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>>2509016Lookup "portable valve actuator" and really think about what you're trying to do and what effects it could have if it goes wrong. Opening/closing valves too fast, not knowing valve gate position, or not being able to close a valve once opened, have contributed to killing hundreds of thousands of people globally in industrial accidents since the industrial revolution. If your valves are old and rusty I'm thinking your work site doesn't have adequate facility maintenance and therefore safe practices might be lacking or absent.I am a system safety engineer, trust me when I say you wouldn't believe the seemingly benign shit people do that ends up being the first domino that triggers catastrophe. Good luck and be safe.