Technical Specifications

Reference Model	7521-3
Product Type	High-pressure miniature diaphragm liquid pump
Flow Rate	≥0.30 L/min under atmospheric pressure
Pump Body Material	PPS, customizable
Diaphragm Material	EPDM, customizable
Port Size	4 mm ID silicone tubing
Pressure Range	Output ≥0.6 MPa; suction ≤ -0.04 MPa in liquid state (specific parameters under different conditions please refer to the Keyto specification)
Rated Power	<12 W
Rated Voltage(DC)	12V or 24V optional
Applicable Medium	Water, weak acid and weak base solutions, etc.
Life Span	10,000 h
Safety Current	2.1 A
Rated Current	<1 A or <0.5 A optional

Miniature Diaphragm Pump · High Pressure 7521 Series

7521-3 High-Pressure Miniature Diaphragm Liquid Pump

The Keyto 7521-3 is a high-pressure miniature diaphragm liquid pump designed for compact fluid control systems that require stable pressure, clean transfer, and reliable sealing.

With ≥0.30 L/min flow, ≥0.6 MPa output pressure, PPS pump body, EPDM diaphragm, and 12 V/24 V options, it is suitable for analytical, medical, environmental, and laboratory equipment integration.

Request Engineering Support Review Key Parameters

Why Choose the 7521-3 Miniature Diaphragm Pump?

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

High-Pressure Liquid Transfer

Output pressure ≥0.6 MPa supports compact systems that require stable liquid pressure and controlled transfer.

Corrosion-Resistant Structure

PPS pump body and EPDM diaphragm help support water and weak acid/base solution handling under validated conditions.

Clean, Oil-Free Operation

The diaphragm structure helps provide clean liquid transfer without oil contamination in the fluid path.

Compact OEM Integration

Small structure, 12 V/24 V options, and 4 mm ID tubing support integration into space-limited instruments.

Long Service Life

10,000-hour service life supports stable use in equipment that needs long-term operating reliability.

Low Vibration and Noise

Designed for reduced vibration and minimal noise in analytical, environmental, and medical instruments.

Typical Applications

High-pressure liquid transfer in compact instruments
Analytical and laboratory equipment
Environmental monitoring systems
Medical device fluid control
Reagent and weak acid/base solution transfer
OEM fluidic modules requiring stable pressure

Material and Medium Compatibility

PPS pump body for high-pressure liquid handling requirements
EPDM diaphragm for water and weak acid/base solutions
4 mm ID silicone tubing connection for system integration
Suitable for water, weak acid, and weak base solutions under validated conditions
For special fluids or cleaning agents, confirm material compatibility before final selection

Model Selection Notes

Choose the 7521-3 when your system requires a compact liquid diaphragm pump with higher pressure capability. If your project needs higher flow but lower pressure, compare it with the 7121-6 or 7122 models.

miniature diaphragm pumps 7121-6 micro diaphragm pump 7122 dual-head mini diaphragm pump 7102 miniature air vacuum pump

Frequently Asked Questions

What is the 7521-3 miniature diaphragm pump used for?

The 7521-3 is designed for high-pressure liquid transfer in compact OEM instruments, including analytical, medical, environmental, and laboratory equipment.

What pressure can the 7521-3 provide?

It provides output pressure ≥0.6 MPa and suction ≤ -0.04 MPa in liquid state. Final performance should be verified under the actual medium, tubing, and system conditions.

What wetted materials are used?

The standard configuration uses a PPS pump body and EPDM diaphragm. Material compatibility should be checked against the target medium before final integration.

Does the 7521-3 support both 12 V and 24 V systems?

Yes. The 7521-3 supports 12 V DC and 24 V DC options for different equipment power architectures.

When should I choose 7521-3 instead of 7121-3 or 7121-6?

Choose 7521-3 when high output pressure is more important than flow rate. Choose 7121-3 or 7121-6 when lower pressure and compact gas/liquid transfer are sufficient.

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.

Contact Keyto