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

R4-4-SS N/A 0.0039 in N/A 316 SS N/A 0.00035
R4-5-SS N/A 0.0051 in N/A 316 SS N/A 0.00061
R4-6-SS N/A 0.0059 in N/A 316 SS N/A 0.00086
R4-7-SS N/A 0.0071 in N/A 316 SS N/A 0.0012
R4-8-SS N/A 0.0079 in N/A 316 SS N/A 0.0015
R4-9-SS N/A 0.0091 in N/A 316 SS N/A 0.0019
R4-10-SS N/A 0.0102 in N/A 316 SS N/A 0.0025
R4-11-SS N/A 0.011 in N/A 316 SS N/A 0.0028
R4-12-SS N/A 0.0122 in N/A 316 SS N/A 0.0034
R4-13-SS N/A 0.013 in N/A 316 SS N/A 0.0038
R4-14-SS N/A 0.0142 in N/A 316 SS N/A 0.0043
R4-15-SS N/A 0.015 in N/A 316 SS N/A 0.005
R4-16-SS N/A 0.016 in N/A 316 SS N/A 0.0055
R4-17-SS N/A 0.017 in N/A 316 SS N/A 0.0067
R4-18-SS N/A 0.018 in N/A 316 SS N/A 0.0073
R4-19-SS N/A 0.019 in N/A 316 SS N/A 0.008
R4-20-SS N/A 0.02 in N/A 316 SS N/A 0.0088
R4-21-SS N/A 0.021 in N/A 316 SS N/A 0.0096
R4-22-SS N/A 0.022 in N/A 316 SS N/A 0.011
R4-23-SS N/A 0.023 in N/A 316 SS N/A 0.012
R4-24-SS N/A 0.024 in N/A 316 SS N/A 0.013
R4-25-SS N/A 0.025 in N/A 316 SS N/A 0.014
R4-26-SS N/A 0.026 in N/A 316 SS N/A 0.016
R4-27-SS N/A 0.027 in N/A 316 SS N/A 0.017
R4-28-SS N/A 0.028 in N/A 316 SS N/A 0.018
Unit of Measure
1 2 3 4 5