POM Plastic Insert Check Valve Core | Spring-Loaded One-Way Non-Return Cartridge with EPDM O-Ring (8mm - 50mm) - Atradesen

POM Plastic Spring-Loaded Insert Check Valve Cores (One-Way Non-Return Cartridges)

Configure compact, inline backflow prevention inside your piping runs with our premium POM plastic insert check valve cores, available at Atradesen.com. Crafted from high-density POM (Polyoxymethylene/Acetal), these cartridge valves are fitted with heavy-duty 304 stainless steel springs and high-grade EPDM gaskets, providing excellent dimensional stability, thermal endurance, and leak-proof seals up to 110°C.

Designed to be pressed directly into matching hoses or rigid piping, this space-saving non-return core instantly stops liquid siphoning and reverse flow, protecting pump impellers and maintaining inline fluid pressure.

Two Configured Flow Styles

Select the optimal internal structure to match your pipeline's fluid dynamics and volume needs:

• Standard Flow (Compact Profile): Features a compact cylinder structure (available in 8mm, 10mm, 13mm, 14mm, 15mm, 20mm, and 26mm outer diameters). Ideal for smaller tubing networks, RO purifiers, and home appliance water supply connections.
• High Flow (Enhanced Fins Design): Features specialized built-in guide fins at the base to stabilize the valve gate and maximize fluid passage under heavy volume (available in 15mm, 20mm, 25mm, 32mm, 40mm, and 50mm outer diameters). Perfect for agricultural irrigation mainlines, booster pumps, and industrial drainage systems.

⚠️ Size Selection & Installation Guidelines

Review these alignment guidelines prior to installation to ensure a leakage-free fit:

• Matching Pipe Inner Diameter (ID): The specified size (8mm to 50mm) represents the outer diameter (OD) of the check valve cartridge. You must select a cartridge size that matches the INNER diameter (ID) of your pipe or flexible hose (e.g., if your soft vinyl tube has an ID of 15mm, select a 15mm check valve core).
• Water Flow Direction: Standard one-way operation. Water must flow from the flat/gasket end to push open the spring-loaded gate. Reverse flow will immediately compress the gate shut, blocking the return path.
• Smooth Insertion: Applying a thin film of clean water or food-safe silicone lubricant to the EPDM O-ring will make sliding the cartridge into the pipe interior significantly smoother and prevent O-ring pinching.

Technical Specifications

Frequently Asked Questions (FAQ)

Q: What is the benefit of the guiding fins on the High Flow models?

A: The guide fins hold the inner spring gate in a perfectly concentric position when pushed open by fluid pressure. This prevents turbulent water spin, decreases flow resistance, and allows a higher volume of water to pass through with minimal pressure loss.

Q: Will the EPDM O-ring securely seal against the pipe inner wall without glue?

A: Yes. The rubber O-ring is designed with a slightly larger diameter than the POM casing. When pressed into a matching rigid pipe or hose, the rubber compresses tightly against the inner wall, forming a strong mechanical friction seal that prevents water from bypassing the cartridge.