What Materials Used for Micro Diaphragm Pumps

Micro diaphragm pumps rely on carefully chosen materials to ensure efficiency, durability, and compatibility with various fluids. The key components and their typical materials are as follows.

The diaphragm :It is often made of EPDM rubber for its flexibility and resistance to water, mild chemicals, and temperature variations, suitable for general-purpose use. For corrosive fluids, PTFE (Teflon) is preferred, as it’s inert to most chemicals but less flexible. Silicone rubber is used in medical or food applications due to its non-toxic, high-purity nature.

Housings and Casings  : commonly use plastic polymers like PP (polypropylene) or PVDF (polyvinylidene fluoride). PP is cost-effective and resists many chemicals, while PVDF handles harsher substances and higher temperatures, ideal for industrial settings. Some high-end models use stainless steel for added strength and corrosion resistance.

Rotating Shaft :  Constructed from 4Cr13 (stainless steel variant), it offers corrosion resistance and strength to withstand rotational forces.

Screws : Are use carbon steel for general fastening, balancing cost and basic strength.

DC brush Motor: The core driver, though its internal materials vary, it powers the pump’s operation. The bracket material is unspecified but likely a metal or rigid plastic for motor support.

This material selection balances fluid compatibility, mechanical performance, and cost - effectiveness, tailored to the pump’s operational needs. Each material contributes to the pump’s ability to handle fluid transfer reliably while maintaining structural integrity.