This is a diaphragm for automotive solenoid pumps, featuring an overall black circular shape with a smooth surface and regular circular outline. One side of its middle part is smooth and flat, while the other side has a circular protrusion in the center; the edge is equipped with a sealing structure to fit the internal components of the solenoid pump. Made of HNBR material, it can achieve corresponding functions through its own elastic deformation during the operation of the solenoid pump. As a critical component of
Automotive Sealing Assemblie and
Automotive Sealing Solution for fluid control systems, it aligns with the performance requirements of
Precision automotive seal in automotive powertrain and cooling systems.
Product Features
1. Functions
The automotive solenoid pump diaphragm is a core component for solenoid pumps to realize the transmission of liquids (such as fuel, coolant, etc.) or pressure control.
1)Power Transmission and Fluid Propulsion: When the solenoid pump is energized, the driving force generated by the internal electromagnetic components acts on the diaphragm, causing it to produce regular reciprocating elastic deformation (such as contraction and expansion). This deformation changes the volume and pressure of the pump chamber: when the diaphragm expands, the volume of the pump chamber increases and the pressure decreases, drawing external liquid into the chamber; when the diaphragm contracts, the volume of the pump chamber decreases and the pressure increases, squeezing the liquid into the output pipeline. Ultimately, this achieves stable liquid transmission, providing continuous fluid power for automotive-related systems (such as fuel supply and cooling circulation). This functional performance complements the fluid management needs of
Automotive Seal in high-pressure automotive fluid circuits.
2)Sealing and Leakage Prevention: The edge of the diaphragm must fit tightly with the inner wall of the solenoid pump chamber to form a reliable sealing structure. During the reciprocating movement, it can not only prevent the liquid in the pump chamber from leaking through the gap between the diaphragm and the chamber wall but also avoid external air and impurities from entering the pump chamber. This ensures stable pressure inside the pump body, protects the internal components of the solenoid pump from fluid contamination, and maintains the normal working efficiency of the pump—meeting the strict leak-proof standards of Precision automotive seal and Automotive Sealing Assemblie.
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2. Required Characteristics
1)Excellent Elasticity and Deformation Recovery: It must have high elasticity and rapid deformation recovery capability, enabling it to continuously produce stable contraction/expansion movements under the high-frequency reciprocating drive of the solenoid pump. Moreover, it should not be prone to elastic fatigue or permanent deformation residues (such as "collapse" or "hardening") after long-term use, ensuring the stability of liquid transmission pressure and flow rate. This elastic performance is consistent with the dynamic sealing requirements of Automotive sealing solution in high-cycle automotive systems.
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2)Reliable Sealing Performance: The edge size must be precisely matched with the pump chamber, and the material itself must have good conformability. Even under high-frequency movement and pressure changes, it can always maintain close contact with the inner wall of the pump chamber without gaps or leakage, avoiding the risk of reduced pump efficiency or fluid leakage caused by sealing failure. This sealing reliability aligns with the standards of
Automotive Connector Seals and
Vehicle Connector Waterproof Parts for automotive fluid sealing.
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3)Oil Resistance / Fluid Corrosion Resistance: The liquids transmitted by automotive solenoid pumps are mostly fuel (gasoline, diesel), coolant, etc. The diaphragm material must be able to withstand long-term immersion and corrosion of these fluids without swelling, cracking, aging, or material decomposition. This ensures stable performance under complex automotive working conditions (such as high temperature and vibration), complying with the corrosion resistance requirements of Automotive Seal in harsh fluid environments.
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4)High-Temperature Resistance and Anti-Aging: The installation environment such as the automotive engine compartment has a high temperature (which may reach 80-120℃ or even higher), and it is in an environment with vibration and humidity changes for a long time. The diaphragm must have excellent high-temperature resistance (no softening or deformation) and anti-aging ability to extend its service life and avoid functional failure caused by high-temperature aging. This environmental adaptability meets the durability standards of Precision Seals for? high-temperature automotive sealing components.
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5)Sufficient Mechanical Strength and Toughness: Under high-frequency reciprocating movement and pressure impact, the diaphragm must have a certain tensile strength and toughness, not easily breaking or being damaged due to repeated stretching and squeezing. At the same time, it can withstand the vibration impact during vehicle driving and maintain structural integrity.?
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6)High Dimensional Precision: As a core matching component of the solenoid pump, the dimensions of the diaphragm (such as diameter, thickness, and edge curvature) must strictly comply with design standards to ensure precise assembly with the pump chamber and drive components. This avoids movement jamming, poor sealing, or reduced transmission efficiency caused by dimensional deviations—consistent with the manufacturing precision of Precision automotive seal and Automotive Sealing Assemblie.
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