The model 873 is a piston type hand loading
regulator. It utilizes a balanced poppet design for
high flow and minimum effect of inlet pressure on
outlet pressure. The poppet assembly is contained in
a cartridge with internal filtration permitting very
easy in field servicing. The low cost poppet cartridge
(pictured on the opposite side of this sheet) is factory
preassembled. It contains the more critical valving
elements of the regulator thus eliminating in-field
servicing problems. The regulator is self venting but
is optionally available without the vent. This
regulator design was developed for gas mixers for
commercial diving where high flow, very precise
pressure control and high reliability are needed. They
have served this application for many years. It is
available with different size sensing pistons resulting
in a complete range of outlet pressures. A highly
sensitive dome loaded version rated to 6000 PSI is
also available.