Victaulic FireLock FL-SR/ST K11.2 Upright Storage Sprinkler – V3403

The Victaulic FireLock Series FL-SR/ST V3403 is a standard-response upright storage sprinkler designed for warehouse and storage fire-protection applications.

The sprinkler uses a CMDA, or Control Mode Density Area, design intended to control fire through the required design density over a calculated operating area.

Its nominal K11.2 discharge coefficient provides relatively high water flow at an appropriate design pressure, making it suitable for selected rack, palletized and solid-pile storage applications, depending on the commodity, storage arrangement, ceiling height and approved system design.

This product page covers model V3403 Upright only. Model V3407 Pendent is entered as a separate product because it has a different orientation and product appearance.

Key Features:

• Upright storage fire sprinkler.
• Victaulic FireLock Series FL-SR/ST.
• Model V3403.
• CMDA storage sprinkler.
• Standard Response.
• Nominal K-factor of 11.2.
• Metric nominal K-factor of 16.1.
• Maximum working pressure of 175 PSI.
• 100% factory hydrostatically tested at 500 PSI.
• Minimum UL/FM operating pressure of 7 PSI.
• Available with a 3/4-inch NPT connection.
• Available with a 20 mm BSPT connection.
• Available with an IGS grooved connection.
• Multiple temperature ratings.
• Multiple frame finishes.
• Compatible V34/V36 sprinkler guard.
• Multiple installation-wrench options.
• cULus Listed as shown in the catalogue.
• FM Approved as shown in the catalogue.
• Intended for systems designed in accordance with NFPA, FM Data Sheets or applicable local standards.

Operation:

The sprinkler uses a 3 mm nominal-diameter heat-sensitive glass bulb.

When ambient temperature reaches the sprinkler’s rated temperature:

• The fluid inside the glass bulb expands.
• The bulb breaks.
• The sealing assembly releases.
• Water discharges through the sprinkler orifice.
• The upright deflector distributes water upward and outward before directing it into the protected area.
• Fire control is provided according to the system’s calculated density and operating area.

Discharge Coefficient:

• K-factor: 11.2 GPM/psi½.
• Nominal metric K-factor: 16.1.

Maximum Working Pressure:

• 175 PSI.
• 1200 kPa.
• Approximately 12 bar.

Factory Hydrostatic Test:

• 100% factory tested.
• Test pressure: 500 PSI.
• 3447 kPa.
• 34 bar.

Minimum Operating Pressure Shown:

• 7 PSI.
• 48 kPa.
• Approximately 0.5 bar.

Available Connections:

• 3/4-inch NPT.
• 20 mm BSPT.
• IGS grooved connection.

The IGS option allows installation using the compatible Victaulic Installation-Ready Grooved Sprinkler Connection arrangement.

Approved Temperature Ratings Shown:

• 135°F / 57°C.
• 155°F / 68°C.
• 175°F / 79°C.
• 200°F / 93°C.
• 286°F / 141°C.

These temperature ratings are shown in the cULus and FM tables for the applicable V3403 configuration.

Main Construction Materials:

• Deflector: Bronze.
• Bulb: Glass, 3 mm nominal diameter.
• Load screw: Bronze.
• Pip cap: Bronze.
• Spring seal: PTFE-coated beryllium nickel alloy.
• Frame: Brass.
• Lodgement spring: Stainless steel.
• Installation wrench: Ductile iron.

Available Sprinkler Finishes:

• Plain brass.
• Chrome plated.
• White polyester painted.
• Flat black polyester painted.
• Custom polyester painted.
• VC-250.

Selected polyester finishes are UL Listed for corrosion resistance. The VC-250 finish is shown as UL Listed and FM Approved for corrosion resistance.

Available Sprinkler Guard:

• V34/V36 Guard.

The listed guard can help protect the sprinkler against accidental mechanical damage where required.

Available Installation Wrenches:

• V34 Recessed Wrench.
• V34 Open-End Wrench.
• 3/16-inch Hex-Bit V9.

Use the applicable listed installation tool for the selected connection arrangement. Do not apply installation force to the glass bulb or deflector.

Main Dimensions:

Threaded V3403:

• Overall height: approximately 2.5 inches.
• Metric height: 63 mm.
• Frame and deflector height: approximately 1.75 inches.
• Metric height: 44 mm.
• Deflector width: approximately 1.875 inches.
• Metric width: 47 mm.
• Nominal make-in: 1/2 inch.
• Metric make-in: 13 mm.

Grooved V3403:

• Overall height with coupling: approximately 2.5 inches.
• Metric height: 63 mm.
• Deflector width: approximately 1.875 inches.
• Metric width: 47 mm.

Storage Applications:

Subject to approved design criteria, the sprinkler may be applied to:

• Open-frame rack storage.
• Single-row racks.
• Double-row racks.
• Multiple-row racks.
• Portable rack storage.
• Class I through Class IV commodities.
• Selected Group A and Group B plastic storage.
• Solid-pile storage.
• Palletized storage.
• Idle pallet storage.
• Rubber-tire storage.
• Rolled-paper storage.
• Flammable-liquid storage where permitted by design.
• Aerosol storage under the applicable standard.
• Selected automotive-component storage in portable racks.

Referenced Design Standards:

• NFPA 13.
• NFPA 30.
• NFPA 30B.
• FM Data Sheet 2-0.
• FM Data Sheet 8-24.
• FM Data Sheet 8-3.
• FM Data Sheet 8-21.
• FM Data Sheet 7-29.
• FM Data Sheet 7-31.

Final sprinkler selection must consider:

• Commodity type.
• Commodity classification.
• Storage height.
• Ceiling height.
• Rack arrangement.
• Solid or open shelves.
• Sprinkler spacing.
• Design density.
• Design area.
• Available water pressure and flow.
• NFPA or FM requirements.
• Project and authority requirements.

Important Instructions:

• Design and install the sprinkler according to NFPA, FM Data Sheets or applicable local standards.
• Fully depressurize and drain the piping before installation, removal or maintenance.
• Use appropriate personal protective equipment.
• Do not install a damaged sprinkler or one with a cracked bulb.
• Do not field paint or modify the sprinkler.
• Use only the compatible connection and installation wrench.
• Refer to the latest Victaulic documentation before final approval.
• The system designer is responsible for confirming suitability for the intended commodity and environment.

Important Note:

Not every connection, finish and temperature configuration necessarily carries the same approvals in every market.

Verify the model, connection, temperature rating, finish and current approval status before procurement and obtain consultant and authority approval for the final system design.