Jacoby Tarbox — Sight Flow Indicators
NPT Bulls-Eye 3000#
600 – 3000 PSI Nominal · 1/4" – 2" NPT · Flapper, Plain, Drip, Rotary, Ball & Flutter Types
High Pressure NPT Bulls-Eye — Up to 3000 PSI
ASME 300, 600, 900, and 1500 Class threaded sight flow indicators for high-pressure service. Models: S-100HP (flapper), S-100HP-NF (plain), S-200HP (drip), S-300HP (rotary), S-400HP (flutter), S-100HP-FLTR. Pressure suffix: -600, -1000, -2000, -3000.
High-Pressure Design — Model Numbering
Model numbers include a pressure suffix indicating the maximum working pressure: -600, -1000, -2000, or -3000 PSI. For example, S-100HP-600 is a flapper model rated 600 PSI; S-300HP-3000 is a rotary model rated 3000 PSI. All 2000 and 3000 PSI units include a single window holder as a standard feature — a Jacoby Tarbox exclusive that protects the glass during the torquing sequence. All units are hydrotested at 1.5 times MWP prior to shipment.
Compliance & Standards
Available Models
e.g. S-100HP-600, S-100HP-1000, S-100HP-2000, S-100HP-3000
Employs a 316SS hinged weighted flapper to indicate flow of media. The velocity of the flow is indicated by the position of the flapper. Uni-directional, these units are optimal for horizontal or vertically upward flows.
Sizes
1/4" – 2" NPT
Pressure
600, 1000, 2000, or 3000 PSI (suffix indicates rating)
Temperature
-20°F to 500°F
Body
Carbon Steel standard; 316 SS available
Glass
Tempered borosilicate glass
Indicator
Flapper (uni-directional)
e.g. S-100HP-NF-600, S-100HP-NF-3000
Bi-directional and may be placed in any orientation. Used primarily in processes where spot indication is desired to detect presence of media, or to inspect color, clarity, turbidity, or other critical characteristics.
Sizes
1/4" – 2" NPT
Pressure
600, 1000, 2000, or 3000 PSI (suffix indicates rating)
Temperature
-20°F to 500°F
Body
Carbon Steel standard; 316 SS available
Glass
Tempered borosilicate glass
Indicator
None / Plain (bi-directional)
e.g. S-200HP-600, S-200HP-1000
Low, intermittent flows are easily detected with this uni-directional style in the horizontal or vertically downwards direction. The drip tube forces the process to collect on the lower lip of the 316SS tube, allowing it to visibly drip downward.
Sizes
1/4" – 2" NPT
Pressure
600, 1000, 2000, or 3000 PSI (suffix indicates rating)
Temperature
-20°F to 500°F
Body
Carbon Steel standard; 316 SS available
Glass
Tempered borosilicate glass
Indicator
Drip tube (uni-directional)
e.g. S-300HP-1000, S-300HP-3000
The TFE rotor allows for easy bi-directional, multi-orientational flow direction. The speed of the rotor indicates the relative velocity of the media. Ideal for opaque liquids or heavy gases for an easily contrasting detection at far viewing distances.
Sizes
1/4" – 2" NPT
Pressure
600, 1000, 2000, or 3000 PSI (suffix indicates rating)
Temperature
-20°F to 500°F
Body
Carbon Steel standard; 316 SS available
Glass
Tempered borosilicate glass
Indicator
TFE rotor (bi-directional)
e.g. S-400HP-600, S-400HP-1000
Flows are easily detected with this style indicator in any direction. The flow propels the TFE ball around in a random pattern inside the body and in plain view for positive identification. Ideal for liquids and gases.
Sizes
1/4" – 2" NPT
Pressure
600, 1000, 2000, or 3000 PSI (suffix indicates rating)
Temperature
-20°F to 500°F
Body
Carbon Steel standard; 316 SS available
Glass
Tempered borosilicate glass
Indicator
TFE ball (any direction)
e.g. S-100HP-FLTR-600, S-100HP-FLTR-3000
The TFE flutter allows for easy uni-directional indication of low flowing gases and liquids. The thin, ribbon type flutter curls into the pipeline, vibrating at the slightest presence of gas or liquid movement. The flow of the media is indicated by the intensity of the fluttering against the window.
Sizes
1/4" – 2" NPT
Pressure
600, 1000, 2000, or 3000 PSI (suffix indicates rating)
Temperature
-20°F to 500°F
Body
Carbon Steel standard; 316 SS available
Glass
Tempered borosilicate glass
Indicator
TFE flutter ribbon (uni-directional)
ASME Class Models — 300 / 600 / 900 / 1500
HPA-series models rated to ASME Class 300, 600, 900, and 1500 for flanged and high-integrity process connections.
Presence / absence of flow. Bi-directional, any orientation.
Class 300
S-100HPA-CL3(NF)
Class 600
S-100HPA-CL6(NF)
Class 900
S-100HPA-CL9(NF)
Class 1500
S-100HPA-CL15(NF)
Flow confirmation by flapper movement. Uni-directional, horizontal or vertical upward.
Class 300
S-100HPA-CL3
Class 600
S-100HPA-CL6
Class 900
S-100HPA-CL9
Class 1500
S-100HPA-CL15
Relative flow velocity indication. Bi-directional, any orientation.
Class 300
S-300HPA-CL3
Class 600
S-300HPA-CL6
Class 900
S-300HPA-CL9
Class 1500
S-300HPA-CL15
Condensate and partially filled lines. Uni-directional, vertical downward or horizontal.
Class 300
S-200HPA-CL3
Class 600
S-200HPA-CL6
Class 900
S-200HPA-CL9
Class 1500
S-200HPA-CL15
Gas flow / low velocity liquid flow. Uni-directional, horizontal or vertical upward.
Class 300
S-100HPA-CL3-GI
Class 600
S-100HPA-CL6-GI
Class 900
S-100HPA-CL9-GI
Class 1500
S-100HPA-CL15-GI
Specifications
| Parameter | Value |
|---|---|
| Connection | NPT, Buttweld, or Socket Weld |
| Size Range | 1/4" – 2" (codes 04 through 18) |
| Pressure Ratings | 600, 1000, 2000, or 3000 PSI (nominal) · ASME Class 300, 600, 900, 1500 |
| Temperature | -20°F to 500°F |
| Body Materials | Carbon Steel (std) · 316 SS · 316L SS · Bronze · Alloy 20 · Hastelloy C · Monel |
| Glass Type | Tempered borosilicate glass standard; UniShield®, UniGlas®, Quartz available |
| Glass Retention | Cross-bolted retainers; patented window holders on 2000 & 3000 PSI units |
| Seal Materials | PTFE standard; Neoprene, Gylon 3545, Fiber, Graphite, Viton available |
| Indicator Types | Flapper · Plain · Drip · Rotary · Ball · Flutter · Gas Indicator |
| Compliance | ASME B31.1 · ASME B31.3 · CRN (All Provinces) · API 614 · NACE MR0175 / ISO 15156-1 · PED available |
| ID Tag | Stainless steel engraved identification tag/faceplate |
| Finish | High Temperature (1000°F) finish on steel units |
| Testing | All units hydrotested at 1.5 times MWP |
Patented Window Holder — Standard on 2000 & 3000 PSI Units
All 2000 and 3000 PSI units include Jacoby Tarbox's patented single window holder as a standard feature. The window holder protects the borosilicate glass during the torquing sequence, preventing cracking or fracture from uneven bolt loading. This exclusive design feature is not available from other manufacturers and is a key reason Jacoby Tarbox high-pressure units are specified for critical service. Cross-bolted retainers are used on all pressure ratings.
Materials of Construction
Body Materials
| Material | Code | Avail. |
|---|---|---|
| Carbon Steel— Standard; high-temp finish (1000°F) applied | C | ✓ |
| 316 Stainless Steel— Available on all models and pressure ratings | S | Option |
| 316L Stainless Steel | 6L | Option |
| Bronze | B | Option |
| Alloy 20— Consult factory | A | Option |
| Hastelloy C— Consult factory | HC | Option |
| Monel— Consult factory | M | Option |
Gasket / Seal Materials
| Material | Code | Avail. |
|---|---|---|
| Neoprene | 1 | Option |
| Gylon 3545 | 2 | Option |
| Fiber | 3 | Option |
| Graphite | 4 | Option |
| Viton | 5 | Option |
| PTFE (Teflon)— Standard on all models | T | ✓ |
| Buna-N | B | Option |
| Kalrez— Consult factory | — | Option |
Window Materials
| Material | Code | Avail. |
|---|---|---|
| Tempered Borosilicate— Standard | T | ✓ |
| T-Boro w/ UniShield®— FM Approved Dual Window | 2 | Option |
| Quartz | Q | Option |
| UniGlas® w/ Steel Ring— Fused safety window | U | Option |
| UniGlas® w/ Hastelloy Ring | 6 | Option |
| UniGlas® w/ Duplex SS Ring | 9 | Option |
End Connections
| Type | Code |
|---|---|
| NPT— Standard threaded | 1 |
| Buttweld | 2 |
| Socket Weld | 3 |
Indicator wetted parts (flapper, drip tube, rotor, ball, flutter) are 316 SS or TFE as noted per model. All metals are ASTM listed. Units meet NACE MR0175 / ISO 15156-1 requirements. Temperature rating is based on the lowest-rated selected component.
How to Order — Model Code
Specify model, pipe size, pressure rating, body material, end connection, window material, and gasket. Example: S-100HP-08-3000-S-1-T-5 = Flapper, 1/2" NPT, 3000 PSI, 316 SS body, NPT connection, T-Boro glass, Viton gasket.
| Pos. | Field | Options |
|---|---|---|
| 1 | Model / Indicator Type | S-100HP (Flapper) · S-100HP-NF (Plain) · S-200HP (Drip) · S-300HP (Rotary) · S-400HP (Ball) · S-100HP-FLTR (Flutter) |
| 2 | Pipe Size | 1/4 (04) · 3/8 (06) · 1/2 (08) · 3/4 (10) · 1 (12) · 1-1/2 (16) · 2 (18) |
| 3 | Pressure Rating (PSI) | 600 · 1000 · 2000 · 3000 |
| 4 | Body Material | C = Carbon Steel (std) · S = 316 SS · 6L = 316L SS · B = Bronze · A = Alloy 20 · HC = Hastelloy C · M = Monel |
| 5 | End Connection | 1 = NPT (std) · 2 = Buttweld · 3 = Socket Weld |
| 6 | Window Material | T = T-Boro (std) · 2 = UniShield® · Q = Quartz · U = UniGlas®/Steel · 6 = UniGlas®/Hastelloy · 9 = UniGlas®/Duplex SS |
| 7 | Gasket Material | 1 = Neoprene · 2 = Gylon 3545 · 3 = Fiber · 4 = Graphite · 5 = Viton · T = PTFE (std) |
Contact Northeast Controls for special alloys, sizes outside standard range, or service conditions requiring factory review.
Typical Applications
Jacoby Tarbox high-pressure bulls-eye sight flow indicator sales
Contact us for model selection, materials, and special high-pressure requirements.
Quick RFQ
Request Pricing