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Pumps D-TYPE

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Type D pumps are horizontal, single-stage pumps with a double-suction impeller.

Type D double-suction centrifugal pumps are classified as general-purpose pumps.

Type D pumps and pump units based on them are designed for pumping cold, clean, non-aggressive water or liquids with similar physical and chemical properties.

The main characteristics of type D pumps, depending on the modification, are:

  • flow rate – from 70 m³/h to 6,300 m³/h;
  • head – from 14 m to 125 m;
  • efficiency – from 64% to 90%;
  • electric motor power (equivalent) – from 11 kW to 2,000 kW;
  • pump weight – from 145 kg to 8,170 kg;
  • assembled unit weight – from 325 kg to 18,170 kg.
Pump designation* Flow rate, m3/h Head, m Rotational speed, rpm Permissible cavitation margin, m Pump efficiency, % Electric motor power, kW Pump weight, kg Unit weight, kg
D 2000-21-2 980 2000 21 5 90 160 1685 3050
730 1600 11 3 90 90 2930
D 2000-21а-2 980 1850 19 5 88 132 3010
730 1500 10 3 88 55 2710
D 2000-21б-2 980 1700 16 5 86 110 2770
730 1400 9 2 86 55 2710
D 2000-100-2 980 2000 100 6 82 800 2470 5410
D 2000-100а-2 1900 88 6 79 630 5080
D 2000-100б-2 1800 80 6 77 630 2460 5070
D 2500-62-2 980 2500 62 6 88,5 630 2700 5930
730 2000 34 4 88,5 250 5305
D 2500-62а-2 980 2300 52 6 86,5 500 2690 5620
730 1900 29 4 86,5 250 5295
D 3200-33-2 980 3200 33 6,5 90 400 2700 5250
730 2500 17 4 90 160 4410
D 3200-33а-2 980 3000 29 6,5 88 315 5100
730 2400 15 4 88 132 4310
D 3200-33б-2 980 2800 25 6,5 86 315 5100
730 2300 13 4 86 110 4140
D 3200-75-2 980 3200 75 6,5 88,5 1000 3650 8930
730 2500 42 4 88,5 400 6860
D 3200-75а-2 980 3000 65 6,5 86,5 800 3640 7250
730 2300 35 4 86,5 400 6850
D 4000-95-2 980 4000 95 7 88,5 1600 4660 12050
730 3200 50 5,5 88,5 630 8570
D 4000-95а-2 980 3700 82 7 86,5 1250 4650 11090
730 3000 45 5,5 86,5 630 8560
D 6300-27-3 730 6300 27 7,5 90 630 4600 8430
585 5000 17 5 90 315 7810
D 6300-27а-3 730 5800 24 7,5 88 500 8150
585 4620 15 5 88 250 7580
D 6300-27б-3 730 5450 22 7,5 86 400 7900
585 4350 14 5 86 200 7380
D 6300-27-3-1 730 5000 32 7,5 90 630 4600 8430
585 4000 20 5 90 315 7780
D 6300-80-2 730 6300 80 6,5 88,5 2000 8170 18170
585 5000 50 5,5 88,5 1000 15290
D 6300-80а-2 730 5900 70 6,5 86,5 1600 8160 16660
585 4700 45 5,5 86,5 800 14270
D 6300-80б-2 730 5500 60 6,5 84,5 1250 8150 15470
585 4400 38 5,5 84,5 630 13650
D 160-112м 2900 160 122 4,2 73 110 200 1055
1450 90 30 4,2 73 18,5 510
D 160-112 2900 160 112 4,2 73 90 880
1450 80 28 4,2 73 15 460
D 160-112а 2900 140 100 4 72 75 850
1450 75 25 4 72 15 470
D 160-112б 2900 135 80 4 71 55 695
1450 70 21 4 71 11 455
D 200-36 1450 200 36 4,3 76 45 240 585
D 200-36а 1450 190 30 4,2 71 30 560
D 200-36б 1450 180 25 4,2 64 22 535
D 320-50 1450 320 50 4,5 80 75 300 955
D 320-50а 1450 300 39 4,1 74 55 805
D 320-50б 1450 300 30 4,1 68 45 745
D 200-90-1 2900 200 90 5,5 75 90 145 770
1450 100 22,5 5,3 75 15 365
D 200-90а-1 2900 180 74 4,9 74 75 740
1450 90 19 5,2 74 15 365
D 200-90б-1 2900 160 62 4,8 73 55 605
1450 80 16 5,2 73 11 325
D 250-125-1 2900 250 125 6 76 160 165 1290
1450 125 30 5,5 76 22 490
D 250-125а-1 2900 240 110 5,6 75 132 1080
1450 120 27,5 5,2 75 18,5 460
D 250-125б-1 2900 220 90 5,3 73 110 1000
1450 110 22 4,8 73 15 445
D 315-50-1 2900 315 50 6,5 82 75 190 790
D 315-50а-1 2900 300 42 6,1 76 55 650
D 315-50б-1 2900 220 36 5,4 72 45 555
D 315-71-1 2900 315 71 6,5 82 110 190 1045
1450 160 18 6,3 80 18,5 500
D 315-71а-1 2900 300 62 6,2 81 90 820
1450 150 17 5,8 79 15 490
D 315-71б-1 2900 280 52 5,9 81 75 835
1450 130 14 5,4 79 11 445
D 500-63-1 1450 500 63 4,5 80 160 450 1850
980 340 28 4,3 78 45 1225
D 500-63а-1 1450 450 53 4,3 76 132 1080
980 300 24 4,1 76 37 560
D 500-63б-1 1450 400 44 4,2 75 90 1310
980 270 20 4 75 30 585
D 630-90-1 1450 630 90 5,5 82 315 525 2150
980 500 38 5 80 110 1775
D 630-90а-1 1450 550 74 5,2 75 200 1945
980 470 30 4,4 75 75 1510
D 630-90б-1 1450 500 60 5,1 74,5 160 1905
980 420 25 4 74,5 55 1200
D 630-125-1 1450 630 125 5,5 75 400 797 2500
980 500 54 5,3 73 110 2080
D 630-125а-1 1450 550 101 5,3 73 315 2395
980 450 45 5 72 90 2025
D 630-125б-1 1450 500 82 5,1 72 250 2080
980 420 38 4,9 71 75 1910
D 800-56-1 1450 800 56 5 84 200 560 1970
980 540 28 4,8 82 55 1310
D 800-56а-1 1450 740 48 4,5 81 132 1715
980 500 22 4,7 82 45 1290
D 800-56б-1 1450 700 40 4,3 80 110 1565
980 470 19 4,6 80 37 1105
D 1250-63-1 1450 1250 63 5,5 86 315 800 2485
980 800 28 5,3 85 110 2045
D 1250-63а-1 1450 1100 52,5 5 84 250 2070
980 740 24 5 84 75 1940
D 1250-63б-1 1450 1050 44 4,9 83,5 200 2235
980 710 20 4,9 83 55 1465
D 1250-125-1 1450 1250 125 5,5 82 630 1515 4830
980 800 56 5,3 80 200 3170
D 1250-125а-1 1450 1150 102 5,2 81 500 4540
980 750 48 5,2 80 160 3020
D 1250-125б-1 1450 1030 87 5,1 80 400 3875
980 700 40 5,1 79,5 132 2940
D 1600-90-1 1450 1600 90 7 86 630 1165 4830
980 1000 40 5 85 160 2470
D 1600-90а-1 1450 1450 75 6,2 85 500 4225
980 970 34 4,9 85 132 2395
D 1600-90б-1 1450 1300 63 5,6 84 315 3785
980 870 30 4,8 84 110 2495

*Pump designation: D – double-suction pump; 2000 – flow rate in m3/h; 21 – head, in m; a – impeller trimming; 2 – serial number of modernization.

DOUBLE-SUCTION CENTRIFUGAL PUMPS (TYPE D)
SPECIAL RELIABILITY REQUIREMENTS FOR TYPE D PUMPS
MAIN DESIGN REQUIREMENTS FOR TYPE D PUMPS
APPLICATION AREAS OF TYPE D PUMPS
DESIGN CONFIGURATION OF TYPE D PUMPS
MODERNIZATION MEASURES FOR TYPE D PUMPS

All manufactured Type D pumps can be grouped into a single category, as they share many common design features and engineering solutions, with only minor differences in the design of individual components.

The modernization and improvement of Type D pump designs are aimed at increasing efficiency, energy performance, and reliability, as well as reducing energy consumption and material intensity.

The main areas of improvement include:

  • optimization of the hydraulic flow path;
  • increased erosion resistance of wetted parts;
  • improvement of bearing assemblies and other components;
  • application of mechanical seals;
  • reduction of noise and vibration levels;
  • extension of pump service life;
  • increase of maintenance intervals;
  • improvement of vibration performance.

The application scope and operating conditions of Type D pumps have defined the key requirements for their design:

  • ensuring high reliability and extended service life (average time between major overhauls of at least 30,000–45,000 hours);
  • ensuring external tightness (leak-proof performance);
  • a stable, continuously decreasing head curve within the flow range from 20% to 110% of nominal capacity, ensuring stable parallel operation within a common system.

The operating range of Type D pumps can be expanded by trimming the impeller outer diameter by no more than 10% of its original value. In this case, the efficiency reduction should not exceed 3%. The range can also be adjusted by changing the rotational speed.

In addition, the reliability and energy efficiency of Type D pump operation are directly influenced by:

  • correct selection of the pump according to required system parameters;
  • consideration of operating conditions and integration into the process system;
  • precision and quality of manufacturing;
  • qualified installation and proper operation.

Compliance with these requirements can improve equipment reliability and efficiency by 15–20%, which is a significant indicator and a critical factor for the performance of the entire pumping unit.

  • high reliability and cost-effectiveness;
  • extended operating range achieved by impeller trimming and variable rotational speed;
  • long service life;
  • dynamic stability across the entire operating range;
  • stable, continuously decreasing head curve to ensure reliable operation in parallel configurations;
  • proper selection of materials for key components to ensure required service life under operating conditions;
  • selection of an appropriate type of shaft sealing;
  • a high degree of standardization;
  • ease of assembly, disassembly, maintenance, and high serviceability in operation.

Type D pumps and pump units based on them are designed for pumping water and water-like liquids with similar viscosity and chemical properties, at temperatures up to 85–95 °C, containing solid particles not exceeding 0.05% by mass, with a maximum particle size of 0.2 mm and microhardness not exceeding 6.5 MPa (650 kgf/mm²). They are suitable for use in various industries, agriculture, heating systems, municipal water supply, and other applications.

DESIGN AND STRUCTURAL FEATURES OF TYPE D PUMPS AND TYPE AD ELECTRIC PUMP UNITS BASED ON THEM

Let us consider the design of a Type AD pump unit. It should include the following main components:

  • Type D pump assembled with auxiliary piping within the pump. Pump parameters are selected according to the required system specifications.
  • Drive. Type D pumps are powered by either an asynchronous or synchronous electric motor.
  • Pump supports. Provided according to the customer’s requirements and contract.
  • Frame. Can be a single or separate frame depending on the pump size. Supplied according to the customer’s requirements and contract.
  • Coupling. Pumps are equipped with a flexible sleeve-and-pin coupling of the MUVP type.
  • Coupling guard.
  • Automation and instrumentation (I&C). Each pump unit is equipped with an automation and instrumentation system that monitors critical operational parameters, provides automatic control during start and stop modes, and automatically shuts down the unit in case of unacceptable deviations of process parameters.

Type D Pumps – Design and Features

Type D pumps are centrifugal, horizontally oriented, volute-type, with a horizontal split casing, single-stage, and equipped with a double-suction impeller. At the lower part of the pump casing, there are support feet, as well as suction and discharge nozzles directed in opposite directions, perpendicular to the pump axis. This arrangement of the nozzles and the horizontal casing split allows for assembly, disassembly, and maintenance of the pump without disconnecting the piping or removing the electric motor. Axial thrust is compensated by the double-suction impeller. The rotor is supported by external rolling or sliding bearings, depending on the power rating. Bearings are lubricated with either grease (consistency lubricant) or liquid ring (sump) lubrication using lubrication rings. Shaft sealing is provided by mechanical seals or gland packing, with supply of cooling and sealing liquid.

Special Design Considerations for Type D Pumps

Type D pumps are designed to operate reliably in automatic mode without constant operator presence and to ensure dependable performance when integrated into a common network.

Drive Type for Type D Pumps

Type D pumps are driven by asynchronous or synchronous electric motors with nominal rotational speeds of 600, 750, 1000, 1500, or 3000 rpm (synchronous).

  • Implementation of a new high-efficiency hydraulic section with increased pump efficiency;
  • Use of higher-grade materials and coatings for the pump’s hydraulic components to improve erosion resistance;
  • Application of a specially designed blade diffuser at the impeller outlet to eliminate radial forces across the entire flow range;
  • Use of SKF rolling bearings with high precision and low friction torque, allowing operation at high rotational speeds with low noise, wear, heat generation, and energy consumption;
  • Implementation of mechanical seals;
  • Use of a flexible disc coupling between the motor and the pump to improve vibration characteristics and increase the reliability of the pump unit.

The goal of modernization is to enhance the reliability, efficiency, and operational safety of the pump.

BUY TYPE D PUMPS FROM MANUFACTURER CHT SLOVAKIA S.R.O.

To order a specific unit or receive consultation for pump selection, you can contact our sales department by phone listed on the website or submit a request via the feedback form. We deliver our products to all CIS countries (except Russia and Belarus) as well as European countries.

CHT Slovakia s.r.o. is a leading manufacturer and supplier of industrial pumps, offering high-quality equipment for various industries. Our Type D pumps are reliable horizontal, single-stage centrifugal pumps with a double-suction impeller. They belong to the general-purpose pump category and are designed for pumping cold, clean, non-aggressive water or liquids with similar physical and chemical properties, at temperatures up to 85–95 °C, containing solid particles not exceeding 0.05% by mass, with a maximum particle size of 0.2 mm and microhardness not exceeding 6.5 MPa (650 kgf/mm²). These pumps are widely used in industry, agriculture, heating systems, and municipal water supply networks.

FEATURES OF TYPE D PUMPS

Type D pumps feature a volute design with a horizontal split casing, and suction and discharge nozzles directed in opposite directions, perpendicular to the pump axis. Assembly, disassembly, and maintenance can be performed without disconnecting the piping or removing the electric motor. Axial thrust is compensated by the double-suction impeller.

Key Features:

  • Support parts and seals: The rotor is supported by rolling or sliding bearings, depending on the power rating. Bearings are lubricated with either grease (consistency lubricant) or liquid ring (sump) lubrication. Shaft sealing is provided by mechanical seals with gland packing, with supply of cooling and sealing liquid.
  • Modernization: Hydraulic sections are improved to increase efficiency, erosion resistance of components, and bearing design; mechanical seals are applied; noise and vibration are reduced; service life is extended (average time between major overhauls is 30,000–45,000 hours); maintenance intervals and vibration performance are improved.
  • Additional elements: A Type AD pump unit includes the pump, a drive (asynchronous or synchronous electric motor), pump supports, frame (single or separate), flexible sleeve-and-pin coupling of the MUVP type, coupling guard, and an automation and instrumentation system for monitoring operational parameters, automatic control, and shutdown in case of deviations.
  • Reliability: High reliability, external tightness, and a stable head curve (continuously decreasing over the flow range of 20–110% of nominal) ensure stable parallel operation. Use of high-efficiency hydraulic sections, erosion-resistant materials, blade diffusers to eliminate radial forces, SKF bearings, mechanical seals, and flexible disc couplings reduce vibration and increase reliability.

Advantages of Our Pumps:

  • High reliability and cost-effectiveness.
  • Extended operating range through impeller trimming (no more than 10% of diameter, efficiency reduction ≤3%) and variable speed.
  • Long service life (30,000–45,000 hours before major overhaul).
  • Dynamic stability across the full operating range.
  • Stable head curve for parallel operation.
  • Proper selection of materials to ensure operational life.
  • Appropriate type of shaft sealing.
  • High degree of standardization.
  • Ease of assembly, disassembly, maintenance, and serviceability.
  • Increased reliability and efficiency by 15–20% with proper selection and operation.

Technical Specifications (general, depending on modification):

  • Flow rate: 70–6,300 m³/h
  • Head: 14–125 m
  • Efficiency: 64–90%
  • Motor power: 11–2,000 kW
  • Pump weight: 145–8,170 kg
  • Unit weight: 325–18,170 kg
  • Rotational speed: 600, 750, 980, 1450, 2900, 3000 rpm (synchronous)
  • Allowable NPSH: 2–7.5 m

RANGE OF TYPE D PUMP MODELS

On our page, we present a wide range of Type D pump models, each adapted to specific requirements. The main subcategories are:

  • D 1250-125-1: Flow 1250 m³/h, Head 125 m, Efficiency 82%, Power 630 kW
  • D 2000-21-2: Flow 2000 m³/h, Head 21 m, Efficiency 90%, Power 160 kW
  • D 2000-100-2: Flow 2000 m³/h, Head 100 m, Efficiency 82%, Power 800 kW
  • D 2500-62-2: Flow 2500 m³/h, Head 62 m, Efficiency 88.5%, Power 630 kW
  • D 3200-33-2: Flow 3200 m³/h, Head 33 m, Efficiency 90%, Power 400 kW
  • D 3200-75-2: Flow 3200 m³/h, Head 75 m, Efficiency 88.5%, Power 1000 kW
  • D 4000-95-2: Flow 4000 m³/h, Head 95 m, Efficiency 88.5%, Power 1600 kW
  • D 6300-27-3: Flow 6300 m³/h, Head 27 m, Efficiency 90%, Power 630 kW
  • D 6300-27-3-1: Flow 6300 m³/h, Head 27 m (modified), Efficiency 90%, Power 630 kW
  • D 6300-80-2: Flow 6300 m³/h, Head 80 m, Efficiency 88.5%, Power 2000 kW

Detailed technical specifications for each model are available in the corresponding subcategories.

HOW TO CHOOSE A TYPE D PUMP

The proper selection of a Type D pump depends on your system parameters, operating conditions, and process layout. We recommend considering:

  • Required flow rate (m³/h) and head (m)
  • Temperature and properties of the pumped fluid
  • NPSH (Net Positive Suction Head) and rotational speed
  • Installation and operating conditions (e.g., presence of solid particles)

For precise selection, consult our specialists — they will perform calculations and recommend the optimal model, which can improve efficiency by 15–20%. You can also use the online calculators or the consultation form on our website for an initial assessment.

ORDERING PROCESS FOR TYPE D PUMPS

Ordering Type D pumps from CHT Slovakia s.r.o. is a simple and transparent process:

  1. Consultation: Contact us by phone or via the website form to select the right model.
  2. Calculation: Our engineers provide technical calculations and a commercial proposal.
  3. Agreement: Discuss details such as delivery, payment, and modifications.
  4. Processing: Sign the contract and make the prepayment.
  5. Production and Delivery: Manufacturing time is 4–8 weeks, with delivery across Europe and CIS countries (except Russia and Belarus).

We guarantee full support from consultation to installation.

HOW TO BUY A TYPE D PUMP

Purchasing a Type D pump from our company is convenient and advantageous:

  • Online: Select a model on the website, add it to the cart, and place your order.
  • By phone: Call our sales department for a personalized offer.
  • Via form: Submit a request with your specifications and receive a response within 24 hours.
  • Delivery: Free delivery in Europe for large orders; fast logistics to Ukraine and neighboring countries.
  • Payment: Flexible terms — prepayment, letter of credit, or postpayment.

Manufacturer Address: Röntgenova 3751/28, Bratislava, 85101, Slovak Republic

Consultations: +421940231416 (SK, RU); +421918974521 (EN, RU)

Order today to ensure reliable water supply for your business!

FREQUENTLY ASKED QUESTIONS ABOUT TYPE D PUMPS

When selecting a pump, the following factors are taken into account: flow rate, head, temperature and composition of the fluid, NPSH (Net Positive Suction Head), installation conditions, and operating mode. Engineers at CHT Slovakia s.r.o. perform hydraulic calculations and select the optimal model to improve the efficiency of the pumping station by 15–20%.

Yes, CHT Slovakia s.r.o. performs pump modernization according to customer requirements: optimization of the hydraulic section, use of wear-resistant materials, installation of mechanical seals, reinforced bearing assemblies, reduction of noise and vibration, and complete integration with automation and instrumentation & control (I&C) systems.

These pumps feature high efficiency of up to 90%, a service life of up to 45,000 hours, vibration resistance, and a stable head curve suitable for parallel operation. They are easy to maintain without disconnecting the piping and use SKF bearings and mechanical seals. This ensures reliable and cost-effective operation.

Type D pumps are widely used in the energy sector, heating systems, water utilities, industry, metallurgy, mechanical engineering, agriculture, and municipal services. They are employed in pumping stations, thermal power plants (TPPs), trunk pipelines, and water supply systems.

Type D pumps are designed for pumping cold, clean, non-aggressive water, as well as liquids with similar physical and chemical properties. The allowable fluid temperature is up to 85–95 °C, with a solid particle content of no more than 0.05% by mass and a maximum particle size of 0.2 mm. These pumps are intended for long-term continuous operation in industrial systems.