The Exhaust Valve, 3/4" BSP is compatible with GEM HLN 12, HLN 15, HLN 17, HLN 20, HLN 25 models. Always cross-check your machine's model number, or contact our support team to confirm fitment. GEM Equipments Pvt. Ltd. is an ISO 9001:2015 certified, India-based manufacturer (since 1984) of compressed air dryers, cooling towers, industrial chillers, and compressed air treatment accessories, headquartered in Coimbatore, Tamil Nadu. All spare parts on Gemspares.in are genuine and sourced directly from the manufacturer.