Cart0 item(s) - 0.00€ 0

  • Your shopping cart is empty!

0

SQ submersible pumps

SQ submersible pumps
New
SQ submersible pumps
0 reviews • Write a review
price from
812.95€
Ex Tax: 812.95€
  • Stock: In Stock
  • Brand: Grundfos
  • Model: 96510179
  • Weight: 15.00кг
Grundfos Grundfos

Available Options

Add to Cart
Buy Now Question?
Add to Wish List Compare this Product

Free fast delivery to your address or a Speedy/Econt office.

Grundfos SQ – submersible pumps with constant speed and electronic protections

Grundfos SQ are fixed-speed submersible pumps designed for domestic water supply, small water supply systems, irrigation and tank applications. The pumps have built-in electronic protection, soft start, dry-running, overload, overvoltage, undervoltage and overheating protection, but do not offer variable speed like the SQE.

Constant speed Reliable operation with a fixed operating point.
Electronic protections Full protection of the motor and pump.
Soft start Reduction of starting current and wear.

Main advantages of SQ

  • Constant operating speed for reliable and predictable performance.
  • Built-in frequency converter with soft start to reduce starting current.
  • Dry running protection with automatic shutdown in the event of lack of water.
  • Overvoltage and undervoltage protection (150–315 V).
  • Overload protection with automatic speed reduction.
  • Overheating protection with temperature sensor in the electronic unit.
  • Upthrust bearing protection at low backpressure start.
  • Floating impellers with tungsten carbide/ceramic bearings for sand resistance.
  • Built-in check valve with spring.
  • High efficiency of the pump and motor.
  • Lightweight design for easy installation and handling.
  • Suitable for installation in wells with a diameter of 3 inches (75 mm) or larger.

Applications

  • Domestic water supply for single-family houses and villas.
  • Small water supply systems for residential buildings and commercial properties.
  • Irrigation of gardens, parks and agricultural areas.
  • Tank applications – filling and emptying.
  • Maintaining a constant water level in wells and pools.
  • Pumping from one tank to another.
  • Replacement of existing 4-inch submersible pumps in existing installations.

Suitable liquids

  • Thin, clean, non-aggressive and non-explosive liquids without solid or long-fiber particles larger than grains of sand.
  • pH value of the liquid between 5 and 9.
  • Maximum sand content – 50 g/m³ (increased content reduces service life).
For contaminated or hydrogen carbonate-containing groundwater, the SQ-N version made of AISI 316 stainless steel with an extended pH range of 2–13 is recommended.

General technical characteristics

Characteristics Value
Pump type Submersible pump with constant speed and electronic protection
Working fluid Clean, non-aggressive water (pH 5–9)
Maximum sand content 50 g/m³
Liquid temperature range 0–35 °C (Western, Central Europe and Asia-Pacific), 0–30 °C (North America)
Minimum flow velocity around the motor 0.15 m/s for temperature up to 40 °C
Degree of protection IP68
Insulation class F (155 °C)
Supply voltage 1 × 200–240V, 50/60Hz
Motor speed Constant speed (approx. 2900–3000 min⁻¹ at 50 Hz)
Output connection Rp 1¼" (SQ 1, 2, 3), Rp 1½" (SQ 5, 7)
Cooling From the pumped liquid through an internal circulation system
Engine protection Built-in electronic protection against dry running, overvoltage, low voltage, overload and overheating
Impeller type Floating impellers made of polyamide, reinforced with 30% glass fibers
Camps Tungsten carbide/ceramic for each impeller
Management Direct connection with pressure switch and pressure vessel, or via Pressure Manager (PM 1/PM 2)

Installation

The SQ can be mounted vertically, horizontally or in any intermediate position, as long as the pump does not fall below the horizontal level of the motor. For horizontal mounting, it is recommended to use a flow sleeve to ensure sufficient flow velocity around the motor and prevent sand or mud clogging.

The pump is suitable for installation in wells with a diameter of 3 inches (75 mm) or larger. The cable is 1.5 m long with a plug for direct connection.

System with pressure switch and pressure vessel

SQ is controlled by a pressure switch and a pressure vessel. When a tap is opened, the pressure in the vessel drops and the pump starts with a soft start (approximately 3 seconds). When the tap is closed, the pump stops when the set output pressure (pcut-out) is reached.

Recommended minimum size of the hydrophore tank – 0.5 m³ for stable operation. For smaller installations, an 18 liter tank is sufficient for all SQ pumps.

System with Pressure Manager

Through the Pressure Manager (PM 1 or PM 2) the SQ can operate with or without a pressure vessel. The Pressure Manager provides automatic start/stop when a tap is opened and closed, with built-in dry-running protection and the possibility of manual reset.

Maximum system pressure with Pressure Manager – 10 bar. Recommended height difference between water level and Pressure Manager – maximum 13 m.

Electronic protections

  • Dry-running protection: Automatic shutdown in the event of lack of water. The pcut-out value is factory-set and ensures shutdown in the event of lack of water in the well.
  • Overvoltage and undervoltage protection: Shutdown at voltage below 150 V or above 315 V. Automatic restart when returning to the permissible range.
  • Overload protection: Automatic speed reduction in case of increased load. Shutdown at speed below 3000 min⁻¹.
  • Overheating protection: A temperature sensor in the electronic unit switches off the motor at a critical temperature and restarts it automatically when it cools down.
  • Upthrust protection: An upthrust bearing protects the pump and motor when starting with very low backpressure.
SQ does not offer variable speed or communication with CU 300/CU 301 like SQE. For constant pressure and variable speed applications, choose SQE.

Component materials

Grundfos SQ is built from high-quality materials that ensure long service life, resistance to sand and corrosion, and high efficiency.

Component Material (SQ) Material (SQ-N)
Pump (impellers, diffusers) Polyamide reinforced with 30% glass fibers Polyamide reinforced with 30% glass fibers
Pump housing Stainless steel EN 1.4301 / AISI 304 Stainless steel EN 1.4401 / AISI 316
Shaft Stainless steel Stainless steel
Impeller bearings Tungsten Carbide / Ceramics Tungsten Carbide / Ceramics
Motor housing Stainless steel EN 1.4301 / AISI 304 Stainless steel EN 1.4401 / AISI 316
Rotor Asynchronous motor with short-circuited rotor Asynchronous motor with short-circuited rotor
Stator High efficiency copper coils High efficiency copper coils
Electronic unit Built-in frequency converter with soft start and electronic protections Built-in frequency converter with soft start and electronic protections
Check valve Built-in check valve with spring Built-in check valve with spring
Cable Submersible cable 1.5 m with plug for direct connection Submersible cable 1.5 m with plug for direct connection

Advantages of materials

  • Polyamide with 30% glass fibers: High strength, low weight and resistance to abrasive sand.
  • Tungsten carbide/ceramic: Exceptional wear resistance of impeller bearings, extending service life in sandy water.
  • Stainless steel AISI 304: High corrosion resistance for standard clean water applications.
  • Stainless steel AISI 316 (SQ-N): Increased corrosion resistance for aggressive environments, contaminated waters and applications with a high chloride index.
  • Asynchronous motor: Reliable and proven design for constant speed with high efficiency.
  • Built-in frequency converter: Soft start to reduce starting current and protect against electrical anomalies.
The SQ-N versions are designed for aggressive environments and contaminated waters with pH 2–13, while the standard SQ are for clean water with pH 5–9.

Approvals and certificates

Grundfos SQ has the necessary safety and quality approvals and certificates that guarantee reliable operation in domestic, commercial and industrial applications.

Major approvals

  • CE marking: The pump meets the requirements of European directives for safety, health and environmental protection.
  • UL approval: Compliance with Underwriters Laboratories standards for North America (for specific versions).
  • ISO 9906:2012 Grade 3: Hydraulic performance tested according to the international pump standard.
  • EN 60335-2-41: Safety standard for submersible pumps for wastewater and water supply.

Why are approvals important?

  • Health and Safety: Approvals ensure that the pump meets strict safety and reliability standards.
  • Regulatory compliance: The use of approved products is mandatory in many countries for installations related to water supply.
  • Trust and quality: Certified products have passed rigorous testing and meet high quality standards.
  • UL approval: Ensures compliance with North American safety standards and allows the pump to be used in the USA and Canada.
Before installation, check whether the specific product number has the necessary approvals for your country or region. If additional certifications are required, contact Grundfos or your distributor.

Comparison of SQ models

Grundfos SQ is available in several series according to nominal flow rate – SQ 1, SQ 2, SQ 3, SQ 5 and SQ 7. Each series includes several models with different maximum head. The SQ-N versions are made of stainless steel AISI 316 for aggressive environments.

Series Nominal flow rate Maximum head (approx.) Output connection Applications
SQ 1 1 m³/h 35–155 m (SQ 1-35 to SQ 1-155) Rp 1¼" Small domestic installations with low flow and high head
SQ 2 2 m³/h 35–115 m (SQ 2-35 to SQ 2-115) Rp 1¼" Standard domestic installations with moderate flow and pressure
SQ 3 3 m³/h 30–105 m (SQ 3-30 to SQ 3-105) Rp 1¼" Larger domestic and commercial installations with high flow rates
SQ 5 5 m³/h 15–70 m (SQ 5-15 to SQ 5-70) Rp 1½" Large installations, irrigation and water supply systems
SQ 7 7 m³/h 15–40 m (SQ 7-15 to SQ 7-40) Rp 1½" Industrial applications and large water supply systems with very high flow rates

Which model to choose?

  • SQ 1: Suitable for small domestic installations with low flow rates (up to 1 m³/h) and high head – for example deep wells for single-family houses.
  • SQ 2: Universal model for standard domestic installations with moderate flow rate (up to 2 m³/h) and head – the most commonly used choice for water supply to single-family houses and villas.
  • SQ 3: For larger domestic and commercial installations with high flow rates (up to 3 m³/h) – residential buildings, small commercial properties and irrigation of larger areas.
  • SQ 5: For large installations with very high flow rates (up to 5 m³/h) – irrigation of parks and agricultural areas, water supply systems for residential complexes.
  • SQ 7: For industrial applications and large water supply systems with maximum flow rate (up to 7 m³/h) and moderate head.

Difference Between SQ and SQE

  • SQ: Submersible pumps with constant speed, electronic protections (dry running, overvoltage, overload, overheating), soft start, control via pressure switch and pressure vessel or Pressure Manager. Lower price, suitable for standard applications without the need for variable speed.
  • SQE: Electronically controlled variable speed pumps (3000–10700 min⁻¹), constant pressure capability with CU 300/CU 301, two-way communication with Grundfos GO Remote, higher energy efficiency, higher price.
For aggressive environments and contaminated waters with pH 2–13, choose the SQ-N versions made of AISI 316 stainless steel. For clean water with pH 5–9, the standard SQ made of AISI 304 are suitable.

The technical specifications are in accordance with the provided Grundfos SQ technical catalogue. Please check the specific product number, voltage, cable length, version (SQ or SQ-N) and compatibility with control devices (pressure switch, Pressure Manager) before ordering.

Write a review

Note: HTML is not translated!
Rating
Bad Good