Overview
The Spirax Sarco liquid expansion trap PN 25 (Model No.8, designation TMA LG2) is a fixed-temperature thermostatic steam trap designed for industrial steam and condensate applications. With a robust pressure rating of 25 BAR (362 PSI), this 1/2″ trap delivers reliable condensate removal at a predefined temperature, enabling precise control over steam system efficiency.
Key Features
- Fixed-temperature operation with oil-filled thermostatic element
- Temperature adjustable discharge range: 60°C to 100°C (140°F to 212°F)
- Rated pressure: 25 BAR g (PN25) / 362 PSI
- Maximum allowable temperature (TMA): 250°C
- 1/2″ screwed connection (BSP or NPT available)
- Bronze or stainless steel body construction available
- Cold hydraulic test pressure: 38 BAR g maximum
Technical Specifications
| Pressure Rating (PN) | PN25 / 25 BAR g / 362 PSI |
| Maximum Allowable Pressure (PMA) | 25 BAR g |
| Maximum Allowable Temperature (TMA) | 250°C / 482°F |
| Connection Size | 1/2″ NPT or BSP Screwed |
| Connection Type | PMA / G designation (pressure/gauge) |
| Trap Type | Fixed Temperature Liquid Expansion (TMA, LG2) |
| Operating Temperature Range | 60°C to 100°C setpoint |
| Discharge Capacity | Variable based on inlet conditions |
| Body Material | Bronze (CC491KM) or Stainless Steel |
| Test Pressure (Hydraulic) | 38 BAR g maximum |
| Manufacturer | Spirax Sarco |
Typical Applications
- Industrial steam systems requiring precise condensate drainage
- Process steam applications in food, beverage, and pharmaceutical industries
- Steam main condensate removal
- Heating systems requiring fixed-temperature discharge control
- Systems requiring dependable thermostatic trap operation at moderate to high pressures
Compatibility & Replacements
Compatible With
- Standard 1/2″ NPT or BSP steam piping systems
- Industrial boiler condensate networks
- Steam trap manifolds and condensate collection systems
- Pressure ratings up to 25 BAR (362 PSI)
- Systems designed for PN25 or equivalent pressure class valves
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator before ordering. The Spirax Sarco No.8 PN25 TMA LG2 model designation must match your original equipment specifications.
Works With
- Spirax Sarco trap manifold systems
- Condensate recovery pump units
- Industrial steam and heating control systems
- Trap test equipment and sight glasses for performance verification
