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166:SReturn to Excess Flow Check Valve - Model 166

Model 166 S Dimensions
Model 166 S Dimensions

Flow Rating

The table on the following page shows the range of flow rates available for common fluids. Each size valve has several different spring options that can be used to vary the closing flow rate. Please contact MGM for assistance in choosing the proper spring for your specific application.
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LIQUID FLOW RATES (GALLONS PER MINUTE) VAPOR FLOW RATES (SCFM*)
SPRING Delta P CV WATER NH3 PROPANE BUTANE AIR NH3 PROPANE BUTANE
X1255R 3.3 746.0 1,349 1,717 1,889 1,765 14,445 18,838 11,707 10,197 Get Quote
X1256R 3.7 753.9 1,458 1,856 2,042 1,908 15,612 20,360 12,653 11,020 Get Quote
X1257R 4.7 731.1 1,585 2,017 2,219 2,074 16,972 22,134 13,755 11,980 Get Quote
X1258R 5.4 743.6 1,728 2,199 2,420 2,261 18,504 24,131 14,996 13,061 Get Quote
X1259R 5.6 755.6 1,788 2,276 2,504 2,340 19,146 24,969 15,517 13,515 Get Quote

*Vapor flow rates are shown at 60 degrees F, 100 psig