Approvals for Air and Dust Seal
UL and C-UL Listed for use with the RFII Standard Response
Concealed Sprinkler (TY3551).
Maximum Working Pressure
Maximum 250 psi (17,3 bar) by UL, C-UL, and NYC
Maximum 175 psi (12,1 bar) by FM, VdS, and LPCB
Temperature Rating
155°F/68°C Sprinkler with 139°F/59°C Plate
200°F/93°C Sprinkler with 165°F/74°C Plate
Discharge Coefficient
K= 5.6 GPM/psi1/2 (80,6 LPM/bar1/2)
Adjustment
1/2 inch (12,7 mm)
Physical Characteristics Frame . . . . . . . . . . . . . . .
. . . . Bronze
Support Cup . . . Chrome Plated Steel
Guide Pins . . . . . . . . . . Stainless Steel
Deflector . . . . . . . . . . . . . . . . . Bronze
Compression Screw . . . . . . . . . Brass
Bulb . . . . . . . . . . . . . . . . . . . . . . Glass
Cap . . . . . . . . . . . . Bronze or Copper
Sealing Assembly . . . . . . . . Beryllium Nickel w/ Teflon†
Cover Plate . . . . . . . . . . . . . . . . Brass
Retainer . . . . . . . . . . . . . . . . . . . Brass
Ejection Spring . . . . . . Stainless Steel


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