Accessories - Steam Syphons

Duff-Norton Syphon Elbow Features: Ease in installation and leak-tight sealing Recommended for slow speed applications only where the condensate is still in the puddle stage. Constructed of brass and stainless steel for a long, problem-free life. Fused stainless steel hinge for added strength. Application The Duff-Norton Syphon Elbow is ideally suited for slow-moving applications in which condensate must be removed from a revolving drum. It is a perfect partner for the Duff-Norton Type “S” joint as shown.	Size(in NPT) Order Number Oriffice Size(in) OD (in) Extended Length(in) Approx. Weight(oz) For Joint Sizes From(in) 1/4 489050 1/4 15/16 2 25/32 8 1 3/8 489051 7/16 1 1/4 3 5/8 11 1 1/4 1/2 489052 7/16 1 1/4 3 5/8 11 1 1/2 3/4 489053 11/16 1 21/32 4 1/16 23 2 1 489054 27/32 2 1/32 2 1/32 46 3 Note: O.D. of some elbows are too large for joints with standard syphon taps. Use larger joint or smaller syphon.
Rotating Syphons Cans which rotate at over 800 to 1,200 surface feet per minute with complete rimming can function more efficiently if a rotating syphon with the pick-up head is located very close to the inside surface, in the range of .070 to .100 inches. To maintain this close distance, a “stand-off” contact must be made with the I.D. of the can. Duff-Norton has three rotary syphon designs available for use in the following applications: Where a worker can enter the can and assemble the syphon. Where only a hand hole is available. Where there is no access hole. The most prevalent problem with rotary syphons is movement of the head inside the can.  If this head is held in place by friction, vibration and the impact of cascading water can cause movement of the head and thus misalignment of the “tailpipe.” If the can has a manhole and plant shutdown conditions are such that a person may enter the can, we recommend a custom designed “banded” syphon. Total effective contact force is approximately 15 times the single strut contact force.  Even if this structure moves,	the tailpipe will still remain on the centerline of the can. For instances where the hole in the can is only large enough for a person’s arm, a tube supported right angle elbow design is recommended. This syphon is completely supported from a heavy flange on the outside end of the journal. The radial pick-up leg is inserted through the armhole and held in position while the support tube is inserted through the journal and screwed to the leg. After engagement, the parts are moved nearer the midpoint of the can and bolted to the outer end of the journal. The pick-up head is placed against the wall with a standoff projection to control the clearance. For the dryer cans without any entry holes, or if for other reasons it is desired to assemble completely outside the can, a custom-built tri-axial rotating syphon is available. This uses an intermediate thread on an angle with both the support tube and the pick-up leg, such that rotation of the leg 180° from the tight position causes the leg to be in line with the tube. After insertion through the journal, a long “screwdriver” tool is used to tighten the leg into the “bent” position, placed against wall of the can, with a stand-off to control the clearance.