PRODUCTS CENTER
Iraq DP Type Horizontal Self-balancing Multistage Centrifugal 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
Category:
Product Description
Developed by our company based on imported advanced technologies after digestion and absorption, D(P) type self-balancing multistage pump features high efficiency, superior anti-cavitation performance as well as stable and reliable operation. It is applicable for coal mines, mineral mines, factories and other sites to convey neutral mine water and similar sewage with solid particle content ≤1.5% (particle size below 0.5 mm) and medium temperature ≤40℃.
Model Description
Example: D280J-43X8(P);
D(P): High-efficiency energy-saving self-balancing multistage pump;
280: Design rated flow (m3/h);
J: Mechanical seal (not marked as packing seal);
43: Single-stage design head (m);
8: Number of pump stages.
Structure and Working Principle of Main Components
1. Main Components
Parts include front suction casing, discharge casing, rear suction casing, diffuser, right diffuser, left/right diffuser for discharge section, middle casing, impeller, opposed impeller, pump shaft, balance drum, front/rear positioning sleeve, adapter bracket and reverse flow channel.
The rotor assembly consists of shaft-mounted impellers, opposed impellers, balance drum, impeller spacer and front/rear positioning sleeves. The drive end is supported by a cylindrical roller bearing, while the non-drive end is equipped with a pair of face-to-face mounted angular contact ball bearings with grease lubrication.
2. Pump Hydraulic Chamber
Formed jointly by front suction casing, rear suction casing, middle casing, diffuser, right diffuser, left/right discharge diffuser, reverse flow channel and discharge casing. Liquid enters axially from one side; axial thrust produced by each pair of symmetrically fitted impellers counteracts mutually for automatic axial force balance. Low-pressure stages are arranged on both ends to reduce pressure load on shaft seals.
3. Sealing & Auxiliary Parts
① Shaft Seal: Standard soft packing seal; packing tightness shall be properly adjusted to permit intermittent droplet leakage.
② Drive Configuration: Direct-driven by electric motor via flexible coupling; pump rotates clockwise when viewed from motor side.
③ Bearing Arrangement: Cylindrical roller bearing at drive end, paired angular contact ball bearings at non-drive end.
④ Wear Ring: Prevents high-pressure medium from leaking back to suction side and is replaceable after abrasion.
⑤ Balance Drum: Installed behind final-stage impeller and rotates with rotor; radial clearance is formed between outer drum surface and inner bore of balance sleeve.
⑥ Front & Rear Positioning Sleeves: Installed beside two stuffing boxes and replaceable upon wear.
4. Working Principle
Driven by the motor, the pump shaft rotates to apply work on conveyed liquid and boost medium energy. The liquid is delivered from suction sump through pump wetted components to designated height or required pressure.
Product Features
1. Trouble-free operation and long overhaul interval. Unique axial thrust balance design plus fixed-floating bearing positioning structure eliminates mechanical friction and collision during service, extending maintenance cycle.
2. High hydraulic efficiency and outstanding energy-saving effect. Advanced sealing structure drastically reduces leakage loss and improves overall pump efficiency.
3. Innovative construction with upgraded technology. Symmetric impeller layout breaks conventional pump structural limits; exclusive throttling & pressure-reducing device and balance structure suit harsh medium conditions.
4. Excellent anti-cavitation property and long service life. Double-suction first-stage impeller delivers superior cavitation resistance for smooth, low-noise running and prolonged service lifespan.
5. Low maintenance cost. Elimination of failure-prone wear-intensive balance disc greatly cuts maintenance expense; upgraded materials and craftsmanship further enhance operational stability and service life.
Structural Description
D(P) series is horizontal self-balancing centrifugal pump with horizontal suction port on suction casing and vertically upward discharge port on discharge casing. Suction casing, middle casings, discharge casing and secondary suction casing are fastened integrally by through tie bolts; pump head can be adjusted by increasing or reducing stage quantity.
1. Main spare parts: suction casing, suction end cover, suction baffle, middle casing, discharge casing, secondary suction casing, diffuser, final-stage diffuser, return diffuser, final-stage return diffuser, impeller, opposed impeller, pump shaft, throttling pressure-reducing unit, spacer sleeve and bearing housing.
2. Hydraulic chamber composed of suction casing, middle casing, discharge casing, secondary suction casing, diffuser, return diffuser and transition pipe.
3. Rotor set includes pump shaft, impeller, opposed impeller, throttling pressure-reducing assembly, bearing spacer and shaft sleeve. Shaft transmits torque to drive impellers. Bearings adopt fixed-floating dry grease lubrication layout: cylindrical roller bearing on drive end, paired angular contact ball bearings on non-drive end.
4. Shaft seal adopts packing seal composed of stuffing box body, packing and packing ring fitted on suction casing. Medium inside stuffing box realizes sealing, cooling and lubrication; sealing water is supplied by internal pumped clean water or external pressurized service water. Replaceable shaft sleeves are installed on both shaft ends to protect pump shaft from abrasion.
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 |
