On April 8, 2026, a client from the pump and valve industry visited Huizhou DOIT Precision Products Co., Ltd.. The two parties engaged in deep technical discussions regarding yield rate improvement and quality assurance systems. DOIT’s core quality and R&D teams participated in the entire process, performing on-site inspections of finished products based on the client’s project drawings.
High-Performance Sealing for Fluid Control
Sealing products for pumps, valves, and fluid control are among DOIT’s core businesses. Key products include:Duckbill valves、Umbrella valves、Diaphragms、Piston bodies.
These products feature precise pressure opening/closing, tear resistance, and chemical corrosion resistance. They are widely used in high-end home appliances, water treatment, and medical/industrial micro-pumps. DOIT components meet strict requirements for media resistance, cleanliness, and zero extractables, while complying with RoHS/REACH environmental standards.
Case Study: Solving Media Swelling Issues
A recent client faced persistent issues with sealing failure caused by volume expansion after contact with swelling media in their water pumps. DOIT optimized the EPDM material formula, successfully resolving the swelling problem and reducing the compression set rate. This improvement significantly extended the product service life, creating tangible value for the client.
To address common industry challenges such as unstable flow control, structural rupture, and environmental compliance risks, DOIT has developed a mature solution set:
- Optimizing sealing structure strength through corrected wall thickness design ratios.
- Strictly controlling production parameters by adjusting material hardness based on flow test data.
- Developing environment-specific formulas and organizing production in dedicated environmental control workshops to ensure global compliance.
Technical Breakthroughs in Umbrella Valves
In 2025, DOIT established a research group to solve standardization issues for umbrella valves. The team overcame technical difficulties such as 2mm middle plate deformation, broken pin removal, and waste clearance. By unifying the standard dimensions of the valve neck and sphere, they laid the foundation for standardized production.
For these achievements, the team received the Breakthrough Award at the 2026 Annual Meeting. Leveraging its technical advantages and commitment to customer-centric innovation, DOIT continues to lead the way in the pump and valve sealing industry.