Hopkinsons® Uniflow Slide Valve

Hopkinsons Uniflow Slide Valves are specially designed for one-way isolation and blowdown duties where there’s no possibility of reversal flow. The Hopkinsons Uniflow Slide Gate Valve has been used for many years on drain, blow-down and other auxiliary services, especially in medium- and high- pressure installations. It’s manufactured in sizes up to and including 1½ in. bore with flange or buttweld connections according to temperature and pressure requirements. As the name implies, the design is for one-way flow only. And when there’s any possibility of a reverse flow, it can be used in series with a non-return valve fitted at the outlet. The Hopkinsons ‘uniflow’ valve is an adoption of the parallel slide valve principle but uses only one disc which slides over the face of the seat, to which it’s firmly held by fluid pressure in normal working conditions and by a light spring when not under pressure. The valve is fully opened or closed by a half-turn of the handle or handwheel. To prevent rotation beyond these limits, stops are incorporated in the index plate. This plate is large, clearly marked and easy to read and can be engraved to suit foreign language requirements. No lubrication is required with this type of valve. Maintenance and the fitting of replacement parts are easily carried out, as the valve can be easily dismantled without the aid of special equipment. In addition, there are no welded joints to be broken in order to gain access to the internals.