1. Basic specification model analysis:
IS: International standard single-stage single- suction centrifugal pump
125: Inlet diameter 125mm (DN125)
80: Outlet diameter 80mm (DN80)
200A: Impeller nominal diameter 200mm (A indicates the first cutting of the impeller)
Type: Horizontal axial suction centrifugal pump
Standard: GB/T5657 (equivalent to ISO2858)
2. Performance parameters
| paramètre | Indicator range |
| Flow(Q) | 60-120m³/h |
| Head (H) | 40-55m |
| rated speed | 2900r/min (2-pole motor) |
| efficiency | 68-72% |
| Required NPSH | 3.0-4.0m |
3.Structural design
Pump body material:
Standard: HT200 cast iron
Optional: 304 stainless steel(corrosive environment)
Impeller:
Closed structure (dynamic balance G6.3 level)
Material:cast iron/bronze (optional)
Shaft seal:
Standard: packing seal (graphite impregnation)
Upgrade: single end mechanical seal (standard flushing port)
4.Power configuration
Matching motor:
Power: 18.5-30kW (selected according to working conditions)
Protection level: IP54/IP55
Insulation class: Class B/Class F
Transmission mode: Direct coupling (elastic pin type)
5. Installation parameters
| Item | Dimensions (mm) |
| Center height | 250 |
| Inlet and outle flange | GB/T9113 PN16 |
| Foot spacing | 500×400 |
| Total length | ≈850 |
6. Operation limit
medium temperature: ≤80℃(high temperature type can reach 120℃)
Working pressure: ≤1.0MPa
Solid content: ≤0.1% (clean water standard)
7.Selection and expansion
Special configuration:
Variable frequency motor (energy-saving adjustment)
Full set of stainless steel materials (food/ pharmaceutical grade)
Explosion-proof motor (Ex dⅡ BT4)
Typical application scenarios
1. Building water supply system
2. Fire water supply
3. Industrial circulating water
4. Air conditioning cooling water system
(Note: The actual selection needs to check the pipeline characteristic curve, and it is recommended to reserve 10% flow margin)
