YORK 025-35133-000 Expansion Valve

25-35133-000 is the original part number of York (a brand under Johnson Controls). The official description is Valve, Thermal Expansion. The complete model string provided in the distribution materials is Y1210-BIV-8-110. The refrigerant is labeled as R134a, with a capacity of approximately 4 tons. The interface size is recorded as 12×1316. The origin information varies across different channels, being marked as either American or Polish production, and some sellers classify it as a Sporlan (Sporlan Poland) compatible valve.
Usage: Domestic York component suppliers almost unanimously classify it as an "oil-cooled expansion valve", alongside 025-38170-000, and it is mainly used to complement the York YK series centrifugal chiller units (some lists also include YT and YS). It is installed on the oil cooling circuit and serves as a throttling element to control the refrigerant flow entering the oil cooler: the temperature sensing package senses changes in oil temperature or suction temperature, which then drives the diaphragm to move the valve needle, automatically adjusting the liquid supply volume to maintain the lubricating oil temperature within the set range, ensuring the viscosity and lubrication, sealing performance of the oil, and avoiding excessive liquid supply that causes refrigerant waste or compressor backflow.