Technical Specifications

Reference Model	7121-3
Product Type	Brushed mini diaphragm pump
Flow Rate	300 mL/min at atmospheric pressure
Pump Head Material	PP
Diaphragm Material	EPDM or FKM
Hose Connector	4 mm inner diameter silicone hose
Pressure Range	Output pressure ≥200 kPa; negative pressure ≤ -80 kPa in liquid medium
Rated Power	7 W
Rated Voltage	12 V DC or 24 V DC
Applicable Medium	Water, weak acid, weak base, etc.
Service Life	3,000 h with brush motor
Safety Protection Current	N/A
Rated Current	12 V: ≤0.5 A; 24 V: ≤0.25 A

Miniature Diaphragm Pump · Brushed 7121 Series

7121-3 Brushed Mini Diaphragm Pump for Liquid and Gas Transfer

The Keyto 7121-3 brushed mini diaphragm pump is designed for compact liquid and gas transfer where a brush motor configuration is preferred.

It provides 300 mL/min flow, 12 V/24 V options, PP pump head, EPDM/FKM diaphragm choices, and 3,000-hour brush motor service life for medical, laboratory, and environmental equipment.

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Why Choose the with-brush-7121-3 Miniature Diaphragm Pump?

This model is built for equipment designers who need compact size, stable fluid control, material compatibility, and reliable OEM integration.

Compact Brushed Motor Option

Brush motor configuration offers an alternative for projects that require cost-effective compact pumping.

300 mL/min Transfer

Supports liquid suction, cleaning, waste discharge, mixing, and compact gas/liquid transfer.

Pressure and Suction Capability

Output pressure ≥200 kPa and negative pressure ≤ -80 kPa support stable transfer in compact systems.

Material Options

PP pump head with EPDM or FKM diaphragm options supports different fluid compatibility needs.

12 V / 24 V Integration

Voltage options help fit different OEM power designs.

Suitable for Equipment Integration

Designed for medical, laboratory, environmental, and analytical equipment applications.

Typical Applications

Compact liquid transfer modules
Medical device fluid handling
Laboratory equipment
Environmental monitoring systems
Cleaning and waste discharge modules
OEM instruments requiring brushed motor configuration

Material and Medium Compatibility

PP pump head for compact fluidic structures
EPDM or FKM diaphragm options for different fluid requirements
4 mm inner diameter silicone hose connection
Suitable for water, weak acid, and weak base solutions under validated conditions
Confirm compatibility for special fluids and long-duty-cycle use

Model Selection Notes

Choose the brushed 7121-3 when you need a compact 300 mL/min pump with brush motor configuration. Choose the BLDC 7121-3 if longer service life and lower maintenance are more important.

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Frequently Asked Questions

What is the brushed 7121-3 pump used for?

It is used for compact gas/liquid transfer, liquid suction, cleaning, waste discharge, and mixing in OEM instruments.

What is the flow rate of the brushed 7121-3?

The brushed 7121-3 provides 300 mL/min flow at atmospheric pressure.

How long is the service life of the brush motor version?

The brush motor version supports 3,000 hours of service life under specified conditions.

What materials are available?

The pump head is PP, and diaphragm options include EPDM or FKM depending on fluid compatibility needs.

How is it different from the BLDC 7121-3?

The brushed version uses a brush motor with 3,000-hour service life, while the BLDC version supports up to 10,000 hours and is better for longer-running systems.

Need help selecting a miniature diaphragm pump?

Share your flow rate, pressure, medium, voltage, tubing, duty cycle, and installation requirements. Keyto can help evaluate a suitable pump configuration for your system.

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