AYVAZ MK-16 Metal Bellows Valve PN16 DN25
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AYVAZ Metal Bellows Valve PN16 DN25
AYVAZ Metal Bellows Valve PN16 DN25 is an industrial shut-off valve with a bellows packing structure, designed to provide maximum sealing, especially in steam and high-temperature applications. Thanks to the metal bellows system, stem leakage is completely eliminated, offering a much longer lifespan and safer use compared to classic packing valves. With its flanged connection structure and durable cast body, it can be used safely in demanding process conditions.
Product Operating Principle
The valve opening and closing movement is transmitted to the valve stem via a handwheel. The stem movement is isolated by a metal bellows, preventing process fluid from leaking through the stem to the outside environment. Thanks to this structure, the valve provides 100% leak-proof sealing even under high temperatures and pressures, acting as a reliable closing element.
Technical Specifications of Bellows Valves
Material Structure
| Body | Cast Iron (EN-GJL-250) |
| Lid | Ductile Iron (EN-GJS400-18-LT) |
| Disk | Stainless Steel (X20Cr13) |
| Seating Ring | Stainless Steel (X12Cr13) |
| Shaft | Stainless Steel (X20Cr13) |
| Metal Bellows | Stainless |
| Packing | Graphite |
| Cover Gasket | Graphite + CrNiSt |
| Bolt | 8.8 |
Pressure – Temperature Values
- -10 °C ~ +120 °C → 16 bar
- 150 °C → 14.4 bar
- 200 °C → 12.8 bar
- 250 °C → 11.2 bar
- 300 °C → 9.6 bar
Areas of Application
- Steam installations
- Boilers and power plants
- Industrial heating systems
- Hot water and superheated water lines
- Process lines
Why AYVAZ Metal Bellows Valve?
– 100% shaft seal thanks to metal bellows.
– Structure suitable for high temperature and steam applications.
– Long-lasting and secure closure performance
– AYVAZ quality and engineering assurance
| Body | : | Iron Casting |
| Pressure Class | : | PN 16 |
| Diameter-Dn | : | DN 25 |