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DN200 / 8" Large Bore Size – Delivers high-capacity flow for bulk powder conveying and rapid discharge operations.
Sanitary Weld-End (Middle Weld) Design – Enables permanent, leak-proof installation directly into the pipeline, eliminating gaskets, clamps, and dead-leg areas for superior hygiene.
Manual Lever Operation – Provides simple, intuitive, and reliable on/off control with a built-in position stop for precise 90° quarter-turn actuation.
Specialized Powder-Profile Disc – The optimized disc geometry gently cuts through powder columns during closure, minimizing particle degradation and preventing flow obstruction.
FDA-Compliant Sealing Materials – Food-grade EPDM or Silicone seals are standard, with PTFE options for higher temperatures, ensuring safe contact with edible and pharmaceutical products.
Mirror-Polished Internal Surface – Internal finish Ra ≤ 0.8μm prevents powder adhesion, enables rapid cleaning, and fully supports CIP (Clean-in-Place) protocols.
Heavy-Duty 316L Stainless Steel Body – Offers exceptional corrosion resistance and structural strength for continuous industrial operation.
Wide Operating Temperature Range – Suitable for applications from -20°C to 120°C (depending on seal material).
The DN200 Sanitary Powder Butterfly Valve operates on a simple quarter-turn rotary principle. A manual lever handle is connected directly to the valve stem, which rotates the disc (butterfly plate) inside the valve body.
When the handle is turned to the open (parallel) position, the disc rotates 90° to align parallel with the pipeline axis, allowing powder or granules to flow freely through the full bore. When the handle is turned to the closed (perpendicular) position, the disc rotates 90° to block the pipeline cross-section, forming a tight seal against the valve seat. The middle weld (weld-end) body is permanently welded between two pipe sections, ensuring zero leak paths and a smooth, continuous flow path with no internal obstructions other than the disc itself.
10+ Years of Export Experience – A trusted partner for sanitary valve and fitting solutions across the globe.
Premium Material Quality – All products made from high-purity SS316L with full material traceability and consistent quality.
Specialized Powder Expertise – Our valve designs are specifically optimized for powder and bulk solid applications, not just adapted from liquid valves.
Strict Dimensional Tolerance – Weld ends manufactured to ISO 4200 / DIN 11850 standards for perfect fit with standard sanitary tubing.
Superior Internal Finish – Guaranteed internal surface finish of Ra ≤ 0.8μm as standard, meeting the highest hygienic requirements.
Factory-Direct Pricing – Competitive costs with no intermediary markups, delivering excellent ROI.
Flexible Customization – Available in alternative materials (SS304), seal options (PTFE, FKM), and special finishes upon request.
Reliable Global Shipping – Efficient logistics ensure prompt delivery with professional export packaging for oversized DN200 valves.
Q: What is the purpose of a "middle weld" design in this powder butterfly valve?
A: A middle weld (weld-end) design means the valve body is equipped with straight pipe ends that are welded directly to the pipeline. This eliminates flanges, gaskets, and clamps, reducing dead-legs, leakage points, and product entrapment – critical for sanitary powder applications.
Q: What materials is the DN200 Powder Butterfly Valve available in?
A: It is standard in SS316L (1.4404) stainless steel. SS304 is available upon request. Body seals are available in FDA-grade EPDM, Silicone, or PTFE.
Q: What is the maximum operating temperature?
A: With standard EPDM seals, up to 120°C. With PTFE seals, up to 150°C. For low-temperature applications, silicone seals can handle down to -40°C.
Q: Is this valve suitable for abrasive powders?
A: Yes. The hardened disc surface and robust SS316L construction provide good resistance to mild abrasive powders. For highly abrasive materials (e.g., sugar, salt), we recommend optional hard chrome-plated or Stellite-coated disc options (available upon request).
Q: How is the valve cleaned?
A: The mirror-polished internal surface and crevice-free design make it fully compatible with CIP (Clean-in-Place) systems. Standard CIP spray balls can effectively clean the disc and body interior.
Q: What is the actual bore size of a DN200 valve?
A: DN200 corresponds to a nominal pipe size of 200mm (approximately 8 inches) with a flow diameter consistent with standard sanitary tubing dimensions.
Q: Does the manual lever lock in position?
A: Yes, the manual lever is equipped with an adjustable stop plate that allows the operator to lock the valve in fully open, fully closed, or intermediate throttling positions.
Q: What industries commonly use this powder butterfly valve?
A: It is widely used in dairy powder (milk powder, whey), food ingredients, starch, flour, sugar, spice, pharmaceutical excipients, chemical powders, and animal feed processing lines.
