Operating key (Valve operating wrench)
- Certificate: ISO
- Standard: BS 5163-2
- Material: Aluminum alloy, carbon steel, etc.
- Feature: To operate NRS gate valve or underground fire hydrant
- Surface: Anodized, black painting, etc.
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.