ClearPort

Forney ClearPort observation ports are designed for installation on HRSG ducts and other hot furnaces. Forney ClearPorts provide a clear, unobstructed view of the duct burner flames as well as pressure parts downstream. Forney ClearPorts includes a butterfly-style isolation plate to restrict heat conduction towards the glass. The glass pane is suitable for high temperatures to prevent any discoloration over service life. Butterfly-style isolation plate is easy to operate with a spring-loaded side handle. When released, the spring ensures the isolation plate returns to the closed position. A cooling air inlet port is provided for the user to connect cooling air at a specified pressure and flow rate. These view ports are available in 4”, 6”, and 8” sizes and are designed to be installed on a standard #150 ASME flange.

Part Number: Single Glass

4” Diameter ClearPort P/N: VP-04.1

6” Diameter ClearPort P/N: VP-06.1

8” Diameter ClearPort P/N: VP-08.1

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Part Number: Double Glass

4” Diameter ClearPort P/N: VP-04.2

6” Diameter ClearPort P/N: VP-06.2

8” Diameter ClearPort P/N: VP-08.2

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Glass Pane:

Quartz Glass; Fused Silica for High Temperature

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Body:

4”, 6”, 8” Schedule 40, 304 Stainless Steel

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Isolation Plate:

.25” thick, 304 Stainless Steel

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Rear Flange:

Pressure Class: 150, Raised Face, Sch 40, 304 Stainless steel

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Gaskets:

High-Temperature Ceramic Fiber

Temperature Range: -50 to 2,300 Degrees F.

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Cooling Air:

Flow: 6 scfm at 3” w.c. above duct pressure

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Weight:

4” = 68 lbs., 6” = 91 lbs., 8” = 99 lbs. (45 Kg)

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Welding:

All Welds AWS D1.6 or ASME B31.3

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Design Temperature:

1,324 Degrees F.

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Design Pressure:

69 MBAR (1.25 PSI)

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Mounting Flange (by User):

ASME 4”, 6”, or 8” w/ bolt hole pattern straddling centerline

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Mounting Adaptor

For installing 6” Clear Port on 4” Flange: P/N: VP-FLNG-04

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Mounting Adaptor

For installing 6” Clear Port on TJ Model 15 Rectangular Flange

P/N: VP-FLNG -15

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Mounting Adaptor

For installing 6” Clear Port on TJ Model 15 wall studs, flush mount

P/N: VP-FLNG-15F

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Note: Adapters are available to fit other sizes. Contact sales for more info.

CLEAR PORT User Manual

Publication 372000-89 Rev. A

Fused Silica Quartz Glass
‍The Quartz Glass can handle temperatures up to 1,800°F and pressures up to 100 psi.

304 Stainless Steel Construction
‍The Forney ClearPort observation port remains clean and free of rust and corrosion, giving unsurpassed reliability.

Ease of Operation
‍The rotating handle gives the user effortless operation and, with a spring return, ensures the isolation plate is closed when not being viewed. A must for safety in case of upset conditions occur.

Class 150# ANSI Flange Mounting
‍Used in low to medium-pressure pipe applications, this type of connection is commonly used in mounting round observation ports.

Maintenance Free
‍The Butterfly design and the stainless-steel construction make the Forney ClearPort very reliable for many years.

Cooling Air Port
‍The 1/2" NPT Cooling Air Port makes for a typical air connection.

Ceramic Insulation
‍Forney ClearPort's ceramic insulation provides thermal breaks.

Dual Pane Option
‍Reduces the front surface temperatures to around 140 °F

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1-800-356-7740