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| Email: | info@sanchangpump.net |
| Hotline： | +86 181 4266 2779 |
| +86 193 1300 1794 | |
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| Address： | No.517,Xiangfu Road |
| Yuhua District, | |
| Changsha City | |
| Hunan Province, P.R.C |
DFP Type Self-balancing Multistage Brine Pump for Salt Mining
Classification:
Seawater desalination pump
Salt mining brine pump
Self-balancing salt mining brine pump
Mining industry
Salinization industry
DFP corrosion-resistant self-balancing multistage pump
Key words:
BB4 Self-balancing Multistage Pump
Salt Mining Pump
Brine Pump
Head Range: 50~2000m
Medium Temperature: 0 ℃ ~ 80 ℃
Allowable Inlet Pressure: 0.6MPa
Shaft Seal: packing seal, mechanical seal
Available Materials: HT200, HT250, QT600, ZG, 304, 316, 316L, 317L, 904L, CD4-MCu, etc
Hotline:
- Product Description
- Performance Parameter
- Installation Drawings
- Installation And Use
- Faults And Solutions
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- Commodity name: DFP Type Self-balancing Multistage Brine Pump for Salt Mining
Flow Range: 3.75~1400 m3/h<br>Head Range: 50~2000m<br>Medium Temperature: 0 ℃ ~ 80 ℃<br>Allowable Inlet Pressure: 0.6MPa<br>Shaft Seal: packing seal, mechanical seal<br>Available Materials: HT200, HT250, QT600, ZG, 304, 316, 316L, 317L, 904L, CD4-MCu, etc</br></br></br></br></br>
Product Description
This pump is applied for water injection in brine wells of brine mining & transportation systems. Its wetted medium is salt-making wastewater containing dissolved salts including NaCl, Na₂SO₄ and CaSO₄. The medium is normally at ambient temperature, with maximum working temperature ≤50°C.
Product Overview
DFP type self-balancing corrosion-resistant multistage brine pump features outstanding corrosion resistance for corrosive medium transportation. Developed and manufactured in compliance with API610 standards, this stainless steel self-balancing multistage pump adopts symmetric rotor self-balancing construction, delivering better running stability and energy efficiency than conventional sectional multistage pumps. It boasts wide high-efficiency operating range, broad performance envelope, excellent anti-cavitation performance, safe & smooth operation, low noise, fewer wearing parts as well as easy installation and maintenance.
Structure Description
With no balancing assembly fitted, the DFP brine pump eliminates both disc friction loss of balance disc and backflow loss of balancing medium. Its hydraulic efficiency is 5%~14% higher than similar conventional multistage pumps. The removal of balance disc friction reduces shaft power consumption and saves around 3% of running power compared with equivalent multistage pumps. Besides, it fundamentally eliminates typical failures such as balance disc/ring abrasion and rotor seizure caused by failed balancing devices, greatly extending pump service life. Its trouble-free service life exceeds three times that of standard pumps, cutting end-users’ maintenance cost and overall life-cycle cost.
Application
For conveying solid-free corrosive liquids at temperature ranging from −20℃ to 105℃.
Model Explanation
DF（P）46 - 50 X 8
DF(P) - Horizontal self-balancing single-suction stainless steel multistage centrifugal pump
46 - Design flow rate is 46m ³/h
50 - Single-stage design head is 50m.
8 - Number of pump stages is 8
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Flow Range: 3.75~1400 m3/h
Head Range: 50~2000m
Medium Temperature: 0 ℃ ~ 80 ℃
Allowable Inlet Pressure: 0.6MPa
Shaft Seal: packing seal, mechanical seal
Available Materials: HT200, HT250, QT600, ZG, 304, 316, 316L, 317L, 904L, CD4-MCu, etc
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Outline Installation Drawing of DFP Self-balancing Corrosion-resistant Multistage Brine Pump
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Installation, Start-up, Operation & Shutdown Instructions for DFP Self-balancing Corrosion-resistant Multistage Brine Pump
Besides complying with general standard installation specifications, extra precautions shall be followed during DFP pump installation as below:
1. When assembling pump and motor, pull out the pump shaft at coupling end and reserve an end clearance of 2~3 mm to secure required axial gap between pump coupling and motor coupling.
Note: Perform foundation grouting only after base plate is leveled with satisfactory horizontal precision. Correct coupling alignment is critical for successful installation; flexible couplings cannot compensate for obvious misalignment. Misalignment leads to accelerated component wear, abnormal noise, vibration and equipment damage, hence coupling alignment must be kept within specified tolerance limits. Effectively support suction and discharge pipelines to avoid excessive piping load acting on pump nozzles.
2. The centerlines of pump shaft and motor shaft shall be collinear on the same horizontal plane.
3. The self-balancing horizontal multistage pump can only bear its own internal forces; no external loads are permitted on pump casing or nozzles.
Start-up
WARNING: Never operate beyond the parameters marked on pump nameplate to avoid equipment failure and personal injury. Carry out all operation and maintenance strictly per operation manual.
1. Bar the rotor manually before startup to check free rotation without jamming.
2. Verify motor rotation direction matches pump specified rotation.
3. Close discharge gate valve and pressure gauge cock; vent air inside pump casing and piping with conveyed medium or vacuum pumping system. Dry running is strictly prohibited.
4. Check tightness of connecting bolts between pump and motor and surrounding safety condition to get ready for startup.
5. Start the motor; after stable pump operation, open pressure gauge cock and gradually open discharge gate valve, regulating pump rated head according to discharge pressure gauge reading.
Operation
1. Axial thrust is offset by internal self-balancing structure; balancing fluid drains out via balance piping back to pump suction casing.
2. All rolling bearings are equipped with cooling circuits; connect cooling water piping completely before commissioning. Bearing temperature rise shall not exceed 35℃ above ambient temperature, and maximum bearing operating temperature shall not surpass 75℃.
Note: Improper lubrication will result in bearing overheating, fracture, pump locked rotor, equipment breakdown and potential bodily harm to operators.
3. Minor axial float of rotor is inherent during operation; always maintain designed clearance between two coupling end faces of pump and motor.
4. Periodically inspect wear condition of impeller, wear ring, diffuser sleeve, balance disc and shaft sleeve during service; replace components promptly when excessive abrasion occurs.
5. Formulate detailed site-specific operation procedures based on actual working conditions.
Shutdown
Close pressure gauge cock first, then slowly shut down discharge gate valve; cut off motor power only after the discharge valve is fully closed.
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Fails to start or excessive starting load
Causes: Disconnected power supply, faulty motor, loose/damaged impeller or defective control circuit board.
Solutions: Check power wiring; replace faulty motor, impeller or circuit board as needed.
Insufficient or zero flow rate
Causes: Worn or blocked impeller/diffuser, clogged/worn wear ring, insufficient motor rotating speed.
Solutions: Replace impeller or diffuser, clear blockages, renew wear ring, inspect motor and adjust rotating speed properly.
Low or zero pump head
Causes: Worn/blocked impeller and diffuser, inadequate motor speed, air leakage on pipeline.
Solutions: Replace blocked or worn impeller/diffuser, clear obstructions, inspect and adjust motor speed, repair leaking pipeline joints.
Excessive vibration and abnormal noise
Causes: Bent pump shaft, damaged bearing, unbalanced impeller, clogged pipeline.
Solutions: Straighten pump shaft, replace defective bearing, perform dynamic balancing on impeller, clean pipeline blockages.
Overheating pump
Causes: Damaged bearing, insufficient lubrication, bent pump shaft.
Solutions: Replace bearings, replenish lubricant, straighten deformed pump shaft.
Liquid leakage from pump
Causes: Worn/broken wear ring, loose/leaky pipeline connections.
Solutions: Install new wear ring, repair leaking pipeline connections.
When troubleshooting the horizontal self-balancing multistage pump, identify root causes first before implementing corresponding remedies. If the above measures cannot eliminate faults, contact professional maintenance technicians. Regular inspection and routine maintenance are required to guarantee stable operation and extended service life, enabling early detection and elimination of potential hidden failures.
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Hunan Sanchang Pump Co., Ltd.
| Email: | info@sanchangpump.net |
| Hotline: | +86 181 4266 2779 |
| +86 193 1300 1794 | |
| Mobile/Wechat/WhatsApp: | +86 181 4266 2779 |
| Address: | No.517,Xiangfu Road, Yuhua |
| District, Changsha City | |
| Hunan Province, P.R.C |
