Operating key (Valve operating wrench) has a coupling at its lower end and a retractable / fixed upper bar attached at the top. Its coupling engages with the stem cap (wrench nut / operation nut) on the NSR valve or underground hydrant, manually to turn the valve stem to open or close the valve.
|Type||Upper bar||End coupling for valve stem cap / wrench nut||Ref. No.|
|Ring key and bar||Retractable||BS type valve, DN50 to DN300||V7701|
|T key||Fixed||BS type valve, DN50 to DN300||V7702|
|T key||Fixed||BS type valve, DN350 to DN600||V7703|
|T key||Fixed||ASME type valve, 2″ to 12″||V7704|