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Frequently Asked Questions — Hydraulic Elevator Systems from Turkey
What standard governs hydraulic elevator systems?
Hydraulic elevator systems, including HPUs, cylinders, and valve blocks, must comply with EN 81-20, the European standard for the safety of passenger and goods passenger lifts. Additional requirements for hydraulic circuits are addressed in EN 81-20 Section 12. CE marking under the Machinery Directive 2006/42/EC applies to the complete hydraulic drive package. Turkish manufacturers on elevator.tr supply systems with full EN 81-20 compliance documentation.
What is HEES fluid and why is it important for hydraulic elevators?
HEES (Hydraulic Environmental Ester Fluid) is a biodegradable hydraulic fluid classified under ISO 15380 Type E. It is required or strongly recommended for hydraulic elevator installations in environmentally sensitive locations — including buildings near water bodies, nature reserves, or where local regulations mandate biodegradable fluids. Turkish HPU manufacturers offer systems fully compatible with HEES fluids, with seals and valve materials specified for ester-fluid compatibility.
What are the advantages of telescopic cylinders versus single-acting cylinders?
Single-acting cylinders are used for shallow pit installations with limited travel (typically up to 3–4 m), requiring a borehole for the cylinder. Telescopic cylinders extend to greater travel distances without a deep borehole, making them the preferred choice for mid-rise hydraulic elevator applications. Turkish manufacturers supply both configurations in CE-certified, EN 81-20-compliant designs.
Can Turkish hydraulic components be used in elevator modernisation?
Yes. Turkish manufacturers supply HPU replacement units and valve block upgrades designed for retrofit installation in existing hydraulic elevator shafts. Modernisation packages can include a new HPU, updated valve block with soft-start and energy-saving functions, and HEES-compatible seals — all supplied with CE marking and EN 81-20 conformity documentation.