CHECK VALVE

Sanitary Threaded Check Valve

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1. Basic Definition

A sanitary threaded check valve is designed for hygienic pipeline systems in food, pharmaceutical, and other clean industries. It automatically opens/closes via fluid pressure to prevent backflow. Typically made of ‌304/316L stainless steel‌, it complies with ‌ISO, DIN, 3A‌, and other sanitary standards.

2. Core Structure

  • Connection Type‌: Internal thread (female thread) or external thread (male thread), with some models supporting ‌clamp‌ or ‌welded‌ hybrid connections.

  • Valve Design‌: ‌Swing type‌ or ‌spring-assisted lift type‌, sealed with ‌O-rings‌ or ‌metal seats‌.

  • Size Range‌: ‌DN15-DN100 (½"–4")‌, pressure rating ‌150CWP–750CWP‌.

3. Technical Features

  • Material‌: ‌304L/316L stainless steel (DIN 1.4307/1.4404)‌, forged construction.

  • Compatible Media‌: Water, oil, gas, and high-purity fluids (e.g., dairy, pharmaceutical liquids).

  • Cleanability‌: Supports ‌CIP (Clean-in-Place)‌ and ‌SIP (Sterilize-in-Place)‌ processes.

4. Certifications & Standards

  • Industry Approvals‌: ‌3A (food-grade), DIN 11851 (threaded connections), SMS (Swedish Hygienic Standard)‌.

  • Performance‌: Operating temperature ‌-20°C to 150°C‌, dynamic ‌pressure drop‌ based on flow rate.

5. Typical Applications

  • Biopharmaceutical sterile pipelines

  • Dairy processing equipment

  • High-purity chemical fluid transfer