To ensure the proper selection, performance, and longevity of MTH Pumps products, please review the following maximum operating parameters. Applications exceeding these limitations may require consultation with MTH engineering for custom solutions or special materials.

General Performance Limits (Standard Product Ranges)

Parameter	Typical Range	Notes
Maximum Temperature	250°F (121°C)	May vary by model and material; consult factory for higher temp options.
Minimum Temperature	-20°F (-29°C)	Lower limits may require special seals and materials.
Maximum Inlet Pressure	150 PSI (10.3 bar)	Inlet pressures above this require special configurations.
Maximum Discharge Pressure	400 PSI (27.6 bar)	Depends on pump model and stage count.
Maximum Differential Pressure	350 PSI (24.1 bar)	Typical for multi-stage regenerative turbine models.
Maximum Flow Rate	60 GPM (13.6 m³/h)	Varies by model; MDT, T31, and specially configured units.
Maximum Viscosity	150 SSU (~32 cSt)	Higher viscosity fluids reduce performance; not ideal for viscous media.
Maximum Specific Gravity	1.2	Heavier fluids may require derating or custom builds.
Maximum Suction Lift	20 ft (6 m) when flooded or primed	Not self-priming; positive suction head recommended.
Minimum Flow Rate	~0.5 GPM (1.9 L/min)	Continuous low flow can lead to overheating; consult curve for each model.

Electrical and Motor Compatibility

Parameter	Specification	Notes
Voltage Options	115V, 208-230V, 460V, 575V (1ø & 3ø)	Standard NEMA configurations; IEC options available.
Motor Enclosures	TEFC, ODP, Explosion Proof, Washdown Duty	Application-specific; explosion-proof not standard.
Frequency	50/60 Hz	Check for performance de-rating on 50Hz systems.
Motor HP	1/3 thru 15 HP (close-coupled)up to 60 (flex-coupled	Larger motors available by special request.

Fluid Compatibility Considerations

Fluid Type	Limitation
Abrasive Fluids	Not recommended without custom wear-resistant components.
Slurries/Solids	Not suitable for fluids with solids > 100 microns or > 1% by volume.
Corrosive Fluids	Limited by material selection; 316SS, Bronze, or Alloy 20 options help.
High Vapor Pressure	Can cause cavitation; consult factory for solutions.
Flammable Fluids	Explosion-proof motors and seal isolation required.

Additional Design & Environmental Limits

Parameter	Specification
Installation Orientation	Horizontal standard; vertical mount may need custom bearing support.
Ambient Temperature Range	-20°F to 120°F (-29°C to 49°C)
Noise Level	≤ 80 dBA typical
Altitude Limit	Up to 6,000 ft (1,830 m) without derating

Important Notes

• Custom Solutions Available: MTH Pumps offers custom-engineered configurations for applications outside the limits listed above.

• Always Refer to Individual Pump Curves: This page provides general parameters. Performance limits can vary significantly across product lines (e.g., T31 vs. E51 vs. MDT).

• Consult MTH Engineering: For borderline or critical applications, contact our applications team to confirm compatibility.