FPS MH Series (70-90 GPM) Horizontal Multi-Stage Pumps

Features

• Compact close-coupled design; robust and rust resistant; superior efficiency and performance
• Heavy-duty oversized motor shaft
• Impellers and diffusers made of 300 series stainless steel for maximum durability
• Easy maintenance
• Robust ball bearing fitted into the motor bracket for greater longevity
• Flexible application baseplate
• Floating neck ring in PPS
• Strong and leak-proof ball bearing fitted in the motor
• Pumping of clear non-loaded fluids
• Mechanical seal carbon/silicon carbide/EPDM
• Three-phase, 2-pole motor efficiency class IE3; asynchronous, TEFC (Totally Enclosed, Fan-Cooled); P55 protection motor, insulation class F

Applications

• Small domestic and industrial systems / domestic water supply
• Water distribution / pressure boosting
• Irrigation / gardening / sprinklers / rainwater collection
• Industrial plants / wash-down unit
• Cooling and chilling / heating and conditioning / air conditioning systems
• Other various installations

Pump Specifications

• Capacities up to 145 gpm
• Heads up to 280 ft TDH
• NPT threaded connections for inlet and outlet
• Maximum working pressure: 145 psi
• Maximum ambient temperature: 104 °F
• Liquid tempreature range: 14 - 194 °F
• Hydraulic characteristics are guaranteed, according to ISO standard 9906:2012, grade 3B

Ordering Information

Family Curve

This section presents the family curve for the MH Series pumps. The graph displays the relationship between flow rate and head. The X-axis represents flow rate, shown in cubic meters per hour (M³/H) and US gallons per minute (USGPM), ranging from 0 to 35 M³/H and 0 to 160 USGPM. The left Y-axis indicates head in meters (METERS), from 0 to 100 meters, while the right Y-axis shows head in feet (FEET), from 0 to 320 feet. Two distinct curves are plotted, labeled "70MH" and "90MH", illustrating the performance characteristics of these pump series across different flow rates.

Performance (70 GPM Models)

This section details the performance characteristics for the 70 GPM models (70FMH2, 70FMH3, 70FMH4). It includes three graphs:

• Total Head vs. Flow: Plots Total Head (in feet and meters) against Flow Rate (in m³/h and US gpm). The curves show how head decreases as flow rate increases for each model.
• Efficiency vs. Flow: Plots Efficiency (in %) against Flow Rate (in m³/h). This graph illustrates the optimal operating range for each pump model based on efficiency.
• NPSH vs. Flow: Plots Net Positive Suction Head (NPSH) (in feet and meters) against Flow Rate (in m³/h and US gpm). This data is crucial for preventing cavitation.

A table provides specific performance data points for these models across various flow rates, including Total Head (ft) and Shut Off (PSI).

Performance (90 GPM Models)

This section details the performance characteristics for the 90 GPM models (90FMH2, 90FMH3). It includes three graphs:

• Total Head vs. Flow: Plots Total Head (in feet and meters) against Flow Rate (in m³/h and US gpm). The curves show how head decreases as flow rate increases for each model.
• Efficiency vs. Flow: Plots Efficiency (in %) against Flow Rate (in m³/h). This graph illustrates the optimal operating range for each pump model based on efficiency.
• NPSH vs. Flow: Plots Net Positive Suction Head (NPSH) (in feet and meters) against Flow Rate (in m³/h and US gpm). This data is crucial for preventing cavitation.

A table provides specific performance data points for these models across various flow rates, including Total Head (ft) and Shut Off (PSI).

Dimensions

This section provides dimensional data and diagrams for the MH Series pumps.

Dimensional Diagrams:

4 HP Model: A side view and end view diagram illustrates the pump's dimensions. Key measurements include overall length (A), flange to end dimension (F), diameter (ØB), height (H), and motor height (H1). Inlet and outlet connections are shown as 1-1/2" NPT. Specific lengths L1 and L2 are also indicated.

5.5 HP & 7.5 HP Models: Similar side and end view diagrams are provided. Dimensions A, F, ØB, H, H1, L1, L3, M, N, and N1 are labeled. The diagrams show 1-1/2" NPT connections for inlet and outlet. The diagrams also indicate specific lengths for L1, L2, L3, and M.

Main Components

This section lists the main components of the MH Series pumps, their reference numbers, descriptions, and materials. Replacement parts are available to order.

Exploded View Diagram: An exploded view diagram visually represents the pump assembly, showing the relative positions of all numbered components. The diagram details the arrangement of parts such as the pump casing (20.00), motor bracket (20.01), seal housing (20.02), support foot (20.04), inlet cover (20.07), flange (20.08), motor housing (30.00), bearing housing (30.01), fan (30.02), impellers (50.00), and stage housings (40.00, 40.01, 40.03, 40.04).