SCM DOUBLE IMPELLERS CENTRIFUGAL PUMP

Component

Pump Body: Cast Iron

Pump Support: Cast Iron

Motor Housing: Aluminum Alloy

Impeller: Double Brass Impeller

Motor Shaft: Carbon Steel, 304SS weld if request

Mechanical Seal: Ceramic/Graphite

Operating Condition

Liquid Temperature up to 60 °C

Ambient Temperature up to 40 °C

Total Suction Lift up to 9 m

Motor

1~220V/50Hz, 110V/60Hz, 220V/60Hz on request

Insulation Grade: Class B

Cooling: External Ventilation

Protection: IP44

Build-in with Thermal Protector

Continuous Work S1

Model Parameters

Overview

The CGO SCM2 double impeller centrifugal pump is built around a twin-stage brass impeller configuration that generates substantially higher head pressure than a conventional single-stage design. Five models—SCM2-45 through SCM2-68—span 0.75kW to 2.2kW and deliver maximum heads from 35m to 60m, making the SCM2 a reliable high head centrifugal pump for building water supply, HVAC circulation, and agricultural irrigation where head demands routinely exceed what a single-impeller cast iron centrifugal pump can provide. IP44 protection, Class B insulation, S1 continuous-duty rating, and an embedded thermal protector round out a specification designed for demanding, long-run installations.

Key Features

Double Brass Impeller Design — The twin brass impellers are the defining feature of the SCM2 double impeller centrifugal pump. Brass allows precision-machined clearances that plastic cannot match, and the dual-stage layout boosts hydraulic pressure progressively—enabling the SCM2-68 to reach 60m head at 2.2kW, a figure that most single-stage cast iron centrifugal pumps of the same power class simply cannot achieve.

Ceramic/Graphite Mechanical Seal — Precision-lapped seal faces maintain a leak-free interface across sustained duty cycles, even as liquid temperature approaches the rated 60°C ceiling—an important advantage for a brass impeller centrifugal pump serving warm-water circulation loops.

Five-Model Power Range — The lineup steps cleanly from 0.75kW to 2.2kW (1.0HP to 3.0HP), letting engineers select the closest match to system requirements without resorting to oversized or custom configurations.

IP44 Protection & Thermal Protector — External splash resistance and an embedded motor thermal cutout both extend service life in partially exposed or mechanically demanding installation environments.

Technical Advantages

The double impeller centrifugal pump architecture delivers two concrete engineering benefits over a single-stage configuration. First, total pressure rise is split across two impeller stages rather than concentrated in one; each impeller therefore operates at lower differential pressure, reducing hydraulic stress on the impeller vanes and the mechanical seal. Lower per-stage stress means less bearing load and longer seal life—an important consideration when specifying a cast iron centrifugal pump for 24/7 HVAC or industrial circulation service.

Second, the twin-impeller layout partially cancels axial thrust. In a single-stage high head centrifugal pump running near its maximum duty point, net axial force on the shaft can be substantial; the SCM2's balanced dual-impeller arrangement moderates this force, resulting in smoother rotation and reduced vibration. CGO machines each volute passage to tight radial clearance tolerances, keeping hydraulic efficiency consistent across the entire operating range over the life of the pump.

Application Scenarios

The SCM2 double impeller centrifugal pump fits anywhere that head requirements push beyond the comfortable range of standard single-stage pumps. Typical applications include building water supply in mid-rise residential and commercial structures needing 35–60m of static head, HVAC hot and chilled water circulation in large cooling and heating loops, agricultural irrigation across layouts with significant elevation changes, and light industrial process water supply for cooling, washing, and transfer operations. The cast iron centrifugal pump's 1¼"–1½" port sizing pairs naturally with standard international pipework, simplifying retrofit and new-build specification alike. Air-conditioning system water circuits that demand continuous, reliable high-pressure flow are another strong fit for the brass impeller centrifugal pump.

Why Choose CGO

Choosing the right double impeller centrifugal pump involves matching hydraulic performance, long-term serviceability, and total cost of ownership. CGO addresses all three. The SCM2 series uses widely available ceramic/graphite seal cartridges compatible with standard replacement kits, so field maintenance stays straightforward without proprietary parts or special tooling. The clean five-model range covers the majority of commercial and industrial high head centrifugal pump sizing requirements from a compact stocking position.

OEM buyers and system integrators can request 304 stainless steel shaft welding for installations where local water chemistry demands extra corrosion resistance. IP44 protection and Class B insulation satisfy the baseline requirements of most international electrical installation standards, supporting export without additional re-certification effort. The SCM2 brass impeller centrifugal pump reflects CGO's commitment to export-ready, practically engineered solutions for demanding global markets.

FAQ

Q: How does the double brass impeller improve performance over a single-stage design?

A: The dual-impeller layout splits total pressure rise across two stages, reducing hydraulic load per stage and producing a steeper head-flow curve. This allows the SCM2 double impeller centrifugal pump to reach 60m head at 2.2kW—significantly higher than most single-stage cast iron centrifugal pumps of the same power class.

Q: Can the SCM2 handle warm water up to 60°C?

A: Yes. The rated liquid temperature tolerance is up to 60°C, making the SCM2 suitable for heating circulation loops and solar thermal system return lines.

Q: Is the SCM2 self-priming?

A: No. The pump must be primed before startup. Suction lift should not exceed 9m for reliable operation of this high head centrifugal pump.