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 fixed flow rate orifices contain a deformable opening which decreases in size as the pressure differential increases. The design of the unit compensates for pressure differential increase by reducing the area of the orifice resulting in constant flow over the differential pressure range 15-150 psig.
Fixed Flow Rate Orifices for Water, NPT Connections
Unit of Measure
1 2 

Part Number

End Type

Flow

Pipe Size

FFRO-2-00B0-N-CB-BN N/A NPT Female N/A 0.20 gpm N/A 1/4 in
FFRO-2-00B5-N-CB-BN N/A NPT Female N/A 0.25 gpm N/A 1/4 in
FFRO-2-00C0-N-CB-BN N/A NPT Female N/A 0.30 gpm N/A 1/4 in
FFRO-2-00D0-N-CB-BN N/A NPT Female N/A 0.40 gpm N/A 1/4 in
FFRO-2-00E0-N-CB-BN N/A NPT Female N/A 0.50 gpm N/A 1/4 in
FFRO-2-00F0-N-CB-BN N/A NPT Female N/A 0.60 gpm N/A 1/4 in
FFRO-2-00G5-N-CB-BN N/A NPT Female N/A 0.75 gpm N/A 1/4 in
FFRO-2-0100-N-CB-BN N/A NPT Female N/A 1.00 gpm N/A 1/4 in
FFRO-2-01B5-N-CB-BN N/A NPT Female N/A 1.25 gpm N/A 1/4 in
FFRO-2-01E0-N-CB-BN N/A NPT Female N/A 1.50 gpm N/A 1/4 in
FFRO-2-01G5-N-CB-BN N/A NPT Female N/A 1.75 gpm N/A 1/4 in
FFRO-2-0200-N-CB-BN N/A NPT Female N/A 2.00 gpm N/A 1/4 in
FFRO-3-00C0-N-CB-BN N/A NPT Female N/A 0.30 gpm N/A 3/8 in
FFRO-3-00D0-N-CB-BN N/A NPT Female N/A 0.40 gpm N/A 3/8 in
FFRO-3-00E0-N-CB-BN N/A NPT Female N/A 0.50 gpm N/A 3/8 in
FFRO-3-00F0-N-CB-BN N/A NPT Female N/A 0.60 gpm N/A 3/8 in
FFRO-3-00G5-N-CB-BN N/A NPT Female N/A 0.75 gpm N/A 3/8 in
FFRO-3-0100-N-CB-BN N/A NPT Female N/A 1.00 gpm N/A 3/8 in
FFRO-3-01B5-N-CB-BN N/A NPT Female N/A 1.25 gpm N/A 3/8 in
FFRO-3-01E0-N-CB-BN N/A NPT Female N/A 1.50 gpm N/A 3/8 in
FFRO-3-01G5-N-CB-BN N/A NPT Female N/A 1.75 gpm N/A 3/8 in
FFRO-3-0200-N-CB-BN N/A NPT Female N/A 2.00 gpm N/A 3/8 in
FFRO-4-00E0-N-CB-BN N/A NPT Female N/A 0.50 gpm N/A 1/2 in
FFRO-4-00F0-N-CB-BN N/A NPT Female N/A 0.60 gpm N/A 1/2 in
FFRO-4-00G5-N-CB-BN N/A NPT Female N/A 0.75 gpm N/A 1/2 in
Unit of Measure
1 2