Watered Descending Ring Baffle Cool

Features:

  • Backstreaming of diffusion pump fluids reduced by factor of 105.
  • Conductance increased 50% to 100% over comparably sized conventional chevron-type baffles.
  • Optically dense to all hot surfaces.
  • Can be used in ambient or water cooled mode.
  • Quickly assembled – accurately aligned with any ASA 150 # flange system.
  • Condensed pump fluids cannot drop on hot jet assembly and re-evaporate.

Description:

Water cooled or ambient type baffles are added above diffusion pumps to reduce the back migration (Backstreaming) of the pump oil which emanates from the hot jet assembly.  In a properly designed pump the greatest majority of oil vapor strikes the water cooled pump casing, condenses, returns to the pump boiler, and is not a contributing source to Backstreaming.

The descending ring baffle was specifically designed with the size and placement of the rings precisely positioned to make the baffle optically dense to all hot surfaces.  Oil condensed on the baffle returns to the cold pump casing along guides; not dripped on the hot jet where only re-evaporation can take place.  The baffle was further designed to allow most gasses from the system to pass unimpeded into the diffusion pump.  The design thus produces the highest possible conductance for system gases while still performing its basic function of condensing Backstreaming oil vapor.

The DAB baffles were designed for maximum utilization of the high speed and high throughput of the Cooke DPD diffusion pump series, although they may be used with other pumps.  The baffles are compatible with the auxiliary top jet baffling such as the Cooke TNB (top nozzle baffle) when desired system operation requires ambient or water cooled baffling, the Cooke Vacuum DAB Series assures minimum Backstreaming and maximum pump speed.

For more info or pricing on this product, please click on: Request Information and include part: "Water Cooled Descending Ring Baffle"

Cooke related components
For maximum performance couple
DAB series with these components

Size

Cold Trap

Diffusion Pump

Ambient H2O baffle

Valve

2”

4200 LL

DPD2-325

DAB-2A/S

3400,5000

4”

4210 LL

DPD4-1250

DAB-4A/S

3000,5010

6”

4220 LL

DPD6-2400

DAB-6A/S

3100,5020

10”

4230 LL

DPD10-5300

DAB-10A/S

3200,5030