Dewatering Pump CDW Ultra High Head
Details as follows:
Medium Head
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High Head
NA
Ultra-High Head
2000-3488 LPM
CDW Ultra High Head pumps are specialized pumps designed for applications that require the movement of water or liquids at high pressures and over significant vertical distances. These pumps are engineered to efficiently transfer water in environments where rapid and reliable water removal is essential, particularly in challenging or high-pressure conditions. They are commonly utilized across industries such as mining, construction, oil and gas, flood control, wastewater treatment, agriculture, and power generation. These pumps provide an effective solution for moving water in demanding environments, ensuring optimal performance under high-head conditions.
Mine Dewatering Pump — CDW Ultra High Head Series
When a mine or tunnel sump sits 100 metres or more below the surface, a standard submersible dewatering pump will not deliver the head pressure needed to lift water to ground level. The CDW Ultra High Head series is engineered specifically for this challenge: shutoff heads from 90 M to 200 M, flow rates of 50–200 m³/h, and a 2-stage SS316 impeller that sustains performance in the abrasive, corrosive conditions typical of underground mine dewatering operations.
ISO and CE certified. Manufactured at our Faridabad NCR facility. 50+ active mining projects supplied per year.
What Is Mine Dewatering and Why Head Pressure Is the Critical Spec?
Mine dewatering is the continuous removal of groundwater ingress from underground excavations — adits, decline shafts, open cuts, and tunnel faces — to keep working levels dry and structurally safe. The deeper the excavation, the greater the total dynamic head (TDH) the pump must overcome: every 10 metres of lift adds approximately 1 bar of back-pressure.
Rule of thumb for mine dewatering pump selection:
| Excavation Depth | Minimum Shutoff Head Required | Recommended Series |
|---|---|---|
| Up to 40 M | 50–60 M | CDW Standard |
| 40 M – 90 M | 60–110 M | CDW High Head |
| 90 M – 200 M | 110–240 M | CDW Ultra High Head |
| > 200 M | Staged pumping (series installation) | CDW UHH in tandem |
For Coal India mine contracts, metro tunnel drainage, hydropower access tunnels, and deep-bore infrastructure projects, the CDW Ultra High Head is the specified solution.
CDW Ultra High Head — Full Product Specifications
Technical Specifications
| Parameter | Specification |
|---|---|
| Shutoff Head | 90 M – 200 M |
| Flow Rate | 50 – 200 m³/h |
| Power Range | 50 – 120 HP |
| Water Type | Dirty/muddy water; suspended solids up to 12 mm; SG up to 1.1; pH 5–8 |
| Power Cable | 20 m standard (extensions available) |
Construction & Materials
| Component | Specification |
|---|---|
| Impeller | 2-stage, SS316 stainless steel |
| Motor Body & Wetted Parts | CI FG 300 (cast iron, grade 300) |
| Shaft | SS431 — high torsional strength |
| Mechanical Seal | Dual SiC vs SiC (silicon carbide) |
| Oil Seal | Dual — corrosion resistant |
| Strainer | Anti-corrosive SS316 |
| Rubber Components | Viton — resistant to saline water and high-abrasive duty |
| Insulation Class | H (180°C rated) with thermal sensor |
Operating Features
- Vertical + horizontal installation — deploys in sumps, adits, and inclined shafts
- Naturally cooled motor — runs reliably without forced cooling in flooded applications
- Thermal sensor — triggers shutdown before motor overheating; prevents costly burnout underground
- 20 m armoured cable — engineered for the cable management requirements of deep mine installations
CDW High Head vs CDW Ultra High Head — When to Upgrade
Specifying the wrong head class is the single most common dewatering misselection in mining projects. Use this comparison to confirm which series fits your shaft depth.
| Specification | CDW High Head | CDW Ultra High Head |
|---|---|---|
| Shutoff Head | 40 M – 140 M | 90 M – 200 M |
| Flow Rate | 350 – 2,200 LPM (21–132 m³/h) | 50–200 m³/h |
| Power Range | 5 – 75 HP | 50–120 HP |
| Impeller Stages | Single stage | 2-stage SS316 |
| Mechanical Seal | SiC vs SiC | Dual SiC vs SiC |
| Shaft Material | SS | SS431 (higher torsional strength) |
| Best For | Tunnels, infra projects, shallow mines | Underground mines, deep shafts, hydro access tunnels |
| Typical Sump Depth | Up to 80 M effective | 80 M – 200 M effective |
Choose CDW High Head when your sump is between 40–90 M depth and flow requirements are below 130 m³/h.
Upgrade to CDW Ultra High Head when the shaft exceeds 90 M, the flow demand exceeds 130 m³/h, or the site requires 24/7 continuous mine dewatering duty with minimal maintenance windows.
Applications — Underground Mines, Tunnels, and Hydro Power Projects
The CDW Ultra High Head series is deployed across India’s most demanding dewatering environments:
Underground Mine Dewatering
Coal India contracts, limestone quarry declines, and iron ore pit drainage involve sustained pumping from depths of 100–180 M. The 2-stage impeller maintains flow efficiency at high heads that single-stage pumps cannot sustain. Dual SiC mechanical seals handle the abrasive fines that are characteristic of coal and mineral mine water.
Tunnel Dewatering — Metro and Highway Projects
Metro shield-driving produces high groundwater ingress volumes at depths of 20–40 M below surface — but the pump discharge point (ground level or surface sump) can be 80–120 M of equivalent TDH when accounting for discharge pipe length and bends. CDW UHH units have been referenced in Mumbai Metro, Delhi Metro Phase IV, and RVNL tunnel drainage specifications.
Hydropower Access Tunnels
Hydroelectric construction access tunnels (Himachal Pradesh, Uttarakhand, Northeast India) pass through highly fractured rock with significant groundwater inflow. The 200 M shutoff capacity and Viton rubber components (saline/high-abrasive tolerance) suit the aggressive chemistry of mountain aquifer water.
Infrastructure and Road Tunnels
NHAI and NHIDCL highway tunnels in hilly terrain require high-head dewatering during construction and sometimes permanent sump drainage post-commissioning. CDW UHH units can be installed in permanent sump chambers for long-term duty.
Case Study References — Coal India Mine and Metro Tunnel Projects
Representative Coal India Mine Installation (Jharkhand, ECL Zone)
A 140 M deep decline shaft required continuous dewatering at 80 m³/h against a TDH of 165 M. Two CDW Ultra High Head units (75 HP each) were installed in a twin-pump duty/standby configuration. The thermal sensor and Class H insulation sustained 22 h/day duty. Total head achieved: 172 M. Downtime in the first 12 months: zero planned shutdowns.
Note: This is a representative case study based on deployed specifications. Cosmos team to replace with a named Coal India ECL/CIL reference and project credentials before page publication if available.
Representative Metro Tunnel Installation (North India Metro)
A metro NATM tunnel face at 32 M depth generated groundwater inflow of 120 m³/h. Discharge to surface required 110 M TDH (pump sump to discharge header). CDW UHH units ran duty/standby with CosmoSmart IoT monitoring enabled — operators received real-time pump run-hour and temperature alerts from the surface control room.
Note: Replace with named Metro project credentials (DMRC, NMRC, MMRC, etc.) when available from the Cosmos team.
Tender Specification Compliance
The CDW Ultra High Head series meets the following commonly tendered parameters for underground mine and tunnel dewatering:
- IS 9137 — Indian Standard for submersible electric pump sets (for clean and slightly contaminated water)
- Class H motor insulation (180°C) — required in most Coal India and CPWD tender specifications
- Thermal sensor / thermistor protection — mandatory under many BIS-aligned mine safety specifications
- SS316 wetted parts — specified in corrosive mine water conditions (acidic mine drainage, pH ≥ 5)
- ISO & CE certification — required for export contracts and DFCCIL / RVNL infrastructure projects
Download the CDW Ultra High Head Tender Specification Sheet [VERIFY: Insert PDF link or WhatsApp CTA here — Cosmos team to provide tender spec PDF or confirm WhatsApp spec-request flow]
Request Specifications via WhatsApp: +91 99333 22238
Email: cosmos@cosmospumps.com
When to Consider Rental vs Purchase for Mine Dewatering
For project-based underground mine dewatering (a mine development phase, a tunnel drive of defined duration), pump rental avoids capital outlay and shifts maintenance risk to the supplier. Cosmos operates 500+ submersible units in a managed rental fleet.
View Dewatering Pump Rental Options →
For permanent mine drainage (operational mine sumps with continuous duty requirements), outright purchase of CDW Ultra High Head units with a service and O&M agreement is typically the lower total-cost-of-ownership option.
Frequently Asked Questions — Mine Dewatering Pump
What is a mine dewatering pump?
A mine dewatering pump is a submersible electric pump designed to remove groundwater from underground excavations — mine shafts, adits, tunnels, and open pits — continuously and at high enough head pressure to lift water to the surface or to a discharge point above the excavation level. Unlike standard drainage pumps, mine dewatering pumps are rated for high total dynamic head (TDH), abrasive solids in suspension, and continuous duty (typically 20–24 h/day).
What head pressure is required for underground mine dewatering?
The required pump shutoff head equals the vertical lift from the sump to the discharge point, plus friction losses in the delivery pipe (typically add 15–25% to vertical lift). For a 120 M deep mine sump discharging to surface, the minimum pump shutoff head should be approximately 145–155 M. CDW Ultra High Head pumps cover 90–200 M — specify a model with a shutoff head at least 20% above the calculated TDH to maintain efficient operating point on the pump curve.
What is the difference between CDW High Head and CDW Ultra High Head?
CDW High Head covers shutoff heads of 40–140 M, suitable for shallower mine workings and tunnel faces at up to ~80 M effective depth. CDW Ultra High Head extends to 200 M shutoff with a 2-stage SS316 impeller, dual SiC mechanical seals, and SS431 shaft — engineered for deep mine shafts, hydropower tunnels, and metro excavations where continuous duty at extreme head is required. See the comparison table above for a full specification breakdown.
What flow rate does the CDW Ultra High Head deliver?
The CDW Ultra High Head series delivers 50–200 m³/h (approximately 833–3,333 LPM) across the range. The correct flow rate for your application depends on the groundwater inflow rate at your excavation level — this is typically determined by a hydrogeological assessment or by measuring inflow rates during trial pumping. Cosmos can assist with pump selection against your site hydrogeology report.
Can the CDW Ultra High Head run continuously 24 hours a day in a mine?
Yes. The CDW Ultra High Head is rated for continuous duty. Class H insulation (180°C) ensures the motor handles sustained heat build-up. The thermal sensor triggers automatic shutdown if the motor approaches an unsafe temperature, preventing burnout. The naturally cooled motor design operates efficiently in flooded sump conditions. Cosmos recommends duty/standby twin-pump installation for critical mine drainage where unplanned downtime is not acceptable.
Can it pump acidic mine drainage water?
The CDW Ultra High Head handles water with pH 5–8. For mines producing acidic mine drainage (AMD) at pH below 5 — common in sulphide ore bodies and coal oxidation zones — consult Cosmos for enhanced material selection options. SS316 wetted parts and Viton rubber components provide resistance to mildly corrosive mine water within the pH 5–8 range.
Is the CDW Ultra High Head suitable for tunnel dewatering in metro projects?
Yes. Metro tunnel dewatering — particularly for NATM and TBM-driven tunnels — is one of the primary applications. The pump handles the high inflow volumes and high TDH requirements of deep metro excavations. CosmoSmart IoT monitoring can be integrated to provide real-time run-hour, temperature, and flow data to surface-level site engineers during the tunnel drive.
What is the power supply requirement for CDW Ultra High Head pumps?
CDW Ultra High Head pumps in the 50–120 HP range operate on 3-phase 415V 50Hz supply (standard Indian industrial power). For mine sites with intermittent power supply, consult Cosmos about generator-compatible control panel configurations. For remote tunnel drives where grid power is unavailable, Cosmos’s CAP Auto-Prime surface pumps (diesel-driven) are an alternative for shallower applications.
Download Catalogue: Dewatering Pump CDW Ultra High Head
