Description
Spirax Sarco AVC32 is a repairable pressure-balanced thermostatic air vent made of carbon steel, with a built-in flat filter and in-line connections for steam systems. All pressure-containing components are supplied by TÜV-certified suppliers, and the manufacturing process complies with AD-Merkblatt WO/TRD100 standards.
Standard: This product complies with the European Pressure Equipment Directive 97/23/EC. Certificate: An EN 10204 3.1.B material certificate is available for this product. Note: Please specify the certificate requirement when placing the order.
Sizes and Pipe Connections
½”, ¾” and 1” threaded connections, BSP or NPT.
½”, ¾” and 1” socket-weld connections to BS 3799.
½”, ¾” and 1” butt-weld connections to EN 12 627.
DN15, 20 and 25 flanged connections to EN 1092 PN40.
ANSI B 16.5 Class 150 and 300, JIS/KS 10K and JIS/KS 20K.
Operating Range and Limitations (ISO6552)
| Valve design condition | PN40 |
|---|---|
| PMA - Maximum allowable pressure | 50bar g@50 ℃ |
| TMA - Maximum allowable temperature | 400°C@35 bar g |
| Minimum allowable temperature | -60 ℃ |
| PMO - Maximum saturated steam pressure | 32 bar g |
| TMO - Maximum operating temperature | 287°C@32 bar g |
| Minimum operating temperature | 0 ℃ |
| Maximum design cold hydraulic test pressure | 75 bar g |
Kv Values
| Size | DN15 - ½” | DN20 - ¾” | DN25 - 1” |
|---|---|---|---|
| Kv | 0.8 | 0.8 | 0.8 |
Conversion formulas: Cv(UK) = Kv×0.963 Cv (US) = Kv×1.156
Materials
| No. | Component | Material |
|---|---|---|
| 1 | Bonnet | DIN 17243 C22.8 (W/S 1.0460)/carbon steel ASTM A105N |
| 2 | Capsule | Stainless steel |
| 3 | Seat | Stainless steel BS 970 431 S29 |
| 5 | Filter screen | Stainless steel AISI 304 |
| 7 | Bonnet gasket | Stainless steel-reinforced sheet graphite |
| 8 | Body | Carbon steel DIN 17243 C22.8 (W/S 1.0460)/ASTM A105N |
| 9 | Bonnet bolts | Stainless steel (M10 x 30) A2-70 |
| 17 | Spring | Stainless steel |
| 18 | Baffle | Stainless steel |
Weight
| Size | Threaded/Welded Weight | Flanged Weight |
|---|---|---|
| ½”DN15 | 1.4kg | 2.9kg |
| ¾”DN20 | 1.4kg | 3.5kg |
| 1”DN25 | 1.5kg | 4.1kg |
Installation Notes
Install AVC32 with the capsule in a horizontal position and the bonnet at the top.
AVC32 should be installed where air is likely to accumulate, such as at the highest point of a steam main or piece of equipment. The discharge outlet should be directed to a safe location.
For ease of maintenance, isolation valves are recommended upstream and downstream of the air vent. The air vent should not be insulated.
Disposal Information
This product is recyclable and will not create an ecological problem when properly disposed of.
Ordering Information
Example: 1 - Spirax Sarco ½” AVC 32 air vent, BSP threaded connection.