055604 Mechanical Gas Valve 1 1/4in

The Ansul 055604 is a high-flow, 1 1/4-inch mechanical gas valve designed for large-scale commercial kitchens where standard 3/4" or 1" valves would restrict fuel volume. While smaller valves are suited for individual fryers or small ranges, the 1 1/4" model is the industrial workhorse typically used to protect main supply lines or high-BTU appliance clusters.

Part of the Ansul R-102 and Piranha ecosystem, this valve provides a mechanical fail-safe: it does not require electricity to close. Instead, it utilizes a precision-engineered internal spring that snaps the valve shut the moment your fire system detects a hazard. By choosing the 1 1/4" size, you ensure your kitchen maintains the gas pressure required for heavy-duty cooking while meeting the strict safety requirements of UL 300.

Key Technical Differentiator: Flow Capacity

For technical accuracy, it's important to note why a technician chooses this specific model over others:

• Pipe Diameter: This valve is threaded for 1 1/4" NPT, making it capable of supporting larger appliance manifolds without "starving" the burners of fuel.
• Maximum Pressure: Rated for 10 psi (0.69 bar). In many commercial setups, this allows the valve to be placed before the pressure regulator if necessary, according to specific Ansul design layouts.
• Mechanical Reliability: Because it is cable-actuated, it is immune to power outages—a critical advantage over solenoid valves during a building fire.

The Ansul 055604 is specifically recommended for high-volume environments where standard valves cannot handle the required gas flow:

• Main Cooking Lines: Where a single valve must shut off a row of 4+ heavy-duty appliances.
• Institutional Feeding: University dining halls, hospital kitchens, and large hotel banquet facilities.
• High-BTU Appliances: Large charbroilers and heavy-duty wok ranges that have a high "Gas Load" (BTU/hr).

Maintenance Checklist

To maintain your kitchen's UL listing, the 055604 must be serviced every 6 months:

1. Spring Tension Test: Technicians must verify the spring hasn't fatigued.
2. De-Greasing: Ensure the external cable-attachment arm is free of carbon and grease buildup.
3. Manual Reset: Confirm the manual pull-ring resets the valve to "Open" with a distinct, locked engagement.

The Ansul 055604 meets critical regulatory standards required for commercial kitchen fire protection systems:

• UL & ULC Listing: Essential for passing Fire Marshal inspections in the US and Canada.
• NFPA 17A & NFPA 96: Complies with the mandatory standards for "Wet Chemical Extinguishing Systems" and "Ventilation Control and Fire Protection of Commercial Cooking Operations."
• Sealing Standard: Features "Bubble-Tight" shut-off to ensure zero gas leakage once the system is triggered.