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Product Overview: Buried (lengthened) elastic seat sealing valve (RVZM / MZ45X-16) with maintenance-free and extend the valve stem design, a one-time buried, to avoid the expensive valve shaft cost and the road many times to transform and valve Replacement brings huge investment, beautify the road environment, resistance to rolling, to avoid accidents caused by the loss of manhole cover.Fully valve stem can be customized according to the depth of the valve, the valve stem at the top of the valve switch can be installed to install remote signal device, Valve error switch locking device More Keyword Search: Gate valve