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Steam Traps

Thermostatics Steam Trap – Balanced Pressure Type (BP)

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Steam Traps

Thermostatics Steam Trap – Balanced Pressure Type (BP)

The operating principle is based on the balance between the steam pressure and the internal pressure of the thermostatic membrane capsule, hermetically sealed and filled with a volatile fluid whose saturation temperature is lower than steam at any pressure. At start up the trap is wide open, freely discharging air, non-condensable gases and cool condensate. When the steam reaches saturation temperature, vaporization of the liquid inside the capsule creates a pressure differential which will shut the discharge orifice thus preventing any steam loss. When condensate inside the trap cools, the vaporized filling inside the capsule condenses thus reducing the internal pressure allowing the opening of the trap for discharge again.
Steam Traps

Thermodynamic Steam Trap – Disc Type (TD)

Steam Traps

Thermodynamic Steam Trap – Disc Type (TD)

The thermodynamic disc type is probably the simplest trap on the market and yet is the most widely used. The disc trap is made up of three primary components: the body, the cap and the disc. This type of trap is operated by the internal energy of steam. Condensate and air entering the trap raise the disc and flow continuously throughout the discharge orifice. Steam entering the trap expands suddenly as it reaches the underside of the disc. The resulting high flow velocity (kinetics energy) causes a decrease in pressure under the disc  (Bernoulli’s Principle). Steam above the disk is stationary, therefore at higher pressure, forcing the disc onto the seat and closing the trap. When condensate appears at the trap inlet, the steam above the disc condenses releasing the pressure and allowing the discharge cycle to repeat.
Steam Traps

Thermostatic Steam Trap – Bi-Metallic Type (BM)

Steam Traps

Thermostatic Steam Trap – Bi-Metallic Type (BM)

The bi-metallic trap operates under the principle of thermal expansion of metals. Two dissimilar metals are joined into a series of discs and upon heating will deflect to provide movement to close off the valve. When cold condensate and air are present, the bi-metallic elements are flat and the trap remains open discharging condensate and air from the system. When steam approaches the trap, condensate temperature increases making the bi-metallic elements expand until the valve closes and stops discharging. When the condensate reaches the set subcooling the trap will open again.
Steam Traps

Mechanical Steam Trap – Float + Thermostatic Type (FT)

Steam Traps

Mechanical Steam Trap – Float + Thermostatic Type (FT)

Float and thermostatics steam traps provide immediate and continuous discharge of condensate, air and non-condensable from a steam system as soon as they reach the trap. The float element is normally a ball type, connected by a lever assembly to the main valve head. As condensate reaches the trap the ball float rises positioning the valve to discharge the condensate at the same rate as it reaches the trap. The response is immediate and the discharge fully modulating and continuous. The condensate level is always maintained above the main valve providing a positive water seal which prevents any steam leakage. The internal thermostatic air vent unit immediately discharges all air and non-condensable gases that reach the trap. This assures maximum condensate capacity through the main valves at all times.
Steam Traps

Mechanical Steam Trap – Inverted Bucket Type (IB)

Steam Traps

Mechanical Steam Trap – Inverted Bucket Type (IB)

The inverted bucket traps respond to the difference in density between steam and condensate and operate on the principal of an inverted water glass (the component referred to as the bucket). The inverted bucket is attached on the valve head by a lever mechanism and operated to open and close the trap. On start-up the bucket, by its own weight, rests on the trap bottom and the valve is open discharging air and non-condensable. When reaching the trap, condensate makes the bucket float (because of air inside) and rise until it closes the discharge orifice. A small hole in the top of the bucket allows air vent and let condensate in until the bucket slowly sinks to the trap bottom opening the valve. Condensate is discharged until steam enters the trap filling the bucket which rises and closes the trap. Steam will be vented through the hole in the bucket and the cycle is repeated providing an intermittent type discharge.
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