Also known as a priority valve, the model 635 is a fully
balanced economical regulator. It is similar to our model 211
regulator but it is capable of much higher flow rates. Its
primary use is on compressors to maintain back pressure on
filters and separators thus improving their efficiency as much
as 1000%. The stainless steel metal to metal seat is designed to
be self cleaning. It maintains constant back pressure (set
pressure) independent of outlet pressure. When outlet pressure
(such as in a tank being filled) reaches set pressure the
regulator opens fully permitting unrestricted flow. Normally
the valve is set for back pressures of 1500 to 6000 PSI.
However, it can be set for pressures as low as 150 PSI. Lighter
than standard springs can be ordered to improve low pressure
operation.