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The Shand & Jurs Biogas 97177 Double Ported Regulator provides
sensitive control at a preset upstream or downstream
pressure (up to 20" w. c.) in biogas lines such as those in
low pressure digesters, landfills, lagoons and other
fermentation processes. The regulator is a balanced,
double ported valve that is actuated through a mechanical
offset by a large spring-loaded diaphragm. The valve
can be configured as a backpressure (upstream) regulator
to provide reliable control of gas flow or as a pressure reducing
(downstream) regulator, which will maintain a
constant downstream pressure.
Backpressure Regulator: Valve opens when upstream
pressure exceeds set point.
Pressure Reducing Regulator: Valve opens when
downstream pressure drops below set point.
Field adjustment of the set point is easily done by
adjustment of the diaphragm spring, which is provided
with a visual indicator.
The valve is available in two standard pressure ranges from
1" to 10" w. c. and 10" to 20" w. c. Standard sizes are 2"
through 8" flanged connections with optional 1" NPT
connection available (consult factory). A 1" NPT external
sense connection is provided. Connection should be made
a minimum of 10 feet from the regulator.
The S&J 97177 is especially designed for hydrogen sulfide
and hot, wet methane, which are the main components of
digester gas streams in municipal wastewater treatment
facilities. Standard materials of construction include
aluminum, carbon steel or cast iron body with aluminum
diaphragm housing (consult factory for other materials).
All internal trim material is constructed from 304 stainless
steel. The standard diaphragm material is Nylon reinforced
Buna N with optional Viton and Teflon materials available
(consult factory). The combination of these components
will withstand the severest of process environments. The
97177 is 100% U.S. made.
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