Standard Flat Rupture Disc
Product Model: ZD-FL01 (Standard Flat Disc)
Material: 304 or 316 Stainless Steel, Aluminum, or Nickel.
Design: Simple, flat metal membrane.
Opening Characteristic: Bursts open, typically with a multi-point star or cross-shaped tear.
Pressure Range: Low to medium, typically 0.5 barg to 10 barg.
Primary Use: General overpressure protection for air receivers, water tanks, hydraulic reservoirs, and other non-corrosive, non-hazardous gas/liquid applications.
Overview
The standard flat rupture disc represents the most fundamental and economical form of overpressure protection. It consists of a flat, circular metal membrane clamped between flanges. Its simplicity is its strength: no moving parts, easy to understand, and cost-effective to manufacture. When system pressure exceeds the membrane's tensile strength, it bursts open, providing immediate relief. This disc is the go-to solution for protecting countless utility systems and industrial equipment where the medium is benign, and the consequences of fragments are not a primary concern.
Features & Benefits
Extreme Simplicity & Reliability: No complex mechanisms to fail. Its performance is based solely on material strength.
Low Cost: The most economical type of rupture disc, ideal for budget-conscious applications.
Compact Design: Requires minimal axial space in the pipeline.
Wide Availability: Stocked in many common sizes and pressures for quick delivery.
How It Works
The flat disc is subjected to uniform tension. At its calibrated burst pressure, the stress exceeds the material's ultimate tensile strength. Failure typically initiates at the thinnest point or a pre-induced flaw (like a small score) and propagates rapidly, often in a star pattern, creating a large opening.
Specifications (Descriptive)
Available in a vast range of sizes, from DN15 to DN500+. Common burst pressures for a DN100 disc might be 2, 4, or 6 barg. Material selection depends on service: Aluminum for very low pressure/air, 304 SS for general use, 316 SS for mild corrosion. They are often supplied with protective gaskets on both sides. Standard burst tolerance is typically ±5%.
Q&A
Q: Does this disc create fragments?
A: Yes, typically it does. The bursting action usually creates several sharp metal petals. Therefore, it should not be used upstream of equipment that could be damaged by debris, such as compressors, control valves, or turbine inlets.
Q: Can it handle vacuum or backpressure?
A: No. A standard flat disc has very little resistance to reverse pressure (vacuum) and will collapse easily. For services involving vacuum, a domed (forward or reverse acting) or specially supported flat disc is required.
Q: How is it different from a scored forward-acting disc?
A: A scored forward-acting disc has a domed shape and controlled score lines for a predictable opening. A standard flat disc is flat and bursts in a less predictable fragmenting pattern. The flat disc is generally for lower pressures and less critical applications.
About ZD Safety
We provide foundational safety solutions. Our standard flat discs offer reliable, no-frills protection for a multitude of applications, ensuring basic safety needs are met effectively and affordably.
