Pressure regulator receives main air pressure and supplies to the desirable level pressure to a positioner or other devices. - Maintains desirable pressure level, regardless of fluctuation of pressure input.  - Aluminum body increases versatility of the product in different environments.  - 5-micron filter sorts minuteness particles in the air.  - Relief function is available which discharges to atmosphere if the outlet pressure is higher than setting pressure. www.valve-cn.com