Vertical Deep Well Pump
Technical Specifications & Hydraulic Performance
Selecting the correct vertical deep well pump requires matching borehole constraints with head-flow parameters. Review our standard hydraulic envelopes below or submit your system curve for custom configuration.
|
Parameter |
Standard Range / Specification |
Material Options |
|
Flow Rate (Q) |
50 to 1,200 m3/h (220 to 5,280 GPM) |
Cast Iron (ASTM A48 Cl.30) |
|
Total Dynamic Head (TDH) |
Up to 350 meters (1,150 ft) |
Stainless Steel 304 / 316 |
|
Borehole / Bowl Diameter |
6 inches to 16 inches |
Duplex Stainless Steel 2205 |
|
Operating Temperature |
-15C to 80C (Higher temp. on request) |
Bronze (ASTM B584 C90500) |
|
Drive Configuration |
Right-angle gear drive or Vertical hollow-shaft motor |
Shaft: AISI 416 / 316 |
Product Selection Guide (How to Specify)
To ensure hydraulic stability and prevent premature mechanical failure, evaluate the following operating criteria before issuing an RFQ:
Borehole Inner Diameter: Verify casing clearance. The pump bowl assembly outer diameter must leave at least a 25 mm annular space for unobstructed installation and adequate motor cooling water velocity.
Total Dynamic Head (TDH): Calculate static lift, friction losses through discharge piping, and surface pressure requirements. Ensure the operating point sits within +/- 10% of the Best Efficiency Point (BEP).
Water Chemistry & Solids Content: If pumping abrasive sand (exceeding 50 ppm) or corrosive brackish water, specify hardened wear rings (Chrome-plated SS) and higher-grade metallurgy (Duplex 2205) to inhibit pitting and volumetric wear.
Driver Type: Select vertical hollow-shaft electric motors for direct coupling, or right-angle gear drives connected to diesel engines for remote locations without reliable grid power.
Manufacturing & Quality Verification
Our production facility maintains strict dimensional and metallurgical control across all machining and assembly stages:
CNC Machining: Impellers and bowl diffusers are machined on 5-axis CNC vertical turning centers to maintain hydraulic profile tolerances within +/- 0.05 mm, minimizing internal recirculation losses.
Dynamic Balancing: All rotating assemblies (impellers and line shafts) are dynamically balanced to ISO 1940 Grade 6.3 (or Grade 2.5 on request) to eliminate lateral vibration during deep-setting operation.
Hydrostatic Testing: Every assembled bowl unit undergoes a 1.5x working pressure hydrostatic shell test for 30 minutes in accordance with API 610 / ISO 13709 standards.
Material Traceability: Raw material mill test certificates (EN 10204 3.1) are supplied with every shipment, verifying chemical composition for casting lots.
Engineering Visual Evidence & Documentation
Shop Floor Inspection Access: Clients and third-party inspectors (SGS, BV, TUV) are welcomed for witness testing and dimensional verification during CNC machining and dynamic balancing.
Engineering Submittal Package: Upon order placement, we issue comprehensive GA drawings, seismic calculation sheets, and rotor dynamics reports within 5 working days.
Frequently Asked Questions
Q: What is the maximum installation depth for your vertical deep well pumps?
A: Standard line-shaft driven configurations operate reliably down to 250 meters. For depths exceeding 250 meters, we evaluate torque transmission limits on the drive shaft or recommend submersible turbine pumps to eliminate shaft whipping and bearing wear.
Q: How do you prevent sand accumulation from seizing the pump during startup?
A: We utilize enclosed impellers paired with replaceable bronze or stainless steel wear rings maintaining close running clearances. For high-abrasion applications, tungsten carbide sleeve bearings and flush-water injection ports can be integrated into the line-shaft assembly.
Q: Can these pumps be driven by diesel engines instead of electric motors?
A: Yes. Pumps can be configured with a standard API-compliant right-angle gear drive (with specified gear ratios) to couple directly with industrial diesel engines, accompanied by flexible driveshafts and torsional vibration analysis reports.
Q: What inspection standards apply to the impellers and castings?
A: All pressure-containing castings undergo non-destructive testing (NDT) upon request, including liquid penetrant testing (PT) for machined surfaces and ultrasonic testing (UT) for critical structural sections, complying with ASTM acceptance criteria.
Q: What is the standard lead time for a custom-engineered pump order?
A: Standard production takes 8 to 12 weeks following drawing and data sheet approval. This includes raw material casting, CNC machining, dynamic balancing, factory performance testing (ISO 9906 Grade 1B), and protective crating for export.
Q: What performance testing documentation is provided prior to shipment?
A: Each pump is tested on our closed-loop test bench. A certified test report including head, flow, power consumption, overall efficiency curves, and NPSH data is issued in accordance with ISO 9906:2012 Grade 1B requirements.
Request for Quotation (RFQ) Checklist
To accelerate your technical review and quotation turnaround, please provide the following details in your inquiry:
• Required Flow Rate (Q) and Head (TDH)
• Well Inner Diameter and Depth to Water Table
• Fluid Properties (Temperature, pH, Specific Gravity, Sand Concentration)
• Power Supply Availability (Voltage / Frequency / Phase)
• Required Material Metallurgy or Project Specifications (e.g., API 610)
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