https://www.jelpc.com/product/valve/solenoid-valve/jel-series-diaphragm-solenoid-valve.html

Features:
1. Adopt new processing, improved inner hole roughness.
2. Adopt specially formulated silicone to increase of service life.
3. To import German high standard special grease which provides film in order to reduce the friction.
4. Valve spool material use soft magnetic stainless steel from German,increase the magnetic properties and reduce the coil power to 30%.