When your application demands a perfect balance of mechanical strength, chemical resistance, and reliable sealing, the DN13 Plastic Check Valve delivers exceptional performance. Engineered with a POM (Polyoxymethylene) body, a 304 stainless steel spring, and a choice of high-quality seals, this non-return valve is designed for demanding environments where durability and precision are critical.
Unlike standard plastic valves, the DN13 model combines the mechanical strength of engineering-grade POM with the corrosion resistance of a stainless steel spring, resulting in a valve that offers superior longevity, consistent cracking pressure, and excellent sealing performance across a wide range of media.
Key Features and Technical Specifications
Premium Material Selection
The DN13 Plastic Check Valve is constructed using carefully selected materials to ensure optimal performance in various applications.
Body Material: POM (Polyoxymethylene)
High Mechanical Strength: POM offers exceptional tensile strength, stiffness, and impact resistance, making it ideal for applications where the valve may experience pressure fluctuations or mechanical stress.
Excellent Dimensional Stability:
POM maintains its shape and sealing properties across a wide temperature range, ensuring consistent performance.
Low Friction Coefficient:
The smooth internal surface reduces flow resistance and minimizes the risk of particle adhesion or scaling.
Chemical Resistance:
POM provides good resistance to hydrocarbons, solvents, and many chemicals, making it suitable for fuel systems, industrial fluids, and various processing applications.
FDA Compliance:
Food-grade POM options are available for potable water and food processing applications.
Spring: 304 Stainless Steel
Corrosion Resistance: 304 stainless steel offers excellent resistance to oxidation, moisture, and a wide range of chemicals, ensuring the spring remains functional even in humid or corrosive environments.
Consistent Cracking Pressure:
The spring mechanism provides a reliable, repeatable opening and closing action, ensuring the valve responds predictably to changes in flow.
Durability:
304 stainless steel spring maintains its elasticity over thousands of cycles, offering long service life without fatigue.
Seal Options: EPDM, Silicone, NBR
Robust Construction and Design
Spring-Loaded Mechanism: Unlike simple gravity-based check valves, the DN13 uses a 304 stainless steel spring to ensure positive sealing even in horizontal or low-flow conditions. This makes it suitable for installations where orientation cannot be controlled.
Compact Footprint: The DN13 design maintains a small form factor, allowing installation in tight spaces, control panels, and equipment with limited access.
Low Cracking Pressure: Despite the spring mechanism, the valve is engineered to open at a low cracking pressure, minimizing energy loss and ensuring efficient operation even in low-flow systems.
Application:
The DN13 Plastic Check Valve is available with various connection styles to suit your installation needs:
Socket Ends: For solvent welding or adhesive bonding into plastic piping systems.
Threaded Ends: Standard 1/2" or 3/8" BSP/NPT threads for easy screw-in installation.
Hose Barbs: For push-on connection to flexible tubing, ideal for laboratory and medical equipment.
How It Works
The DN13 Plastic Check Valve operates automatically. When forward flow enters the valve, fluid pressure overcomes the 304 stainless steel spring force, pushing the internal poppet or ball off its seat. This allows fluid to pass through the valve. When forward flow stops or reverse flow occurs, the spring immediately returns the sealing element to the seat, creating a leak-tight seal and preventing backflow. The spring mechanism ensures reliable closure even at zero differential pressure.
Thanks to its robust material combination, the DN13 Plastic Check Valve is suitable for a diverse range of industries and applications:
Water Treatment and Purification
- Reverse osmosis (RO) systems
- Water softeners and filtration units
- Ultrapure water systems
- Potable water dispensing equipment
Chemical Dosing and Metering
- Chemical injection pumps
- Fertilizer and pesticide dosing systems
- Industrial chemical transfer lines
- Laboratory fluid handling equipment
Medical and Pharmaceutical
- Diagnostic equipment
- Fluid handling in analyzers
- Sterile fluid transfer systems
- Dental and surgical equipment
Food and Beverage Processing
- Beverage dispensing machines
- Food-grade fluid transfer
- Dairy processing equipment
- Brewing and bottling lines
The DN13 Plastic Check Valve represents the ideal solution for applications requiring a durable, corrosion-resistant, and highly reliable non-return valve. With its POM body providing mechanical strength, 304 stainless steel spring ensuring consistent closure, and a choice of EPDM, Silicone, or NBR seals for unmatched fluid compatibility, this valve is built to perform across water treatment, chemical dosing, oil and fuel systems, medical equipment, food processing, and industrial manufacturing. Choose the DN13 for precision engineering, long service life, and dependable backflow prevention.
