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| Hunan Province, P.R.C |
MDS Double-suction Self-balancing Multistage Pump for Mining
Classification:
BB4 Self-balancing Multistage Pump
Multi-stage pump for mine
MDS280-65x8P first-stage double-suction mine self-balancing multistage pump
MDS280-65x8P first-stage double-suction mine self-balancing multistage pump
Key words:
water pump
Head Range: 50~2000m
Operating 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: MDS Double-suction Self-balancing Multistage Pump for Mining
Flow Range: 3.75~1100 m3/h<br>Head Range: 50~2000m<br>Operating 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><br>
Product Description
MDSP first-stage double-suction mining self-balancing multistage pump, the first-stage impeller adopts double-suction design, which can effectively reduce the cavitation of the water pump. Due to the absence of wear and axial pulsation of the balance disc, the alignment of the impeller and the guide vane is always in a neutral state, and the efficiency will not decrease with the wear of the balance disc and the forward movement of rotor components like the common multistage pump structure. There is no balance water leakage and volume loss, on the whole, the operation efficiency and service life of the pump are improved, and the efficiency is 5-14% higher than that of the ordinary multi-stage pump.
Model Description:
MDSP -- First-stage double-suction self-balancing multistage pump for Mining Service;
280 -- Design point flow is 280 m3/h;
65 -- The head of single-stage design point is 65m;
8 -- Number of pump stages.
Rotation Direction:
Clockwise when viewing from the motor driving end toward the pump.
Material of Main Parts:
All pump wetted parts are available in wear-resistant ductile iron, cast steel and stainless steel grades including 304, 316, 316L, 2205, 2507, etc.
Supply Scope of Complete Set:
The package includes pump, motor and base frame; either common shared base or independent pump base is optional. The manufacturer also supplies auxiliary fittings (discharge reducer, gate valve, foot valve, check valve) and spare parts (impeller, wear ring, diffuser sleeve, balance disc, shaft sleeve).
Structure Description:
Type D, DG, MD, DF and DY consist of four core assemblies: stationary casing parts, rotor assembly, bearing assembly and shaft seal assembly.
1. Stationary Parts
Composed of suction casing, middle casing, discharge casing and diffusers; all sections are fastened together by through bolts to form pump working chambers.
D type: Horizontal suction nozzle, vertically upward discharge nozzle
DG type: Both suction and discharge nozzles point vertically upward
MD, DF, DY type: Standard horizontal suction, vertical discharge; vertical suction & discharge configuration is available upon special request.
2. Rotor Assembly
Mainly includes pump shaft, impellers, balance disc and shaft sleeves. The shaft transmits torque to drive impeller operation; balance disc counteracts axial thrust; replaceable shaft sleeves are fitted onto the shaft for shaft protection.
3. Bearing Assembly
Consists of bearing housing, rolling/sliding bearings and bearing gland.Types 85-67, 155-67, 600-60 adopt sleeve bearings with oil bath lubrication; rolling bearing design is optional for 85-67 and 155-67.All other models use rolling bearings with grease lubrication.
4. Shaft Seal
Standard configuration is soft packing seal, composed of stuffing box on suction casing and end cover, packing rings and water slinger. Pressurized sealing water is fed into stuffing box for water sealing, cooling and lubrication.
D type: Sealing water sourced from internal high-pressure pump medium
DG, MD, DF, DY type: Sealing water from internal process medium or external service water supply; mechanical seal is widely selected as alternative for these four series.
5. Drive Arrangement
The pump is directly driven by prime mover via flexible coupling. Rotation is clockwise viewed from the prime mover end.
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Flow Range: 3.75~1100 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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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 |
