The construction of the main regulator in the CL838 is the same as a standard B838 service regulator except the main springs are installed to close the valve. This main regulator is the same in either the CL838-1 or CL838-2 models. Your selection of either model 1 or model 2 will be determined by the outlet pressure range of the pilot regulators.

ROOTS-CL838-REGULATOR [PDF]