OTM AUTOMATIC SELF-PRIMING WATER PUMP

Component

Pump Body: Cast Iron, with coating and 304SS insert
Pump Support: Cast Iron, with coating and 304SS insert if request
Motor Housing: Aluminum Alloy
Impeller: Brass
Motor Shaft: Carbon Steel, Carbon Steel if request

Operating Condition

Liquid Temperature up to 60 ℃
Ambient Temperature up to 40 ℃
Total Suction Lift up to 9 m
Function: Self-Priming
Model A: Automatic Version

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

Product Summary

OTM automatic self-priming pumps are compact surface pumps for clean-water transfer, domestic supply, garden irrigation, water-tower feeding, and automatic pressure boosting. Seven models range from 0.15 kW to 1.1 kW, with maximum heads from 24 m to 60 m and flow capacities from 1.7 m³/h to 4.5 m³/h. Cast iron hydraulic parts, a brass impeller, external ventilation, IP44 motor protection, and up to 9 m suction lift provide practical data for fixed installations. Models marked A include a pressure-switch version for demand-based operation.

Detailed Description

An automatic self-priming pump is useful when the water source sits below pump level or when daily use involves frequent starts and stops. The OTM automatic self-priming pump series is intended for clean water and liquids that are non-aggressive to its listed materials. Its hydraulic arrangement supports water lifting from shallow sources within the rated suction condition, while the pressure-switch option helps the pump respond to water demand in domestic systems. This makes the series suitable for household supply lines, garden taps, storage tanks, small irrigation zones, and clean-water transfer duties where a compact surface-mounted pump is preferred. Required flow, elevation difference, pipe length, fittings, and source water level influence the final result.

Key Features

The OTM automatic self-priming pump combines a cast iron pump body and support with a brass impeller for routine clean-water duties. The aluminum alloy motor housing supports heat dissipation, and external ventilation assists cooling during extended runs. Class B insulation, IP44 protection, and a built-in thermal protector add practical motor safeguards. Most models use 1 inch × 1 inch connections, while the 1OTM1100(A) uses 1½ inch × 1½ inch connections. Automatic A versions are designed for installations that need pressure-switch control instead of manual switching.

Technical Parameters

The model table provides core selection data for the OTM automatic self-priming pump family. Power ranges from 0.15 kW / 0.2 HP for 1OTM150(A) to 1.1 kW / 1.5 HP for 1OTM1100(A). Maximum flow ranges from 1.7 m³/h to 4.5 m³/h, and maximum head ranges from 24 m to 60 m. All listed models have a maximum suction lift of 9 m. Operating limits list liquid temperature up to 60 ℃ and ambient temperature up to 40 ℃. Voltage options include 220V/50Hz as standard, with 110V/60Hz and 220V/60Hz on request. Weight and dimension data support installation planning.

Engineering Advantages

A self-priming water pump is designed to manage air in the suction line during priming, which can simplify use where the pump is positioned above a shallow water source. The brass impeller suits the intended clean-water service, while the cast iron body gives the hydraulic section a rigid mounting base. The thermal protector monitors abnormal motor heat conditions, and continuous S1 duty identifies the motor for continuous operation within rated conditions. Correct pipe sizing and a sealed suction line remain important for the stated performance range.

Applications

Typical OTM automatic self-priming pump applications include domestic water supply from storage tanks, shallow-source lifting, garden and landscape irrigation, water-tower feeding, and small automatic boosting systems. The series can also support clean-water transfer in sheltered light commercial locations where the required head and flow fall within the published data. It is not intended for abrasive particles, sewage, or chemically aggressive liquid. Installation should be protected from adverse weather and follow suitable electrical and plumbing practices.

Commercial Value

For B2B buyers, the OTM automatic self-priming pump series offers a structured range across seven motor sizes. This supports selection for different household and small-project requirements while maintaining one product family. Shared clean-water positioning, standard voltage options, pressure-switch variants, and familiar connection sizes can help distributors communicate the range to installers and end users. Published specifications make it easier to compare head, flow, power, weight, and dimensions during procurement planning.

FAQ

Q:What water can the OTM automatic self-priming pump handle?

A:The series is specified for clean water and liquids that are non-aggressive to the listed materials.Abrasive particles and unsuitable liquids can affect pump components.

Q:What does the A designation mean?

A:Model A is an automatic version intended for pressure-switch control in suitable installations. How should a model be selected? Compare required flow, total head, suction condition, pipe losses, and electrical supply with the model table.

Q:Can the pump be installed outdoors?

A:Use enclosed installation or protection from adverse weather.