1. The old water system has a paddle flow switch and flow indicator that sticks in the open position, which is a safety issue.
2. New System - Advantages of Digital Flow Systems:
   • Longer life of flow sensor compared with Flotek brand sensors.
   • No moving parts in flow sensor, therefore less sensitive to Calcium Oxide and other mineral buildup typical in "flapper" style flow sensors.
   • Provides for direct visual feedback of water flow with "red light/green light" indicator lights on each individual sensor - greatly helps with troubleshooting water flow problems.
   • No glass site windows that get clogged, or discolored after 1-2 years.

1. Old design, hot zone graphite felt with graphite yarn sewn to stainless steel body, doors, etc.
2. New design single or multi layered rigid graphite board fastened with CFC threaded rod and HLM nuts. For a harsh environment, add CFC plate on the hot-face to protect the rigid graphite board.

1. Old design, Humphrey air valves on manifold.
2. New design, SMC air valve on air manifold for half the cost and less downtime.

1. Old design, one (1) color and two (2) color pyrometer temperature sensing system with gray box, etc. that are not as accurate as the new style pyrometer.
2. New design, two (2) color pyrometer temperature sensing system which is more reliable, and accurately reads temperature directly on the controller. C/VI will also offer an auto T/C cross-over combination T/C to the OP.

1. C/VI offers several sizes, 2Hp, 5Hp, 10Hp, and 25Hp Vacuum Inert Gas Cooling Fans.
2. Reduce Thermal Cycle that would allow Customer to run more cycles per week.
3. Options to add Heat Exchanger, Variable Speed Control, Front and Rear Shutter Actuators.

• • Examine elements and feedthroughs for damage.
  • Examine heat shields for damage or severe distortion.
  • Check thermocouples and insulators for damage, heavy vapor deposits. Replace, as necessary.
  • Remove heat exchanger/fan assembly annually, remove debris, examine for damage. Clean & reassemble.

• • Verify Operation of Pneumatically controlled valves.
  • Check for and repair leaks in system.
  • Clean inline filter and drain water trap.
  • Check operation of optional emergency air backup.

• • Drain mechanical pump and replace oil.
  • Check Vacuum Sensors functionality and accuracy.
  • Drain diffusion pump & check condition –
  • Replace if contaminated.
  • Lower diffusion pump & clean –
  • Quarterly plan if excessive use is involved.
  • Dismantle & clean hi-vac roughing & backing valves –
  • Replace seals as necessary.

• • Inspect water system for leaks.
  • Verify loss of water flow Interlocks.
  • Check gas system for leaks.
  • Check for correct gas control operation.

• • Validate Temperature Sensors and Calibration Services.
  • Verify functionality of Temperature Control Loops and wiring.

Check all safety interlocks and alarms.

• • Mass Spectrometer Helium leak check of entire system.
  • Carry out rate of rise and ultimate vacuum testing.

CUSTOMER MODIFICATIONS: Note all Customer specifications.

• • Inspect all relays.
  • Inspect all contactors for excessive wear –
  • Replace where necessary.
  • With clean compressed air, blow down transformers.

Run power supply and check out SCR controllers.

• • Inspect retort and shielding for damage. Note discrepancies.
  • Inspect retort and hot zone supports for damage or distortion.
  • Inspect elements for distortion and possible grounding.
  • Check gas inlet/binder exhaust tubes for damage or blockage
  • Inspect manifold insulation and heat tape and thermostats.
  • Check vacuum valves/throttle valves for operation.
  • Run mass flow controllers to verify control.
  • Check all Hydrogen safety interlocks and alarms.

• • Upon service completion, carry out a full furnace cycle in conjunction with user & check operation of equipment.  If possible, record data for future comparison.

Notify user that service is complete & obtain signature on service report.

• • Inspect for leaks.

This listing is not inclusive of all the CVI Field Service can offer.

Contact Aftermarket Services for a customized service plan.