RIEGER offers as a special on the market this variant of the double seat bottom seat valve, in addition, the function of a changeover valve is realized.
The advantage over the usual pass dual seat bottom seat valves is that the pipeline during filling or emptying of the tank is not filled.
The pipeline is open only to the tank to be filled.
Thus, an additional risk of contamination is avoided by otherwise necessary shut-off valves.
| Material | product contact optional not product contact | 1.4404/AISI316L 1.4435/AISI316L 1.4301/AISI304 | |
| Seals | O-rings/gaskets | EPDM | |
| Temperatures | maximum | EPDM | |
| operating temperature sterilisation temperature | 130 °C* 150 °C* short-time (approx. 20 min) | ||
| Operating pressure | closing pressure control air pressure | max. 4 bar in the Tank max. 10 bar in the Pipe min 6 bar - max. 10 bar | |
| Surfaces | product contact optional not product contact | Ra <= 0,8 µm e-polished, other surfaces on request Ra <=1,6 µm | |
| Connections Standard- pipe classes | DIN 11850-R2 (DIN 11866 A) O.D.-Tube (DIN 11866 C) | ||
- available with turned-to-body flange,
- alternatively with separate weld-in flange
- or pipe end to the tank
- also available with only one port
- one-piece solid valve housing
- no welding distortion
- water hammer safe up to 20 bar
- balanced valve disk
- low control air consumption
- standard actuator with lift function
- service possible without compressed air
- Valve seat removable downwards
- radial sealing of both valve seats
- in the product area only 4 seals
- seal replacement without special tools
- contact with product 316L
- inner surface Ra <= 0,8 µm (standard)
- leakproof up to 4 bar tank pressure and 6 bar pipe pressure
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