The By-Pass Valve is a rotational circulating valve. This valve opens or closes off communication between the tubing and the annulus. The valve is used to bypass tubing fluid when running or retrieving Selective Tools, and if required can also be used for circulation of fluids. The By-Pass Valve features a pressure balanced sleeve design which allows for easy operation of the valve under high differential pressures. Specially designed chemical and wear resistant seals ensure reliable and trouble free operation. Exclusive to this valve are the Thrust Bearings which allow for easy operation under tension or compression loads. Often used with Renown’s Hydraulic set casing patch.