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316L Stainless Steel Construction – Offers superior corrosion resistance and durability for long-term sanitary service.
Highly Polished Internal Finish (Ra ≤ 0.8 µm) – Prevents product adhesion and bacterial growth, ensuring hygienic operation.
Low Crack Pressure Design – Opens smoothly with minimal upstream pressure, reducing flow resistance and system stress.
Quick-Response Spring Mechanism – Ensures instantaneous closure to eliminate backflow and prevent cross-contamination.
Flexible Mounting Options – Can be installed in both vertical and horizontal pipelines without performance loss.
Compact & Lightweight Structure – Saves installation space and simplifies system layout.
CIP/SIP Compatible – Designed to withstand Clean-in-Place and Steam-in-Place cleaning cycles without disassembly.
Easy Maintenance – Simple internal structure allows for fast inspection and parts replacement.
The Sanitary Spring Check Valve Mod. SIG/55 operates automatically based on differential pressure.
When the upstream fluid pressure exceeds the preset spring force (crack pressure), it pushes the sealing disc away from the seat, allowing fluid to flow forward through the valve.
As soon as the upstream pressure drops below the downstream pressure or flow stops, the spring instantly forces the disc back onto the seat, creating a tight, leak-proof seal that effectively blocks any reverse flow. This fully mechanical, fail-safe operation requires no external power or control signals.
10+ Years of Export Expertise – Deep understanding of international quality requirements and shipping logistics.
Precision Manufacturing – Advanced CNC machining ensures tight tolerances and consistent product performance.
Rigorous In-House Testing – Every unit undergoes strict pressure and leak tests to guarantee reliability.
Customized Solutions – We offer various connection types (Tri-Clamp, threaded, welded) and spring tension adjustments to meet your specific system needs.
Factory-Direct Pricing – Cost-effective rates without compromising on material quality or workmanship.
Reliable Delivery – Streamlined production schedules ensure on-time shipment for projects of any scale.
Responsive Technical Support – Our engineering team provides professional installation guidance and after-sales assistance.
Q: What is the standard crack pressure for the Mod. SIG/55?
A: The standard crack pressure is very low (typically 0.5 – 1.5 PSI) to allow easy opening. Custom spring settings are available upon request for specific backpressure requirements.
Q: Can this valve be installed vertically?
A: Yes. The Mod. SIG/55 is designed for reliable operation in both vertical and horizontal pipeline orientations.
Q: What industries is this check valve suitable for?
A: It is widely used in dairy, brewing, juice production, purified water systems, pharmaceutical liquid filling, cosmetics, and fine chemical processes.
Q: Is the valve suitable for viscous liquids or liquids with small particles?
A: Yes. The full-bore design and highly polished internals minimize flow resistance and prevent clogging, making it suitable for medium-viscosity liquids and suspended solids.
Q: How do I clean this check valve?
A: The valve supports CIP (Clean-in-Place) and SIP (Steam-in-Place) procedures. For thorough cleaning, the internal disc and spring can be easily disassembled and reassembled.
Q: What end connections are available for Mod. SIG/55?
A: We offer sanitary Tri-Clamp (clamp), threaded (NPT/BSP), and butt-weld ends to suit different piping systems.
Q: Does the spring come into contact with the media?
A: Yes, the spring is made from stainless steel and is designed to be fully media-compatible and corrosion-resistant for sanitary applications.
