Problem Description  

RTJ sealing connections - primarily in the pressure range from class 900 / PN63 - are susceptible to temperature changes if the sealing pressure is too low. Furthermore, many factors play a role in the tightness: difference in hardness between the sealing surface and the gasket, installation method, condition of the sealing surfaces, ...

Requirements for a re-equipment

• Compensation of setting behaviour in the installation process
• Maintenance of a minimum surface pressure after plastic deformation of the gasket
• no visible leakage until TA-Luft tightness
• Lifetime minimum 6 to 12 years

Solution

• Calculation of the optimized installation screw forces and the setting behavior
• Use of additional springs when there is a risk of high power drop during operation
• Machining of suitable sealing surfaces
• direct application of force to the seal

Design limits

• Design pressure: up to class 2500 / 400 bar
• Design temperature: up to approx. 900°C
• Gasket diameter: up to size R105 / 1056 mm
• Screw size: up to approx. M100 / 4inch