Jiangsu Du'an Environmental Protection Sludge Recirculation PumpKey Components Materials
Duwan Submersible Recirculation Pump
QJB-W12/12 Submersible Recirculation Pump
Internal Recirculation Pump QJB-W15/12


Wall Penetrating Pump Component Material Description:
Impeller | AISI 304 |
Axle | AISI 304 |
Guide ring with coupling claw and bracket | AISI 304 |
Mechanical Seal | Tungsten carbide or Silicon carbide |
Chain/Wire rope | AISI 304 |
Guide rod, bracket | AISI 304 |
Mobile hoists and lifting equipment | AISI 304 |
All connected accessories/Anchoring Bolt | AISI304 |
Wall Penetration Pipes, Export Short Tubes, and Flanges | AISI 304 |
Pilot valve body | AISI 304 |
Pilot valve plate | AISI 304 |
Door hinge pin | AISI 420 |
Motor Power: 12 kW
All-Copper Winding Motor
304 Stainless Steel Material
Rod 100*100*3mm
Mounting brackets, hand winch, wire rope, expansion bolts, etc.


Duwan Environmental QJB-W15/12Submersible Recirculation Pumps, Immersed Recirculation PumpsMatching on-siteControlControl cabinet:
Duwan Environmental ProtectionSubmersible recirculation pump, complete with submerged recirculation pump equipment control cabinet and on-site pushbutton box (one control, one box).
Field control box byJiangsu Du'an Environmental ProtectionSupplied with, control box featuring a see-through double door, made of stainless steel304Material: Stainless steel is also used for the bracket.304Material, can be securely fastened; board thickness not less than1.5mmOutdoor protection grade:IP55Indoor protection rating not less thanIP4XThe interior of the box is equipped with protective switches, control switches, and logic components. The panel features a multi-functional meter, conversion switches, start/stop buttons, and an emergency stop button, as well as running indicator lights. In the event of a device failure, it can halt the operation of the equipment.
Duwan Environmental ProtectionBased on the performance requirements of the provided equipment and the aforementioned control requirements,ManufacturingProvide a complete electrical control diagram for each control box, including wiring diagrams, general layout of electrical components, specific wiring diagram numbering, and a list of electrical component configurations.
Be required to haveCircuit breakers, AC contactors, thermal overload relays (if required), variable-frequency drives (if required), etc., primary components and operational functions, mainly electrical components (circuit breakers, contactors, thermal overload relays) using Schneider,ABBOr Siemens products.
304Stainless Steel On-SiteControl the remaining space in the cabinetPLCConnectors for system wiring are clearly labeled, and complete control drawings are provided for implementation.PLCAutomatic control.
Duwan Environmental ProtectionQJB-WSludge Recirculation PumpAfter-Sales Service Promise:
1Responsible for the free guidance on installation, debugging, and operation of the equipment ordered by the customer until it runs smoothly.;
2Free basic operation and daily maintenance training services are provided at the installation site for customers.;
3From the date of equipment acceptance, provide warranty services for the equipment of this project in accordance with the original manufacturer's warranty terms.;
4Free upgrade from standard manufacturer's warranty service to on-site warranty service;
5、Equipment Lifetime Maintenance and Warranty ExtensionOut-of-warranty equipment will be charged for defective parts only at cost, excluding labor fees.;
6Service response time:4-8HourMainlandUser48Reach the fault site within an hour, other usersNext1 business day to reach the fault site;



































