Condensate drain HM

automaticmechanical

• Treating small traps as replaceable items makes more sense. • The cost and complication of stocking spare parts are avoided. • The planning of maintenance schedules is minimised. • Replacement sealed traps utilise a non-remakeable joint, eliminating the risk of leaks to atmosphere. Mechanical steam traps Inverted bucket mechanical steam traps Our inverted bucket steam traps employ a well-proven principle which relies on the difference in density between steam (avapour) and condensate (a liquid). They have a robust design and incorporate a simple density sensitive bucket and levermechanism. How an inverted bucket steam trap works 1. As condensate reaches the trap it forms a watersealinside the body. The weight of the bucket keeps the valveoff its seat. Condensate can then flow around the bottomof the bucket and out of the trap. 2. When steam enters the underside of the bucket it givesit buoyancy and the bucket rises. This positions the levermechanism such that the main valve ‘snaps’ shut due toflow forces. 3. The bucket will lose its buoyancy as the enclosedsteam condenses due to radiation losses and steamescapes through the vent hole. Once this happens theweight of the bucket will pull the valve off its seat and thecycle is then repeated. 4. Any air reaching the trap will also give the bucket buoyancy and close the valve preventing condensate flow. Thesmall vent hole positioned at the top of the bucket will lead air into the top of the trap. Because the vent hole at the top ofthe bucket is small in diameter it will vent air very slowly. Where the venting of air may be a particular problem, this canbe overcome simply by fitting an external air vent in parallel.