AMM790 check valve for flue gas
Product information
The AMM790 check valve is a valve for flue gas up to a maximum operating temperature of 200ºC. Flue gas systems are characterized by a low operating pressure so these valves are manufactured from sheet material as standard and are suitable for an operating pressure of up to 0.5 bar. This series of flue gas valves is fitted with a standard bonnet and bracket making it unsuitable for insulation. The valve is designed so that the stuffing box gasket pusher and bolts are not subject to temperature in the pipe, allowing the stuffing box gasket to be serviced from the outside at all times (outside operation).
Depending on the design, different leakage rates can be achieved:
- No seat: rate I ANSI/FCI 70-2 (= relative tightness)
- Metal to metal seat: rate II ANSI/FCI 70-2 (leakage = 0.5% x Kvs)
- Soft seat: rate III ANSI/FCI 70-2 (leakage = 0.1% x Kvs)
- Compressed air system: rate VI ANSI/FCI 70-2 (zero leakage)
Specifications
- Diameter: DN100 to DN2500
- Pressure class: maximum 1.5 barg
- Temperature range: up to 200ºC
- Connections: wafer type, flanged, welding ends
- Housing material: S275JR, SS 304, SS 316 or special alloys
- Material seals: metal seat, graphite, silicone, viton, PTFE
- Operation: manual (worm gearbox), pneumatic, electric.
- For open/close function and modulating function
- Available with accessories such as purge connections, mechanical limitation, etc.
- Available including EN 10204 2.2, 3.1 and 3.2
Application
The check valve for flue gas type AMM790 is mostly used for air and flue gases with a relatively low temperature where critical components must be protected from the fall back of the medium. These valves are fully customizable to your requirements.
Standard part of the delivery is a general arrangement drawing and a 3D file for approval. After approval of the proposed design, we will start production. This avoids surprises and guarantees that valves can always be fitted appropriately.
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