Specifications

Vertical multistage pump
Flow rate 1~200m3/h
Delivery head: 4~300m
Liquid temperature: -15 ~ +120

CDLF vertical multistage pump  

 

 

Pump

 

CDL/CDLF is a kind of vertical non-self priming multistage centrifugal pump,which is driven by a standard electric motor. The motor output shaft directly connects with the pump shaft through a coupling. The pressure-resistant cylinder and flow passage components are fixed between pump hesd and in-and outlet section with tie-bar bolts. The inlet and outlet are located at the pump bottom at the same plane. This kind of pump can be equipped with an intelligent protector to effectively prevent it from dry-running, out-of-phase and overload.

 

Electric motor

 

1.Full-enclosed air-blast two-pole standard motor.
2.Protection class: IP55
3.Insulation class: F
4. Standard voltage: 50Hz: 1 x 220-230 / 240V
                                                 3 x 200-220 / 346-380V
                                                 3 x 220-240 / 380-415V
                                                 3 x 380-415V

 

Minimum inlet pressure NPSH

In case that the pressure in pump is lower than the steam pressure used to convey liquid, the cavitations will occur. To avoid cavitations, a minimum pressure at the inlet side of the pump shall be guaranteed. The maximum suction stroke can be calulated with following formula: H=Pb x 10.2-NPSH-Hf-Hs
Pb=atmosphere pressure [bar]
       (can be set as 1bar)
In a closed system, Pb means system pressure [bar]
NPSH=Nct positive suction head [m]
(It can be read out from the point of possible max. flow rate shown on NPSH curve)
Hf=Pipeline loss at the inlet [m]
Hv= Steam pressure [m]
Hs= Safety margin=Minimum 0.5m delivery head
If the calculated result H is positive, the pump may run under the max. Suction stroke H.
In case the calculated result H is negative, a delivery head of min.Inlet pressure is necessary.

 

 

 

 

  Max.Working pressure

The following figure shows the limitation of pressure and temperature, which shall be in the scope as shown in the figure.

Max.Ambient temperature

 

When the pump operates under ambient temperature higher than 40 °C or under altitude higher than 1000m, because of low air density and poor cooling effects, the motor output power P2 will be decreased to certain extent. If the pump is operated under the above-said conditions, it should be equipped with motor of higher power.

Material CDL/CDLF1,2,3,4

NO.	Name	Material	AISI/ASTM
1	Motor
2	Pump head	Cast iron	ASTM25B
4	Mechanical seal
5	Top diffuser	Stainless steel	AISI304
6	Diffuser	Stainless steel	AISI304
7	Support diffuser	Stainless steel	AISI304
8	Inducer	Stainless steel	AISI304
11	Bearing	Tungesten carbide
12	Impeller	Stainless steel	AISI304
13	Shaft	Stainless steel	AISI304 AISI316L
14	Impeller sleeve	Stainless steel	AISI304
15	Cylinder	Stainless steel	AISI304
16	Coupling	Carbon steel
CDLF
3	Seal base	Stainless steel	AISI304
9	Inlet and outlet chamber	Stainless steel	AISI304
10	Base plate	Cast iron	ASTM25B
CDL
9	Inlet and outlet chamber	Cast iron	ASTM25B

 

  Product range

Description	CDL1	CDL2	CDL3	CDL4	CDL8	CDL12	CDL16	CDL20	CDL32	CDL42	CDL65	CDL85
Rated flow[m3/h]	1	2	3	4	8	12	16	20	32	42	65	85
Rated flow[l/s]	0.28	0.56	0.83	1.1	2.2	3.3	4.4	5.6	8.9	11.7	18	24
Flow range[m3/h]	0.4-2	1-3.5	1.2-4	1.5-7	5-12	7-16	8-22	10-28	16-40	25-55	30-80	50-110
Flow range[l/s]	0.11-0.56	0.28-0.97	0.33-1.1	0.42-1.9	1.4-3.3	1.9-4.4	2.2-6.1	2.8-7.8	4.4-11.1	6.9-15.3	8.3-22.2	13.8-30.5
ure[bar]	21	23	22	21	21	22	22	23	26	30	22	17
Motor power[kW]	0.37-2.2	0.37-3	0.37-3	0.37-4	0.75-7.5	1.5-11	2.2-15	1.1-18.5	1.5-30	3.0-45	4.0-45	5.5-45
Temperature range[°C]	-15~+120
Max.efficiency[%]	44	46	54	57	62	63	66	69	73	75	76	77
Type
CDL	·	·	·	·	·	·	·	·	·	·	·	·
CDLF	·	·	·	·	·	·	·	·	·	·	·	·
CDL Pipe connection
DIN Flange	DN25	DN25	DN25	DN32	DN40	DN50	DN50	DN50	DN65	DN80	DN100	DN100
Oval Flange	G1	G1	G1	G11/4	G11/2
CDLF Pipe connection
Din Flange	DN25	DN25	DN25	DN32	DN40	DN50	DN50	DN50	DN65	DN80	DN100	DN100
Cutting ferrule joint	·	·	·	·	·	·	·	·
Pipe thread	·	·	·	·	·	·	·	·

PRODUCTION PROCESS SCHEME