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| Email: | info@sanchangpump.net |
| Hotline： | +86 181 4266 2779 |
| +86 193 1300 1794 | |
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+86 181 4266 2779 |
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+86 181 4266 2779 |
| Address： | No.517,Xiangfu Road |
| Yuhua District, | |
| Changsha City | |
| Hunan Province, P.R.C |
DY Type Multistage Centrifugal Oil Pump
Classification:
BB4 Multistage Centrifugal Pump
Petrochemical industry
Electric power industry
Product Catagory
BB2 Pump
DY type multistage oil pump
Key words:
water pump
Hotline:
- Product Description
- Performance Parameter
- Installation Drawings
- Installation And Use
- Faults And Solutions
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- Commodity name: DY Type Multistage Centrifugal Oil Pump
Flow Range: 3.75~1400 m3/h</br> Head Range: 50~1800m</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>
DY type oil pump is horizontal single‑suction sectional multistage centrifugal pump featuring prominent advantages of high efficiency, low running noise, excellent anti‑cavitation performance, compact rational structure and long service life. It is applicable for hot water, oil products, corrosive and abrasive media as well as oil & petroleum products free of solid particles with viscosity below 120 cSt. The product is designed in accordance with industry standard JB/T1051‑93 Types and Basic Parameters of Multistage Centrifugal Pumps.
Adopting nationally promoted high-efficiency energy-saving hydraulic models, DY horizontal single‑suction sectional multistage centrifugal pumps hold leading technical position in the industry with high efficiency, wide performance coverage, safe & stable operation, low noise, long service life and easy installation & maintenance.
Structure Description
This pump features single-casing, single-suction, horizontal sectional construction with horizontal suction nozzle and vertically upward discharge nozzle. Details are as follows:
2.1 Stationary Assembly
Front casing, middle casing, diffuser, rear casing, bearing bracket and balance chamber cover are fastened into a whole via through tie bolts and nuts; both sides of front and rear casings are bolted onto pump base.
2.2 Rotor Assembly
Impeller, impeller spacer, balance sleeve spacer, balance disc and shaft sleeve are locked onto the main shaft with round nuts and positioned by flat keys for anti‑rotation. The full rotor is supported by bearings on both ends and coupled directly to motor via elastic pin coupling.
A tooth-shaped gasket is fitted between final-stage part and balance spacer for thermal expansion compensation; replace this gasket during every overhaul.
2.3 Balance Mechanism
Hydraulic balance disc assembly fully and automatically balances axial thrust, consisting of balance seat, balance disc, balance sleeve and balance spacer.
Model Description
Example: DY46-50 × 4
DY —— Multistage Centrifugal Oil Pump
46 —— Design rated flow: 46 m³/h
50 —— Single-stage design head: 50 m
4 —— Total number of pump stages
Example: 100D16 × 3
100 —— Suction nozzle diameter: 100 mm
D —— Multistage clean water centrifugal pump
16 —— Single-stage design head: 16 m
3 —— Total number of pump stages
Application
For particle-free oil and petroleum products with working temperature ranging from −20℃ to 105℃ and viscosity less than 120 cSt.
Hunan Sanchang Pump Industry Co., Ltd. provides customized manufacturing service for DY series oil pumps. Inquiry is welcome.
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Performance range:
Flow Range: 3.75~1400 m3/h
Head Range: 50~1800m
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 DY Type Multistage Centrifugal Oil Pump
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Pre-installation Preparation
1. Determine the installation location of the multi-stage pump: the location where the installation is stable and easy to operate, repair and overhaul should be selected.
2. Confirm the location of the water injection port: the water injection port should be set at the inlet pressure pipe and about 20cm away from the pump to avoid backflow and change the impeller speed of the multi-stage pump.
3. Deal with the inlet pressure pipeline: prepare the pipeline and flange connection part to ensure that the connection part is free of foreign matter or rust.
4. Prepare the power supply and cables: select the appropriate cable according to the power requirements of the multi-stage pump, and ensure that the cable quality is good.
Installation Procedures
1. Assemble the components: Assemble the components according to the requirements of the instructions or drawings, and determine the positions of the drain, vent, and lubrication parts.
2. Install the multi-stage pump: place the multi-stage pump in the installation position, pay attention to the smooth contact between the base of the multi-stage pump and the ground, and the seat surface of the base is perpendicular to the ground.
3. Interface connection: connect the inlet pressure pipe and the outlet pressure pipe. The connecting flange shall be parallel and horizontal without distortion and deformation.
4. cable wiring: according to the multi-stage pump electrical connection diagram wiring, pay attention to the standardization of wiring and reasonable wiring.
5. Water injection and drainage: open the stop valve of the inlet pressure pipe of the multi-stage pump, and introduce clean water (or including the added pump irrigation and drainage liquid) into the pump to avoid abnormal noise caused by pump vibration.
6. Adjust the pump: adjust the frequency converter or on-demand reducer to ensure that the motor of the multi-stage pump works normally and the water flow speed is moderate.
Post-installation Inspection
1. Check the overall installation of the pump: to ensure that the base of the multi-stage pump is stable and vertical.
2. Check the connection of each pipeline: confirm whether each interface is tightly connected and whether there are abnormal conditions such as abnormal noise.
3. Pump movement test: turn on the power, check whether the motor rotation is stable, whether the sound is normal, whether the pump is leaking, etc.
4. System pressure test: In the experiment, the intelligent instrument records data such as the opening and closing state of the control valve and the water flow. During the test, pay attention to whether there are abnormal conditions such as noise, vibration or high temperature around the system, and deal with any abnormalities in time.
5. Check the wires: Confirm whether the wires are correctly wired and free of damage and other relevant details meet the installation specifications.
The above is a detailed explanation of the installation steps of the multi-stage pump. I hope readers can install the multi-stage pump correctly according to the above steps to ensure that the installed multi-stage pump can operate normally and provide better protection for production and life.
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Fault one: multi-stage pump does not absorb water pressure gauge and vacuum gauge pointer beating violently
Cause: 1. Insufficient water injection and diversion 2. Air leakage at the connection between pipeline and instrument 3. Excessive suction
Solution: 1. Check whether the bottom valve leaks. 3. Lower the suction height
Fault two: multi-stage pump does not absorb water vacuum table indicates a high degree of vacuum
Reason: 1. The bottom valve is not opened or blocked 2. The resistance of the suction pipeline is too large 3. The filter is blocked
Solution: 1. Check the bottom valve 2. Replace the water absorption 3. Clean the filter
Fault three: pressure gauge pressure but still not out of water
Reason: 1. The resistance of the outlet pipe is too large 2. The rotation direction is wrong 3. The outlet pipe valve is not open 4. The impeller is blocked
Solution: 1. Check or short water pipe 2. Check the motor. Two-phase intermodulation 3. Open the outlet valve 4. Remove the dirt in the impeller
Fault four: can not reach the design flow
Reason: 1. air inhalation 2. due to the lowering of the water level. The submerged depth is not enough. 3. The impeller is blocked by foreign matter. 4. The rotor is severely worn.
Solution: 1. Check the air leakage site and exclude 2. Extend the suction pipe. Deepen the flooding depth 3. Remove and remove foreign objects 4. Replace the sealing ring
Fault five: multi-stage pump power consumption is too large
Reason: 1. Packing is too tight. And heat 2. The flow is too large 3. The rotating body and the shell rub 4. The pump bearing is worn 5. The pump shaft is bent.
Solution: 1. Relax the packing pressure appropriately 2. Close the gate valve opening 3. Trim the position of the rotary body and the shell 4. Replace the bearing 5. Replace or correct
Fault six: multi-stage pump vibration increased
Reason: 1. The impeller is partially blocked 2. The impeller is damaged 3. The flow rate is too small 4. The pump shaft is not concentric with the motor 5. The bearing is damaged 6. Air is mixed. Cavitation occurs
Solution: 1. Disassemble and remove foreign matter 2. Replace the impeller 3. Slightly open the outlet valve 4. Point aligning 5. Change the suction position. Improved water absorption
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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 |
