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Balanced-Pressure Steam Traps

• Sizes: 1/2" to 2" [15mm to 50mm]
• Maximum operating pressure: 465 psig [32barg]
• Materials: Carbon steel, stainless steel, and alloy steel
• Model: TC2, TC4, TC20, TJ, TJL, TX, TZ

OPERATING PRINCIPLE

is based on a balance between the steam pressure and the internal pressure of a thermostatic element, partially filled with a volatile liquid whose saturation temperature is slightly lower than that of water, at any given preesure. At start-up, the trap is wide open facilitating rapid air removal and discharge of condensate. As the temperature approaches that of the steam, vaporization of the volatile liquid creates a pressure differential, causing bellows to expand and close the valve positively against its seat. As the condensate cools, the volatile liquid condenses and lowers the internal pressure of the bellows. The resultant pressure differential, will favour the external pressure acting on the bellows to retract and open the valve, permitting the condensate discharge cycle to continue.

DOUGLAS ITALIA Technologies

DOUGLAS ITALIA* steam trap and strainer technologies offers a complete line of steam traps to meet process applications around the world.

• Thermodynamic
• Thermostatic
  • Balanced pressure
  • Bimetallic
• Inverted bucket
• Ball float

DOUGLAS ITALIA technologies include

• Steam distribution manifolds
• Condensate recovery manifolds
• Steam trap stations
• Sight glasses