Technical Specifications

Reference Model	7121-6
Product Type	Micro diaphragm gas/liquid pump
Flow Rate	600 mL/min at atmospheric pressure
Pump Body Material	PP
Diaphragm Material	EPDM, FKM
Port Size	4 mm ID silicone tubing
Pressure Range	Output ≥200 kPa; suction ≤ -80 kPa in liquid state (specific parameters under different conditions, please refer to the Keyto specification)
Rated Power	7 W
Rated Voltage	12 V DC or 24 V DC optional
Applicable Medium	Water, weak acid and weak base solutions, etc.
Life Span	10,000 hrs with BLDC motor; PWM optional
Safety Current	N/A or 1.2 A depending on configuration
Rated Current	12 V: ≤0.36 A, 24 V: ≤0.16 A, or 12 V: ≤0.5 A, 24 V: ≤0.25 A

Miniature Diaphragm Pump · 7121 Series

7121-6 Micro Diaphragm Pump for Liquid and Gas Transfer

The Keyto 7121-6 is a micro diaphragm gas/liquid pump designed for compact suction, transfer, cleaning, waste discharge, mixing, and vacuum creation in automated instruments.

Compared with the 7121-3, this model provides a higher 600 mL/min flow rate while keeping the same compact integration advantages, 12 V/24 V BLDC options, and EPDM/FKM diaphragm choices.

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Why Choose the 7121-6 Miniature Diaphragm Pump?

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

Higher Flow in Compact Size

600 mL/min flow supports faster liquid transfer, cleaning, and waste discharge in compact systems.

Gas and Liquid Transfer Capability

Suitable for gas/liquid transfer use cases in medical, laboratory, and environmental instruments.

Long BLDC Service Life

Brushless motor configuration supports up to 10,000 hours of service life for long-running equipment.

Material Flexibility

EPDM and FKM diaphragm options help support different fluid compatibility requirements.

12 V / 24 V Integration

Voltage options and PWM configuration help simplify integration with different system control architectures.

Low Noise and Low Vibration

The 7121 series is designed for stable operation with reduced noise and vibration.

Typical Applications

IVD and medical device fluid handling
Analytical instruments
Environmental monitoring equipment
Laboratory automation systems
Cleaning, suction, and waste discharge modules
Compact OEM gas/liquid transfer systems

Material and Medium Compatibility

PP pump body for compact fluidic structures
EPDM and FKM diaphragm options for different fluid requirements
Suitable for water, weak acid, and weak base solutions
4 mm ID silicone tubing connection for system integration
Confirm compatibility for special fluids, solvents, or cleaning agents before final selection

Model Selection Notes

Choose the 7121-6 when you need higher flow than the 7121-3 while maintaining compact size and BLDC life. If high pressure is the main requirement, compare it with the 7521-3.

miniature diaphragm pumps 7121-3 micro diaphragm pump 7521-3 high pressure diaphragm pump 7122 dual-head mini diaphragm pump

Frequently Asked Questions

How is 7121-6 different from 7121-3?

The 7121-6 provides a higher nominal flow rate of 600 mL/min, while 7121-3 provides 300 mL/min. Choose based on required flow, space, and duty cycle.

Can the 7121-6 pump handle both gas and liquid?

Yes. The 7121-6 is designed for gas/liquid transfer use cases, including suction, cleaning, waste discharge, mixing, and vacuum creation.

What voltage options are available?

The 7121-6 supports 12 V DC and 24 V DC options. PWM control is also available with selected BLDC configurations.

What diaphragm materials can be selected?

EPDM and FKM diaphragm options are available. The right material should be selected based on fluid compatibility and operating conditions.

Is the 7121-6 suitable for long-life applications?

Yes. The BLDC configuration supports up to 10,000 hours of service life, which helps reduce maintenance needs.

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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