{"id":1215,"date":"2026-08-29T20:00:00","date_gmt":"2026-08-29T12:00:00","guid":{"rendered":"https:\/\/borrapumps.com\/blog\/deep-well-pump-selection\/"},"modified":"2026-08-29T20:00:00","modified_gmt":"2026-08-29T12:00:00","slug":"deep-well-pump-selection","status":"publish","type":"post","link":"https:\/\/borrapumps.com\/ru\/blog\/deep-well-pump-selection\/","title":{"rendered":"\u041f\u043e\u0434\u0431\u043e\u0440 \u0441\u043a\u0432\u0430\u0436\u0438\u043d\u043d\u043e\u0433\u043e \u043d\u0430\u0441\u043e\u0441\u0430: \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b \u0440\u0430\u0441\u0445\u043e\u0434\u0430, \u043d\u0430\u043f\u043e\u0440\u0430, \u0441\u043a\u0432\u0430\u0436\u0438\u043d\u044b \u0438 \u043c\u043e\u043d\u0442\u0430\u0436\u0430"},"content":{"rendered":"

Deep well pump selection begins with the well, not the pump catalog. Confirm the required flow, static water level, pumping water level at the design withdrawal rate, well depth and casing diameter, discharge elevation, pipeline friction, pressure requirement, water quality, sand content, power supply, and operating schedule. Use the pumping water level\u2014not merely the total drilled depth\u2014to calculate normal dynamic head, then check the worst credible drawdown and minimum submergence. The selected pump curve should meet the duty point without overloading the motor or operating outside the manufacturer's permitted range. A pumping test and current well record are more reliable than assumptions based on nearby wells.<\/p>\n

This guide is an early-stage engineering and procurement framework. Confirm every calculated value, operating limit, safety requirement, and regulatory obligation against current project documents, approved manufacturer data, and the responsible engineer’s review before selecting equipment or changing an installed system.<\/p>\n

Contents<\/strong><\/p>\n
    \n
  1. Start with well yield and drawdown<\/a><\/li>\n
  2. Build total dynamic head<\/a><\/li>\n
  3. Confirm physical fit and submergence<\/a><\/li>\n
  4. Match the curve, stages, and motor<\/a><\/li>\n
  5. Account for water quality and sand<\/a><\/li>\n
  6. Prepare the procurement and acceptance record<\/a><\/li>\n
  7. Decision table<\/a><\/li>\n
  8. Frequently asked questions<\/a><\/li>\n<\/ol>\n<\/div>\n

    Start with well yield and drawdown<\/h2>\n

    A deep well pump cannot sustainably deliver more water than the well and aquifer can provide. Static level is measured before pumping; pumping level is the stabilized level while water is withdrawn. Their difference is drawdown. Obtain a recent step-drawdown or constant-rate test when the project warrants it, and record the test flow, duration, recovery, and seasonal context. A short domestic test may not represent an agricultural or industrial duty. The design flow should balance the process demand, storage capacity, and sustainable yield. If demand peaks are brief, a storage tank can reduce the required well-pump rate. Selecting a pump for an optimistic flow can pull the level toward the intake, introduce air or sediment, increase energy use, and shorten equipment life.<\/p>\n

    Build total dynamic head<\/h2>\n
    \"QJ
    A deep well pump must fit the casing and operate below the pumping water level.<\/figcaption><\/figure>\n

    Total dynamic head combines vertical lift from the pumping water level to the discharge reference, required discharge pressure, and friction losses through rising main, fittings, valves, filters, meters, and surface piping. Convert pressure to head using the liquid density and consistent units. Do not use total well depth as vertical lift unless the geometry truly requires it. Calculate at the design flow because friction changes strongly with velocity. Then create a second case for the lowest expected pumping level, dirty filters, or another credible high-head condition. The pump must satisfy the required flow in normal service while remaining within motor and pump limits at the edge cases. Keep assumptions visible so future water-level data can be substituted without rebuilding the calculation.<\/p>\n

    Confirm physical fit and submergence<\/h2>\n

    Compare the pump's maximum outside diameter, cable guards, check valves, couplings, and installation clearances with the actual casing and any liner. Confirm the intake setting relative to the pumping water level and well bottom. Adequate submergence helps prevent vortexing and air entry, while excessive proximity to the bottom can increase sediment intake. The correct minimum submergence and cooling-flow requirement come from the pump and motor manufacturer. Some submersible motors need water moving past the motor for cooling; a flow sleeve may be required in large casings or open-water installations. Review column-pipe strength, cable support, lifting method, wellhead seal, non-return valves, and access for removal.<\/p>\n

    Project decision table<\/h2>\n
    \n\n\n\n\n\n\n\n\n\n\n
    Selection input<\/th>\nUse in the decision<\/th>\nCommon error<\/th>\n<\/tr>\n<\/thead>\n
    Pumping water level at design flow<\/td>\nSets the main vertical-lift component<\/td>\nUsing static level only<\/td>\n<\/tr>\n
    Required flow<\/td>\nMatches well yield and process demand<\/td>\nSelecting from pipe size<\/td>\n<\/tr>\n
    Discharge pressure and friction<\/td>\nCompletes total dynamic head<\/td>\nIgnoring filters and fittings<\/td>\n<\/tr>\n
    Casing diameter and pump setting<\/td>\nConfirms physical fit and cooling<\/td>\nChecking nominal pump diameter only<\/td>\n<\/tr>\n
    Water analysis and sand condition<\/td>\nGuides materials and operating boundary<\/td>\nAssuming all groundwater is clean<\/td>\n<\/tr>\n
    Voltage, cable length, starter<\/td>\nChecks voltage drop and starting<\/td>\nTreating electrical scope separately<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Match the curve, stages, and motor<\/h2>\n

    Plot the duty point on the manufacturer's certified curve for the proposed frequency and impeller or stage configuration. Review efficiency, absorbed power, minimum and maximum recommended flow, shutoff head, and motor margin. A multistage pump creates head through successive stages; adding stages is not a substitute for confirming the operating range. Check whether the motor can carry absorbed power across the expected curve, not only at one point. Voltage drop in a long down-well cable can affect starting and running performance, so coordinate cable size, starter, protection, and supply. For variable-speed operation, ask for the permitted speed range, motor cooling limits, resonance considerations, and a curve or calculation at the planned speeds.<\/p>\n

    Account for water quality and sand<\/h2>\n
    \"Engine-driven
    Above-ground suction pumps and deep-well submersible pumps suit different source conditions.<\/figcaption><\/figure>\n

    Request water analysis for corrosion, scaling, temperature, and material compatibility when the duty is more demanding than clean freshwater service. Sand and suspended solids can erode impellers, diffusers, bearings, and check valves. Do not assign a universal allowable sand concentration without the specific pump data. If a new or rehabilitated well produces sand, investigate well development, screen condition, setting depth, and pumping rate before treating pump material as the only solution. For potable service, applicable local health requirements, approved materials, sanitary wellhead details, and disinfection procedures are project responsibilities. The pump supplier needs the actual liquid description and analysis to recommend materials without guessing.<\/p>\n

    Prepare the procurement and acceptance record<\/h2>\n

    A useful request for quotation states design and alternate duty points, static and pumping levels, test date, well and casing dimensions, pump setting, discharge elevation and pressure, piping description, liquid analysis, sand condition, voltage, frequency, starting method, controls, cable length, operating hours, quantity, and destination. Ask for the pump curve, motor data, materials, dimensions, weight, cable and joint instructions, check-valve arrangement, installation limits, and spare-parts list. During acceptance, verify insulation and continuity using approved procedures, rotation or phase sequence as applicable, flow, discharge pressure, current, voltage, water level, vibration or noise observations, and drawdown stabilization. Preserve these readings as the baseline for future changes in well performance.<\/p>\n

    How to compare supplier offers<\/h2>\n

    Review supplier offers against the same well profile. Put static level, design pumping level, minimum expected level, pump setting, casing inside diameter, design flow, discharge head, and liquid condition at the top of the comparison. Check that every proposed curve uses the stated frequency and stage configuration and that absorbed power remains within the motor rating across the credible range. Compare cable length and size, joint kit, non-return valve, column or rising-main scope, sensors, starter, dry-run protection, and removal tools. If one supplier assumes a different water level or pipe loss, normalize the calculation before comparing efficiency or price. Request dimensional confirmation for every component passing through the casing. Finally, define the data to be recorded during the first stabilized pumping test so the installed well performance can be compared with the selection basis rather than judged only by whether water reaches the outlet.<\/p>\n

    How this guide connects to BORRAPUMP equipment<\/h2>\n

    This article supports early project review for the deep well pump selection<\/a> product line. It does not assign a final model. Send the duty conditions, liquid data, power supply, installation drawings, controls, quantity, and destination so the product configuration can be checked against the actual project.<\/p>\n

    Related BORRAPUMP engineering guides<\/h2>\n
      \n
    • well booster pump diagram requirements<\/a><\/li>\n
    • self-priming pump suction lift inputs<\/a><\/li>\n
    • submersible versus self-priming drainage pumps<\/a><\/li>\n<\/ul>\n

      Authoritative sources and further learning<\/h2>\n

      USGS Groundwater Wells<\/a> U.S. EPA Private Drinking Water Wells<\/a> CDC Well Water Safety<\/a>. These sources establish general engineering, safety, or regulatory context; the current adopted rules, equipment manuals, and project approvals remain controlling.<\/p>\n