The sealing end face of a liquid-lubricated mechanical seal (wet mechanical seal) is formed by the process medium or external isolation liquid to form an extremely thin liquid film of 0.5-3μm, which combines lubrication, cooling and sealing functions. It is the most mature and widely used form of mechanical seal. The single end face is directly lubricated by the medium, and the double end face introduces pressurized isolation fluid. It is suitable for pumps, kettles and mixers with clean water, sewage, oil and most chemical media.
GBHS-D double-end manifold
GBHSH-D container for kettle
Liquid film lubrication · End face cooling · Mature and stable
The rotating ring turns with the shaft; the liquid between the faces generates hydrodynamic and hydrostatic pressure as it moves and converges, creating a stable film that microscopically separates the two faces. A single‑face seal is lubricated directly by the sealed fluid, while a double‑face seal introduces a clean barrier fluid at a pressure higher than the process fluid.
Available as single‑face, double‑face, or cartridge designs; common friction pairs are silicon carbide‑on‑silicon carbide or silicon carbide‑on‑graphite, with secondary seals of fluoro‑rubber or PTFE. Metal components are primarily 304 stainless steel, with 316 as an option, selectable based on operating conditions.
Select the seal according to the medium properties, pressure, temperature, rotational speed and shaft diameter. For media containing particles or prone to crystallization, provide a flushing/quench plan. During installation, keep the seal faces clean, avoid impact, and ensure shaft alignment and venting of the seal chamber.
博特尔密封提供全系列机械密封及配套系统，点击切换查看各分类。
提交介质、温度、压力、轴径等工况参数，博特尔工程师协助选型，并提供非标定制与国产化替代方案。
