SCF125-80-350  UL/FM Horizontal Split Case Fire Pump  500–1000 GPM, 750 GPM @ 195 PSI  50Hz (2950 RPM) / 60Hz (3550 RPM)  Electric or Diesel Drive

NMFIRE fire pump packages are manufactured through advanced hydraulic design, precision machining, and strict quality control processes to ensure reliable operation in critical fire protection applications.

Advanced Computational Fluid Dynamics (CFD) analysis and 3D hydraulic design are applied to optimize internal flow performance:

• Improved hydraulic efficiency
• Reduced hydraulic losses
• Lower required motor power
• Stable flow and pressure performance

Pump casing manufacturing adopts Lost Foam Casting Technology to improve surface quality and hydraulic performance. Manufacturing capabilities include:

• CNC processed metal patterns
• Automatic molding line
• Automatic sand processing production line
• Intermediate frequency melting furnace
• VOD refining furnace
• Precision wax casting technology

Critical components are processed through precision CNC machining. Quality control includes:

• Impeller machining and dimensional inspection
• Shaft machining and runout verification
• Assembly alignment verification
• Dynamic balancing test for all rotating components

Each NMFIRE fire pump package undergoes factory performance verification before delivery per NFPA 20 requirements. Testing includes:

• Shut-off (churn) pressure testing — must not exceed 140% of rated pressure
• Rated flow and rated pressure verification
• 150% rated flow verification — pressure must be ≥65% of rated pressure
• Pressure-flow curve recording (minimum 5 test points)
• Operating parameter monitoring (vibration, temperature, noise)

Our dedicated fire pump test bench enables:

• Accurate flow measurement via calibrated flow meter
• Pressure monitoring at suction and discharge
• Complete performance curve generation
• Third-party witness testing arrangement per project requirements

For seawater service, corrosion-resistant, or other special material requirements, please contact us to discuss.

The SCF125-80-350 electric drive is available with motor size matched to each duty point from 100 to 250 HP:

• ODP (Open Drip Proof) — economical enclosure for clean, dry, well-ventilated indoor pump rooms
• TEFC (Totally Enclosed Fan Cooled) — sealed enclosure for dusty, humid, hot, or outdoor-adjacent environments; the common choice for African project sites

The SCF125-80-350 offers the most diesel engine options in the SCF range — six models spanning NM4 and NM6 series, rated 109–335 HP, all at 50Hz (2950/2200 RPM), giving maximum flexibility to match the exact duty point and site conditions:

• NM4-104B — 109 HP at 2200 RPM, UL-rated reduced-speed engine for 500 GPM low-pressure duties (99–161 PSI); longest engine life and lowest noise
• NM4-108B — 117–121 HP at 2950 RPM, for 750 GPM low-pressure 50Hz duties (164–175 PSI)
• NM6-110B — 148–153 HP at 2950 RPM, the standard 50Hz diesel selection for 750 GPM mid-range duties (180–215 PSI)
• NM6-110E — 192 HP at 2900 RPM, for 750 GPM higher-pressure 50Hz duties (210–245 PSI)
• NM6-110D — 239–268 HP at 2900 RPM, for 750 GPM high-pressure 50Hz duties (245–295 PSI)
• NM6-108E — 335 HP at 2950 RPM, for the highest-pressure 50Hz duties at 750 GPM (275–295 PSI) and 1000 GPM extension

Diesel packages include engine-driven cooling, starting batteries, and engine controller matched per NFPA 20. Note: diesel drive is available at 50Hz (2950/2200 RPM) duty points only; 60Hz (3550 RPM) duty points are served by electric motor drive.

Fire protection projects often require technical documents for consultant approval and installation. NMFIRE provides project-specific engineering support.

Standard Documents:

• Factory Test Report — including the pump performance curve
• Pump Drawings — outline and dimensional drawings

For skid-mounted or containerized packages, or any other document requirements, please contact us to discuss.

A horizontal split case fire pump has a casing split along the shaft centerline. Lifting the upper casing half exposes the impeller, wear rings, and shaft for inspection or parts replacement — without disconnecting the suction or discharge piping. The impeller is supported between two bearings, giving smooth, stable operation across a wide flow range. The NMFIRE SCF125-80-350 applies this design to the 500–1000 GPM range with UL Listing and FM Approval per NFPA 20.

UL (Underwriters Laboratories) Listing and FM (FM Approvals) certification are two independent third-party certifications verifying that a fire pump meets the applicable standards (such as UL 448 and FM 1311). Both are widely accepted by fire protection consultants, insurers, and authorities having jurisdiction in export markets. Many projects specify either one; some require both. The SCF125-80-350 carries both UL Listing and FM Approval, giving maximum flexibility for consultant approval and insurance acceptance on international projects.

The SCF125-80-350 covers rated flows of 500, 750, and 1000 GPM, with pressure ratings from 99 to 308 PSI (head 70–217 m). At the 750 GPM duty point, 50Hz operation (2950 RPM) delivers 164–295 PSI while 60Hz operation (3550 RPM) reaches 251–308 PSI. The 1000 GPM extension is available at 50Hz only. Driver options span ODP/TEFC electric motors from 100 to 250 HP and six diesel engines from 109 to 335 HP. The full selection table and performance curves for each flow/pressure/speed combination are available on request.

Sizing starts from the hydraulic calculations of the sprinkler or standpipe system: the required flow (GPM) at the most demanding point plus hose stream allowance, and the pressure needed to overcome elevation, friction losses, and required residual pressure, minus available municipal supply pressure. The selected pump must then meet the NFPA 20 performance criteria: at 150% of rated flow, discharge pressure must be ≥65% of rated pressure; at shut-off, pressure must not exceed 140% of rated. NMFIRE engineering can verify your duty point against the SCF125-80-350 selection table and issue a project-specific performance curve for consultant approval.

Horizontal split case pumps are the most common fire pump type: easy to service in place, and suitable for medium to high flow duties (the SCF125-80-350 covers 500–1000 GPM with pressure up to 308 PSI). End suction pumps offer a simple, economical layout for lower duties. Vertical inline pumps have the most compact footprint for space-limited plant rooms and retrofits. All three types are available from NMFIRE with UL Listed and FM Approved certification per NFPA 20. Selection depends on project flow, available space, and maintenance strategy.

The SCF125-80-350 has the most diesel engine options in the SCF range because its duty points span a very wide pressure band (99–308 PSI) at three flow rates and three speeds, each requiring different shaft power. Rather than oversizing a single engine for all duties — which wastes fuel and cost — NMFIRE matches the engine to the exact duty point: NM4-104B (109 HP at 2200 RPM) for reduced-speed low-pressure duties, NM4-108B (117–121 HP) for low-pressure 50Hz, NM6-110B (148–153 HP) for mid-range, NM6-110E (192 HP) for higher-pressure, NM6-110D (239–268 HP) for high-pressure, and NM6-108E (335 HP) for the highest-pressure 50Hz duties and 1000 GPM extension. This also gives margin to absorb altitude and temperature derating — if the standard engine derates below the required power at site conditions, the next model up is available without changing the pump.

The 2200 RPM speed is a diesel-engine-only, UL-rated operating mode available for 500 GPM duty points at 99–161 PSI. Running the engine at reduced speed (2200 RPM instead of 2950 RPM) extends engine life, reduces mechanical noise, and lowers fuel consumption — important for sites with continuous standby operation or noise-sensitive environments such as residential-adjacent pump rooms. The NM4-104B engine (109 HP) is paired to this speed. Note that 2200 RPM duties are UL-rated only (not FM); FM-rated duties require 2950 or 3550 RPM operation.

Yes. The SCF125-80-350 extends to 1000 GPM at 50Hz (2950 RPM), with pressure from 164 to 295 PSI and shaft power up to 257 HP. This makes it suitable for large industrial fire water systems — power plants, refineries, mining complexes — that exceed the 750 GPM rating without needing a larger pump model. At 60Hz (3550 RPM), the maximum rated flow is 750 GPM. For projects requiring 1000 GPM at 60Hz, NMFIRE offers larger SCF series models. The 1000 GPM duty point is available with both electric motor and diesel engine drive at 50Hz.

A 750 GPM fire pump at 164–295 PSI is a standard duty for high-hazard industrial occupancies: mining and mineral processing facilities (a frequent requirement in Uganda and across Africa), power generation plants, oil and gas terminals, cement factories, and large manufacturing complexes. The high-pressure characteristic of the SCF125-80-350 matches projects where deluge systems, monitors, and standpipes demand substantial residual pressure at high flow. For even larger systems, the 1000 GPM extension at 50Hz covers the most demanding industrial fire water duties from the same pump model.

The SCF125-80-350 pump unit itself comprises the horizontal split case pump and its electric motor or diesel engine. For projects requiring a complete fire pump system, NMFIRE can configure packages that add a UL/FM listed fire pump controller, a jockey pump for pressure maintenance, and a pressure relief valve where required. Delivery options include conventional plant room installation, a skid-mounted fire pump system with pre-piped pump and jockey pump on a common base, and a fully containerized fire pump station pre-assembled for plug-and-play site connection. Package scope is configured per NFPA 20 and project requirements.

Yes. NMFIRE fire pump packages are designed according to NFPA 20 requirements. The SCF125-80-350 horizontal split case model is UL Listed and FM Approved. Each pump is factory performance tested per NFPA 20 including shut-off pressure verification (max 140% of rated), rated flow testing, and 150% rated flow verification at no less than 65% of rated pressure.

Yes. Factory test reports including pump performance curves, together with pump outline and dimensional drawings, are provided as standard technical documents. For skid-mounted or containerized packages, or any other document requirements, please contact us to discuss. Third-party witness testing at our fire pump test facility can also be arranged per project requirements.