D 1250-125-1 FROM CHT SLOVAKIA S.R.O.
APPLICATION OF THE D 1250-125-1 PUMP
The D 1250-125-1 pump belongs to the general-purpose pump group and is designed for pumping water and liquids with water-like viscosity and chemical properties, at temperatures up to 95 °C, containing solid particles not exceeding 0.05% by mass, with a maximum particle size of 0.2 mm, and microhardness no greater than 6.5 MPa (650 kgf/mm²). It is suitable for use in various industries, agriculture, heating systems, municipal water supply, and more.
TECHNICAL SPECIFICATIONS
Nominal parameters of the D 1250-125-1 pump and its variations depend on the impeller outer diameter and rotational speed.
This is a key parameter to consider when designing the external network (pipeline and valve system) and selecting pump equipment.
Dimensions and weight of the D 1250-125-1 pump and its variations depend on the impeller outer diameter and rotational speed.
Asynchronous three-phase squirrel-cage electric motors are used to drive the D 1250-125-1 pump and its variations. The overall efficiency of the system ranges from 76% to 78%.
MAIN REQUIREMENTS FOR THE D 1250-125-1 PUMP DESIGN
- High reliability and cost-effectiveness
- Extended operating range through impeller trimming and variable speed
- Long service life — mean time before major overhaul at least 30,000 hours (with proper maintenance)
- Dynamic stability across the full operating range
- Stable, continuously decreasing head curve for parallel operation
- Proper selection of materials for main components to ensure operational life
- High degree of standardization
- Ease of assembly, disassembly, maintenance, and high serviceability
CONSTRUCTION FEATURES OF THE D 1250-125-1 PUMP
- Horizontal design ensures high vibration resistance, reduces shaft misalignment, and increases component lifespan
- Volute type with horizontal casing split through the pump axis, ensuring high maintainability, easy servicing, and simple operation; suction and discharge nozzles located at the bottom allow assembly and disassembly without disconnecting pipes
- Single-stage pump with double-suction impeller
- Pump casing is a complex cast iron structure in two parts (upper – pump cover, lower – pump body) with integrated semi-spiral inlet and spiral outlet channels; inlet and discharge nozzles, support feet, and leak collection brackets are cast in the lower part
- Rotor is a separate assembly including shaft, impeller, guide sleeves, protective sleeves, gland bushings, seal rings, bearing housings, bearings, fastening parts, and half-coupling
- Double-suction impeller unloads the rotor from axial forces and improves cavitation performance
- Rotor supported by external rolling bearings (drive side: single-row ball bearing; opposite side: two single-row angular contact ball bearings) with grease lubrication and air cooling
- Gland-type shaft seals with hydraulic seal fluid supply
- Torque transmitted from motor to pump via flexible sleeve-and-pin coupling
MATERIALS OF THE D 1250-125-1 PUMP
High-quality materials ensure reliability, durability, and efficiency.
- Pump casing, impeller, guide sleeves, sealing rings, seal covers, and gland bushings – cast iron СЧ200
- Pump shaft – carbon steel 45
- Protective sleeves – carbon steel 45 with heat treatment
- Bearing housings – carbon steel 20
ADDITIONAL SUPPLY OPTIONS
- High-grade materials and coatings for improved erosion resistance
- Optimized hydraulic design to reduce maintenance and extend service life
- Mechanical seal to reduce leakage and increase efficiency; API 682 compliant seal chamber for compatibility with various manufacturers
- Bearing supports with sensor locations for temperature and vibration monitoring
- SKF rolling bearings with high precision, low friction, and low noise
- Flexible disc coupling to improve vibration characteristics and reliability
- VDS monitoring system with vibration, speed, and temperature sensors for predictive maintenance
HOW TO BUY D 1250-125-1 PUMPS FROM CHT SLOVAKIA S.R.O.
To order a specific unit or receive consultation, contact our sales department by phone or submit a request via the website form. We deliver to all CIS countries (except Russia and Belarus) and European countries.
