-20	2	100	27.8	40	1450	15.14	18.5	72	7.2	3.53
	3	100	27.8	60		22.72	30	72	7.2	3.53
	4	100	27.8	80		30.28	37	72	7.2	3.53
	5	100	27.8	100		37.86	45	72	7.2	3.53
	6	100	27.8	120		45.39	55	72	7.2	3.53
	7	100	27.8	140		53.0	75	72	7.2	3.53
	8	100	27.8	160		60.57	75	72	7.2	3.53
	9	100	27.8	180		68.14	90	72	7.2	3.53
	10	100	27.8	200		75.71	90	72	7.2	3.53
150DL- 150-20	2	150	27.8	40	1450	20.42	30	80	5.7	2.8
	3	150	27.8	60		30.63	37	80	5.7	2.8
	4	150	27.8	80		40.84	45	80	5.7	2.8
	5	150	27.8	100		51.05	55	80	5.7	2.8
	6	150	27.8	120		61.26	75	80	5.7	2.8
	7	150	27.8	140		74.47	75	80	5.7	2.8
	8	150	27.8	160		81.68	90	80	5.7	2.8
200DL- 280-30	2	280	41.6	60	1450	55.79	90	84	6.0	3.7
	3	280	41.6	90		83.69	110	84	6.0	3.7
	4	280	41.6	120		111.57	132	84	6.0	3.7
	5	280	41.6	150		139.47	160	84	6.0	3.7
	6	280	41.6	180		163.38	200	84	6.0	3.7

Fault phenomena

Possible causes

Corrective Action

The water pump does not absorb water and the pointers of the pressure gauge and vacuum gauge jump violently.

1. Insufficient irrigation and water diversion

2. Air leakage at the connection between pipeline and instrument

3.Suction Lift is too high

1. Check whether the bottom valve is leaking. Then divert enough water

2. Tighten the leakage point

3. Reduce water absorption height

The water pump does not absorb water. The vacuum gauge indicates a high vacuum.

1. The bottom valve is not open or blocked

2. The resistance of the water suction pipeline is too large

3. Filter clogged

1. Check the bottom valve

2. Replace the water absorber

3. Clean the filter

The pressure gauge has pressure but still no water comes out

1. The water outlet pipe has too much resistance

2. Wrong direction of rotation

3.The outlet pipe valve is not open

4. Impeller clogged

1. Check or cut off the water pipes

2. Check the Motor. Adjust each other.

3.Open the Outlet valve

4. Clear the dirt in the impeller

Unable to achieve design flow

1. Inhalation of air

2. Due to the lowering of water level and insufficient submergence depth,

3. There is foreign matter blocking the impeller.

4. The rotor part is severely worn

1. Check the air leakage part and eliminate it

2. Extend the suction pipe and deepen the flooding depth.

3. Disassemble and remove foreign matter

4. Replace the broken seal

The pump consumes too much power

1. The packing is pressed too tightly and generates heat.

2. Excessive displacement

3. There is a collision between the rotary body and the shell.

4. Pump bearing wear

5. Pump shaft bent

1. Relax appropriately

2. Close the gate valve opening.

3. Trim

4. Replace bearings

5. Replacement or correction

Increased pump vibration

1. The impeller is partially blocked

2. The impeller is damaged

3.Flow is too small

4. The pump shaft and the motor are not concentric

5. Bearing damage

6. Air is mixed in and cavitation occurs.

1. Disassemble and remove foreign matter

2. Replacement

3. Open the Outlet valve slightly

4. Fixed point correction

5. Replacement

6. Change the suction position and improve the water suction pipe

Selection Information Required

Please provide medium, concentration, flow, total head or pressure, temperature, viscosity or solids, voltage, frequency and installation method. DFIN Pump will confirm the suitable model and materials.

Catalog reference: authorized YZJ product data · Model DL

SELECTION SUPPORT

Application-based pump selection

Send the liquid, flow, head or pressure, temperature, solids, installation, power supply and destination for a verified recommendation.

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