All-Stainless Steel Material
TLV LA13L is a balanced pressure thermostatic air vent for steam, featuring a compact brass body and a fail-open feature. It automatically vents air until close to steam temperature and reacts immediately to changes in operating conditions.
Features
- Vents air automatically until close to steam temperature.
- Compact yet with high capacity.
- Reacts immediately to changes in operating conditions.
- Easy to maintain and clean, with a hardened stainless steel valve seat.
- Tight shut-off.
WARNING
To avoid abnormal operation, accidents or serious injury, DO NOT use this product outside of the specification range. Local regulations may restrict the use of this product to below the conditions quoted. Do not use for toxic, flammable or otherwise hazardous fluids.
Specifications
| Model | LA13L |
|---|---|
| Connection | Screwed |
| Size | 1/2", 3/4" |
| Maximum Operating Pressure (PMO) | 13 barg (1.3 MPaG) |
| Minimum Operating Pressure | 0.1 barg (0.01 MPaG) |
| Maximum Operating Temperature (TMO) | 200 °C |
| Subcooling of X-Element Fill | up to 22 °C |
| Type of X-Element | C22 |
| Applicable Fluid | Steam |
PRESSURE SHELL DESIGN CONDITIONS (NOT OPERATING CONDITIONS): Maximum Allowable Pressure (PMA): 16 barg, Maximum Allowable Temperature (TMA): 220 °C.
Configuration and Materials
| No. | Description | Material |
|---|---|---|
| 1 | Body | Brass C3771 |
| 2 | Cover | Brass C3771 |
| 3 | Valve Seat | Stainless Steel SUS420F |
| 4 | X-Element | Stainless Steel |
| 5 | X-Element Guide | Stainless Steel SUS304 |
| 6 | Spring Clip | Stainless Steel SUS304 |
| 7 | Screen | Stainless Steel SUS304 |
| 8 | Cover Gasket | Fluorine Resin PTFE |
Dimensions
| Size | L (mm) | H (mm) | A (mm) | B (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1/2" | 64 | 70 | 20 | 38 | 0.5 |
| 3/4" | 66 | 77 | 27 | 40 | 0.5 |
Air Venting Capacity
Differential Pressure is the difference between the inlet and outlet pressure of the air vent. Capacities are equivalent capacities of air at 20 °C and atmospheric pressure.
Proper Installation and Piping
- Install the air vent at a point where air tends to collect (essentially a place away from the steam inlet of the equipment).
- Install the air vent vertically with the arrow on the body pointing in the direction of flow. DO NOT install the air vent upside down.
- To protect people from hot air or steam from the outlet, connect a pipe leading to a pit, but do not submerge the pipe in water.
Operational Check
A visual inspection can be done to help decide about necessary immediate maintenance or repair if the air vent is open to atmosphere.
- Normal: The sound of flow can be heard while air is discharged. When air discharge finishes, the valve closes along with slight discharge of steam.
- Blocked: No air is discharged. The air vent is quiet and its surface temperature is low.
- Blowing: Live steam continually blows from the outlet and there is a continuous metallic sound.
- Steam Leakage: Live steam is leaking through the outlet, accompanied by a high-pitched sound.
Troubleshooting
| Problem | Cause | Remedy |
|---|---|---|
| No air is discharged or poor discharge | X-element stuck to valve seat / Valve seat blocked / Screen clogged | Clean parts or replace with new valve seat/cover |
| Steam is discharged or leaks | Rust or scale between X-element and valve seat / X-element or seat damaged | Clean parts or replace with new X-element/valve seat |
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