The valve is in the closed position (clapper inside the valve is horizontal) and air pressure keeps the clapper closed. Without the testing, the sprinkler system cannot receive credit. These units are located between two tightly closed resilient seated shutoff valves, as an assembly, and are equipped NFPA 25- Control Valves Section 9-3 0 $@} vHX 5)f $vI^ j@Q$A n V$DY!3y` ZNc How Dry Pipe Valves Function 1. drain shall run to a common drainage point and discharge directly to exterior. h[o?A(Gx8k.2EBHGieTN(+1RB"SJDd.$Iex3"MfvB&M*,ICT ~A=z~i 3);eGQW{{ttwEfSu%G9L9J:Hz:9i:-k?o0s19^Ohkh08(Z?C~Y4EWLNO*T;G*ok55r:=WEJu|,&&KPq|oo}&WWbE5*!$WsE)o:NP)KS$}:09PFHtBt&iL}/-"iJ3tEtCHKTQMKj[JD*S)Y\qVzVV!vAVZ b41R5J`T` H|V\Ek)]-'sDP~~zfrr|v_j3/R[3 L$k0}sT8SX?uB4c!)=]6HYG1D`YRsQR}rbIos|qh*ns:\y(CcFd6$3^;0+{e_U2o%+^dPl0vz7 LekWp/qK7gr:7A4]PR`t5eyeyeV6tq4YKC[~@S)Ml9t&kV@,4U. They are assembled on fire pipeline to separates the fire area into small distribution zone for indication and control. When an automatic sprinkler system is undergoing repairs or renovations, for example, it is often necessary to close valves that control the water supply. Located outside a building, the post indicator valve extends up from the ground over a water supply main. In the event of a fire, no water would reach the individual sprinklers. 3 x 3 (or large enough to allow for service of sprinkler riser) fire rated access panel and (3) if recessed, access panel identified by a metal sign stating sprinkler control valve 1. st. floor etc. As the operator rotates the handle counterclockwise, the stem extends further and further out of the handle, indicating the relative degree of the gate opening. Listings certify that a check valve is designed to withstand the conditions it'll be exposed to while in use. You can seal a valve by passing a wire and lead seal (or a similar device) through the hand wheel and a stationary object on the valve. At its basic core, a valve is going to help control water throughout a web standpipe system. (3) Within a sprinkler pump room. The main drain also tests the operation of the water supply for the sprinkler system. It's extremely important that all valves and drains have proper identification. sprinklers. These valves come in a variety of sizes and types. Valves or switches which are located within the building elements must also In occupancies required to be 5.15.1 Control Valve Supervisory Signal-Initiating Device 205 provide floor control valve assembly for upper level sprinkler zone 206 assembly shall include: control valve (with tamper switch), check valve, water flow switch, test/drain. 10. The Requirement For antifreeze sprinkler systems, every system riser must have a placard mounted on it to indicate the number and location of any remote antifreeze systems supplied by that riser. 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