The CDL/CDLF Series Vertical Multistage Centrifugal Pump is a non-self-priming sectional multistage centrifugal pump featuring a direct-coupled motor with tie-rod fastened pressure-resistant casing and coaxial inlet/outlet configuration, enabling compact in-line pipeline installation.
Resolves four critical operational risks: inability to deploy conventional multistage pumps in space-constrained layouts, motor damage from dry running/phase loss/overload, complex maintenance disassembly, and lack of integrated system protection.
Suitable for building secondary boosting, industrial pure water transfer, municipal circulation systems, and HVAC applications requiring high head, low flow, coaxial in-line installation, and intelligent motor protection.
Extended Service Life: Tungsten carbide mechanical seals + 304/316 stainless steel wetted parts resist wear, corrosion & cavitation. Design lifespan ≥12 years—over 35% longer than standard cast-iron multi-stage pumps.
Significant Energy Savings: CFD-optimized hydraulic model + resin-sand precision cast impellers improve rated efficiency by 15%+. Combined with VFD on-demand regulation, annual electricity costs drop by 20%–30%.
Lower Maintenance Costs: Back-pull-out structure + drain/pressure ports enables seal/bearing inspection without disconnecting inlet/outlet piping. Single technician completes maintenance within 45 minutes, reducing labor costs by 50%.
Lightweight & Compact Design: Motor-pump direct coupling + tie-rod pressure cylinder eliminates heavy baseplate & coupling guard. Overall weight reduced by ~20% for equivalent power ratings, lowering floor load requirements.
Faster Installation: Coaxial inlet/outlet arrangement + pre-aligned flanges with horizontal suction/vertical discharge adapts to multiple piping schemes. Standard units reach commissioning readiness within 2 hours from unboxing, compressing installation cycle by 40%.
Building Water Boosting: Domestic water supply for high-rise/super high-rise buildings, fire pressure stabilization, hotel hot water circulation, residential secondary water supply.
Industrial Process Water: Process pure water transport, cooling water circulation, boiler feedwater, RO high-pressure supply for electronics/pharmaceutical/food/chemical industries.
Municipal & Water Treatment: Waterworks boosting, sewage lifting station, reclaimed water reuse systems, seawater desalination pretreatment.
HVAC & Energy Systems: Central AC chilled/cooling water circulation, district heating networks, solar hot water system boosting.
Media Compatibility: Thin, clean, non-flammable/explosive liquids, free of solids or fibers. CDL suits non-corrosive media; CDLF suits mildly corrosive conditions.
 | NO. | Component | Material | AISI/ASTM |
| 1 | Electric Motor | Assembly | ||
| 3 | Motor Bracket | Cast Iron/Ductile Iron | ||
| 4 | Mechanical Seal | Assembly | ||
| 5 | Discharge Guide Vane | Stainless Steel | AISI304 | |
| 6 | Guide Vane | Stainless Steel | AISI304 | |
| 7 | Bearing Bracket with Guide Vane | Stainless Steel | AISI304 | |
| 8 | Diffuser | Stainless Steel | AISI304 | |
| 11 | Pump Bearing | Cemented Carbide | ||
| 12 | Impeller | Stainless Steel | AISI304 | |
| 13 | Shaft | Stainless Steel | AISI304、AISl316L | |
| 14 | Impeller Spacer | Stainless Steel | AISI304 | |
| 15 | Pressure Barrel | Stainless Steel | AISl304 |
 | 16 | Coupling | Carbon Steel/Metal Powder | |
| 3 | Seal Chamber | Stainless Steel | AISI304 | |
| 9 | Suction | Stainless Steel | AISI304 | |
| 10 | Baseplate | Cast Iron |
| NO. | Component | Material | AISI/ASTM |
| 1 | Electric Motor | Assembly | ||
| 2 | Pump Head | Cast Iron/Ductile Iron | ||
| 4 | Mechanical Seal | Assembly | ||
| 5 | Discharge Guide Vane | Stainless Steel | AISI304 | |
| 6 | Guide Vane | Stainless Steel | AISI304 | |
| 7 | Bearing Bracket with Guide Vane | Stainless Steel | AISI304 | |
| 8 | Diffuser | Stainless Steel | AISI304 | |
| 9 | Suction | Cast Iron | ||
| 11 | Pump Bearing | Cemented Carbide | ||
| 12 | Impeller | Stainless Steel | AISI304 | |
| 13 | Shaft | Stainless Steel | AISI304、AISI316L | |
| 14 | Impeller Spacer | Stainless Steel | AISI304 | |
| 15 | Pressure Barrel | Stainless Steel | AISI304 | |
| 16 | Coupling | Carbon Steel/Metal Powder |
| 16 | Coupling | Carbon Steel/Powder Metallurgy | |
| 3 | Pump Head Liner | Stainless Steel | AISl304 | |
| 9 | Suction | Stainless Steel | AISI304 | |
| 10 | Baseplate | Cast Iron |
| Model | Matched Motor(KW) | Flow Rate(m²h) | 1 | 1.2 | 1.6 | 2 | 24 | 2.8 | 3.2 | Dimensions(mm) | Pump Weight（kg） | ||||
| B1 | B2 | H | D1 | D2 | |||||||||||
| CDL(F2-20 | 0.75 |
Head (m) | 18 | 17 | 16 | 15 | 13 | 12 | 10 | 304 | 250 | 554 | 170 | 142 | 20 |
| CDLF2-30 | 0.75 | 27 | 26 | 24 | 22 | 20 | 18 | 15 | 322 | 250 | 572 | 170 | 142 | 20 | |
| CDLF)2-40 | 0.75 | 36 | 35 | 33 | 30 | 26 | 24 | 20 | 340 | 250 | 590 | 170 | 142 | 22 | |
| CDLF2-50 | 0.75 | 45 | 43 | 40 | 37 | 33 | 30 | 25 | 358 | 250 | 608 | 170 | 142 | 23 | |
| CDL(F2-60 | 0.75 | 54 | 52 | 50 | 45 | 40 | 36 | 30 | 376 | 250 | 626 | 170 | 142 | 26 | |
| CDLF2-70 | 0.75 | 63 | 61 | 57 | 52 | 47 | 41 | 35 | 394 | 250 | 644 | 170 | 142 | 26 | |
| CDL(F2-80 | 1.1 | 72 | 70 | 65 | 60 | 54 | 48 | 40 | 412 | 250 | 662 | 170 | 142 | 28 | |
| CDLF2-90 | 1.1 | 81 | 78 | 73 | 67 | 61 | 54 | 45 | 430 | 250 | 680 | 170 | 142 | 28 | |
| CDL(F2-100 | 1.1 | 90 | 87 | 81 | 75 | 67 | 59 | 50 | 448 | 250 | 698 | 170 | 142 | 29 | |
| CDL(F2-110 | 1.1 | 98 | 95 | 89 | 82 | 73 | 64 | 55 | 466 | 250 | 716 | 170 | 142 | 29 | |
| CDL(F2-120 | 1.5 | 108 | 104 | 98 | 90 | 81 | 71 | 60 | 494 | 295 | 789 | 190 | 155 | 35 | |
| CDLF2-130 | 1.5 | 116 | 114 | 106 | 98 | 89 | 78 | 65 | 512 | 295 | 807 | 190 | 155 | 35 | |
| CDL(F2-140 | 1.5 | 126 | 122 | 115 | 105 | 95 | 84 | 70 | 530 | 295 | 825 | 190 | 155 | 36 | |
| CDLF2-150 | 1.5 | 134 | 130 | 123 | 112 | 100 | 90 | 75 | 548 | 295 | 843 | 190 | 155 | 36 | |
| CDL(F2-160 | 2.2 | 144 | 139 | 132 | 120 | 107 | 96 | 80 | 566 | 295 | 861 | 190 | 155 | 37 | |
| CDLF2-170 | 2.2 | 153 | 148 | 140 | 128 | 114 | 102 | 85 | 584 | 295 | 879 | 190 | 155 | 37 | |
| CDLF2-180 | 2.2 | 161 | 157 | 148 | 136 | 121 | 108 | 90 | 602 | 295 | 897 | 190 | 155 | 41 | |
| CDLIF2-190 | 2.2 | 170 | 166 | 156 | 144 | 128 | 114 | 95 | 620 | 295 | 915 | 190 | 155 | 41 | |
| CDL(F2-200 | 2.2 | 179 | 175 | 164 | 151 | 135 | 120 | 100 | 633 | 295 | 928 | 190 | 155 | 42 | |
| CDLIF2-210 | 2.2 | 188 | 184 | 172 | 158 | 142 | 126 | 105 | 641 | 295 | 936 | 190 | 155 | 42 | |
| CDLF2-220 | 2.2 | 197 | 192 | 180 | 165 | 14配 | 132 | 110 | 659 | 295 | 954 | 190 | 155 | 43 | |
| CDLF2-230 | 3 | 206 | 201 | 189 | 174 | 156 | 139 | 115 | 687 | 330 | 1017 | 197 | 165 | 51 | |
| CDL(F2-240 | 3 | 215 | 210 | 197 | 182 | 163 | 146 | 120 | 705 | 330 | 1035 | 197 | 165 | 51 | |
| CDLF2-250 | 3 | 224 | 219 | 206 | 190 | 171 | 152 | 125 | 723 | 330 | 1053 | 197 | 165 | 52 | |
| CDLF2-260 | 3 | 232 | 228 | 214 | 198 | 179 | 158 | 130 | 741 | 330 | 1071 | 197 | 165 | 52 | |
Dimensions for single-phase and explosion-proof motors may vary. Please contact us for detailed specifications.
Media Requirements：
Applicable media: Clean, low-viscosity, non-flammable and non-explosive liquids
Solid content limit: Free from solid particles or fibers
Temperature Limits：
Standard type media temperature: -15°C ~ +70°C
Hot water type media temperature: -15°C ~ +105°C
Ambient Conditions：
Ambient temperature: ≤40°C
Altitude: ≤1000 m
National Standard Compliance: Strictly manufactured per GB/T 5657-2013 “Centrifugal pumps technical conditions (Class III)” & JB/T 2727-2014 “Vertical multi-stage centrifugal pumps”. Hydraulic performance & mechanical safety 100% compliant.
International Quality System: ISO 9001:2015 certified. Core pressure-bearing components evaluated per CE/PED 2014/68/EU, meeting EU/US market entry requirements.
Motor Protection Certification: Standard IP55 motors, optional IP54 outdoor type, compliant with IEC 60034 rotating electrical machines standards, suitable for humid/dusty industrial environments.
Factory Inspection Standard: Every unit undergoes 1.5× rated pressure hydrostatic test (5-min hold) + G2.5 dynamic balance calibration + leakage test (≤3 drops/min), guaranteeing zero-fault delivery.
Fast Standard Delivery: Covers flow 1–500 m³/h, head 20–300 m. Standard 304 stainless steel + IP55 motors. Technical confirmation & sample prototyping within 72 hours.
Deep Customization Capabilities:
Material Upgrade: Wetted parts optional in 316L, duplex 2205, or PTFE-lined for high-chloride/mild acid-alkali media.
Seals & Motors: Optional high-temp mechanical seals (up to 105℃), explosion-proof motors (Ex d IIB T4), IE4 ultra-efficiency or VFD-dedicated motors.
Structural Adaptation: Flange standard switching (GB/ANSI/DIN/JIS), reinforced base, pre-installed flexible joints, outdoor rain-proof canopy.
Intelligent Expansion: Pre-wired interfaces for pressure/flow/dry-run sensors; supports VFD cabinets, IoT remote monitoring, intelligent protection modules (dry-run/phase-loss/overload).
Please contact us for customization inquiries. Our engineering team delivers process proposals within 48 hours.
Installation Key Points:
1.Mount pump vertically on solid foundation. Tighten anchor bolts symmetrically. Ensure shaft verticality deviation ≤0.5 mm/m to prevent seal failure from misalignment.
2.Connect inlet/outlet with flexible rubber joints. Never transmit pipe stress to pump body. Provide independent supports for inlet/outlet piping.
3.Motor junction box faces outward. Secure cable along pipe wall. Grounding resistance ≤4 Ω. Manually rotate shaft 3 turns before startup.
4.Prime pump & vent air. Confirm full liquid via top drain/pressure ports. Jog test to verify rotation (clockwise from motor end).
Commissioning Process: Prime & vent → Jog test for direction → No-load run 5 min → Slowly open discharge valve to rated duty → Record current/pressure/vibration/temp rise → Acceptance.
Request the “CDL/CDLF Vertical Multi-Stage Centrifugal Pump Installation & Maintenance Manual” (PDF/English version) for complete dimensional drawings, flange specs, and commissioning logs.
Q1: How does back-pull-out design enable maintenance without disconnecting piping?
After loosening tie-rods, motor + bracket + impeller assembly can be pulled out rearward as a unit. Core components (seals/bearings/impellers) are exposed for maintenance without disconnecting inlet/outlet pipes.
Q2: How to select between CDL and CDLF material configurations?
CDL standard 304 SS suits clean water/non-corrosive media; CDLF standard 316 SS suits mild corrosive conditions with chlorides/weak acids-alkalis. For strong corrosion, customize duplex steel/PTFE-lined solution.
Q3: How does intelligent protection system guard against dry-run/phase-loss/overload?
Built-in dry-run sensor monitors pump chamber liquid level. Phase-loss/overload protection integrated in motor control circuit. Fault signal triggers auto-shutdown within 0.5 seconds to prevent motor burnout.
Q4: What customizations are needed for hot water type (≤105℃)?
Upgrade high-temp mechanical seals (FKM O-rings + SiC mating faces) + pump body insulation jacket + enhanced motor cooling. Specify max media temperature when ordering.
Q5: What adjustments are needed for altitudes >1000m?
Cooling & insulation strength drop ~10%/1000m due to thin air. Derate 10%–15% or add forced cooling fan. Provide actual altitude for custom evaluation.
