BPG 7829 Solar Set


BPG 7829 Solar Set is made of a unique combination of next-generation engineered components in an innovative configuration to withstand the harsh requirements in molten salt applications. The bottom of the set is additionally equipped with a metal cap to protect the set against aggressive or oxidizing media. The metal cap at the top will protect the set against influence of the atmosphere at high temperatures. The core of the set features an advanced sealing material composition with progressive low-friction impregnation which additionally protects the set against aggressive media. Furthermore, the set is supported by intermediate, mineral-based high-temperature barrier discs which create a reliable low leakage sealing solution.



BPG 7829 has been especially developed as a sealing element for high temperature and corrosive resistant valves used in molten salt applications. These high temperature valves are currently in use at Concentrating Solar Plants (CSP) where molten salts are being used as a substitute to conventional heat transfer fluids, such as heat transfer oils and steam.

Operation Parameters

Speed2 m/s
Temperature–200 … +600°C
pH Value0 … 14
Pressure30 MPa


Product Specifications

MediaMolten salt, oxidizing media and other chemicals


  • Top and bottom ring with metal cap
  • Oxidation protection against atmosphere and medium
  • Advanced impregnation for friction reduction and protection against media
  • Mineral-based discs between sealing rings
  • Barrier against media permeation
  • Protection against aggressive media


Data Sheet BPG 7829

Installation Instructions

Technical Information Packings


Sealing challenges in the solar power industry

Solar power is one of the fastest growing renewable energy segments world-wide with its unique sealing challenges. The applications are characterized by a combination of high temperatures and very aggressive media. In this field traditional material selections reach their limits and only advanced materials and designs help end-users sealing molten salt systems effectively.