Solenoid Valve Main Sleeve

The core of this guidance function lies in internal bore precision and surface quality. Using precision honing and superfinishing processes, we control bore cylindricity within 2μm, reduce surface roughness Ra to below 0.1μm, and compress clearance tolerance to within ±3μm, ensuring smooth, jam‑free spool movement across full stroke with leakage far below industry standards. The sleeve is made of precipitation‑hardened stainless steel with a DLC wear‑resistant coating, maintaining dimensional stability under 25MPa working pressure and over a -40℃~150℃ temperature range. Dynamic fit wear life exceeds 5 million cycles, significantly extending maintenance intervals for the entire valve assembly.

This main sleeve is widely compatible with solenoid‑type active suspension systems, continuous damping control modules, and hydraulic proportional valve assemblies, supporting multiple mainstream spool specifications. Each piece undergoes 100% air‑gauge inspection for inner diameter, roundness, and straightness, along with pressure‑tightness testing and dynamic response matching verification to ensure batch‑to‑batch consistency. The product is developed and manufactured in compliance with IATF 16949 and ISO 26262 functional safety standards. Though concealed inside the valve body, the main sleeve delivers reliable actuation support for every millisecond‑level damping adjustment through micron‑grade craftsmanship.