Nederman FlexFilter EX Instruction Manual page 38

EN FlexFilter EX
7.3
38
The pressure drop over the control filter is monitored, and a signal is sent the
control unit if above set value. Pressure difference is preset at 4 kPa /40 mbar
/ 0.58 PSI. The pressure switch is located in the control box (see picture no. 19
/ 2).
The different components of the control filter (see picture no. 7) are:
1. Inlet
2. Outlet
3. Housing
4. Vacuum measuring point (+)
5. Vacuum measuring point (-)
6. Ground cable
7. Lid retainers (x4)
8. Frame bracket
9. Filter cartridge
Twin Valve Feed out Device "TVFD"
The functional description of the TVFD refers to picture no. 8 / A-C.
A) In normal mode the upper valve is open and the lower valve is closed.
Material from the dust collector passes the open valve and is collected in
the air lock between the valves.
B) Emptying of collected material begins with the closing of the upper valve.
C) After complete closing of the upper valve, the lower valve opens and
collected material is dropped into the Bulk-bag or container.
The sequence is run in reverse order and the TVFD returns to normal
collection. The feed out time and frequency can be adjusted in the control
system in order to adapt to different material flow. See chapter 12. Electrical
installation for detailed information.
Picture no. 21 shows the components of the TVFD EX Valve.
1. Upper Slide Valve, USV
2. Lower Slide Valve, LSV
3. Container
4. Outlet
5. Slide Valve Covers (x4)
6. Terminal box Cover
7. Terminal box
8. Nipple (compressed air)
9. Stop switch
10. Manometer
11. Reset button
12. Silenced exhaust regulators (regulates valve closing speed)
13. Quick exhaust valve
14. Manual override
Picture no. 22 shows a compressed air diagram for the FlexFilter EX with TVFD.