High Performance Reverse Acting Disc
Model: ZD-007 (Advanced Knife-Blade Type)
Material: High-strength alloys: Inconel 718, Hastelloy C-276, Titanium.
Burst Range: 0.5 barg to 100+ barg (extended range).
Key Feature: Ultra-precise burst tolerance (±2% or better). Exceptional fatigue life (>100,000 cycles).
Typical Use: Critical processes in aerospace test stands, R&D, semiconductor, and hyper-precise chemical reactors.
Overview
For applications where pressure control is critical and reliability cannot be compromised, the high-performance reverse-acting disc sets the standard. Manufactured from premium alloys with exacting tolerances and often 100% burst tested, it delivers unmatched accuracy and longevity. It is designed for the most demanding services: protecting expensive catalysts, in cyclical testing equipment, or in processes where a slight overpressure spells product loss or safety incident.
Features & Benefits
Extreme Accuracy: Burst tolerances as tight as ±2% ensure the process operates safely at its maximum design limit.
Superior Fatigue Resistance: Engineered to withstand hundreds of thousands of pressure cycles without degradation.
Wide Material & Range Choice: Uses advanced metallurgy to cover aggressive media and extreme pressures.
Fully Characterized Performance: Supplied with detailed test certificates and cycle life data.
Protecting High-Value Assets
When protecting a multi-million dollar reactor or ensuring the repeatability of a scientific test, this disc is the insurance policy.
How It Works
Utilizes the reliable reverse-buckling and shearing principle but with optimized knife blade geometry and disc pre-stressing to achieve a sharper, more consistent burst point and minimize creep effects.
Specifications (Descriptive)
Sizes from DN15 to DN200. Tight tolerances are standard: ±2% or ±3%. Burst pressures can be specified in small increments within the range. Example: DN25 in Inconel 718 from 5 to 50 barg in 1 barg steps. Fatigue data is provided: e.g., 100,000 cycles at 80% of burst pressure. Maximum temperature depends on alloy: up to 550°C for some grades.
Accessories
Certified Test Reports (with actual burst pressure)
Special Holder Finishes (e.g., electropolished for ultra-clean systems)
Telemetry-Ready Burst Sensors
Q&A
Q: When is this level of precision necessary?
A: In processes operating very close to equipment limits (e.g., high-pressure autoclaves), in qualification testing where results depend on precise pressure thresholds, or where product specs are extremely tight.
Q: What is the lead time for such discs?
A: Longer than standard discs due to specialized materials, testing, and certification. Planning ahead is essential.
Q: Are they reusable after a pressure cycle below burst?
A: While their fatigue life is excellent, they are still single-use safety devices. Any activation, even if not a full burst, requires replacement if the pressure exceeded the manufacturer's recommended cycle limit.
About ZD Safety
Our engineering team works on bespoke, high-performance safety solutions. We understand the critical nature of your process and deliver discs with the documentation and reliability to match.
