All-Stainless Steel Material
Product Overview
Spirax Sarco AVC32 is a repairable pressure balanced thermostatic air vent valve, manufactured from carbon steel with a built-in flat plate filter, featuring straight connection design, specifically designed for steam systems. All pressure-bearing components are provided by TÜV-certified suppliers, and the production process strictly follows AD-Merkblatt WO/TRD100 standards, while also complying with the European Pressure Equipment Directive 97/23/EC. With stable and reliable performance, it effectively vents air from steam systems, ensuring efficient system operation.
Core Technical Parameters
Pressure and Temperature Range
- Maximum Allowable Pressure (PMA): 50bar g@50℃
- Maximum Allowable Temperature (TMA): 400℃@35bar g
- Minimum Allowable Temperature: -60℃
- Maximum Saturated Steam Pressure (PMO): 32bar g
- Maximum Operating Temperature (TMO): 287℃@32bar g
- Minimum Working Temperature: 0℃
- Design Maximum Cold Water Test Pressure: 75bar g
Port Sizes and Flow Parameters
| Port Size | DN Specification | Kv Value |
|---|---|---|
| ½" | DN15 | 0.8 |
| ¾" | DN20 | 0.8 |
| 1" | DN25 | 0.8 |
Conversion Formulas: Cv(UK) = Kv×0.963; Cv (US) = Kv×1.156
Connection Types
The AVC32 air vent valve provides multiple connection options to meet different installation requirements:
- Threaded Connection: ½", ¾", 1" (BSP or NPT standard)
- Socket Weld: ½", ¾", 1" (BS 3799 standard)
- Butt Weld: ½", ¾", 1" (EN 12627 standard)
- Flange Connection: DN15, 20, 25 (EN 1092 PN40, ANSI B 16.5 Class 150/300, JIS/KS 10K/20K)
Dimensions and Weight
Dimension Details (Unit: mm)
| Port Size | A | A1 | B | C | D | E (Valve Seat Assembly Disassembly Distance) |
|---|---|---|---|---|---|---|
| ½" DN15 | 95 | 150 | 94 | 64 | 17 | 37 |
| ¾" DN20 | 95 | 150 | 94 | 64 | 19 | 37 |
| 1" DN25 | 95 | 160 | 94 | 64 | 23 | 37 |
Weight Details (Unit: kg)
| Port Size | Threaded/Welded | Flange |
|---|---|---|
| ½" DN15 | 1.4 | 2.9 |
| ¾" DN20 | 1.4 | 3.5 |
| 1" DN25 | 1.5 | 4.1 |
Component Materials
| No. | Component Name | Material Specification |
|---|---|---|
| 1 | Cap | Carbon Steel (DIN 17243 C22.8 / W/S 1.0460), ASTM A105N |
| 2 | Capsule | Stainless Steel |
| 3 | Valve Seat | Stainless Steel (BS 970 431 S29) |
| 5 | Filter | Stainless Steel (AISI 304) |
| 7 | Cap Gasket | Stainless Steel Reinforced Laminated Graphite |
| 8 | Body | Carbon Steel (DIN 17243 C22.8 / W/S 1.0460), ASTM A105N |
| 9 | Cap Bolt | Stainless Steel (M10 x 30, A2-70) |
| 17 | Spring | Stainless Steel |
| 18 | Baffle | Stainless Steel |
Installation and Usage Instructions
Installation Tips
- During installation, ensure the capsule is in a horizontal position with the cap at the top.
- Should be installed at locations where air tends to accumulate, such as the highest point of steam mains or equipment, with the discharge port directed to a safe area.
- For ease of maintenance, it is recommended to install shut-off valves upstream and downstream of the air vent valve, and the air vent valve should not be thermally insulated.
Safety and Maintenance
For detailed installation, maintenance, and safety operation information, please refer to the Installation and Maintenance Guide (IMP123-14) provided with the product. The product is recyclable and will not cause ecological problems when properly disposed of.
Ordering Instructions
Product Ordering Example
1-Spirax Sarco ½" AVC32 air vent valve, BSP threaded connection.
Recommended Tightening Torque
| Part No. | Component Name | Specification | Tightening Torque (Nm) |
|---|---|---|---|
| 3 | Valve Seat | - | 115-125 |
| 9 | Cap Bolt | M10X30 | 23-27 |
Spare Parts Information
Available Spare Parts List
| Spare Part Name | Specification | Corresponding Part No. |
|---|---|---|
| Capsule and Valve Seat Assembly | - | 2, 3, 17, 18 |
| Filter | 3 pieces/set | 5 |
| Cap Gasket Set | 3 pieces/set | 7 |
Spare Parts Ordering Instructions
When ordering spare parts, specify according to the above spare part names and indicate the air vent valve model and port size. Example: 1-Capsule and Valve Seat Assembly for DN25 AVC32 air vent valve. (Note: Solid lines in the diagram indicate available spare parts, dashed lines are not within the spare parts supply scope)
