The VDCI MC tank bottom leak chamber valve is intended to cut off the tank from the rest of the process circuit.
Features
- Isolates the tank from the rest of the process circuit
- Body and plug shape provide the tightest seal to the tank wall, without retention area
- Same features as VDCI MC (floating seal, thick body, etc.)
- Leakage chamber washed by pulsing the lower plug
- The leak can be viewed thanks to a controlled microvalve
- Leak free opening
Materials
- Body: stainless steel 1.4404 / 316L
- Shut-off unit: stainless steel 1.4404 / 316L
- Plug seal: PFA
- Other seals: EPDM, fluorinated elastomer (FKM)
- Actuator: stainless steel 1.4301 / 304
Service conditions
- Max. temperature: +140oC/+284oF
- Temperature differential between the upper line and the lower line: max. +90oC/+194oF
- Min. temperature: -5oC/+23oF
- Max. working pressure permissible in the tank: 4 bar (400 kPa)/58 psi
- Max. working pressure in the valve: 7 bar (700 kPa)/102 psi
- Actuator air supply pressure: 5.5 bar to 7 bars (500 to 700 kPa)/80 to 102 psi with ACS control top. Up to 8 bars (800 kPa)/116 psi with direct supply, according to the conditions of operating
- Vacuum resistance: 0.4 cm3/s
Connections
- On tank, with special welded flange
Options
- Steam bearing stem
- Second microvalve to clean the leakage chamber without activating the plugs