LD65-H、L85-H、L120-H、L160-H are normally closed, it can
open in response to a control pressure signal，they are
often used in water lubricated screw compressor.
1.Hard oxidation of aluminum alloy parts such as valve body,
The others are using stainless steel material, They provide
intake valve anti-oxidation and corrosion resisting protection,
and the structure is simple and reliable.
Butterfly type intake valve is consistently stable and efficient
depending on the design of heavy hammer and check function.