Designed for applications with maximum operating pressure of 400 psig (27.6 bar) and/or temperature of 350ºF (177ºC). Special high-temperature seals are also available; consult factory for details. Flanged sight flow indicators have been engineered to meet the demands of a variety of industrial processes, including chemical and petrochemical applications.
Drip Tube – Ideal for gravity, extremely low or intermittent flow. Keeps product from dripping on the glass. Assures constant see-through for vertical lines.
Propeller – The best way to show flow of opaque liquids. Ideal for observation at a distance. Flow from right to left is standard. Specify if left to right flow is needed. Not recommended for flow rates above 100 GPM.
Bi-Directional Flapper – This indicator points in either direction to show you at a glance which way the liquid is flowing.
Bi-Directional Plain – When the color and clarity of your liquid are of prime importance.
Click on the title below to view the technical information.
| Indicator Option 4" (Low Flow Orifice Plate) Minimum Flow Requirement to Turn Propeller | |||||||
| Size | 1/4 | 3/8 | 1/2 | ||||
| Minimum Flow* Required to Turn Propeller | ||||||||
| Size | 1/4 | 3/8 | 1/2 | 3/4 | 1 | 1-1/4 | 1-1/2 | 2 |
| GPM | .14 | .25 | .30 | .60 | .70 | 1.05 | 1.25 | 1.30 |
| *VISI-Flo installed in horizontal position with deflector opening down. | ||||||||
| VISI-FLO® | Max. Pressure | Max Temperature1 |
| 1400 Series Threaded/ Flanged (1/4"-4") | 200 PSIG @ 150°F | 250°F @ 135 PSIG |
| 1400 Series Flanged (6-12") | 150 PSIG @ 150°F | 150°F @ 150 PSIG |
| 1500 Series Threaded (1/4"-2") | 400 PSIG @ 150°F | 400°F @ 160 PSIG |
| 1500 Series Flanged (3/4"-4") | 285 PSIG @ 100°F4 | 400°F @ 200 PSIG3 |
| 1500 Series Flanged (6"-12") | 275 PSIG @ 100°F | 400°F @ 200 PSIG2 |
1 With Standard seals 2 Stainless Steel Units Rated @ 195 PSIG 3 Stainless Steel Units Rated @ 195 PSIG 4 Stainless Steel Units Rated @ 275 PSIG Notes: Alternate seals may result in higher operating temps. Temps up to 500°F possible with High-Temp PTFE Seals 1500 Series units supplied with Canadian Registration Numbers (CRN) carry a 100 PSIG Maximum Allowable Working Pressure at Max Temp of 400F/204C. | ||
| SEAL AND INDICATOR OPERATING TEMPERATURES | ||
| Material | Degrees F | Degrees C |
| Neoprene (1400 series standard) | -20 to 250 | -29 to 121 |
| Fluorocarbon (1500 series standard) | -20 to 400 | -29 to 204 |
| Buna-N | -20 to 212 | -29 to 100 |
| EPDM | -50 to 250 | -46 to 121 |
| PTFE | -40 to 400 | -40 to 204 |
| Kalrez® | 0 to 500 | -18 to 260 |
| Indicators | ||
| Delrin® | -40 to 250 | -40 to 121 |
| Ryton® | -40 to 450 | -40 to 232 |
| PTFE | -40 to 500 | -40 to 260 |
| High-Temp PTFE / Kalrez® | -40 to 500 | -40 to 260 |
| SEAL AND INDICATOR OPERATING TEMPERATURES | ||
| Material | Degrees F | Degrees C |
| Neoprene (1400 series standard) | -20 to 250 | -29 to 121 |
| Fluorocarbon (1500 series standard) | 0 to 400 | -17 to 204 |
| Buna-N | -20 to 212 | -29 to 100 |
| EPDM | -50 to 250 | -46 to 121 |
| PTFE | -40 to 400 | -40 to 204 |
| Kalrez® | 0 to 500 | -18 to 260 |
| Indicators | ||
| Delrin® | -40 to 250 | -40 to 121 |
| Ryton® | -40 to 450 | -40 to 232 |
| PTFE | -40 to 500 | -40 to 260 |
| Minimum Flow* Required to Turn Propeller | ||||||||
| Size | 1/4 | 3/8 | 1/2 | 3/4 | 1 | 1-1/4 | 1-1/2 | 2 |
| GPM | .14 | .25 | .30 | .60 | .70 | 1.05 | 1.25 | 1.30 |
| *VISI-Flo installed in horizontal position with deflector opening down. | ||||||||
| Max Pressure (psi) | Test Procedure | ANSI Rated? | |
| ¼” – 2” Threaded 1400 Series | 200 | A | |
| ¼” – 2” Threaded 1500 Series | 600 | B | |
| 1” to 12” Flanged 1400 & 1500 Series | 200/275 | C | |
| * All flanged VISI-FLO meet requirements for 150 lb. ANSI Flanges. | |||
A = Test at 160 psi +/- 25 psi for one minute. Test at 400 psi +/- 50 psi for one minute B = Test at 160 psi +/- 25 psi for one minute. Test at 650 psi +/- 50 psi for one minute C = Test at 500 psi +/- 50 psi for a period of time specified as per ANSI: 1”, 1½”, 2” sizes for a minimum of 1 minute 3”, 4”, 6” 8” sizes for a minimum of 2 minutes 10” & 12” sizes for a minimum of 3 minutes
One of the key strengths of sight flow indicators is their remarkable versatility. For example, they can be used:
Following are a series of examples where sight flow indicators can be applied.
Power Plants
Waste Water Treatment
VISI-FLO® sight flow indicators visually monitor the filtering process. The most common point of installation: second stage aeration tank pumping lines. The purpose: verify sludge removal to ensure efficient aeration.
Petroleum Industry
Sight flow indicators visually monitor drilling pump operations. VISI-FLO® is used to show dirty fluids being pumped from a down-hole hydraulic cleaning process. Should the indicator stop, this is a signal to the operator that the system is not cleaning properly and needs corrective action.
Chemical Industry
Manufacturing
VISI-FLO® sight flow indicators are used in a variety of manufacturing applications, including, for example, to monitor:
OEM Markets
VISI-FLO® sight flow indicators are used in an array of OEM applications, including, for example:
| Key | Description | Series | 1/4", 3/8" & 1/2" | 3/4" & 1" | 1 1/4", 1 1/2" & 2" |
| 1 | Retaining Bolt | 1400 1500 | H40190M H30497M | H40191M H30498M | H40191M H30498M |
| 2 | Washer | 1400 & 1500 | H40193M | H40194M | H40194M |
| 3 | Nameplate | 1400 & 1500 | H30756M | H30757M | H30758M |
| 4 | Cap, Plated Steel | 1400 1500 | H2888M H30448M | H2889M H30449M | H2890M H30450M |
| 5 | Gasket* | 1400 & 1500 | H3870M | H3871M | H3873M |
| 6 | Glass* | 1400 1500 | H5997M H5998M | H6001M H6002M | H10152M H10153M |
| 7 | Seal* | See Repair Kits | |||
| 8 | Retaining Bridge (2 Required Per Unit) | 1400 & 1500 | H5996M | H6000M | H6004M |
| 9 | Indicator | ||||
| Propeller-Delrin | 1400 | H40153M | H40152M | H40141M | |
| Propeller-Ryton | 1500 | H2910M | H2911M | H2912M | |
| Propeller-PTFE | 1400 & 1500 | H40171M | H40172M | H40173M | |
| Flapper-Delrin | 1400 | H40150M | H40149M | H40148M | |
| Flapper-Ryton | 1500 | H2944M | H2947M | H2948M | |
| Flapper-PTFE | 1400 & 1500 | H40196M | H40197M | H40198M | |
| 10 | Shaft | 1400 & 1500 | H5999M | H6003M | H6011M |
| 11 | Seal* | See Repair Kits | |||
| 12 | Spacer, PTFE* | 1400 & 1500 | H31752M | H31753M | H31636M |
| 13 | Body | ||||
| 14 | Drip Tube | 1400 & 1500 | H30357RS | H30359RP | H30354RP |
| 15 | Deflector (Propeller Units Only) | 1400 & 1500 | H5012M | H5018M | H5020M |
| Key | Description | Series | 3" & 4" | 6"-12" |
| 1 | Retaining Bolt | 1400 & 1500 | H40192M | H40109M |
| 2 | Washer | 1400 & 1500 | H40195M | H40194M |
| 3 | Nameplate | 1400 & 1500 | C20190M | C20191M |
| 4 | Cap, Plated Steel | 1400 & 1500 | C20136M | C30012RS |
| 5 | Gasket* | 1400 & 1500 | H3874M | H40108M |
| 6 | Glass* | 1400 1500 | C00665M C00667M | H40107M H30368M |
| 7 | Seal* | See Repair Kits | ||
| 8 | Button, PTFE | 1400 & 1500 | H40157P | H40117RP |
| 9 | Indicator | |||
| Propeller-Delrin | 1400 | H40154M | NA | |
| Propeller-Ryton | 1500 | H40158P | NA | |
| Propeller-PTFE | 1400 & 1500 | H40174M | NA | |
| Flapper-Delrin | 1400 | H40148M | NA | |
| Flapper-Ryton | 1500 | H2948M | NA | |
| Flapper-PTFE | 1400 & 1500 | H40198M | NA | |
| 10 | Shaft | 1400 & 1500 | H40155M | H40116RE |
| 11 | Lockwasher, SST | 1400 & 1500 | H5162M | |
| 12 | Retaining Screw/Bolt | 1400 & 1500 | H40155M | H40144RP |
| 13 | Body | |||
| 14 | Drip Tube | |||
| 15 | Indicator Support Arm | 1400 & 1500 | C30025EW | H40114RS |
Click on the title below to view the technical information.
| Indicator Option 4" (Low Flow Orifice Plate) Minimum Flow Requirement to Turn Propeller | |||||||
| Size | 1/4 | 3/8 | 1/2 | ||||
| Minimum Flow* Required to Turn Propeller | ||||||||
| Size | 1/4 | 3/8 | 1/2 | 3/4 | 1 | 1-1/4 | 1-1/2 | 2 |
| GPM | .14 | .25 | .30 | .60 | .70 | 1.05 | 1.25 | 1.30 |
| *VISI-Flo installed in horizontal position with deflector opening down. | ||||||||
| VISI-FLO® | Max. Pressure | Max Temperature1 |
| 1400 Series Threaded/ Flanged (1/4"-4") | 200 PSIG @ 150°F | 250°F @ 135 PSIG |
| 1400 Series Flanged (6-12") | 150 PSIG @ 150°F | 150°F @ 150 PSIG |
| 1500 Series Threaded (1/4"-2") | 400 PSIG @ 150°F | 400°F @ 160 PSIG |
| 1500 Series Flanged (3/4"-4") | 285 PSIG @ 100°F4 | 400°F @ 200 PSIG3 |
| 1500 Series Flanged (6"-12") | 275 PSIG @ 100°F | 400°F @ 200 PSIG2 |
1 With Standard seals 2 Stainless Steel Units Rated @ 195 PSIG 3 Stainless Steel Units Rated @ 195 PSIG 4 Stainless Steel Units Rated @ 275 PSIG Notes: Alternate seals may result in higher operating temps. Temps up to 500°F possible with High-Temp PTFE Seals 1500 Series units supplied with Canadian Registration Numbers (CRN) carry a 100 PSIG Maximum Allowable Working Pressure at Max Temp of 400F/204C. | ||
| SEAL AND INDICATOR OPERATING TEMPERATURES | ||
| Material | Degrees F | Degrees C |
| Neoprene (1400 series standard) | -20 to 250 | -29 to 121 |
| Fluorocarbon (1500 series standard) | -20 to 400 | -29 to 204 |
| Buna-N | -20 to 212 | -29 to 100 |
| EPDM | -50 to 250 | -46 to 121 |
| PTFE | -40 to 400 | -40 to 204 |
| Kalrez® | 0 to 500 | -18 to 260 |
| Indicators | ||
| Delrin® | -40 to 250 | -40 to 121 |
| Ryton® | -40 to 450 | -40 to 232 |
| PTFE | -40 to 500 | -40 to 260 |
| High-Temp PTFE / Kalrez® | -40 to 500 | -40 to 260 |
| SEAL AND INDICATOR OPERATING TEMPERATURES | ||
| Material | Degrees F | Degrees C |
| Neoprene (1400 series standard) | -20 to 250 | -29 to 121 |
| Fluorocarbon (1500 series standard) | 0 to 400 | -17 to 204 |
| Buna-N | -20 to 212 | -29 to 100 |
| EPDM | -50 to 250 | -46 to 121 |
| PTFE | -40 to 400 | -40 to 204 |
| Kalrez® | 0 to 500 | -18 to 260 |
| Indicators | ||
| Delrin® | -40 to 250 | -40 to 121 |
| Ryton® | -40 to 450 | -40 to 232 |
| PTFE | -40 to 500 | -40 to 260 |
| Minimum Flow* Required to Turn Propeller | ||||||||
| Size | 1/4 | 3/8 | 1/2 | 3/4 | 1 | 1-1/4 | 1-1/2 | 2 |
| GPM | .14 | .25 | .30 | .60 | .70 | 1.05 | 1.25 | 1.30 |
| *VISI-Flo installed in horizontal position with deflector opening down. | ||||||||
| Max Pressure (psi) | Test Procedure | ANSI Rated? | |
| ¼” – 2” Threaded 1400 Series | 200 | A | |
| ¼” – 2” Threaded 1500 Series | 600 | B | |
| 1” to 12” Flanged 1400 & 1500 Series | 200/275 | C | |
| * All flanged VISI-FLO meet requirements for 150 lb. ANSI Flanges. | |||
A = Test at 160 psi +/- 25 psi for one minute. Test at 400 psi +/- 50 psi for one minute B = Test at 160 psi +/- 25 psi for one minute. Test at 650 psi +/- 50 psi for one minute C = Test at 500 psi +/- 50 psi for a period of time specified as per ANSI: 1”, 1½”, 2” sizes for a minimum of 1 minute 3”, 4”, 6” 8” sizes for a minimum of 2 minutes 10” & 12” sizes for a minimum of 3 minutes
One of the key strengths of sight flow indicators is their remarkable versatility. For example, they can be used:
Following are a series of examples where sight flow indicators can be applied.
Power Plants
Waste Water Treatment
VISI-FLO® sight flow indicators visually monitor the filtering process. The most common point of installation: second stage aeration tank pumping lines. The purpose: verify sludge removal to ensure efficient aeration.
Petroleum Industry
Sight flow indicators visually monitor drilling pump operations. VISI-FLO® is used to show dirty fluids being pumped from a down-hole hydraulic cleaning process. Should the indicator stop, this is a signal to the operator that the system is not cleaning properly and needs corrective action.
Chemical Industry
Manufacturing
VISI-FLO® sight flow indicators are used in a variety of manufacturing applications, including, for example, to monitor:
OEM Markets
VISI-FLO® sight flow indicators are used in an array of OEM applications, including, for example:
| Key | Description | Series | 1/4", 3/8" & 1/2" | 3/4" & 1" | 1 1/4", 1 1/2" & 2" |
| 1 | Retaining Bolt | 1400 1500 | H40190M H30497M | H40191M H30498M | H40191M H30498M |
| 2 | Washer | 1400 & 1500 | H40193M | H40194M | H40194M |
| 3 | Nameplate | 1400 & 1500 | H30756M | H30757M | H30758M |
| 4 | Cap, Plated Steel | 1400 1500 | H2888M H30448M | H2889M H30449M | H2890M H30450M |
| 5 | Gasket* | 1400 & 1500 | H3870M | H3871M | H3873M |
| 6 | Glass* | 1400 1500 | H5997M H5998M | H6001M H6002M | H10152M H10153M |
| 7 | Seal* | See Repair Kits | |||
| 8 | Retaining Bridge (2 Required Per Unit) | 1400 & 1500 | H5996M | H6000M | H6004M |
| 9 | Indicator | ||||
| Propeller-Delrin | 1400 | H40153M | H40152M | H40141M | |
| Propeller-Ryton | 1500 | H2910M | H2911M | H2912M | |
| Propeller-PTFE | 1400 & 1500 | H40171M | H40172M | H40173M | |
| Flapper-Delrin | 1400 | H40150M | H40149M | H40148M | |
| Flapper-Ryton | 1500 | H2944M | H2947M | H2948M | |
| Flapper-PTFE | 1400 & 1500 | H40196M | H40197M | H40198M | |
| 10 | Shaft | 1400 & 1500 | H5999M | H6003M | H6011M |
| 11 | Seal* | See Repair Kits | |||
| 12 | Spacer, PTFE* | 1400 & 1500 | H31752M | H31753M | H31636M |
| 13 | Body | ||||
| 14 | Drip Tube | 1400 & 1500 | H30357RS | H30359RP | H30354RP |
| 15 | Deflector (Propeller Units Only) | 1400 & 1500 | H5012M | H5018M | H5020M |
| Key | Description | Series | 3" & 4" | 6"-12" |
| 1 | Retaining Bolt | 1400 & 1500 | H40192M | H40109M |
| 2 | Washer | 1400 & 1500 | H40195M | H40194M |
| 3 | Nameplate | 1400 & 1500 | C20190M | C20191M |
| 4 | Cap, Plated Steel | 1400 & 1500 | C20136M | C30012RS |
| 5 | Gasket* | 1400 & 1500 | H3874M | H40108M |
| 6 | Glass* | 1400 1500 | C00665M C00667M | H40107M H30368M |
| 7 | Seal* | See Repair Kits | ||
| 8 | Button, PTFE | 1400 & 1500 | H40157P | H40117RP |
| 9 | Indicator | |||
| Propeller-Delrin | 1400 | H40154M | NA | |
| Propeller-Ryton | 1500 | H40158P | NA | |
| Propeller-PTFE | 1400 & 1500 | H40174M | NA | |
| Flapper-Delrin | 1400 | H40148M | NA | |
| Flapper-Ryton | 1500 | H2948M | NA | |
| Flapper-PTFE | 1400 & 1500 | H40198M | NA | |
| 10 | Shaft | 1400 & 1500 | H40155M | H40116RE |
| 11 | Lockwasher, SST | 1400 & 1500 | H5162M | |
| 12 | Retaining Screw/Bolt | 1400 & 1500 | H40155M | H40144RP |
| 13 | Body | |||
| 14 | Drip Tube | |||
| 15 | Indicator Support Arm | 1400 & 1500 | C30025EW | H40114RS |