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   Oscillator Valves Manufacturers
E2v Technologies Valves Manufacturers
   
 
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  Q.
How does filament voltage affect the life of oscillator valve?
     
  A.
Ideally the life of the tube is determined by the time taken to evaporate the carbon from carbide layer. This process is called decarburisation. As a result the filament voltage applied to the tube is very critical and it most applications stabilised supply is essential.

Consider a case where filament voltage is 10 Volts and the designed life is 10 to 15,000 hrs. then running at 10.5 Volts will shorten this life to 5 - 7,500 hrs. Again running at 9.5 Volts will lengthen this life to 20-30,000 hrs. A reduction of more than 10% in filament voltage is not recommended because the filament surface may get poisoned.

   
  Q.
How should I protect my valves from over heating?
     
  A.

Always maintain the recommended water / air flow as given in our data sheet for respective model (water / air flow / kW curves). Ensure healthy condition of flow switches and tripping relays. We strongly recommend use of protections like Thermal Fuse / P.T.F.E. activated micro switches and relays. Thermal Fuse is a very reliable device which goes off at designed temperature (70ºC & 95ºC). These Thermal Fuses are available ex-stock at AIMIL.

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  Q.
How should we maintain our valves?
     
  A.

Following activities and operations are recommended.

1. Check quality of water / air (de-mineralised water strongly recommended).
2. Check electronics and operability of protection devices at regular intervals.
3. Check rate of flow of water / air into / out of valve.
4. Monitor temperature in the water, on the valve (filaments, anode) in the chamber etc.
5. Monitor the biasing voltages and currents, take suitable actions.
6. De-scale water fitting and water jackets at regular intervals. Use 5% to 10% Citric or Formic acid solution in water to cleanse the fitting. Flush the water system repeatedly to ensure removal of traces of Citric or Formic acid.
7. Clean air filters regularly to avoid choking.
8. Remove carbon from ceramic, terminals, chamber / oscillator section of the valves to avoid internal arcing.
9. Clean / tighten the connections to / from the valves at regular intervals to avoid heating, melting and thus failure of the valve.
Please contact AIMIL for other recommendations and the details of above checks / procedures.
   
 
Q.

Should we remove valves for cleaning / maintenance?

     
  A.

Due to aging, the filament of the oscillator valves becomes fragile. Therefore we should avoid removing the valve from operation frequently. e2v Technologies applied Technologies also manufactures / supply valve with removable water jackets. These jackets can be removed while the valve is being mounted on the chassis for de-scaling and cleaning. Utmost care should be taken while taking off and mounting the jackets / valves to avoid breakage of filament.

   
  Q.
Does e2v Technologies have equivalent / replacement for Siemens, Thomson, Phillips, BEL, and other manufacturers?
     
  A.
Yes, e2v Technologies supplies equivalents to oscillator valves of different makes and brand like Siemens RS3060CJ, BEL50000, ITK15-2, ITK30-2. While some are direct equivalents, some might require minor modifications in the circuitry and housing.
   
  Q.
Does e2v Technologies valves support applications like RF Drying and wood gluing?
     
  A.
e2v Technologies make valves support various applications like Steel Tube Welding, Induction Hardening, PVC Welding, Pre-heating, RF Drying, Biscuit Drying, Embossing. It also finds applications in Food Processing Industry.
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