16347-3 - Smith 3-Stage Nitrogen Blanketing Regulator with Low Pressure Switch

Smith 16347-3: The Standard for Transformer Maintenance

When it comes to maintaining oil-filled sub-station power transformers, the Smith 16347-3 Nitrogen Blanketing Regulator stands out as a robust and reliable solution. This heavy-duty regulator is designed to solve the specific challenges of nitrogen blanketing, where maintaining a very low, specific pressure is essential to keep moisture and oxygen out of the transformer oil. The unit features a sophisticated 3-stage design that steps down high-pressure nitrogen from the cylinder to an ultra-low, steady 0.5 PSIG. This level of precision is difficult to achieve with standard welding regulators, making the 16347-3 an essential tool for utility workers and high-voltage electricians.

One of the standout features of this model is the inclusion of a pressure switch, which is wired to allow for remote monitoring. This is a game-changer for remote substations; if the nitrogen cylinder is running low (adjustable range of 70-300 PSIG), the switch can activate an alarm or notification system, ensuring you never lose the protective gas blanket due to an empty tank. Additionally, the regulator is built with a rapid-fill bypass valve. When you need to fill a transformer after service, you don't have to wait for the slow 0.5 PSI flow; simply engage the bypass to deliver 6 PSIG for fast, efficient filling.

Durability is key for equipment installed in the field. The Smith 16347-3 is constructed with a combination of brass, aluminum, and plated zinc to resist corrosion and weather damage. It connects easily to standard nitrogen cylinders via a CGA 580 fitting and handles inlet pressures up to 3000 PSIG. Safety is also built-in, with an 8 PSIG relief valve that protects the transformer seal and tank from pressure spikes caused by solar heating or other temperature variations. Whether you are outfitting a new substation or replacing aging equipment, this Smith regulator provides the accuracy and reliability required for critical infrastructure protection.