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Mauritania MDP Wear-resistant Self-balancing Multistage Pump for Mining
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
Category:
Product Description
MDP type self-balancing horizontal multistage centrifugal pump is developed in compliance with API610 standards. It integrates advanced technologies of equivalent overseas products with our company’s decades of R&D experience and adopts high-efficiency hydraulic models recommended by national energy-saving policies to meet diversified market demands and boost technical advancement of high-pressure multistage pumps.Featuring a wide high-efficiency operating range, broad performance coverage and superior NPSH performance, the pump comes with fewer wearing parts and allows easy installation and maintenance. Its operational reliability is greatly enhanced, with trouble-free service life over three times that of conventional multistage pumps, cutting end-users’ maintenance and full-lifecycle costs significantly.
Breaking the structural design of traditional segmental multistage pumps, this high-pressure self-balancing pump eliminates the conventional axial thrust balancing assembly, serving as an ideal replacement for D/DG series pumps fitted with balancing disc or balancing drum structures. Without built-in balancing devices, energy losses from disc friction and balance return flow are eliminated, lifting overall pump efficiency by 5%~14% versus ordinary equivalent multistage pumps. It fundamentally avoids common failures such as balancing disc/seating abrasion and rotor seizure triggered by failed balancing assemblies, greatly extending pump service life. Field operation records over years verify its performance reaches the advanced level of international peer products.
Model Description:
Example: MD280J‑43×8(P)
MD(P) -- High-efficiency energy-saving self-balancing heavy abrasion-resistant multistage pump
280 -- Design flow rate: 280 m³/h
J -- Mechanical seal (no J marking stands for packing seal)
43 -- Single-stage design head: 43 m
8 -- Total impeller stage number: 8 stages
Working Principle:
Driven by an electric motor, the pump shaft rotates and imparts mechanical energy to conveyed fluid. Liquid is continuously drawn from the suction tank, sequentially passing through suction casing, forward impellers, forward diffusers, middle casings, horizontal outlet of discharge casing, transition pipes, secondary suction section, reverse impellers, reverse diffusers and vertical outlet of final discharge casing before being delivered out continuously.
Structural Features:
MDP self-balancing multistage pump is a horizontally split segmental multistage centrifugal pump with single or double suction inlet. Its suction port can be configured vertically upward or horizontally, while the discharge port is arranged vertically upward. Main components include suction casing, middle casings, discharge casing, secondary suction section, forward/reverse diffusers, forward/reverse impellers, pump shaft, throttling & pressure relief assembly, shaft sleeve, bearing housing and transition pipes.
Middle casings are clamped together with suction and discharge casings via high-tensile stay bolts. Metal-to-metal hard sealing coated with molybdenum disulfide grease is applied on all mating sealing surfaces among suction, middle and discharge casings. The rotor assembly consists of forward impellers, throttling pressure relief parts, reverse impellers and shaft sleeves mounted on the main shaft. Bearings adopt fixed-floating grease lubrication configuration: drive end fitted with cylindrical roller bearings and non-drive end with angular contact ball bearings. The pump hydraulic chamber is composed of suction casing, middle casings, discharge casing, secondary suction section, diffusers and transition pipes.
Wear rings and diffuser sleeves are installed between rotating rotor and stationary pump casing for sealing; these consumables shall be replaced promptly once excessive wear deteriorates pump hydraulic performance.
Two shaft sealing options are available: mechanical seal and packing seal. For packing-sealed configuration, packing rings must be correctly positioned with appropriately tightened packing; optimal tightness allows intermittent droplet leakage. All sealing elements are installed inside the seal chamber, which is fed with pressurized service water for water sealing, cooling and lubrication. Replaceable shaft sleeves are equipped at stuffing box to protect the main shaft. Bearing and seal replacement can be completed without detaching pump suction/discharge piping. The pump is directly coupled to prime mover via elastic pin coupling or diaphragm coupling; the pump rotates clockwise when viewed from the drive end of the motor.
Conveying Medium Range:
Applicable for clean water or chemically similar liquids with solid particle content ≤1.5%, maximum particle size ≤1.3 mm and medium temperature ≤105 ℃. By customizing pump material, sealing structure and adding auxiliary cooling system, the pump can also handle hot water up to 225 ℃, oil products, corrosive fluids or abrasive slurry. Available casing materials include HT200 cast iron, QT600 ductile iron, cast steel ZG, stainless steel 304,304L,316L,317L,904L and duplex stainless steel CD4 etc. for customer selection.
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 |
