Kroll & ZILLER GmbH + Co.KG
About
Kroll & Ziller GmbH + Co. KG, headquartered in Hilden, Germany, is an 80-year-old family-owned manufacturer recognized as the global market leader in rubber-steel flange gaskets. Operating under the Ziller Holding umbrella with production facilities in Germany, Poland, and the Czech Republic, the company maintains approximately 80% of its output under the Made in Germany designation and operates an in-house rubber compounding laboratory for custom formulations certified to TÜV SÜD ISO 9001. The flagship G-ST rubber-steel gasket series addresses virtually every flange configuration: standard G-ST for steel flanges, G-ST/GUSS for cast iron, G-ST-P/S for profile steel, G-ST-P/K for plastic flanges, G-ST-P/ISO for galvanic isolation preventing bimetallic corrosion, G-ST-P/KN for power shunt continuity, G-ST-P/HTB for elevated thermal loads, G-ST-P/OE for custom dimensions, and G-ST/FD in flat design for tight-clearance installations. Beyond rubber-steel, Kroll & Ziller produces RTJ ring-joint gaskets and comb profile gaskets for high-pressure connections, BFD bolt-free flange gaskets, PTFE and graphite gaskets for chemical service, wedge rings for axial pipe alignment, hammer union seals (G-ST/GOS), and standard O-rings. Their products serve drinking water, natural gas, hydrogen, chemical and petrochemical, fire protection, food technology, and mining sectors worldwide.
Key Products
Standard rubber-steel flange gasket for water and gas pipeline connections.
Rubber-steel gasket variant specifically designed for cast iron flange connections.
Profile gasket designed for steel flange connections with precise sealing geometry.
Profile gasket designed for plastic (Kunststoff) flange connections.
Freely dimensionable profile gasket for individual and custom flange requirements.
Profile gasket for rubber-lined pipes and flanges in corrosive service.
Profile gasket providing galvanic isolation to prevent bimetallic corrosion between dissimilar flange materials.
Profile gasket with mechanical interlock (Kraftnebenschluss) for enhanced electrical continuity.
Profile gasket with higher thermal load capacity for elevated temperature applications.
Hybrid profile gasket combining multiple sealing technologies in one unit.
Flat-design rubber-steel gasket for applications with limited space between flanges.
Bolt-free flange connection gaskets that seal without bolt holes, simplifying installation.
Metallic ring-type joint gaskets for high-pressure and high-temperature flange connections in oil, gas, and chemical industries.
Metallic spiral serrated gaskets for demanding high-pressure sealing applications.
Adjustable wedge-shaped sealing rings used in pipeline construction for axial pipe connections.
PTFE-based gaskets for chemical-resistant sealing in aggressive media applications.
Graphite-based gaskets for high-temperature sealing in industrial applications.
Seals for hammer union connections commonly used in oil and gas, chemical, and industrial piping.
Standard O-ring seals for static and dynamic sealing across a wide range of applications.
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