Weiwang manufacturer: QDLF vertical multi-stage stainless steel centrifugal pump

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, while 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 ℃
Zui high ambient temperature:+40 ℃
Altitude: up to 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.

motor

The motor is a fully enclosed, air-cooled standard motor with two poles.
Protection level: IP55
Insulation level: F
Zui 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 minimum pressure and maximum suction stroke H [m] on the inlet side of the pump, which 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] (can be read from the maximum possible flow rate of the pump on the NPSH curve). Hf=inlet pipeline loss [m]. Hv=vapor pressure [m]. Hs=safety margin=minimum 0.5m head. If the calculated value of H is positive, the QDLF vertical stainless steel multi-stage centrifugal pump can operate under the maximum suction range. If the calculated value of H is negative, there must be a minimum 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 feasible
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 maximum ambient temperature is+40 ℃. 3. The maximum ambient pressure is 10 bar. 4. The maximum import pressure is limited by the maximum 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