The condensate pump belongs to a special group of power pumps, operating under deep vacuum and minimal geometric suction conditions, intended for supplying condensate from exhaust steam of stationary steam turbines, heating steam condensate from heat exchangers of TPPs and NPPs, as well as clean water with temperatures up to 125 °C in heat and water supply systems, metallurgy.
Technical Characteristics
Nominal parameters of the pump:
- Flow: 500 m³/h
- Head: 85 m
- Allowable cavitation margin: 1.6 m
- Efficiency: 77 %
- Temperature: 10–125 °C
- Rotation speed: 985 rpm
This parameter is important when designing the external network (piping and fittings) and selecting pump equipment.
Dimensions and Weight
- Pump weight: 3130 kg
- Unit weight: 4450 kg
- Pump dimensions (W × L × H): 1500 × 1475 × 2265 mm
- Unit dimensions (W × L × H): 1500 × 1475 × 3425 mm
The pump is driven by an asynchronous motor with a squirrel-cage rotor, 200 kW. Overall efficiency of the system: 73 %.
Design Features
- Vertical design provides maximum installation suction and favorable cavitation conditions.
- Two-casing construction allows assembly and disassembly without disconnecting pipelines. One external sealing joint.
- First stage is screw-centrifugal with a single-entry impeller.
- Outer casing: welded construction consisting of suction and discharge parts with welded support legs and suction/discharge nozzles.
- Inner casing: includes rotor, mechanical seal, thrust relief unit, upper and lower bearing supports, covers, guide apparatus, inlet casing, lantern.
- Upper bearing: double radial-thrust ball bearing, cartridge lubrication, water cooling.
- Lower bearing: sleeve bearing lubricated with pumped condensate filtered through a mesh. Handles only radial loads.
- Rotor thrust is relieved by a thrust drum between the last-stage impeller and relief chamber, balancing axial force and reducing pressure on the seal.
- Mechanical seal: gland type with hydroseal ring, cooled with pressurized condensate.
Materials
- Outer casing: carbon steel
- Main parts (covers, sections, sealing rings, bearing casing): cast iron СЧ200
- Seal casing: steel 25L
- Shaft: thermally strengthened steel 40Х
- First-stage impeller, impellers, guide apparatus, thrust drum: stainless steel 20Х13
Additional Supply Options
- Mechanical seal reduces leakage and improves energy efficiency.
- Use of alloyed and stainless steel for flow parts to increase erosion resistance; carbon steel for sections, covers, bearing casing to increase service life.
- Optimization of impeller blades and guide channels to improve vibration characteristics and stage efficiency.
- Upgraded upper and lower bearings to increase service life.
- Hydrocyclone for cleaning fluid supplied to the lower sleeve bearing, increasing its life.
- VDS monitoring system: vibration, rotation, and temperature sensors for real-time pump condition monitoring.
Manufacturer: CHT Slovakia s.r.o.
To order a pump or request selection advice, contact the sales department via the website or phone. Delivery is available to all CIS countries (except Russia and Belarus) and European countries.
