Built for process
Wafer trap for high-flow processes, fitted between flanges.
No moving parts
Works on a hydrodynamic principle with sized venturis. There is no disc, float or bimetal to wear out.
Usually no strainer
Its venturis are large enough that most high-flow processes need no strainer.
Between flanges
Wafer format fitted between flanges, with a length adjustable to your installation.
Up to 100 barg at 450 °C
100 barg PMO up to 450 °C and 550 °C TMO at zero pressure.
Shell and tube heat exchangers
Condensate discharge from the steam side under variable load.
Air heaters
Steam coils and batteries heating process air.
Calorifiers and reboilers
Process equipment with variable steam demand.
Cooking vessels
Jacketed vessels with heating cycles.
Compare the connections
The versions share the design and main components. The connection changes, and with it the operating limits.
Configuration
Choose the options to see the dimensions, weight and limits of your trap.
- Size
- ½" (DN15)
- Connection
- Wafer
- Dimension A
- 5.90 in · 150 mm
- Approx. weight
- 2.86 lb · 1.3 kg
- PMO
- 1,450 psig at 842 °F
Dimensions
Dimensions and approximate weight for each size.

| Size | A ** | Approx. weight |
|---|---|---|
| ½" (DN15) | 5.90 in150 mm | 2.86 lb1.3 kg |
| ¾" (DN20) | 5.90 in150 mm | 2.86 lb1.3 kg |
| 1" (DN25) | 6.30 in160 mm | 3.3 lb1.5 kg |
** The length can be adjusted to your installation. The highlighted row is the size selected under Configuration.
Operating range
Pressure and temperature limits with the saturated steam curve for reference. Enter your pressure to check your application.
Check your application
Enter your line saturated steam pressure. We calculate the saturation temperature and compare it with the operating area.
- Saturation temperature
- 364 °F · 184 °C
- Allowable pressure at that temperature
- 1,450 psig
Components and materials
304L body and removable 316 inlet nozzle.

| No. | Part | Material |
|---|---|---|
| 1 | Trap body | 304L stainless steel |
| 2 | Inlet removable nozzle | 316 stainless steel |
| 3 | Gasket | Graphite with stainless steel reinforcement |
Spare parts
| Part | Code |
|---|---|
| Nozzle gasket | G-3 |
Frequently asked questions
What maintenance and engineering teams ask us most about the WF trap.
What applications is the Fenix WF steam trap designed for?
A wide range of flows and almost any process, such as shell and tube heat exchangers, air heaters, reboilers and cooking vessels. It is best suited to high-flow processes.
What is the maximum operating pressure of the WF?
WF: 1,450 psig (100 barg) at 842 °F.
What sizes and connections does the WF come in?
½" (DN15), ¾" (DN20), 1" (DN25). Connections: Wafer, between flanges.
How is the WF maintained?
The inlet nozzle is removable and its gasket (G-3) is supplied as a spare part. In most cases no strainer is needed.
Does the WF need a strainer?
In most cases no: its venturis are large enough not to require one.
What warranty does the Fenix WF trap have?
The Fenix WF trap has a 15-year warranty.
What spare parts are available for the WF?
Nozzle gasket (G-3).
Fenix strainer, designed and made by Fenix
A trap only works well if the condensate reaching it is clean. That is why Fenix designed and makes its own strainer, and guarantees it for 15 years, the same as the trap.