Threaded Flow Indicators

Flow indicators with threads for pipe connections. These models offer view inside any pipeline through back and front windows. Flapper style indicators are recommended for monitoring either horizontal or vertical lines with upward flow. Rotators style indicators are best for quick visual assessment if there is any flow in a pipeline. The rotator wheel has high contact against fluids of any color. Drip tube indicators are for vertical lines with downward flow direction having low or intermittent flow rates, such as distillation process. Plain view indicators can be installed in any position to observe flow in any direction, or to detect the presence or absence of solutions.

L.J. Star, Inc

Plain Style NPT Threaded Flow Indicators, Carbon Steel or 316 Stainless Housings

Visual flow indicators with NPT threaded female ports. Thread form complies with the ASME B1.20.1 standard, in carbon steel or 316 stainless housings. Designed with front and back windows for backlighting making it easy to see flow variations inside any pipeline, even when used with dark liquids. There are no inserts between the two windows, these flow indicators are best suited for - non-homogeneous fluids to see bubbles, color changes and any indication of flow variations within the fluid.

These flow indicators are installed in-line of the pipeline between two threaded pipe ends. This model offers pipeline view through toughened borosilicate glass windows internally sealed to the metal housing with flat gaskets. May be installed in any position to observe flow in any direction. These indicators are usually employed to detect either the presence or absence of solutions, or to observe fluids for turbulence, color or clarity.

ThreadASME ClassAperture Dia.Housing MaterialGasket MaterialFlow Indicator StyleMfg. P/N.Encole P/N.Price
NPT 1/2"1501.250 inchCarbon SteelNeopreneFlapper1104 CNNN1N296A1000$271.40each
NPT 1/2"1501.250 inchAISI 316PTFEPlain View1104 SHNN1N297A1000$396.00each
NPT 1/2"3001.250 inchCarbon SteelNeoprenePlain View2104 CNNN1N298A1000$332.40each
NPT 1/2"3001.250 inchAISI 316PTFEPlain View2104 SHNN1N299A1000$460.80each
NPT 3/4"1501.250 inchCarbon SteelNeoprenePlain View1106 CNNN1N296A1001$271.40each
NPT 1"1501.250 inchCarbon SteelNeoprenePlain View1108 CNNN1N296A1002$285.20each
NPT 1-1/2"1501.750 inchCarbon SteelNeoprenePlain View1112 CNNN1N296A1003$365.70each
NPT 2"1502.000 inchCarbon SteelNeoprenePlain View1116 CNNN1N296A1004$474.95each
NPT 3/4"1501.250 inchAISI 316PTFEPlain View1106 SHNN1N297A1001$396.00each
NPT 1"1501.250 inchAISI 316PTFEPlain View1108 SHNN1N297A1002$460.80each
NPT 1-1/2"1501.750 inchAISI 316PTFEPlain View1112SHNN1N297A1003$608.40each
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L.J. Star, Inc

Drip Tube NPT Threaded Flow Indicators, Carbon Steel or 316 Stainless Housings

Drip tube style visual flow indicators with NPT threaded female ports. Thread form complies with the ASME B1.20.1 standard.

Best suited for vertical lines with downward flow direction. Designed with front and back windows for backlighting making it easy to see flow variations inside any pipeline, even when used with dark liquids. These units are particularly recommended for applications having low or intermittent flow rates, such as distillation process.

These flow indicators are installed in-line of the pipeline between two threaded pipe ends.

Optional window materials include pre-stressed safety glass or quartz.
Optional gasket materials include Buna-N, Viton, Gylon, silicone, graphite and non-asbestos gaskets.
Standard Safety and Maintenance Features include: Independently bolted glass retainers; Acrylic enamel coating surface finish for carbon steel housings and investment cast finish for 316 stainless housings.

ThreadASME ClassAperture Dia.Housing MaterialGasket MaterialFlow Indicator StyleMfg. P/N.Encole P/N.Price
NPT 1/2"1501.250 inchCarbon SteelNeopreneDrip Tube1204 CNNN1N300A1000$330.40each
NPT 1/2"1501.250 inchAISI 316PTFEDrip Tube1204 SHNN1N301A1000$462.00each
NPT 1/2"3001.250 inchCarbon SteelNeopreneDrip Tube2204 CNNN1N303A1000$346.25each
NPT 1/2"3001.250 inchAISI 316PTFEDrip Tube2204 SHNN1N302A1000$480.00each
NPT 3/4"1501.250 inchCarbon SteelNeopreneDrip Tube1206 CNNN1N300A1001$330.40each
NPT 3/4"1501.250 inchAISI 316PTFEDrip Tube1206 SHNN1N301A1001$462.00each
NPT 1"1501.250 inchAISI 316PTFEDrip Tube1208 SHNN1N301A1002$537.60each
NPT 1-1/2"1501.750 inchAISI 316PTFEDrip Tube1212 SHNN1N301A1003$709.80each
NPT 2"1502.000 inchAISI 316PTFEDrip Tube1216 SHNN1N301A1004$849.80each
NPT 3/4"3001.250 inchAISI 316PTFEDrip Tube2206 SHNN1N302A1001$480.00each
NPT 1"3001.250 inchAISI 316PTFEDrip Tube2208 SHNN1N302A1002$626.25each
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L.J. Star, Inc

Paddle NPT Threaded Flow Indicators, Carbon Steel or 316 Stainless Housings

There is a flapper paddle between the two windows enabling to quickly see if there is any flow going through the pipe. Recommended for monitoring either horizontal or vertical lines with upward flow. The flapper position indicates current flow rate. Flapper style indicators are the appropriate choice for use with clear and semi-opaque solutions.

ThreadASME ClassAperture Dia.Housing MaterialGasket MaterialFlow Indicator StyleMfg. P/N.Encole P/N.Price
NPT 1/2"1501.250 inchCarbon SteelNeopreneFlapperNot Available311A1000$295.00each
NPT 1/2"1501.250 inchAISI 316PTFEFlapper1304 SHNN1N309A1000$412.50each
NPT 1/2"3001.250 inchCarbon SteelNeopreneFlapper2304 CNNN1N308A1000$312.70each
NPT 3/4"1501.250 inchCarbon SteelNeopreneFlapper1306 CNNN1N311A1001$295.00each
NPT 1"1501.250 inchCarbon SteelNeopreneFlapper1308 CNNN1N311A1002$310.00each
NPT 1-1/2"1501.750 inchCarbon SteelNeopreneFlapper1312 CNNN1N311A1003$397.50each
NPT 2"1502.000 inchCarbon SteelNeopreneFlapper1316 CNNN1N311A1004$516.25each
NPT 3/4"1501.250 inchAISI 316PTFEFlapper1306 SHNN1N309A1001$412.50each
NPT 1"1501.250 inchAISI 316PTFEFlapper1308 SHNN1N309A1002$480.00each
NPT 1-1/2"1501.750 inchAISI 316PTFEFlapper1312 SHNN1N309A1003$633.75each
NPT 2"1502.000 inchAISI 316PTFEFlapper1316 SHNN1N309A1004$758.75each
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L.J. Star, Inc

Rotator NPT Threaded Flow Indicators, Carbon Steel or 316 Stainless Housings

Visual flow indicators with NPT threaded female ports and a rotator wheel in the flow path. Thread form complies with the ASME B1.20.1 standard. Designed with front and back windows for backlighting making it easy to see flow variations inside any pipeline, even when used with dark liquids.

There is a rotating wheel between the two windows enabling to quickly see if there is any flow going through the pipe. The visibility of the rotor motion makes this style particularly well suited for monitoring clear, translucent or solutions with dark colors, as the rotator is clearly distinguished from the background of the fluid.

ThreadASME ClassAperture Dia.Housing MaterialGasket MaterialFlow Indicator StyleMfg. P/N.Encole P/N.Price
NPT 1/2"3001.250 inchAISI 316PTFERotator2404 SHNN1N306A1000$545.45each
NPT 1/2"1501.250 inchCarbon SteelNeopreneRotator1404 CNNN1N304A1000$300.24each
NPT 1/2"1501.250 inchAISI 316PTFERotator1404 SHNN1N305A1000$412.50each
NPT 1/2"3001.250 inchCarbon SteelNeopreneRotator2404 CNNN1N307A1000$376.25each
NPT 3/4"1501.250 inchAISI 316PTFERotator1406 SHNN1N305A1001$412.50each
NPT 1"1501.250 inchAISI 316PTFERotator1408 SHNN1N305A1002$480.00each
NPT 1-1/2"1501.750 inchAISI 316PTFERotator1412 SHNN1N305A1003$603.75each
NPT 2"1502.000 inchAISI 316PTFERotator1416 SHNN1N305A1004$738.75each
NPT 3/4"3001.250 inchCarbon SteelNeopreneRotator2406 CNNN1N307A1001$376.25each
NPT 1"3001.250 inchCarbon SteelNeopreneRotator2408 CNNN1N307A1002$426.25each
NPT 1-1/2"3001.750 inchCarbon SteelNeopreneRotator2414 CNNN1N307A1003$529.75each
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