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PENBERTHY

Penberthy is a brand with a long history in the design and manufacture of liquid level gauging equipment, particularly gauge cocks and gauge glass assemblies for industrial applications. The brand is widely recognized in the boiler, pressure vessel, and process industries for its robust, field-proven components that provide reliable visual indication of liquid levels in tanks, drums, and other vessels. Penberthy’s product line centers on gauge cocks—valves used to isolate and drain gauge glass assemblies—and gauge glass kits, which include the glass tubes, rods, and associated fittings needed for a complete level indication system. The gauge cocks are available in bronze and stainless steel body materials, with compatible gauge glass diameters of 5/8 inch and 3/4 inch, and are rated for media temperatures as low as -20°F. They feature handwheel handles made from steel or stainless steel, and drain connections are standard FNPT (female national pipe taper) for ease of piping. The gauge glass kits use borosilicate glass tubes, known for thermal shock resistance and clarity, with bronze rods for structural support. Penberthy components are built to meet common industrial standards for pressure and temperature, making them suitable for steam boilers, hot water systems, and chemical processing where visual level monitoring is critical. 3G Electric stocks a range of Penberthy gauge cocks and gauge glass kits, including models such as the N7BB, N7AB, N7AS, N7BSS, N7ASS, and N7BS, as well as glass rod kits like the LG-17 and 1LG-18. This inventory supports maintenance and replacement needs for plant engineers and procurement specialists who require consistent, interchangeable parts for existing Penberthy installations or for new builds. 3G Electric provides global logistics support, enabling procurement teams to source these components with clear specifications and part numbers, reducing the risk of mismatched parts during installation.

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About PENBERTHY

Penberthy is a brand with a long history in the design and manufacture of liquid level gauging equipment, particularly gauge cocks and gauge glass assemblies for industrial applications. The brand is widely recognized in the boiler, pressure vessel, and process industries for its robust, field-proven components that provide reliable visual indication of liquid levels in tanks, drums, and other vessels. Penberthy’s product line centers on gauge cocks—valves used to isolate and drain gauge glass assemblies—and gauge glass kits, which include the glass tubes, rods, and associated fittings needed for a complete level indication system. The gauge cocks are available in bronze and stainless steel body materials, with compatible gauge glass diameters of 5/8 inch and 3/4 inch, and are rated for media temperatures as low as -20°F. They feature handwheel handles made from steel or stainless steel, and drain connections are standard FNPT (female national pipe taper) for ease of piping. The gauge glass kits use borosilicate glass tubes, known for thermal shock resistance and clarity, with bronze rods for structural support. Penberthy components are built to meet common industrial standards for pressure and temperature, making them suitable for steam boilers, hot water systems, and chemical processing where visual level monitoring is critical. 3G Electric stocks a range of Penberthy gauge cocks and gauge glass kits, including models such as the N7BB, N7AB, N7AS, N7BSS, N7ASS, and N7BS, as well as glass rod kits like the LG-17 and 1LG-18. This inventory supports maintenance and replacement needs for plant engineers and procurement specialists who require consistent, interchangeable parts for existing Penberthy installations or for new builds. 3G Electric provides global logistics support, enabling procurement teams to source these components with clear specifications and part numbers, reducing the risk of mismatched parts during installation.

Common Applications

  • Steam boiler water level indication — Penberthy gauge cocks (e.g., N7BB) and glass rod kits (e.g., LG-17) for visual level monitoring on boiler drums.
  • Chemical processing vessel level monitoring — Stainless steel gauge cocks (e.g., N7AS) for corrosive fluid applications requiring corrosion resistance.
  • Hot water storage tank level indication — Bronze gauge cocks (e.g., N7AB) for general service in hot water systems up to -20°F minimum.
  • Cryogenic fluid level measurement — Stainless steel gauge cocks (e.g., N7BSS) for low-temperature media in industrial gas storage.
  • Pressure vessel level gauge replacement — Penberthy glass rod kits (e.g., 1LG-18) for retrofitting existing gauge assemblies on pressure vessels.
  • Industrial furnace fuel tank level monitoring — Gauge cocks (e.g., N7BS) for liquid level indication on fuel oil or water tanks in burner systems.

Frequently asked questions

Common questions about PENBERTHY from 3G Electric.

What materials are available for Penberthy gauge cocks?

Penberthy gauge cocks are offered in bronze and stainless steel body materials. Bronze models (e.g., N7BB, N7AB) are suitable for general service in water and steam applications, while stainless steel models (e.g., N7AS, N7BSS, N7ASS, N7BS) provide enhanced corrosion resistance for more aggressive media or higher-temperature environments. Handle materials vary: steel handles are standard on most models, but stainless steel handles are available on certain variants like the N7BSS and N7ASS.

What is the compatible gauge glass diameter for Penberthy gauge cocks?

Penberthy gauge cocks are designed to accommodate gauge glass diameters of either 5/8 inch or 3/4 inch. For example, models N7AB and N7AS are compatible with 5/8 inch glass, while models N7BB and N7BS are compatible with 3/4 inch glass. It is important to match the gauge cock to the glass diameter to ensure a proper seal and reliable operation.

What is the minimum media temperature rating for Penberthy gauge cocks?

Penberthy gauge cocks are rated for a minimum media temperature of -20°F (-29°C). This low-temperature capability makes them suitable for applications involving chilled water, cryogenic fluids, or outdoor installations in cold climates. The rating applies across the bronze and stainless steel models listed.

What type of drain connection do Penberthy gauge cocks use?

Penberthy gauge cocks feature a drain connection type of FNPT (female national pipe taper). This standard threaded connection allows for easy attachment of drain piping or fittings. The FNPT connection is consistent across all models, including bronze and stainless steel variants, simplifying replacement and installation.

What is included in a Penberthy gauge glass kit?

Penberthy gauge glass kits, such as the LG-17 and 1LG-18, include a borosilicate glass tube and a bronze rod. The borosilicate glass provides thermal shock resistance and clear visibility of the liquid level. The bronze rod supports the glass assembly. The kit is designed for use with Penberthy gauge cocks and other compatible fittings to create a complete liquid level indication system.

Are Penberthy gauge cocks available with different handle types?

Yes, Penberthy gauge cocks are available with handwheel handles. The handle material can be steel or stainless steel, depending on the model. For instance, the N7BB and N7AB have steel handles, while the N7BSS and N7ASS have stainless steel handles. The handwheel design allows for manual operation to open or close the valve for draining or isolating the gauge glass.