Patent ID: 7478646

Claim:
An apparatus for attachment to a valve, comprising: a first housing and a second housing hingedly attached to the first housing, the first and second housings, when in an opposed relationship defining a cavity and an opening into the cavity for receiving and enclosing a discharge element of the valve to prevent unauthorized access to and removal of material from the valve; a fastener for securing the first housing and the second housing in a closed position to revent unauthorized withdrawal of chemical through the valve and at least one guard member to limit access to the fastener; a first flange having an opening therein on the first housing and a second flange having an opening therein on the second housing, the first and second flanges positioned so as to align the recited openings when the first and second housings are in an opposed relationship so as to allow the fastener to be introduced through the recited flanges to fasten the first housing to the second housing; at least one protective edge extending from the first flange; and wherein at least one guard member extends generally perpendicular from the second flange and abuts the at least one protective edge of the first flange to obstruct transverse access to the fastener.