Precision Metal Orifices - Circular Disk On O'Keefe Controls Co.

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Phone: 1-800-533-3285 or 203 261-6711

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.

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Orifice Diameter (in)

Nominal Orifice Size

C_V

Gasket Retainer

Part Number	Orifice Diameter	Material	C_V

RG4-67-SS	N/A 0.0670 in	N/A 316 SS	N/A 0.100
RG4-70-SS	N/A 0.0700 in	N/A 316 SS	N/A 0.110
RG4-73-SS	N/A 0.0730 in	N/A 316 SS	N/A 0.120
RG4-76-SS	N/A 0.0760 in	N/A 316 SS	N/A 0.130
RG4-79-SS	N/A 0.0790 in	N/A 316 SS	N/A 0.140
RG4-81-SS	N/A 0.0810 in	N/A 316 SS	N/A 0.150
RG4-86-SS	N/A 0.0860 in	N/A 316 SS	N/A 0.170
RG4-89-SS	N/A 0.0890 in	N/A 316 SS	N/A 0.180
RG4-94-SS	N/A 0.0940 in	N/A 316 SS	N/A 0.200
RG4-96-SS	N/A 0.0960 in	N/A 316 SS	N/A 0.210
RG4-100-SS	N/A 0.1000 in	N/A 316 SS	N/A 0.230
RG4-104-SS	N/A 0.1040 in	N/A 316 SS	N/A 0.250
RG4-109-SS	N/A 0.1090 in	N/A 316 SS	N/A 0.270
RG4-113-SS	N/A 0.1130 in	N/A 316 SS	N/A 0.310
RG4-120-SS	N/A 0.1200 in	N/A 316 SS	N/A 0.340
RG4-125-SS	N/A 0.1250 in	N/A 316 SS	N/A 0.370

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First Name ^*
Last Name ^*
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No Preference
0.0039
0.0051
0.0059
0.0071
0.0079
0.0091
0.0102
0.011
0.0122
0.013
0.0142
0.015
0.016
0.017
0.018
0.019
0.02
0.021
0.022
0.023
0.024
0.025
0.026
0.027
0.028
0.029
0.031
0.032
0.033
0.035
0.037
0.038
0.039
0.04
0.041
0.042
0.043
0.047
0.052
0.055
0.06
0.063
0.0670
0.0700
0.0730
0.0760
0.0790
0.0810
0.0860
0.0890
0.0940
0.0960
0.1000
0.1040
0.1090
0.1130
0.1200
0.1250

No Preference
4
5
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8
9
10
11
12
13
14
15
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47
52
55
60
63
67
70
73
76
79
81
86
89
94
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100
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109
113
120
125

No Preference
0.00035
0.00061
0.00086
0.0012
0.0015
0.0019
0.0025
0.0028
0.0034
0.0038
0.0043
0.005
0.0055
0.0067
0.0073
0.008
0.0088
0.0096
0.011
0.012
0.013
0.014
0.016
0.017
0.018
0.019
0.022
0.024
0.025
0.028
0.031
0.032
0.033
0.036
0.038
0.039
0.041
0.048
0.059
0.068
0.081
0.088
0.100
0.110
0.120
0.130
0.140
0.150
0.170
0.180
0.200
0.210
0.230
0.250
0.270
0.310
0.340
0.370

Orifice Diameter (in)

Nominal Orifice Size

CV

Gasket Retainer

Part Number

Orifice Diameter

Material

CV

C_V

C_V