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D. VALVES <br />1. Cylinders <br />a) Chlorine cylinders are to have a single chlorine Teflon style valve produced by <br />Sherwood or Tekno which is equipped ivith a firsible metal plug -type relief' <br />device. This is a must comply safety requirement, <br />2. Ton Container Valves <br />a) Chlorine Ion containers are to have two identical Teflon style valves produced by <br />Sherwood or Tekno near the center of'one head. This is a must comply safely <br />requirement. When vertically aligned, the valve in the upper position is ztsed for <br />gas ivilhdraival, and the Irnwer one for liquid irillub-aii'(7l. The standard ton <br />container valve is identical to the cylinder valve except that it has no,fusible <br />metal type relief'device, and the valve seal diameter may be larger than on most <br />cylinder valves. There are low sizes of ton container valves: 314 inch NGT and 1 <br />inch NGT, <br />3. Valve Outlet Tlueads <br />a) Outlet threads on cylinder and ton containers are special straight threads <br />(1, 030" - 14NGO-RH-LXT) ivhich cor�for117 to connection number CGA 820 and <br />B20C i,which ittilize a yoke -type connection, These threads are to acconunodale <br />the outlet cap only and are not to be used for chlorine hose conneclirnrs. <br />E, PRESSURE RELIEF DEVICES <br />1. Cylinders <br />a) The relief'device on chlorine cylinders is a firsible metal plug in the cylinder <br />valve located below the valve seat, The fusible metal is cast into an 'Alloy "B" or <br />Alloy "A" holder ivhich is screwed into a tapped hole in the valve body, The <br />firsible plugs are designed to melt between 158 degrees F and 165 degrees F. <br />2. Ton Containers <br />a) Ton container valves contain no firsible phwy, The c onlainer itself i.s equipped <br />ivilh six threaded fusible plugs, three in each head, spaced approximately 120" <br />apart. <br />Ton Container and Cylinder Inspection, Cleaning, and Reconditioning <br />a) In addition to the required period retest, it is recommended that each ton <br />container and cylinder be infernal" ), Whl cw~s CTnally inspecaed prior to et;�Wh <br />filling, This inclr.rdeS all appurterrrrnces such as valves andfitMs°ible plrtAw. <br />Criteria for Bitch inspection is oullined in "Cylinder and Ton container <br />Procedure for Chlorine Packaging, " Chlorine Institute Pamphlet 17, Sections 3, <br />4, and 5. <br />