Protective plate

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■Protective plate(former name: heat collecting plate) 　 Protective plate to protect a closed sprinkler head from spray interference (heat detection interference)* from duct or piping with an open type decorative ceiling Part number A17488 Protective plate (formerly A10768) 　 ●Thickness: 0.8 t ●Outer Diameter: 400 mm ●Inner Diameter: 22 mm ●Accessory: Steel washe 　　　　　　　Rubber washer ●Coating color: Ivory ※For details of dimensions, please check the approval request diagram (PDF) below. ■Approval request diagram(PDF format) A17488＿Protective plate.pdf Adobe Reader of Adobe Systems Incorporated is necessary to see the approval request drawing (PDF format). Part number A17489 Square protective plate (formerly A10770) 　 ●Made to order. ●Specify the side dimensions and depth, and the hole positions, 　diameters, and quantity. ●Coating color: Ivory 　 Part number A17490 Protective plate assembly (formerly A10771) 　 ● 2-part assembly version of A17488 protective plate (round) ●Can be installed in locations where the head is already mounted. ●Install pipes with combination bands from the top. ※For details of dimensions, please check the approval request diagram (PDF) below. ■Approval request diagram(PDF format) A17490＿Protective plate assembly.pdf Adobe Reader of Adobe Systems Incorporated is necessary to see the approval request drawing (PDF format).     　 * Spray interference (heat detection interference) 　occurs 　when a head installed above the ceiling detects heat and 　operates to spray water onto the head located under the 　duct and piping, thereby reducing the capacity of the lower 　head to detect heat.

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