Product data sheet
Valve
2-640-28-0800-7008-DT,
November 5, 2024
Seat Valve pneum. direct
Series 2/640 +400°C VA
Valve 2/640-28/0800/7008-DT
Valve closed by spring force in rest position - NC. When the actuator (cylinder) is pressurised the piston (spindle) is lifted of the seat (orifice) directly. Further function like normal open by spring force (NO) is also available. High temperature design up to +400°C with metallic seat sealing and static wills-ring.
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Valve 2/640-28/0800/7008-DT
Datasheet explicit
| Version | 2/640- | |
| Type of valve | Seat Valve pneum. direct | |
| Connection type, valve seat | 28 | G2 50mm |
| Kv-value (Δp = 1 bar H₂O) | ||
| Housing | 08 | AISI 316 Ti - 1.4571(81) |
| Sealing | 00 | Metall/Wills® |
| Function | 7 | CLOSED with spring |
| Design | 0 | straight seat, actuator aluminium |
| Actuator size | 08 | ⌀80 |
| Actuator volume | 260 cm³ | |
| Valve option | DT | distance unit with Wills® seals |
| System pressure | 0 - 6 bar (the max. operating pressure requires a control pressure of min. 6 bar) | |
| Control pressure | 6 - 10 bar | |
| Temperature Medium | from -40 °C to 400 °C | |
| Temperature Environment | from -10 °C to 60 °C | |
| Mounting position | in any position | |
| Specific use case | Closed system (includes open system) | |
| scope of delivery | 1 valve |
Not applicable
| Valve option | DT | distance unit with Wills® seals |
| Description | High temperature version up to +400°C with metallic seat seal, static with Wills® seals. | leakage rate 3 | |
| REACH-RoHS conformity | REACH Yes | RoHS Yes | |
| Customs export | Country of origin Germany; ECCN (US): N; AL: N |