K LA21 Thermostatic Air Vent for Steam
User Manual
Features
Compact all stainless steel air vent with “fail open” feature for steam, for vertical installation.
- Vents air automatically until close-to-steam temperature.
- Compact yet with high capacity.
- Reacts immediately to changes in operating conditions.
- Withstands superheat and waterhammer.
- Easy to maintain and easy to clean.
- Hardened stainless steel valve seat.
- Tight shut-off.
Specifications
| Model | LA21 |
| Connection | Screwed |
| Size (mm) | 15 |
| Max. Operating Press. (MPaG) PMO | 2.1 |
| Min. Operating Press. (MPaG) | 0.01 |
| Max. Operating Temp. (˚C) TMO | See graph at right |
| Sub cooling of X-element Fill (˚C) | Up to 22 |
| Type of X-element | T |
PRESSURE SHELL DESIGN CONDITIONS (NOT OPERATING CONDITIONS):
Maximum Allowable Pressure (MPaG): 6.3
Maximum Allowable Temperature (˚C): 425
CAUTION : To avoid abnormal operation, accidents of 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.
| No. | Description | Materials | JIS | ASTM/AISI* |
| 1 | Body Lower Part | Cast Stainless Steel | SCS13A | A351 Gr. CF-8 |
| 2 | Body Upper Part | Cast Stainless Steel | SCS13A | A351 Gr. CF-8 |
| 3 | X-element | Stainless Steel | – | – |
| 4 | Valve Seat | Stainless Steel | SUS630 | AISI630 |
| 5 | Screen | Stainless Steel | SUS304 | AISI304 |
| 6 | Spring Clip | Stainless Steel | SUS304 | AISI304 |
| 7 | Nameplate | Stainless Steel | SUS304 | AISI304 |
*Equivalent
Dimensions
LA21 Screwed*
(mm)
| Size | L | ɸW | Weight (kg) |
| 15 | 55 | 47 | 0.4 |
*Rc(PT), other standards available
