1. Free-Float Steam Trap

Overview

• This is a mechanical steam trap that uses a float to operate the valve, often called a “float trap.”

• We offers Free-Float traps in various types: low-pressure, medium/high-pressure, main line traps, and models with bypass valves.

• Key advantages: continuous discharge, high back-pressure tolerance, durable design with few moving parts.

Construction

• Float: We designs precision-ground spherical floats for tight sealing and minimal wear.

• X-element (air vent section): Automatically vents air using a diaphragm and thermosensitive element. At low temperatures (cold condensate or air), the vent opens; at higher temperatures (steam), it closes.

• Fail-Open Design: If the X-element diaphragm fails, the trap still opens to prevent condensate buildup, ensuring safety.

• Three-Point Seating: Some main-line models use three-point float support to ensure sealing even with very low condensate flow.

Operation

1. Startup: When cold, the X-element contracts → vent opens → cold condensate and air are discharged.

2. Normal Operation: Condensate enters → float rises → main valve opens → continuous condensate discharge; X-element vents any air.

3. Low Condensate: X-element expands with steam → vent closes; float lowers → main valve closes → water seal prevents steam loss.

4. Diaphragm Failure: Fail-open design allows condensate to drain even if the diaphragm breaks.

Applications

• Suitable for heat exchangers, reactors, jacketed kettles, dryers, and other steam equipment.

• High back-pressure tolerance (~90%) makes our company Free-Float traps ideal for closed condensate recovery systems.

2. Disc / Thermodynamic Steam Trap

Overview

• We’re disc-type steam traps are thermodynamic steam traps.

• Popular models include ThermoDyne® A3N and PowerDyne® P-series, HR-series.

• Advantages: minimal steam loss, simple design, easy maintenance, high-pressure tolerance, and resistance to scaling.

Construction

• Valve Disc: Stainless steel, precision-lapped for tight sealing.

• Bimetal Ring: Acts as an automatic air vent at cold startup; it contracts when cold and expands when heated.

• Pressure Chamber: Operates based on pressure differential; some high-pressure models have a steam jacket to reduce thermal cycling.

• Strainer: Built-in screen filters debris for long-term stable operation.

• Replaceable Module: Valve assembly can be replaced without changing the entire trap, simplifying maintenance.

Operation

1. Cold Start: Bimetal contracts → disc held open → initial air and cold condensate are discharged.

2. Steam Flow: Steam enters → bimetal heats → disc lifts → steam jet creates low-pressure under the disc → disc closes.

3. Condensate Discharge: Condensate enters → pressure in chamber drops → disc lifts → condensate is discharged → steam re-enters → disc closes; cycle repeats.

4. No Condensate: Disc remains closed due to chamber pressure; some jacketed models reduce no-load cycling, prolonging service life.

Applications

• Suitable for high-pressure steam lines, main lines, industrial steam equipment, jackets, coils, small boilers.

• High-pressure models (e.g., HR-series) feature steam jackets to reduce heat loss and extend lifespan.

• Simple structure with few moving parts ensures durability under harsh conditions.

3. Specific Product Examples

• J3X-21 Free Float Steam Trap: a free-float model suitable for low to medium pressure applications (≤ 21 bar), widely used in industrial steam process equipment.
• A3N Thermodynamic Steam Trap: a thermodynamic disc type, suitable for low to medium pressure applications (≤ 16 bar), featuring a durable design and excellent tight shut-off.