Composite Type C – Underpressure Bursting Disc

The Composite Type C – Underpressure bursting disc is engineered for precise, reliable protection at low to medium burst pressures. Manufactured using advanced laser-cut technology, this disc delivers pinpoint accuracy in predetermined breaking points, enabling burst pressures as low as 20 mbar at 20 °C. Its segmenting, fragment-free opening pattern ensures full venting performance while protecting downstream equipment.

Available in a wide range of materials—including stainless steel, nickel, Inconel, Hastelloy*, and tantalum—the Composite Type C is built to withstand demanding operating environments. A precision-fitted PTFE or PFA sealing diaphragm is installed between the slotted metal foils, enabling safe use at temperatures up to 200 °C.

Key Features & Capabilities

• Ideal for low to medium burst pressures
• Laser-cut break points for precise, customer-specified burst values
• Minimal burst pressures from 20 mbar (20 °C operating temperature)
• Segmented, fragment-free opening for safe discharge
• Robust diaphragm seal in PTFE or PFA
• Usable at temperatures up to 200 °C
• Standard sizes from DN15 to DN900
• Available with integrated burst detection
• Compatible with EN 1092 and ASME B16.5 flange standards
• Support-free mounting option available

Variants Available

• Underpressure bursting discs
• Overpressure bursting discs
• Bi-directional discs for vacuum and overpressure in one unit

Burst Detection Options

• Membrane signal transmitters for discs mounted between flanges without a holder
• Inductive proximity switch transmitters for holders or clamp-mounted installations

Benefits

• Fully customisable specifications for material, dimensions, and burst pressure
• Extremely low burst pressures achievable
• Suitable for large-diameter applications
• Completely fragment-free opening for downstream safety
• Optional integrated burst detection
• Support-free installation possible depending on application

The Composite Type C – Underpressure bursting disc delivers proven reliability with unbeatable flexibility—engineered to safeguard low-pressure systems with exceptional precision and safety.

Technical Specifications: