Union elbow taper seat malleable iron

  Datasheet (PDF)

The Georg Fischer union elbow 98 is a precision-engineered malleable cast iron directional fitting engineered for detachable ninety-degree transitions between taper external and parallel internal threaded pipelines. Designed in accordance with EN 10242 under Design Symbol A and international designation ISO/EN UA12, the assembly integrates a 96 ET elbow union bush, a 382 male union end, and a robust 374 union nut. Metallic tightness is achieved through a ground taper seat mechanism that delivers a reliable, pressure-proof metal-to-metal seal without requiring elastomeric or fibrous flat gaskets. This metallic seating geometry ensures durable sealing performance under fluctuating operational conditions, mechanical vibration, and elevated thermal cycles. Manufactured from high-grade whiteheart malleable cast iron EN-GJMW-400-5, the fitting exhibits exceptional structural toughness and tensile resilience, absorbing high mechanical stresses without deformation. The component is treated with high-purity hot-dip galvanisation exceeding standard requirements, yielding a uniform iron-zinc alloy layer that provides superior corrosion resistance suitable for demanding industrial piping, compressed air, building services, cooling loops, gas distribution, and potable water installations in full conformity with hygiene standards. Precision jointing threads comply with EN 10226-1 and ISO 7-1, featuring an internal parallel Rp thread on the bush and a taper external R thread on the union end, complemented by ISO 228-1 mechanical fastening threads G on the union nut. The mechanical assembly facilitates rapid dismounting and reassembly of pipeline sections, valves, and plant equipment without disturbing adjacent stationary pipework, accommodating working pressures up to 25 bar across temperatures from -20 degrees to 120 degrees Celsius, and up to 20 bar at temperatures up to 300 degrees Celsius.