1/2″ PB/ST UNION Left
Type S.T. – Double Flow (Stationary Center Tube)
Fitted with an elbow suitable for double flow with a stationary center tube. This gives flow areas through the center tube and annulus. The center tube – provided only if ordered – is fixed to the union end by means of a screw thread (dimension “O”). Flow can pass in through the center tube and return through the annulus or be reversed. For steam applications, the center tube is curved to reach the condensate in the bottom of the cylinder. If the roll neck diameter to length ratio prevents the use of a curved tube, a syphon elbow can be specified instead. See the Accessory Section or contact us for more information about the options available.
The rotary P.B. union has been developed from the rotary R.E. union and utilizes the same well-proven and highly successful bellows seal and bearing system. The body is manufactured from de-zincification resistant brass which has advantages over conventional brass and the cast iron adapter of the rotary R.E. union, especially for water cooling applications.