Suitable for back pressure to 50 psig (3.45 barg)[1].
Seats lapped for optimum performance.
Spherical pivot between disc and spring corrects misalignment and compensates for spring side thrust.
Stainless steel springs.
Tested and inspected for pressure setting and leakage.
All SS 316 model 171S suitable for sanitary applications, depending on requirements.
NOTE 1. Back pressure increases set pressure on a one to one basis, and reduces capacity. Back pressure in excess of 10% of set pressure is not recommended.[/ultimate_heading]
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[ultimate_heading main_heading=”General Application” alignment=”left” sub_heading_font_size=”desktop:15px;” sub_heading_line_height=”desktop:27px;” main_heading_style=”font-weight:bold;” sub_heading_margin=”margin-top:35px;”]Suitable for overpressure relief, pressure regulation, by-pass relief and protection of pumps, tanks, lines and hydraulic systems containing acid, caustic, ammonia and other corrosive liquids requiring iron, steel or SS materials.[/ultimate_heading]
[ultimate_heading main_heading=”Technical Data” alignment=”left” sub_heading_font_size=”desktop:15px;” sub_heading_line_height=”desktop:27px;” main_heading_style=”font-weight:bold;” sub_heading_margin=”margin-top:35px;”]Connections: FNPT
Temperature range:
Model 71S: -20°F to 406°F (-29°C to 208°C)
Models 171, 171P, 171S: -20°F to 550°F (-29°C to 288°C)
Pressure range:
Model 71S: 1 to 250 psig (.07 to 17.2 barg)
Models 171, 171P, 171S: 1 to 400 psig (.07 to 27.6 barg)[/ultimate_heading]
