Clark Reliance Flat Glass Level Gages & DuraStar™ Illuminator — FG Series — Northeast Controls Inc.
Northeast Controls Inc.

Clark Reliance — Level Gages

Flat Glass Water Gages & DuraStar™ Illuminator

Reliance® FG Series · 450 to 2000 PSI · Single, Double & Multi-Section · ASME Section I Compliant

Reliance® flat glass water gages provide direct visual indication of liquid level in boilers and pressure vessels. Precision manufacturing of these time-tested designs assures outstanding performance and service life. All models comply with ASME Section I requirements.

→Single, double, or up to six windows
→Wide-body construction for added strength and rigidity
→Tempered flat glass resistant to thermal shock
→Surface trueness testing prior to assembly
→Mica shield protection for steam applications
→Finger-clamps providing uniform perpendicular loading
→Easy dismantling for cleaning and servicing
→5/8" (15.9 mm) wide visibility slot for improved readability
→Borosilicate glass on 450, 900 & 1500 PSI models
→Aluminosilicate glass on 2000 PSI models
→Live loading option available (add "P" suffix) for FG1500/FG2000
→Complies with ASME Section I requirements
Cut-away of FG Series flat glass gage showing tempered borosilicate glass, carbon steel body, mica shields, Grafoil seal gaskets, non-asbestos cushion gaskets, finger clamps, heavy duty 2H nuts, steel cover plate, and high tensile B7 studs

Gages to 450 PSI (31 Bar)

Borosilicate Glass

Single Window

ModelVisibility (in / mm)Min. Centers (in / mm)
FG4046-5/8" (168)14" (356)
FG4057-3/4" (197)16" (406)
FG4069" (229)17" (432)
FG40710-1/8" (257)18" (457)
FG40811-3/4" (298)20" (508)
FG40912-1/2" (318)20" (508)

Double Window

ModelVisibility (in / mm)Min. Centers (in / mm)
FG46615" (381)24" (610)
FG47717-1/2" (444)26" (660)
FG48820" (508)29" (737)
FG49921-1/2" (546)30" (762)

Gages to 900 PSI (62.1 Bar)

Borosilicate Glass

Minimum centers apply to Clark-Reliance SG800 Series gage valves.

Single Window

ModelVisibility (in / mm)Min. Centers (in / mm)
FG9046-5/8" (168)17" (432)
FG9057-3/4" (197)18" (457)
FG9069" (229)20" (508)
FG90710-1/8" (257)21" (533)
FG90811-3/4" (298)22" (559)
FG90912-1/2" (318)23" (584)

Double Window

ModelVisibility (in / mm)Min. Centers (in / mm)
FG96615" (381)26" (660)
FG97717-1/2" (444)29" (737)
FG98820" (508)31" (787)
FG99921-1/2" (546)33" (838)

Gages to 1500 PSI (103.4 Bar)

Borosilicate Glass

Three or more window models available upon request.

Single Window

ModelVisibility (in / mm)Min. Centers (in / mm)
FG15046-5/8" (168)20" (508)
FG15057-3/4" (197)21" (533)
FG15069" (229)23" (584)
FG150710-1/8" (257)24" (609)
FG150811-3/4" (298)25" (635)
FG150912-1/2" (318)26" (660)

Double Window

ModelVisibility (in / mm)Min. Centers (in / mm)
FG156615" (381)29" (737)
FG157717-1/2" (432)31" (787)
FG158819-1/2" (495)33" (838)
FG159921" (533)35" (889)

Gages to 2000 PSI (138 Bar)

Aluminosilicate Glass

All FG2000 Series gages supplied with flanged connections. Size 8 and 9 glass not available for this series.

Single Window

ModelVisibility (in / mm)Min. Centers (in / mm)
FG20046-5/8" (168)15" (381)
FG20057-3/4" (197)16" (406)
FG20069" (229)17" (432)
FG200710-1/8" (257)19" (483)

Double Window

ModelVisibility (in / mm)Min. Centers (in / mm)
FG205512" (305)20" (508)
FG206615" (381)23" (584)
FG207717" (432)25" (635)

Multiple Section Gages — Maximum Visibility

Dimensions in inches (mm) · 1" (25.4 mm) minimum overlap on all multiple section designs per ASME Section I · Size 8 and 9 not available for FG2000 Series · Gages with more than 3 sections supplied with flanged connections

# of SectionsSize 5Size 6Size 7Size 8Size 9
Three21.25 (540)25 (635)28.375 (721)33.25 (845)35.5 (902)
Four28 (711)33 (838)37.5 (953)44 (1118)47 (1194)
Five34.75 (883)41 (1041)46.625 (1184)54.75 (1391)58.5 (1486)
Six41.5 (1054)48 (1219)55.75 (1416)65.5 (1664)70 (1778)

Live Loading Option — FG1500 & FG2000 Series

For longer service life on applications with frequent pressure cycling. Longer studs with spring washers are provided on both sides of the gage; corner studs thread into the gage body to aid assembly. Spring washers required only on one side of middle studs.

To order: add "P" suffix to model number  ·  Example: FG1506 → FG1506P

Clark-Reliance DuraStar LED Illuminator — standard and daisy chain option

DuraStar™ Flat Glass Gage LED Illuminator

Attaches easily to new or existing Reliance flat glass gages — no tools required. Models for ordinary and classified (hazardous) locations. ATEX approved models available.

Ordinary Location Models

Power Supply: 100–277 VAC @ 50/60 Hz
Power Consumption: 320 mA @ 100 VAC
Estimated Life: 100,000 Hours
Approvals: FM / CFM Ordinary Locations
Wire Size: 12–18 AWG
Max Distance: 700 ft. (216 m)
Ambient Temp: -40°F to 160°F (-40°C to 70°C)
Electrical Conn: 3/4" FNPT

Hazardous Location Models

Power Supply: 115 or 230 VAC @ 50–60 Hz
Power Consumption: <250 mA @ 115 VAC / <125 mA @ 230 VAC
Estimated Life: 100,000 Hours
Wire Size: Min 18 AWG / Max 12 AWG
Max Distance: 72 ft. (22 m)

Approvals

→ Class I, Division 1, Groups B–D T4→ Class I, Zone 1, AEx db [ib] IIB+H2 T4 Gb→ ATEX Approved→ IECEx Approved

DuraStar™ Benefits

→Three columns of directed amber LEDs
→Brilliant star-like image at water level
→High contrast — superior visibility day or night
→No tools required for installation
→Field upgradable on existing gages
→Maintenance free — ~100,000 hr life
→No heat generation
→Continuous or on-demand operation
→Longest field-of-view
→Low electrical operating cost
→Ordinary and classified location models
→ATEX models available

DuraStar™ Model Numbers

Model NumberFits Gage GlassLength (in)Length (mm)Weight (lb)
DS1000-1411-1FG404 or FG90411.752987.50
DS1000-1511-1FG405 or FG90513.003307.75
DS1000-1611-1FG406 or FG90614.503688.00
DS1000-1711-1FG407 or FG90715.754008.25
DS1000-1811-1FG408 or FG90817.254388.50
DS1000-1911-1FG409 or FG90918.004578.75
DS1000-1411-2FG1504 or FG200413.003307.75
DS1000-1511-2FG1505 or FG200514.503688.00
DS1000-1611-2FG1506 or FG200615.754008.25
DS1000-1711-2FG1507 or FG200716.504198.50
DS1000-1811-2FG150818.004578.75
DS1000-1911-2FG150919.004839.00

DuraStar™ Ordering Code

DS1000 – [Gage Series][Window Size][Power Source][Power Supply] – [Area Classification]

Gage Series

1 = FG450–FG900

2 = FG1500–FG2000

Gage Window Size

4 through 9 (matches FG model suffix)

Power Source

1 = 115 VAC 50/60 Hz

2 = 230 VAC 50/60 Hz

Power Supply

1 = Single illuminator, one power supply (Ordinary)

2 = Double illuminator for two-section gages

H = Single illuminator, one power supply (Classified)

Area Classification (suffix)

DS1 = Non-Classified "Ordinary" Areas

DS5 = Classified Areas

DX5 = ATEX Approved Models

Request Pricing — Clark Reliance Flat Glass Gages

1+201-419-6111 · [email protected]

Three or more window models available upon request.

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