KT-39Y-50A Marine HVAC & Pump Vibration Isolator — 130–200 kg Range

The KT-39Y-50A is a mid-load member of the KT general-purpose marine vibration isolator family, engineered for HVAC package units, circulation pumps, marine refrigeration compressors, and cabin-auxiliary equipment in the 130 to 200 kg static-load range per mount. Natural frequency is selectable between 8 and 12 Hz depending on Shore A hardness selection, placing rigid-body modes well below typical disturbance frequencies of 50 Hz and above to achieve 85 to 90 percent isolation. The damping coefficient of 0.08 controls resonant build-up during pump startup and HVAC compressor cycling. The rubber compound is rated −45 to +70 °C continuous with oil and UV resistance, suiting both tropical and cold-climate service. The KT family is available with optional captive retention kits for installations requiring fail-safe protection, though the standard 50A designation is non-captive.