1. Should stay the valve handle rotating position
2. Not to be used as throttling.
3. The belt transmission's ball valve should be installed upright.
4. Please use the product according to the right, to ensure that the service life of the product, such as unusual situation, that is, please call national unified service hotline 400-666-1929, we will provide you with the high quality post-sale service, give you a satisfactory reply.