Senju Comtek Corp. showcased two commercial flush-mount pendent sprinklers: the ZN-QR K5.6 (shown) and ZN-UF K5.6. Low-profile and decorative, both these sprinklers feature a solder heat element, metal seat and 1/2-inch thread size. The temperature rating of the QR is 162°F and 205°F; for the UF it’s 162°F, 205°F and 282°F. They have a maximum working pressure of 175 psi and vertical adjustment is 3/8-inch.
Senju Comtek Corp.