O’Keefe Controls Co.
O’Keefe Controls Co.
4 Maple Drive
Monroe, CT 06468
Phone: 203.261.6711
Email: info@okeefecontrols.com • Website: www.okeefecontrols.com
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Engineered for high-performance fluid control, the R4 and RG4 series combine a precision orifice with a robust metal gasket, purpose-built for face seal fittings. Choose from premium material options—including stainless steel or nickel, with or without silver plating—to match your exact chemical, pressure, and temperature requirements. These orifices deliver reliable, leak-tight performance where accuracy and durability matter most.  The RG4 is equipped with a gasket retainer, making resuse or replacement much simpler.

Precision Metal Orifices VCR Gaskets
Unit of Measure
1 2 3 4 5 

Part Number

Orifice Diameter

Material

CV

R4-94-SS N/A 0.0940 in N/A 316 SS N/A 0.200
R4-96-SS N/A 0.0960 in N/A 316 SS N/A 0.210
R4-100-SS N/A 0.1000 in N/A 316 SS N/A 0.230
R4-104-SS N/A 0.1040 in N/A 316 SS N/A 0.250
R4-109-SS N/A 0.1090 in N/A 316 SS N/A 0.270
R4-113-SS N/A 0.1130 in N/A 316 SS N/A 0.310
R4-120-SS N/A 0.1200 in N/A 316 SS N/A 0.340
R4-125-SS N/A 0.1250 in N/A 316 SS N/A 0.370
RG4-4-SS N/A 0.0039 in N/A 316 SS N/A 0.00035
RG4-5-SS N/A 0.0051 in N/A 316 SS N/A 0.00061
RG4-6-SS N/A 0.0059 in N/A 316 SS N/A 0.00086
RG4-7-SS N/A 0.0071 in N/A 316 SS N/A 0.0012
RG4-8-SS N/A 0.0079 in N/A 316 SS N/A 0.0015
RG4-9-SS N/A 0.0091 in N/A 316 SS N/A 0.0019
RG4-10-SS N/A 0.0102 in N/A 316 SS N/A 0.0025
RG4-11-SS N/A 0.011 in N/A 316 SS N/A 0.0028
RG4-12-SS N/A 0.0122 in N/A 316 SS N/A 0.0034
RG4-13-SS N/A 0.013 in N/A 316 SS N/A 0.0038
RG4-14-SS N/A 0.0142 in N/A 316 SS N/A 0.0043
RG4-15-SS N/A 0.015 in N/A 316 SS N/A 0.005
RG4-16-SS N/A 0.016 in N/A 316 SS N/A 0.0055
RG4-17-SS N/A 0.017 in N/A 316 SS N/A 0.0067
RG4-18-SS N/A 0.018 in N/A 316 SS N/A 0.0073
RG4-19-SS N/A 0.019 in N/A 316 SS N/A 0.008
RG4-20-SS N/A 0.02 in N/A 316 SS N/A 0.0088
Unit of Measure
1 2 3 4 5