Coliter ® Metal Bellows Compensator – Axial Expansion Absorption for High-Temperature & High-Pressure Piping Systems

JDZ Metal Bellows Compensator – Multi-Layer Stainless Steel Expansion Joint for Thermal Movement, Vibration Damping, and Misalignment Compensation

The Coliter® JDZ Metal Bellows Compensator is a precision-engineered axial expansion joint designed to absorb thermal expansion, contraction, vibration, and minor misalignment in demanding industrial piping systems. Constructed with multi-layer stainless steel bellows (typically 304 or 316L), it offers high flexibility, excellent fatigue resistance, and reliable sealing performance under extreme conditions—suitable for media temperatures up to 600°C and aggressive fluids such as steam, hot oil, and chemical process streams. The compensator features a compact, concentric design with optional flanged (JZ/F) or welded/tube-end (JZ/J) connections, available in sizes from DN32 to DN300. It functions as a critical safety component by relieving pipeline stress, protecting pumps, valves, and vessels from deformation or failure. Key applications include power generation, district heating, petrochemical plants, HVAC systems, and atomic energy facilities. Compliant with GB/T 12777, EJMA, and ISO standards, the JDZ series undergoes rigorous pressure and cycle testing to ensure long service life and operational integrity. With customizable wave numbers, pressure ratings (0.25–2.5 MPa), and end connections, it provides a tailored solution for complex thermal management challenges in high-performance fluid systems.