Sanitary Reverse-Acting Rupture Disc
Product Model: ZD-RA02 (Sanitary Reverse-Acting)
Material: 316L or 316LVM Stainless Steel, all wetted parts electropolished (Ra < 0.8 µm).
Connections: Tri-Clamp, ISO, or SMS sanitary fittings.
Key Feature: Crevice-free design suitable for Clean-in-Place (CIP) and Steam-in-Place (SIP) procedures. Non-fragmenting.
Pressure Range: 0.5 barg to 10 barg.
Primary Use: Overpressure protection in bioreactors, fermenters, food & beverage processing tanks, and pharmaceutical process vessels.
Overview
In hygienic processing, maintaining product purity and preventing microbial harborage is critical. This sanitary reverse-acting disc is engineered specifically for these demands. Featuring a fully electropolished, crevice-free internal geometry and sanitary clamp connections, it integrates seamlessly into aseptic and clean-in-place systems. Its non-fragmenting operation ensures that no debris—whether metal or otherwise—can contaminate the valuable product stream in the event of an overpressure release, providing safety without compromising product integrity.
Features & Benefits
Hygienic Design & Finish: Electropolished surfaces and lack of dead legs facilitate effective cleaning and sterilization, supporting validation protocols.
Non-Contaminating Burst: The sheared disc center is retained within the assembly, guaranteeing zero particulate release into the process fluid.
CIP/SIP Compatible: Constructed from materials and with seals that can withstand typical cleaning and sterilization cycles when parameters are observed.
Sanitary Connections: Allows for quick installation and removal without tools, minimizing downtime during maintenance or replacement.
How It Works
The mechanism is identical to a standard reverse-acting disc: pressure-induced buckling followed by shear. The entire assembly, however, is crafted to hygienic standards. All wetted surfaces are smooth and polished, and the design ensures that in the open position, the flow path remains free of obstructions or traps where product could accumulate.
Specifications (Descriptive)
Common sizes are 1.5", 2", 3", 4" Tri-Clamp and DN50, DN80, DN100 ISO flanges. Burst pressures are typically low, suitable for tank protection (e.g., 0.7 to 2.5 barg). All wetted metals are 316L Stainless Steel, electropolished. Gaskets are platinum-cured silicone or EPDM. The assembly can be supplied with documentation supporting material compliance (FDA, EU 1935/2004) and cleanliness certifications.
Q&A
Q: How do I know if the disc has activated?
A: You can specify an external rupture indicator. For critical applications, electronic sensors with hygienic housings are available to provide a remote signal to the control system without breaching the sterile boundary.
Q: Is this disc suitable for aseptic (sterile) processing?
A: Yes, the design supports aseptic requirements. For direct use in a sterile core, it can be supplied cleaned, bagged, and sterilized (e.g., via gamma irradiation) with appropriate documentation.
Q: Can it handle viscous products like cell culture media?
A: Yes. The smooth, non-fragmenting operation is advantageous for viscous fluids. The clean, full-bore opening minimizes the risk of clogging during discharge compared to some fragmenting designs.
About ZD Safety
We protect both your process and your product. Our sanitary reverse-acting discs are designed with a deep understanding of hygienic standards, ensuring safety enhances—rather than threatens—your product quality and regulatory compliance.
