FM Approved open-type, non-automatic spray nozzle designed for directional spray application in fixed fire protection systems. Fitted with an external deflector, the nozzle discharges water in a directional cone-shaped pattern of fine droplets, providing uniform cooling coverage over exposed vertical, horizontal, curved, and irregular surfaces. Ideal for deluge water spray systems protecting special hazards, the MV nozzle helps prevent excessive heat absorption and reduces the risk of structural damage or fire spread.

Available in brass (MV-A/MV-AS), stainless steel (MV-B/MV-BS), or aluminium bronze (MV-E) construction, with a wide range of K-factor and spray angle combinations to suit varying system designs. MV-AS and MV-BS models include an integrated strainer, while optional blow-off plugs are available to protect against foreign material ingress in the waterway.

Key Specs:

• Models: MV-A & MV-AS (Brass) | MV-B & MV-BS (Stainless Steel) | MV-E (Aluminium Bronze)
• Type: MV-A, MV-B & MV-E – without strainer | MV-AS & MV-BS – with strainer
• Maximum Working Pressure: 12 Bar (175 PSI)
• Effective Working Pressure: 1.4 to 3.5 Kg/sq.cm (20–50 PSI)
• End Connection: ½” BSPT (½” NPT optional)
• Spray Angles: 140°, 120°, 110°, 100°, 90°, 80° & 65°
• K-Factor Range: K-18 to K-102 (metric), K-18 to K-91 (US)
• Weight (Approx.): 0.110 kg
• Approvals: FM Approved, UL Listed

Materials (Table 1):

Finish: MV-A & MV-AS – Natural brass, chrome-plated nickel, electroless nickel plated, or epoxy powder coated | MV-B, MV-BS & MV-E – Natural finish

Nozzles must be hand-tightened into fittings and finished with a nozzle wrench (Model NW-M) — excessive torque may damage the nozzle arms or deflector. A main pipeline strainer per NFPA-15 is required for nozzles with K-factor 51 or below, or where system water is likely to contain obstructive materials. It is recommended that the system be inspected regularly and flow-tested at least twice a year, or as required by NFPA/TAC or the authority having jurisdiction.