Product Applications
- Secondary side circulating water systems in central heating systems
- Chilled water and cooling water circulation systems in central air
- conditioning systems
High - efficiency and Energy - saving
The Dongfang DFJN intelligent high - efficiency circulating unit is
composed of high - efficiency single - stage pumps in a combination
of large, medium and small sizes, multifunctional filters, flow
monitoring systems, plate heat exchangers (for central heating
applications), intelligent control systems, complete sets of
accessories, etc. It uses a frequency converter from a joint -
venture brand. Through a programmable logic controller (PLC), it
conducts variable - frequency speed regulation on multiple pumps
with different flow rates and combines pumps of different sizes,
achieving remarkable energy - saving effects.01 High - efficiency Water Pump- A combination of large, medium, and small high - efficiency water
pumps offers a wide high - efficiency range. The unit can
automatically activate one or multiple pumps based on the system's
flow requirements. With a wide high - efficiency range, it always
operates within the high - efficiency zone, making the system more
energy - efficient.
- It features a high - efficiency hydraulic model and is optimized
using CFD (Computational Fluid Dynamics) design.
02 Low - resistance Pipe Valves- Full - bore non - slamming low - resistance check valve.
- Adopting laser - cut materials, with precise dimensions. The valve
port has a smooth surface for low resistance.
- Full - bore straight - through flange butterfly valve.
03 One - to - One Frequency ConversionEach water pump is equipped with a dedicated frequency converter,
which can operate according to parameters such as outlet pressure,
differential pressure, temperature, and flow rate. The terminal can
transmit data to adjust the outlet pressure in real - time. While
ensuring the stable operation of the frequency converter, it also
enables timely adjustment for users. With the one - to - one dedicated frequency converter, the
frequency converter can operate according to actual needs to
accurately adjust the flow and pressure, which can effectively
solve the problem of excessive flow and low user occupancy rate,
saving the occupied space. The control cabinet is a special control device for the chilled
water system. It can collect power grid parameters, operating
status, and fault information. The equipment can automatically
operate in the high - voltage area. It has the advantages of stable
operation and can promptly respond to user needs and handle fault
information. Additionally, a redundant control unit can be added to
enhance the reliability of the entire chilled water system.
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High Reliability
Anti - corrosion impellers, multifunctional filters, imported
components, one - time - formed 01 High - standard Hardware- Coating thickness measurement ensures the equipment is corrosion -
resistant and has a long lifespan.
- The equipped inverters feature a high protection level (IP55), are
dust - proof, have thickened PCB coatings, and exhibit high
reliability.
- Equipped with imported brand components.
- Equipped with imported brand programmable logic controllers.
02 Multifunctional Filters and Corrosion - resistant Pipelines- Pump sets, bases, low - resistance pipe valves, and control
cabinets are pre - fabricated in the factory and assembled
modularly. Overall testing is completed before leaving the factory
to ensure the overall performance of the products.
- The 304 - stainless - steel pipelines undergo pickling,
passivation, and electrolytic polishing treatments to offset the
impact of welding on the pipelines and enhance their corrosion -
resistance.
- Multifunctional filters with functions like scale removal,
filtration, and back - flushing, along with low - resistance pipe
valves, effectively ensure the stable and efficient operation of
the system.
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High Integration Degree
The equipment adopts an electromechanical integrated design.
Components are modularly integrated on a common base and undergo
overall debugging before leaving the factory. There is no need for
on - site fabrication, which saves installation time and reduces
installation costs. The equipment can be put into operation once it
is powered on and supplied with water on - site, reducing
installation and debugging costs.01 Electromechanical Integrated Design
The unit features an electromechanical integrated design. The pump
set and the frequency converter are mounted in a back - hung
manner, and the control cabinet is much smaller in size. It is more
compact than traditional units, occupying less floor space.02 Integration of Various Functional Configurations
For central heating applications, a plate heat exchanger can also
be integrated. |
