ESF150/40G UL/FM Horizontal End Suction Fire Pump 2000 GPM @ 98–163 PSI Designed For NFPA 20 Fire Protection Systems

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 engine 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.

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 end suction fire pump takes suction on the horizontal axis through the casing eye and discharges vertically from the top of the casing. Compared with a horizontal split case pump, the end suction layout is simpler, more compact, and more economical — well suited to large firewater duties. The NMFIRE ESF150/40G delivers 2000 GPM at 98–163 PSI in this format, UL Listed and FM Approved per NFPA 20, with a back pull-out design that allows the rotating assembly to be serviced without disturbing the piping.

Horizontal split case pumps split the casing horizontally, so internal parts are serviced by removing the top half without disturbing piping; they are typically used for medium to high flow duties. End suction pumps have a single-piece casing with suction on the axis and discharge on top — the most compact and economical layout for small to medium duties such as 50–750 GPM, and available from NMFIRE in high-flow ratings up to 2500 GPM. Vertical inline pumps mount the motor above the pump with both nozzles on the same vertical centerline, minimizing footprint in very tight plant rooms. All three types are available from NMFIRE with UL Listed certification per NFPA 20. Selection depends on project flow, available space, and installation constraints.

The ESF150/40G is rated at 2000 GPM, with selectable pressure ratings from 98 to 163 PSI (head 69–115 m) at 2100 RPM. Maximum shaft power is 348 HP / 259.5 kW at the 163 PSI duty point. Each duty point is driven by a matched diesel engine (208–412 HP) selected for the site's ambient and altitude conditions. The full selection table and performance curves are available on request.

The ESF150/40G is configured exclusively as a diesel-driven fire pump. At 2000 GPM and up to 348 HP shaft power, this duty is typical of mining and heavy industrial sites — locations where grid power is often unstable or unavailable. A diesel engine driver (208–412 HP) keeps the firewater system fully independent of the mains supply per NFPA 20, which is why South African and wider African mining projects commonly specify diesel drive at this duty. For grid-reliable sites requiring electric drive at similar flows, NMFIRE offers the ESF150/32 (1500 GPM) and ESF200/50G (2500 GPM, electric or diesel).

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 at the topmost outlet, 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 (zero flow), pressure must not exceed 140% of rated. NMFIRE engineering can verify the duty point against the ESF150/40G selection table and issue a project-specific performance curve for consultant approval.

The ESF150/40G pump unit itself comprises the end suction pump and its diesel engine driver. For projects requiring a complete fire pump system, NMFIRE can configure packages that add a UL 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.

A 2000 GPM diesel-driven fire pump is a typical specification for mining operations — processing plants, shaft areas, conveyor corridors, workshops — and for heavy industrial sites such as smelters and bulk storage terminals, especially where grid power is unreliable. The ESF150/40G is engineered for exactly this profile: high flow, diesel independence, and robust construction for dusty, high-ambient remote environments. For grid-reliable sites, NMFIRE offers electric-driven end suction models at 1500 GPM (ESF150/32) and 2500 GPM (ESF200/50G).

Yes. NMFIRE fire pump packages are designed according to NFPA 20 requirements. The ESF150/40G horizontal end suction model is UL Listed / 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.