Stainless steel horizontal single stage centrifugal pump
Technical parameters: Flow range: 3m³/h ~ 200m³/h Head range: 10m ~ 70m Ambient temperature: -20℃ ~ +100℃ Applications: industrial pressurization, water supply, boiler water supply, condensing system, cooling and air conditioning, water treatment Application: Water supply system Material: Stainless steel
Description
Stainless steel horizontal single stage centrifugal pump
Introduction
ZS Stainless steel horizontal single-stage centrifugal pump is made by advanced techniques such as pressingbulging welding of corrosion resistant plate. It is a new generation centrifugal pump initiated in China and mayreplace traditional IS pump and common corrosion proof pump. It features beautiful appearance, light and handystructure, high efficiency and energy saving, durable, corrosion proof, low noise, etc.
Application
ZS Stainless steel horizontal single-stage centrifugal pump is a sort of multifunction product with wide ap-plication. It may transmit various mediums including water or industrial liquid and is suitable for different tem-perature, flow rate and range of pressure. Its typical application mainly includes the following aspects:
●Water supply: filtration in water works, transportation and subarea water carriage, pressurization of mainduct;
●Industrial pressurization: flow wetting system, cleaning system;
●Transportation of industrial liquid: water supply of boiler, condensed system, cooling and air conditioningsystem, machine tool support, light acid and alkali transportation;
●Water treatment: distilled water system or separator, swimming pool, etc.;
●Farmland irrigation, medicine and sanitation, etc.
Minimum inlet pressure NPSH
In case that the pressure in pump is lower than the steam pressure used to convey liquid, the cavitations willoccur. To avoid cavitations, a minimum pressure at the inlet side of the pump shall be guaranteed. The maximumsuction stroke can be calculated with following formula:
H=Pbx 10.2-NPSH-Hf-Hv-Hs
Pb - Atmosphere pressure (bar)
In a closed system, Pb means system pressure (bar)
NPSH - Net positive suetion head (m)
It can be read from the point of Max.flow rate shown on NPSH curve.
Hf- Pipeline loss at the inlet (m)
It is in accordance with pipeline possible Max. Flow.
Hv - Steam pressure (m)
It depends on liquid temperature and steam pressure value.
Hs - Safety margin (m)
Minimum 0.5m delivery head.
If the calculated result H is negative, the pump may run under the Max. Suction head H. In case the calculateeresult H is negative, a delivery head of Min. Inlet pressure is necessary.
Note: Normally, the above calculation will not be done. H is calculated in the following conditions:
1, The liquid temperature is comparatively higher;
2, Liquid flow exceeds rated value;
3, Suction head is comparatively large or inlet pipeline long;
4, System pressure is too low;
5, Bad inlet condition.
Installation Requirements
The shaft connectiontype of ZSpump is direct connection. The pumpis composed of pump, shaft and stand-ard motor.
●The pump shall be installed on the ventilating and anti-freezing place;
●The installationof the pump shall ensure thatthe pump willnot be forcedby the tensionof the pipeline;
●If the pump is installed outdoor, suitableouter cover must be used to prevent electric elements from water inflow or coagulating dew;
●To facilitate inspection and maintenance, enough space must be left around the machine group;
●Electric wiring device shall guarantee that the pump will not be damaged by lack of phase, unstable vol-tage, current leakage and overload;
●The pump shall be installed on the base horizontally. Horizontal direction is the inlet for the pump, and ve-rtical direction isthe outlet forthe pump;
●The flange connection dimension are in conformity with the related provisions PN16 in GB/T 17241.6 orISO7005-2/DIN 2501.
Curves
Following conditions are suitable for the performance curves shown bellow:
1. Curve tolerance is in conformity with ISO9906 Annex A:
2. All curves are based on the measured value of motor 3x380V, 50Hz: under the constant speed of2900rpm or 2950rpm: 60Hz:under the constant speed of 3450rpm or 3500rpm;
3, The test medium is clear 20°C water without any solid impurity:
4, Pumps should not work if the flow is beyond the minimum or the maximum flow in the curves:5. The motor power shall be adjusted if the viscosity or density of medium is different from water.
Section Drawing
Operating condition
Clean, thin, non-flammable and explosivnot containing the liquid with solid particland fibe;
Liquid temperature:-20°C ~+100°C:Ambient temperature: up to +40°C;Altitude: up to 1000m;Max. pressure of the system is 10 bar.
Material
| NO. | Parts | Material | AISI/ASTM |
| 1 | Motor | ||
| 2 | Pump head | HT200 | ASTM25B |
| 3 | Guard plate | 0Cr18Ni9 | AISI304 |
| 4 | Shaft | 2Cr13/0Cr18Ni9 | AISI420/AISI304 |
| 5 | Oring | NBR | |
| 6 | Lining of pump head | 0Cr18Ni9 | AISI304 |
| 7 | Mechanical seal | Carbon/Silicon Carbide | |
| 8 | Impeller | 0Cr18Ni9 | AISI304 |
| 9 | Casing | 0Cr18Ni9 | AISI304 |
| 10 | Base plate | Q235 | ASTMA570 |
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