Ansul OEM O-Ring #214, Single Item - 428327

The Ansul 428327 is #214 Quad-Ring collar seal, purpose-built for precision field service on the Ansul Sentry stored-pressure extinguisher line. Where bulk packs are suited to large-scale facility overhauls, the 428327-P001 is the strategic choice for emergency go-bag repair and localized extinguisher recharge tasks. This multi-lobed elastomer serves as the primary pressure barrier for the entire Sentry stored-pressure line, including 5 lb, 10 lb, and 20 lb dry chemical models, as well as Cleanguard Halotron I maintenance applications.

Unlike standard round O-rings, the 428327 utilizes a unique four-lobed cross-section engineered for spiral failure elimination. Spiral failure is a common issue where a seal rolls during the high-torque installation of a heavy brass valve into a steel cylinder. The four distinct lobes provide a superior gas-tight interface, ensuring that even if one surface is slightly compromised by ABC powder, the secondary lobes maintain the seal. Utilizing this individual OEM component ensures your Sentry stored-pressure line returns to a UL Listed state without the overhead of opening industrial inventory.

The 428327 is the definitive Sentry valve-to-collar seal for technicians performing precision field service. Key use cases include:

• Emergency maintenance: When an extinguisher is found depressurized during a monthly inspection, the O-Ring 428327 allows for a full recharge and 6-year maintenance cycle without depleting bulk inventory earmarked for large-scale contracts.
• Go-bag repair kits: The single-unit format is ideal for technicians who carry a compact set of critical components for on-site response without overstocking field kits.
• Dry chemical extinguisher service: Compatible with ABC, BC, and PK dry chemical agents across the Sentry A05, AA05, A10, AA10, and AA20 model range.
• Halotron I maintenance: Fully compatible with Cleanguard Halotron I applications, expanding utility across clean-agent extinguisher servicing.
• Localized recharge tasks: Where only one or a small number of units require service, the format avoids unnecessary opening of bulk inventory.

Lubrication is required. Because the Quad-Ring has four lobes, there is more surface area for friction than a standard O-ring. Technicians must apply a light coating of Visilox V-711 or an equivalent Ansul-approved silicone lubricant before installation. This ensures the lobes slide into the collar groove without pinching, which prevents microscopic leak paths that would cause gradual depressurization.

Application is limited to the Sentry series only. The 428327 is not compatible with the Ansul Red Line series. Red Line units use cartridge-operated technology and have significantly different valve-to-collar interfaces. Installing this seal on a Red Line unit will result in immediate depressurization and a major code violation. Always verify the model series before beginning service.

OEM compliance: Using the original Ansul 428327 seal is the only way to ensure the Sentry extinguisher returns to its UL Listed state following a 6-year maintenance or recharge service. Substituting non-OEM seals may void certification and create liability exposure during inspections.

When is it better to buy the single P/N 428327-P001 instead of the 100-pack?

The single item is the definitive choice for emergency maintenance. If an extinguisher is found depressurized during a monthly inspection, the 428327-P001 allows for a full recharge and 6-year maintenance cycle without depleting bulk inventory earmarked for large-scale contracts.

Does this #214 seal require specific lubrication?

Yes. Because the Quad-Ring has four lobes, there is more surface area for friction than a standard O-ring. Technicians should apply a light coating of Visilox V-711 or an equivalent Ansul-approved silicone lubricant. This ensures the lobes slide into the collar groove without pinching, preventing microscopic leak paths.

Can I use this O-ring on an Ansul Red Line unit?

No. The Ansul Red Line series uses cartridge-operated technology and has significantly different valve-to-collar interfaces. The 428327-P001 is specifically listed for the Sentry series. Using this seal on a Red Line unit will lead to immediate depressurization and a major code violation.