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.
Available size
| 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 |
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