Description
Screw pair for submersible pump 4S QGD 0.37 kW (Euroaqua, Aquatica)
Repair screw pair (rotor + stator sleeve) for restoring operating parameters and nominal pressure of deep-well screw (auger) pumps with a diameter of 4 inches (4" / 100 mm) and a power of 0.37 kW. The mechanism consists of a metal spiral worm with a coupling and an elastic rubber sleeve with a spiral internal channel. When the rotor rotates, the liquid moves continuously along the axis from the suction part to the discharge pipe, creating high pressure even at low water flow rates.
Key Advantages and Features:
- Wear-resistant chrome coating of the rotor: The metal screw is made of durable steel with a polished anti-corrosion coating, which reduces friction and extends the part's service life when pumping water with silt or fine sand impurities.
- Elastic wear-resistant rubber: The sleeve (stator) is made of high-density oil-and-gas resistant technical rubber, ensuring 100% tightness of the working cavities and high pump efficiency.
- Ready-to-use repair kit: Supplied as a complete assembly (screw worm with adapter coupling and matching rubber sleeve with mounting flange), which eliminates issues with fitting dissimilar parts.
- Standardized mounting dimensions: Precise matching of dimensions ensures easy installation into the hydraulic part housing without additional modifications.
Compatibility and Application:
Used for screw borehole and well pumps of the 4S QGD / QGD size with a power of 0.37 kW (0.5 HP):
- Euroaqua: 4S QGD 1.2-50-0.37, 4S QGD 1.8-50-0.37, 4S QGD 2.5-60-0.37.
- Aquatica (Leo): 4QGD 0.37 kW (777211 series models and analogues).
- Sprut: 4S QGD 1.2-50-0.37, QGDa 0.37 kW.
- Omnigena: 3 QGD, 4 QGD 0.37 kW.
- Other manufacturers: Vodoley, Needle, Taifu, Rona, Foras, Werk, Kenle, Cristal, Optima and other Chinese and European submersible screw pumps if the geometric dimensions of the sleeve and screw match.
Technical Specifications:
| Parameter | Value / Characteristic |
|---|---|
| Spare part type | Screw pair (rotor + stator / worm + sleeve) |
| Compatible pump size | 4S QGD (4 inches / ∅100 mm) |
| Nominal motor power | 0.37 kW (370 W) |
| Rubber support skirt (flange) diameter | 68 mm |
| Rubber sleeve barrel diameter | 33.5 mm |
| Worm (rotor) length | 95 mm |
| Screw (worm) diameter | 15 mm |
| Thread | Left-hand 12 mm |
| Material | Alloyed chrome steel / heat-resistant rubber (NBR) |
| Condition | New kit |
Package Includes:
- Screw rotor (worm) with flexible adapter coupling — 1 pc.
- Rubber stator sleeve with support flange — 1 pc.
Technician's tip: The main reason for screw failure is "dry running" (the rubber burns instantly from friction without water lubrication) or jamming by sand. When assembling the pump, be sure to lubricate the metal worm and the inner surface of the rubber sle
