Adjustable Sprinkler Head Assembly

NFES 0998 Adjustable Sprinkler Head Assembly Specifications Adjustable Sprinkler Head Assembly must contain the following 3 pieces: Full or part-circle (adjustable) solid brass or bronze impact sprinkler head: Stainless steel (or other corrosion resistant metal) springs, spindle, and fulcrum pin 1/2” – 14 Male National Pipe Thread (MNPT) inlet. Removeable straight bore nozzle with an orifice of 5/32” or 4mm - 24 UNF threaded. No polymer or other non-metal parts, except for bearing washers or bushings on the bearing nipple and other non-critical bearings, bushings, washers, and spacers. The Male NPT inlet shall have sufficient engagement length to achieve a leak-free seal and rely only on standard assembly practices, such as sealing compound or tape, to create a leak-free seal between the sprinkler head and the 45 Degree Elbow Body (i.e., no O-rings, gaskets, etc.) The upper section of the bearing sleeve of the sprinkler head (above the NPT threads) shall be sufficiently long to prevent interference between the trip lever and the 45 Degree Angle Elbow Body. The bearing nipple shall not bottom out when male NPT inlet is fully threaded and torqued into 45 Degree Angle Elbow Body. The sprinkler head should swivel freely, and the trip lever assembly should function fully, free from any interference with any other components of assembly. Operating oranges of the adjustable sprinkler head: Operating Pressure: 30 to 50 PSI (+/– 5 PSI) Nominal volumetric flow rate: 3.0 to 5.5 GPM (+/– 0.5 GPM) Rotation: 20 to 340 degrees (+/– 10 deg) part-circle operation, and full circle operation with trip lever flipped up (disengaged) Spray radius: 30 to 45 ft (+/– 5 ft) Spray trajectory: 25 degrees (+/– 3 deg) 45 Degree Angle Elbow Body: Material shall conform to the following: Cast aluminum alloy, 356-T6, in accordance with ASTM B 26. Construction of the Elbow Body shall consist of the following: Maximum overall length of 4.0 inches 45-degree bend at inlet Maximum length of bend at inlet of 2.0 inches Inlet ½” NPT threaded male. Outlet ½” NPT Threaded female. The back side of the fitting (opposite of the 45-degree inlet) must fit securely fastened inside of a 1” x 1”, 90-degree steel stake and the V-clip and bar system (pictured below for reference) to prevent slippage during use. The Elbow Body must be self-supporting atop of the steel stake. Workmanship. Workmanship shall be equal to the best commercial practices consistent with the highest engineering standards in the industry and shall be free from any nonconformance which may impair serviceability or detract from the product’s appearance. Cast Components. Cast parts shall be fine-grained, free from blowholes, pinholes, pits, porosity, hard spots, shrinkage, cracks, or other nonconformities. Symmetry. All metal part sections shall be symmetrical and concentric to 0.030 inch. Proof Pressure. The Body Elbow shall withstand a hydrostatic proof pressure of 600 psi g, with no leaks, permanent deformation, mechanical damage, or structural failure. Brass swivel, reducing, 3/4" Female Hose Thread (FHT) X 1/2" Female Pipe Thread Fitting (FNPT) with 3/4” garden hose rubber gasket. PACKAGING & MARKING: Shall be packaged 20ea in a 10"x8"x6" single-wall regular-slotted corrugated fiberboard carton with a bursting strength of 200 psi and standard Edge Crush Test (ECT) of 32 lbs. The carton shall have four flaps on top and on bottom with the outer flaps meeting when closed. The bottom of carton shall be marked with carton ratings and limitations (see pictures below). The sprinkler head assemblies must be packaged in 4 rows containing 5 EA. Alternate the direction of the rows for a total of 4 rows high in the box.