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| 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 |
DYP Self-balancing Multistage Centrifugal Oil Pump
Classification:
DYP self-balancing multistage oil pump
Petrochemical industry
DYP self-balancing multistage oil pump
Key words:
water 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: DYP Self-balancing Multistage Centrifugal Oil Pump
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
DYP type self-balancing multistage oil pump is designed to deliver oil and petroleum products free of solid particles, with medium temperature below 80℃ and viscosity less than 120 cSt.Available construction materials for DYP pump include HT200, QT600, 304, 304L, 316L, 317L, 904L and CD4,etc.
Overview
DYP Type Self-balancing Multistage Oil Pump is an advanced high-efficiency and energy-saving multistage centrifugal pump with long service life developed to meet customers’ requirements. It adopts internationally proven high-efficiency hydraulic models, abandons the conventional balancing structure of traditional multistage pumps and promotes the technical advancement of high-pressure multistage pumps. Designed and manufactured in accordance with API610 standard, the pump holds a leading technical position in the industry. It features wide high-efficiency operating range, broad performance envelope, excellent anti-cavitation property, safe and stable running, low noise, fewer wearing parts as well as convenient installation and maintenance.
Structure Description
The DYP self-balancing multistage oil pump features innovative structural upgrades by eliminating the conventional axial thrust balancing mechanism and balance disc assembly used on traditional multistage centrifugal pumps, serving as an upgraded replacement for D and DY series multistage centrifugal pumps.
Without a balancing device, the pump avoids disc friction loss of balance discs and backflow loss of balancing fluid. Its hydraulic efficiency is improved by 5%~14% compared with equivalent conventional multistage pumps. The elimination of balance disc friction reduces shaft power consumption and delivers notable energy savings, cutting operating power consumption by approximately 3% versus similar pump models.
Furthermore, the design completely eliminates common failures induced by failed balancing components, such as excessive wear of balance disc/balance ring and rotor seizure. Service life is significantly extended; its mean trouble-free operating time exceeds three times that of ordinary multistage pumps, lowering users’ maintenance expense and overall life-cycle cost of the equipment.
Application
It transports oil and petroleum products free of solid particles at temperatures below 80℃ and viscosity below 120 cSt, and is widely applied to high-pressure and long-distance fluid delivery conditions in chemical, cement, steel, mining, agriculture, municipal engineering and other industries.
Model Description
For example:
DY46 - 50 X 8P
DYP-horizontal self-balancing single-suction multi-stage centrifugal oil pump
46 - design flow rate is 46m ³/h
50 - Single-stage design head is 50m.
8 - number of pump stages is 8
Performance advantages
1. High Efficiency & Energy Saving: The self-balancing multistage pump adopts advanced independently developed high-efficiency energy-saving hydraulic models. Free from balance disc abrasion and axial pulsation on the rotor, the impellers remain perfectly concentric with diffusers at all times. Unlike conventional multistage pumps whose efficiency drops sharply as balance discs wear and rotor assemblies shift forward, this design eliminates balancing medium leakage to cut volumetric loss. Overall operational efficiency rises and shaft power consumption reduces, delivering an average efficiency improvement of 2%~3% over standard multistage pumps.
2. Innovative Structure: Impeller assemblies are arranged symmetrically. Axial thrust generated by opposing impellers counteracts mutually, automatically offsetting substantial internal axial force without conventional balance disc assemblies, realizing a breakthrough against traditional multistage pump structural design.
3. Advanced Technical Design: Equipped with exclusive throttling and pressure-reducing components plus odd-stage balancing structure which additionally functions as an auxiliary support.
4. Superior Operational Reliability: Symmetric impeller layout achieves nearly complete self-compensation of axial thrust. The high-risk balance disc assembly featuring narrow clearance, high pressure drop and susceptibility to erosion, abrasion and breakdown is omitted, minimizing component wear and system disturbance caused by axial load.
5. Excellent Anti-cavitation Performance & Extended Service Life: Optimized hydraulic and structural design, precision casting and high-quality wear-resistant materials are applied. Certain models adopt double-suction first-stage impellers for outstanding cavitation resistance, enabling stable low-noise operation and prolonged service life.
6. Enhanced Mechanical Seal Reliability: Zero axial endplay during pump startup/shutdown and no operational axial pulsation solves the long-standing poor sealing reliability issue commonly found on conventional multistage pumps.
7. Wide Application Range: Removal of narrow-clearance balance discs enables stable operation under harsher medium conditions compared with traditional multistage pumps.
8. Low Maintenance Cost: Precision casting reduces the quantity of wearing parts and disassembly frequency, extending equipment lifespan and avoiding faults from repeated overhaul, thus cutting overall maintenance expenditure.
9. Easy Maintenance: Designed via 3D modeling with CNC-machined rotors for strict dimensional accuracy and precise positioning. Ordinary technicians can complete assembly following assembly drawing instructions, eliminating the need for specialized professionals to adjust axial float as required for old-style multistage pumps and bringing great convenience to end users.
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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 DYP Self-balancing Multistage Centrifugal Oil Pump
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Installation Instructions for DYP Self-balancing Multistage Centrifugal Oil Pump
Pre-installation Preparation
1. Confirm pump installation location: Select a solid mounting site convenient for operation, routine maintenance and overhaul.
2. Confirm filling port position: Install the filling port on the suction pipeline around 20 cm away from the pump to prevent backflow-induced fluctuation of impeller rotating speed.
3. Prepare suction pipeline: Inspect pipes and flange joints to ensure no foreign debris or rust on connecting surfaces.
4. Prepare power supply and cables: Select matching cables complying with the pump’s electrical requirements and verify good cable quality.
Installation Procedures
1. Component assembly: Assemble all parts per manual or drawing specifications and confirm positions of drain port, vent port and lubrication components.
2. Pump positioning: Place the pump on the designated spot with its base fully and evenly supported, base mounting surface perpendicular to the ground.
3. Pipeline connection: Connect suction and discharge pipelines; flanges shall be kept parallel and horizontal without twist or deformation.
4. Electrical wiring: Wire strictly in accordance with the pump wiring diagram with standardized and neatly routed cables.
5. Priming filling: Open the shut-off valve on the suction pipeline and fill clean water (or specified priming liquid) into the pump to avoid abnormal noise caused by pump vibration.
6. Pump commissioning: Adjust frequency converter or reduction unit as required to guarantee stable motor operation and proper medium flow rate.
Post-installation Inspection
1. Overall pump check: Verify the pump base is level and vertically mounted.
2. Pipeline joint inspection: Check tightness of all connections and eliminate abnormal noise or defects.
3. No-load running test: Switch on power to inspect smooth motor rotation, normal operating sound and zero liquid leakage of the pump.
4. System pressure test: Record opening/closing status of control valves and flow data via intelligent instruments during testing. Monitor abnormal noise, excessive vibration or overheating around the system and troubleshoot promptly if any fault occurs.
5. Cable inspection: Confirm correct wiring and intact cable condition in line with installation codes.
Follow the above steps for proper pump installation to guarantee reliable operation and stable service for industrial and domestic applications.
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Common Faults & Troubleshooting of DYP Self-balancing Multistage Centrifugal Oil Pump
Fault 1: Pump fails to draw fluid; violent needle fluctuation on pressure gauge and vacuum gauge
Causes
1. Insufficient priming liquid filled
2. Air leakage at pipeline and instrument connections
3. Excessive suction lift
Solutions
1. Check foot valve for leakage and refill enough priming liquid
2. Fasten leaking joints
3. Reduce suction lift height
Fault 2: No liquid suction; vacuum gauge shows ultrahigh vacuum reading
Causes
1. Foot valve closed or clogged
2. Excessive resistance on suction piping
3. Strainer blocked
Solutions
1. Inspect foot valve
2. Modify or replace suction pipeline
3. Clean up the strainer
Fault 3: Pressure gauge shows pressure but no discharge from pump outlet
Causes
1. Excessive discharge pipe resistance
2. Wrong motor rotation direction
3. Discharge valve remains closed
4. Impeller blocked by debris
Solutions
1. Inspect or shorten discharge piping
2. Check motor and swap any two power phases
3. Open outlet valve fully
4. Clear contaminants inside impeller
Fault 4: Actual flow lower than design flow rate
Causes
1. Air ingress into pump casing
2. Reduced liquid level leads to insufficient submergence depth
3. Foreign matter stuck inside impeller
4. Severe abrasion on rotating assembly
Solutions
1. Locate and eliminate air leakage points
2. Extend suction pipe to increase submergence depth
3. Dismantle pump and remove blockages
4. Replace wear rings
Fault 5: Excessive power consumption of pump
Causes
1. Over-tightened packing causes overheating
2. Overload flow rate
3. Rubbing between rotating parts and pump casing
4. Worn pump bearing
5. Bent pump shaft
Solutions
1. Loosen packing gland appropriately
2. Throttle gate valve to reduce flow
3. Realign rotating components and casing
4. Replace defective bearing
5. Straighten or replace bent pump shaft
Fault 6: Abnormally high pump vibration
Causes
1. Partial blockage on impeller
2. Damaged impeller
3. Too small operating flow
4. Misalignment between pump shaft and motor shaft
5. Failed bearing
6. Air entrainment resulting in cavitation
Solutions
1. Disassemble pump and remove obstructions
2. Install new impeller
3. Slightly open discharge valve to raise flow
4. Perform precision alignment of pump and motor
5. Optimize suction layout to improve suction condition
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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 |
