Stainless steel backing DU bushing for Valves

Structure:

DU Stainless steel backing PTFE coated composite bushing (also called SF-1SS) is based on SUS304 or SUS316 stainless steel back sintering with a bronze powder intermediate layer, then coated with a PTFE inner lay.

Characters:

Due to the stainless steel backing it has very good performance of anti-corrosive, anti-acid, anti-alkali, anti-salty liquid charactors.

The PTFE (Polytetrafluoroethylene ,Teflon) material also can be used for corrosive and chemical liquid, also it is soft so be used for sealing.

Application:

This kind of bushing can be widely used in chemical industry such as acid/alkali flow indicator, pumps, valves etc.

For example,more and more valves manufactures using our stainless steel backing bushing for spindle position,like butterfly valves.

Comparing to brass bushing or ceramics bushing, our customers are very satisfied with this bushing as it no needs oil lubricating, with long life time, with sealing function, easy to install and cost saving.

Technical data:

Load capacity：100N/mm2  

Temperature：-190°C ~+280°C  

Speed limit：2.5m/s  

Friction coef (μ)：0.03~0.18 PV  

limit（dry）：3.0N/mm2 .m/s PV  

limit（oil）：40N/mm2 .m/s 

Application of the product

DU Oilless Bushing