Northeast Controls Inc.

Jacoby-Tarbox — High Pressure Sight Flow Indicators

ASME Class Threaded — High Pressure

Class 300 / 600 / 900 / 1500 · 720 – 3600 PSI · 1/2" – 2" · Flapper, Plain, Rotor, Drip & Gas Indicator Types

The Jacoby-Tarbox HPA series provides ASME Class-rated threaded connections for high-pressure and high-integrity process applications. Unlike the standard NPT 3000# series (which uses a nominal PSI suffix), HPA models are dimensioned and rated to ASME B16.5 Class designations — Class 300, 600, 900, and 1500 — making them directly compatible with ASME-classed piping systems without adapters or reducers.

Available in five indicator types — plain, flapper, rotor, drip, and gas indicator — with a full range of body materials, window options, and seal materials. All units carry a stainless steel engraved ID tag and are hydrotested at 1.5 times MWP. Class 900 and 1500 units include Jacoby-Tarbox's patented window holder as standard.

HPA Series — ASME Class vs. NPT 3000# Ratings

The HPA series uses ASME B16.5 Class designations (CL3, CL6, CL9, CL15) rather than nominal PSI suffixes. Class 300 = 720 PSI, Class 600 = 1440 PSI, Class 900 = 2160 PSI, Class 1500 = 3600 PSI at 100°F (carbon steel). Pressure ratings derate with temperature per ASME B16.5 tables. Specify HPA models when the piping system is designed to ASME Class rather than nominal pressure ratings.

Compliance & Standards

✓ASME B31.1
✓ASME B31.3
✓ASME B16.5
✓CRN (All Provinces)
✓API 614
✓NACE MR0175 / ISO 15156-1
✓PED Available

Available Models by Indicator Type

All models available in Class 300, 600, 900, and 1500. Pressure ratings shown are for carbon steel at 100°F per ASME B16.5.

Plain (No-Flow Indicator)S-100HPA-CL3 / CL6 / CL9 / CL15(NF)

Bi-directional; any mounting orientation. Used for visual presence/absence of media, color, clarity, or turbidity inspection. No internal indicator element.

Class 300

S-100HPA-CL3(NF)

720 PSI @ 100°F

Class 600

S-100HPA-CL6(NF)

1440 PSI @ 100°F

Class 900

S-100HPA-CL9(NF)

2160 PSI @ 100°F

Class 1500

S-100HPA-CL15(NF)

3600 PSI @ 100°F

FlapperS-100HPA-CL3 / CL6 / CL9 / CL15

Uni-directional; horizontal or vertical upward flow. A 316SS hinged weighted flapper indicates flow velocity by its angular position. Optimal for liquid and steam service.

Class 300

S-100HPA-CL3

720 PSI @ 100°F

Class 600

S-100HPA-CL6

1440 PSI @ 100°F

Class 900

S-100HPA-CL9

2160 PSI @ 100°F

Class 1500

S-100HPA-CL15

3600 PSI @ 100°F

RotorS-300HPA-CL3 / CL6 / CL9 / CL15

Bi-directional; any orientation. A TFE rotor spins in proportion to flow velocity, providing relative rate indication. Ideal for opaque liquids or heavy gases at long viewing distances.

Class 300

S-300HPA-CL3

720 PSI @ 100°F

Class 600

S-300HPA-CL6

1440 PSI @ 100°F

Class 900

S-300HPA-CL9

2160 PSI @ 100°F

Class 1500

S-300HPA-CL15

3600 PSI @ 100°F

DripS-200HPA-CL3 / CL6 / CL9 / CL15

Uni-directional; vertical downward or horizontal. A 316SS drip tube forces condensate or low-flow liquid to collect on the lower lip and drip visibly downward. Suited for condensate and partially filled lines.

Class 300

S-200HPA-CL3

720 PSI @ 100°F

Class 600

S-200HPA-CL6

1440 PSI @ 100°F

Class 900

S-200HPA-CL9

2160 PSI @ 100°F

Class 1500

S-200HPA-CL15

3600 PSI @ 100°F

Gas IndicatorS-100HPA-CL3 / CL6 / CL9 / CL15-GI

Uni-directional; horizontal or vertical upward. Designed for gas flow and very low velocity liquid flow. A lightweight indicator element responds to minimal flow energy.

Class 300

S-100HPA-CL3-GI

720 PSI @ 100°F

Class 600

S-100HPA-CL6-GI

1440 PSI @ 100°F

Class 900

S-100HPA-CL9-GI

2160 PSI @ 100°F

Class 1500

S-100HPA-CL15-GI

3600 PSI @ 100°F

Specifications

ParameterValue
Connection TypeASME Class threaded (HPA series) — Class 300, 600, 900, 1500
Pipe Size Range1/2" – 2"
Pressure RatingsClass 300 (720 PSI) · Class 600 (1440 PSI) · Class 900 (2160 PSI) · Class 1500 (3600 PSI) @ 100°F
Temperature Range-20°F to 500°F
Body MaterialsCarbon Steel (std) · 316 SS · 316L SS · Bronze · Alloy 20 · Hastelloy C · Monel
Glass TypeTempered borosilicate standard; UniShield®, UniGlas®, Quartz available
Glass RetentionCross-bolted retainers; patented window holder on Class 900 & 1500 units
Seal MaterialsPTFE standard; Neoprene, Gylon 3545, Fiber, Graphite, Viton, Buna-N available
Indicator TypesPlain (NF) · Flapper · Rotor · Drip · Gas Indicator
ComplianceASME B31.1 · ASME B31.3 · CRN (All Provinces) · API 614 · NACE MR0175 / ISO 15156-1 · PED available
ID TagStainless steel engraved identification tag/faceplate
FinishHigh Temperature (1000°F) finish on carbon steel units
TestingAll units hydrotested at 1.5× MWP prior to shipment

Patented Window Holder — Standard on Class 900 & 1500 Units

Class 900 and 1500 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 class ratings.

Materials of Construction

Body Materials

MaterialCodeAvail.
Carbon Steel— High-temp finish (1000°F) appliedC✓ Standard
316 Stainless SteelSOption
316L Stainless Steel6LOption
BronzeBOption
Alloy 20— Consult factoryAOption
Hastelloy C— Consult factoryHCOption
Monel— Consult factoryMOption

Gasket / Seal Materials

MaterialCodeAvail.
PTFE (Teflon)T✓ Standard
Neoprene1Option
Gylon 35452Option
Fiber3Option
Graphite4Option
Viton5Option
Buna-NBOption
Kalrez— Consult factory—Option

Window Materials

MaterialCodeAvail.
Tempered BorosilicateT✓ Standard
T-Boro w/ UniShield®— FM Approved Dual Window2Option
QuartzQOption
UniGlas® w/ Steel Ring— Fused safety windowUOption
UniGlas® w/ Hastelloy Ring6Option
UniGlas® w/ Duplex SS Ring9Option

Indicator wetted parts (flapper, drip tube, rotor) 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 series, ASME class, indicator suffix, body material, window material, and gasket. Example: S-100HPA-CL9-S-T-5 = Flapper, Class 900, 316 SS body, T-Boro glass, Viton gasket.

Pos.FieldOptions
1Series / Indicator TypeS-100HPA (Flapper/Plain/GI) · S-200HPA (Drip) · S-300HPA (Rotor)
2ASME ClassCL3 = Class 300 · CL6 = Class 600 · CL9 = Class 900 · CL15 = Class 1500
3Indicator Suffix(NF) = Plain/No-Flow · -GI = Gas Indicator · (blank) = Flapper or Rotor
4Body MaterialC = Carbon Steel (std) · S = 316 SS · 6L = 316L SS · B = Bronze · A = Alloy 20 · HC = Hastelloy C · M = Monel
5Window MaterialT = T-Boro (std) · 2 = UniShield® · Q = Quartz · U = UniGlas®/Steel · 6 = UniGlas®/Hastelloy · 9 = UniGlas®/Duplex SS
6Gasket Material1 = Neoprene · 2 = Gylon 3545 · 3 = Fiber · 4 = Graphite · 5 = Viton · T = PTFE (std) · B = Buna-N

Contact Northeast Controls for special alloys, sizes outside standard range, or service conditions requiring factory review.

Typical Applications

→High-pressure steam and condensate lines
→Boiler feedwater systems
→Compressor lube oil systems
→Hydraulic power units
→High-pressure chemical injection
→Offshore and subsea pipelines
→Refinery process piping
→Pump seal flush monitoring
→High-pressure water systems
→API 614 lube and seal oil systems
→NACE-compliant sour service
→High-integrity process connections

Jacoby-Tarbox ASME Class threaded sight flow indicator sales

Contact us for model selection, materials, and special high-pressure requirements.

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