Boiler Observation Ports

Our Hi-Temp Low Pressure Peep Sights have standard NPT male pipe threads. The housing of the units is available in stainless steel or carbon steel with nickel plating. Each unit is carefully assembled with a quartz lens and grafoil gaskets.

The quartz lens is suited for a maximum intermittent operating temperature of 2048°F and continuous operating temperature of 1600°F, and allows for optical pyrometer checking of the flame or operation of vessel.
The lens can easily be removed for cleaning or replacement.

Standard stocked units range in size from 1/2" to 2". Custom sizes 2-1/2", 3", 4", 6" by special order.
Operating environment and temperature should be considered when ordering.

These Low-Temp High Pressure Peep Sites have standard NPT male pipe threads. The borosilicate lens is suited for a maximum operating temperature of 400°F. The borosilicate lens allows for visual or optical pyrometer checking of the flame or operation of vessel. The lens can easily be removed for cleaning, replacement or re-packing. Standard stocked units range in size from 1/4" to 2".

Available in Brass, Stainless Steel and Carbon Steel.

Our Round Observation Port provides a safe and clear method to view the interior of a vessel. The port mounts easily to the vessel wall to protect from dust and sparks. We carry four, six and eight inch sizes available from stock with a carbon or stainless steel housing. Other sizes are available as special orders.

Round observation port can be fitted with two glass options - Pyrex or Quartz. The operating environment and heat should be considered when ordering type of steel and glass.

Our Blast Gate Port F/T, available in 3" or 4" pipe size, mounts to a mating flange, while the viewing components are housed in a NPT threaded body half. The standard stainless steel slide arrangement in the blast gate gives added protection and life to the lens during operation, and allows maintenance to be performed with added safety during vessel down-time.

This special half-flanged, half-threaded unit is only available in 3" and 4" sizes.

The standard unit is a Class 30 gray iron with maximum temperature of
425 °F. Custom units made from Carbon Steel and Stainless Steel by special order.

Glass types available for this unit are Clear Quartz, Clear Pyrex.

Our Blast Gate Observation Ports uses our standard line of blast gates as the primary component and incorporate a glass lens, gaskets, and rings that are securely retained with a metal bushing. The stainless steel slide arrangement in the blast gate gives added protection and life to the lens during operation, and allows maintenance to be performed with added safety during vessel down-time.

Additional cooling can be obtained by adding a purge connection on the glass or vessel side of the blast gate housing.
Threaded sizes range from 2" to 6" NPT threaded openings. Three choices of glass are available for varying temperature exposures and viewing requirements.

The standard unit is a Class 30 gray iron with maximum temperature of 425 °F. Custom units made from Carbon Steel and Stainless Steel by special order.

Glass types available for this unit are Clear Quartz, Clear Pyrex.

Our Flanged Blast Gate Observation Ports uses our standard line of blast gates as the primary components and incorporate a mating flange, gaskets, and the glass lens which is secured by a metal retaining ring.

The stainless steel slide arrangement in the blast gate gives added protection and life to the lens during operations, and allows maintenance to be performed with added safety during vessel down-time.

American Standard 125 flange pattern observation ports are available in 4" to 12 " sizes.

The standard unit is a Class 30 gray iron with maximum temperature of 425 °F. Custom units made from Carbon Steel and Stainless Steel by special order.

Glass types available for this unit are Clear Quartz, Clear Pyrex.

Our Saf-T-Eye® Observation Ports enable the operator to safely and clearly inspect the interior. Adjustments can be made under actual operating conditions without combustion or air infiltration. Four types of glass are available for a variety of viewing conditions. High and Low temperature glass, as explained below, is protected by the stainless steel screen and stainless shutter. The viewing is done by pulling handle down; when finished release handle and shutter closes automatically. Glass can be cleaned and removed quickly by using wing nuts.

Each unit includes a 1/4" NPT purge hole for adding cooling capabilities with air or nitrogen. Sealant can be added to improve the seal in low-pressure applications. All Saf-T-Eye® observation ports are provided with a mounting flange gasket that fits securely between the unit and the vessel wall. All configurations of the Saf-T-Eye® units are available in cast iron and stainless steel (except for the Model 12 (Angular) and 16, which is carbon steel) from stock. Fabrication in other metals for specific applications is available upon request.

Glass types available for this unit are Clear Quartz, Clear Pyrex.