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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    The Precision Micro-Orifices® are constructed of brass or stainless steel with orifice sizes from .0003" to .005" diameter. The orifices are used to accurately meter very low flow rates of gases or liquids. Optional stainless steel screens are available to protect the tiny orifices from minute contamination particles.
Precision Micro-Orifices® NPT Connections
Precision Micro-Orifices® - NPT Connections - Line Drawing
Unit of Measure
Items Precision Micro-Orifices® NPT Connections
BLP-0C-BR
Precision Micro-Orifices® - NPT Connections 		Precision Micro-Orifices® NPT Connections
BLP-0E-BR
Precision Micro-Orifices® - NPT Connections 		Precision Micro-Orifices® NPT Connections
BLP-0G-BR
Precision Micro-Orifices® - NPT Connections 		Precision Micro-Orifices® NPT Connections
BLP-1-BR
Precision Micro-Orifices® - NPT Connections 		Precision Micro-Orifices® NPT Connections
BLP-1E-BR
Precision Micro-Orifices® - NPT Connections
Orifice Diameter N/A 0.0003 in N/A 0.0005 in N/A 0.0007 in N/A 0.0010 in N/A 0.0015 in
Material N/A Brass
Nominal Orifice Size N/A 0C N/A 0E N/A 0G N/A 1 N/A 1E
CV N/A 0.0000019 N/A 0.0000053 N/A 0.0000104 N/A 0.0000216 N/A 0.0000477
Maximum Operating Pressure N/A 2000 psig
Width Across Flats (Hex) N/A 7/16 in
Total Length N/A 0.970 in
Air Flow at Pressure - Standard Liters Per Minute (SLPM)_Sapphire N/A
Air Flow at Vacuum - Standard Liters Per Minute (SLPM)_Sapphire N/A
Air Flow at Vacuum, Choked Flow - Standard Liters Per Minute (SLPM)_Sapphire N/A
Air Flow at Pressure - Standard Cu. Ft. Per Hour (SCFH)_Sapphire N/A
Air Flow at Vacuum - Standard Cu. Ft. Per Hour (SCFH)_Sapphire N/A
Air Flow at Vacuum, Choked Flow - Standard Cu. Ft. Per Hour (SCFH)_Sapphire N/A
Air Flow at Pressure - Standard Cu. Cm. Per Minute (SCCM) N/A 5 psig: 0.50 cm³/min 10 psig: 0.72 cm³/min 15 psig: 0.90 cm³/min 20 psig: 1.08 cm³/min 25 psig: 1.24 cm³/min 30 psig: 1.40 cm³/min 40 psig: 1.74 cm³/min 50 psig: 2.09 cm³/min 60 psig: 2.42 cm³/min 70 psig: 2.76 cm³/min 80 psig: 3.09 cm³/min 90 psig: 3.45 cm³/min 100 psig: 3.80 cm³/min N/A 5 psig: 1.38 cm³/min 10 psig: 2.00 cm³/min 15 psig: 2.51 cm³/min 20 psig: 2.99 cm³/min 25 psig: 3.44 cm³/min 30 psig: 3.90 cm³/min 40 psig: 4.83 cm³/min 50 psig: 5.80 cm³/min 60 psig: 6.73 cm³/min 70 psig: 7.65 cm³/min 80 psig: 8.57 cm³/min 90 psig: 9.56 cm³/min 100 psig: 10.6 cm³/min N/A 5 psig: 2.70 cm³/min 10 psig: 3.92 cm³/min 15 psig: 4.92 cm³/min 20 psig: 5.86 cm³/min 25 psig: 6.74 cm³/min 30 psig: 7.64 cm³/min 40 psig: 9.47 cm³/min 50 psig: 11.4 cm³/min 60 psig: 13.2 cm³/min 70 psig: 15.0 cm³/min 80 psig: 16.8 cm³/min 90 psig: 18.7 cm³/min 100 psig: 20.9 cm³/min N/A 5 psig: 5.60 cm³/min 10 psig: 8.13 cm³/min 15 psig: 10.2 cm³/min 20 psig: 12.2 cm³/min 25 psig: 14.0 cm³/min 30 psig: 15.9 cm³/min 40 psig: 19.7 cm³/min 50 psig: 24.5 cm³/min 60 psig: 28.4 cm³/min 70 psig: 32.5 cm³/min 80 psig: 36.5 cm³/min 90 psig: 40.7 cm³/min 100 psig: 44.8 cm³/min N/A 5 psig: 12.4 cm³/min 10 psig: 18.0 cm³/min 15 psig: 22.2 cm³/min 20 psig: 26.7 cm³/min 25 psig: 31.0 cm³/min 30 psig: 35.3 cm³/min 40 psig: 43.8 cm³/min 50 psig: 53.2 cm³/min 60 psig: 61.8 cm³/min 70 psig: 70.2 cm³/min 80 psig: 78.9 cm³/min 90 psig: 87.4 cm³/min 100 psig: 96.1 cm³/min
Flow Accuracy at Pressure - Standard Cu. Cm. Per Minute (SCCM) N/A 25 psig: ± 0.40 cm³/min N/A 25 psig: ± 0.50 cm³/min N/A 25 psig: ± 0.60 cm³/min N/A 25 psig: ± 0.70 cm³/min N/A 25 psig: ± 1.5 cm³/min
Flow Data Status N/A Generic
Connection A N/A 1/8" NPT Male
Connection B N/A 1/8" NPT Male
Screened N/A None