Jerguson Gage & Valve
High Pressure Armored Level Gages
Series 32 (to 4000 PSI) · Series 40 (to 5000 PSI) · Series 51 (to 10,000 PSI) · ABS Certified · NACE MR0175
Jerguson high-pressure armored level gages cover the full range from 4000 PSI through 10,000 PSI in three series. The Series 32 (to 4000 PSI) adds recessed mid-span tie-bar supports for higher pressure ratings without blind spots, and carries ABS Certification and NACE MR0175/MR0103 compliance for marine, offshore, and sour-service applications. The Series 40 (to 5000 PSI) is a heavy-duty design with a one-piece solid bar stock chamber and interchangeable sectional covers. The Series 51 (to 10,000 PSI) is the highest-pressure glass gage in the Jerguson line — a one-piece bar stock chamber with tie-bars to resist deflection, Viton® O-ring port seals, and transparent borosilicate glass conforming to BS3463, JIS B8211, and DIN 7081.
Available Series
The Jerguson Series 32 is a high-pressure armored level gage that closely resembles the Series 20 in appearance, with the critical addition of mid-span supports (tie-bars) to achieve higher pressure ratings. The mid-span support is recessed — unlike competitive designs — so there is no blind spot in the visible length. Recessed gasket seats prevent lateral movement and gasket blow-out. ABS Certified. Wetted parts conform to NACE MR0175 and MR0103. All parts listed in ASTM and ASME B31.3.
Transparent Style shown with Optional Flanged Side Connections and T-Handle Block Valves.
Chamber Cut-a-Way Showing Tie-Bars.
Max Pressure
4000 PSI @ 100°F
Max Temperature
600°F (borosilicate) · 800°F (aluminosilicate glass option)
Glass
Reflex or transparent; tempered borosilicate per BS 3463, JIS B8211, DIN 7081
Body Material
Carbon Steel standard; 316 SS available; NACE MR0175 & MR0103 acceptable materials
Connections
1/2" or 3/4" NPT female standard; socket weld, flanged, or close hook-up optional
Certifications
ABS Certified · NACE MR0175 · NACE MR0103 · ASME B31.3
Key Features
The Jerguson Series 40 is a heavy-duty high-pressure armored level gage for the most demanding process conditions. Available in both reflex and transparent types — reflex gages are assembled with a single plain glass for greater strength. The one-piece liquid chamber is machined from solid bar steel. Interchangeable sectional gage covers and glasses are tightly locked over the liquid chamber with special bolts and nuts. Recessed gasket seats have a fine finish to provide a positively leakproof seal. The Series 40 is designed for high-pressure chemical, petrochemical, and refining applications where standard gages are not adequate.
Reflex and Transparent Style Shown.
Max Pressure
5000 PSI @ 100°F
Max Temperature
600°F (borosilicate) · 800°F (aluminosilicate glass option)
Glass
Reflex or transparent; borosilicate standard; aluminosilicate available to 800°F
Body Material
Carbon Steel standard; 316 SS available
Connections
1/2" NPT female standard; socket weld, flanged, or close hook-up optional
Certifications
NACE MR0175 compliant materials available
Key Features
The Jerguson Series 51 is a specially designed high pressure liquid level gage capable of withstanding pressures to 10,000 PSI at 100°F. The one-piece chamber is machined from solid bar stock carbon steel or stainless steel, drilled lengthwise and crosswise at each port with tie-bars left in between to resist deflection under pressure. Viton® O-rings seal each port and are seated in recessed circular channels to assure proper seating action. Available in transparent glass only. Conforms to BS3463, JIS B8211, and DIN 7081.
Max Pressure
10,000 PSI @ 100°F
Max Temperature
Per borosilicate glass rating (BS3463 / JIS B8211 / DIN 7081)
Glass
Transparent only — tempered borosilicate glass
Body Material
Carbon Steel standard; 316 SS available
Connections
1/2" NPT female standard
Certifications
Conforms to BS3463, JIS B8211, DIN 7081
Key Features
Pressure-Temperature Ratings (PSI)
| Series | Material | 100°F | 200°F | 300°F | 400°F | 500°F | 600°F |
|---|---|---|---|---|---|---|---|
| Series 32 | Carbon Steel | 4000 | 3900 | 3760 | 3550 | 3310 | 2800 |
| Series 32 | 316 SS | 3840 | 3630 | 3410 | 3200 | 2990 | 2600 |
| Series 40 | Carbon Steel | 5000 | 4870 | 4700 | 4440 | 4130 | 3500 |
| Series 40 | 316 SS | 4800 | 4540 | 4260 | 4000 | 3740 | 3250 |
| Series 51 | Carbon Steel | 10,000 | — | — | — | — | — |
| Series 51 | 316 SS | 10,000 | — | — | — | — | — |
Ratings are for the gage body. Borosilicate glass is rated to 600°F; aluminosilicate glass (available on all series) extends to 800°F. Mica shield required for steam service above 406°F (208°C). Contact NCI for exact ratings at intermediate temperatures or for special materials.
Series Comparison
| Feature | Series 32 | Series 40 | Series 51 |
|---|---|---|---|
| Max Pressure @ 100°F | 4000 PSI | 5000 PSI | 10,000 PSI |
| Max Temperature | 600°F (800°F w/ aluminosilicate) | 600°F (800°F w/ aluminosilicate) | 600°F (800°F w/ aluminosilicate) |
| Glass Types | Reflex or Transparent | Reflex or Transparent | Reflex or Transparent |
| Body Materials | CS, 316 SS | CS, 316 SS | CS, 316 SS |
| Mid-Span Supports | Yes — recessed (no blind spot) | No | No |
| ABS Certified | Yes | No | No |
| NACE MR0175 | Yes (standard) | Available | Available |
| ASME B31.3 | Yes | — | — |
| Max Sections | 8 sections (111-1/2" visible) | Multi-section; contact NCI | Multi-section; contact NCI |
| Best For | High-pressure process; marine/offshore | Very high-pressure chemical/refining | Ultra-high-pressure reactors; supercritical |
High Pressure Construction Features
One-Piece Bar Stock Chamber
No weld seams in the pressure boundary. Chamber machined from solid bar stock — A696 Grade C carbon steel or A511 TP316L stainless steel.
Forged or Bar Stock Covers
Heavy forged or bar stock covers provide maximum strength at the glass retaining interface. Alloy steel bolts and nuts (A193 B7 / A194 2H) standard.
Recessed Gasket Seats
Gasket seats are recessed in both chamber and cover. Fine finish prevents lateral movement and gasket blow-out under pressure cycling.
Tempered Borosilicate Glass
Tempered borosilicate glass per BS 3463, JIS B8211, and DIN 7080/7081. Aluminosilicate glass option extends temperature rating to 800°F.
Mid-Span Tie-Bar Supports (Series 32)
Recessed mid-span supports allow higher pressure ratings without creating a blind spot in the visible length — a key advantage over competitive designs.
Mica Shield Option
Mica shield protects glass from corrosive, caustic, or wet steam service. Required for steam above 406°F (208°C). Available on all high-pressure series.
How to Order — Model Code
Specify series, glass type, visible length, body material, connection type, connection size, glass material, and any accessories. Example: 40-R-9-1/4-C-N-1/2-A-M = Series 40, reflex glass, 9-1/4" visible, carbon steel, 1/2" NPT, aluminosilicate glass, mica shield.
| Pos. | Field | Options |
|---|---|---|
| 1 | Series | 32 · 40 · 51 |
| 2 | Glass Type | R = Reflex · T = Transparent |
| 3 | Visible Length | Specified in inches (e.g., 3-3/4", 6-1/4", 9-1/4", 12-5/8") — see series length table |
| 4 | Body Material | C = Carbon Steel (standard) · S = 316 Stainless Steel |
| 5 | Connection Type | N = NPT female (standard) · SW = Socket Weld · F = Flanged · CH = Close Hook-Up |
| 6 | Connection Size | 1/2" or 3/4" NPT; flange size as specified |
| 7 | Glass Material (optional) | Omit = borosilicate (standard) · A = Aluminosilicate (to 800°F) |
| 8 | Accessories (optional) | M = Mica Shield · I = Illuminator · D = Drain Plug · omit if not required |
Contact Northeast Controls for multi-section assemblies, special alloys, non-standard connection sizes, close hook-up configurations, or service conditions requiring factory review. The full Jerguson Glass Gage Model Number Spec Guide is available from NCI on request.
Typical Applications
High-Pressure Chemical Reactors
Series 40 and 51 for reactor vessels operating at high pressure. Series 51 rated to 10,000 PSI for the most demanding reactor conditions.
Polymerization Vessels
Ultra-high-pressure polymer reactors. Series 51 rated to 10,000 PSI for the most demanding polymerization conditions.
Hydrocracker & Hydrotreater Vessels
Series 32 and 40 for refinery hydroprocessing vessels. NACE MR0175 compliant materials for H₂S service.
High-Pressure Steam Drums
Series 32 ABS Certified for marine and offshore boiler drums. Mica shield for wet steam service.
Supercritical Fluid Processes
Series 51 for supercritical CO₂, water, and other supercritical fluid applications requiring pressures up to 10,000 PSI.
Autoclave Level Indication
Series 40 and 51 for autoclave vessels in specialty chemical, pharmaceutical, and materials processing.
Marine & Offshore (Series 32)
ABS Certified Series 32 for marine boilers, offshore platform vessels, and shipboard process equipment.
High-Pressure Gas Separators
Series 32 and 40 for gas/liquid separators in upstream oil and gas production at elevated wellhead pressures.
High pressure level gage sales & selection assistance
Contact us for series selection, P-T ratings, materials, certifications, and multi-section assemblies.
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