Twin-Impeller Centrifugal Pump
Twin-impeller (two-stage) centrifugal pumps for irrigation, booster pump, and transfer applications requiring higher pressure: single-phase and three-phase models.
Products (14)
- DAB K 45/50 T Twin-Stage Pump, 1.5 HP, 380 V – $639.77
- Kentaş 2CP25-120H Twin-Impeller Centrifugal Pump, 1.5 HP, 220V – Request a quote
- Leo 2ACm110 Twin-Fan Centrifugal Pump, 220 V, 140 L/min, 47 m – $244.53
- Leo 4ACm75 Twin-Impeller Centrifugal Pump, 220V, 90 L/min, 46.5 m – Request a quote (out of stock)
- Leo XHS1500 Self-Priming Centrifugal Pump, 380 V, 270 L/min, 15 m – Request a quote (out of stock)
- Nortek SKP 100 M Two-Stage Centrifugal Pump, 1 HP, 220V – $324.00
- Pedrollo 2CP 32/200C Twin-Impeller Centrifugal Pump, 70 m, 15 m³/h – $1,388.26
- Pedrollo 2CP 40/180C Twin-Impeller Centrifugal Pump, 64 m, 21 m³/h – $1,588.30
- Pedrollo 2CPm 25/14B Twin-Impeller Centrifugal Pump, 54 m, 6 m³/h – $663.88
- Sumak SMK 220/2 Two-Stage Centrifugal Pump, Single-Phase, 220V, 2.2 HP – $632.44
- Ulusu SCM Series Two-Stage Centrifugal Pump – Request a quote
- Varan 2TCP 25/140 Two-Stage Monobloc Pump, 1.5 HP, 220V – $253.44
- Varan KS-115 Two-Stage Monobloc Pump, 1.5 HP, 220 V – Request a quote (out of stock)
- Water Sound SCM2-80 Two-Stage Centrifugal Pump, 79 m, 12 m³/h, 380 V – $647.14
Brands: DAB · Kentaş · Leo · Nortek · Pedrollo · Sumak · Ulusu · Varan · Water Sound
What is a twin-impeller centrifugal pump?
In twin-impeller (two-stage) centrifugal pumps, water passes through two impellers arranged in series. Because the pressure added by the first impeller is boosted again by the second, a greater head is achieved at the same motor power compared to single-impeller pumps. This feature provides an advantage in sprinkler irrigation, at remote or elevated irrigation points, for the water supply of small buildings, and in pressure-demanding washing applications.
Single-impeller or twin-impeller?
- If the flow requirement is high and the pressure requirement is low, a single-impeller pump is more efficient.
- If the pressure requirement is high and the flow is moderate, a twin-impeller pump is preferred.
- If much higher pressure is required, horizontal multistage pumps or vertical multistage pumps should be considered.
Some models are self-priming; because these models can purge air from the suction line to a certain degree, they simplify installation.
Installation and use
The pump should be positioned close to the water source and, if possible, at an elevation close to the water level. The suction pipe should be kept short and fitted with a strainer-equipped foot valve at the end. In high-pressure applications, the pressure rating of the pipes and fittings on the discharge line must be selected to match the maximum pressure the pump can generate. Running the pump for an extended period against a closed valve will cause the water inside to heat up and damage the mechanical seal.
Frequently asked questions
Can a twin-impeller pump be used as a booster pump?
Yes; combined with a pressure switch, tank, or pressure controller, it can be used as a booster pump in low-rise buildings.
What advantage does a self-priming model offer?
Because it can purge air from the suction line, it primes more easily at first start-up and when the foot valve has a slight leak. Even so, the casing must be filled with water before the first start-up.
Why has the pump's pressure dropped?
Impeller wear, air in the suction, or a clogged strainer can cause a pressure drop. Check the suction line and strainer first.
Will a three-phase model run on single-phase power?
No; three-phase motors require a 380 V supply. If you only have household electricity, choose from the single-phase models.
Does a twin-impeller pump use more electricity?
Consumption is similar at the same motor power; the difference is that the pump uses that power to generate higher pressure. Avoiding oversizing the pump keeps energy consumption low.