Electro-Chemical Devices (ECD) T80 - Manual (Page 53)

Although the insertion configuration can be used as a flow-through mounting by inserting the S80 sensor into a
pipe tee, ECD has various flow cells available for convenience. The flow cells are 2.0” diameter by 5” long, ported
½” FNPT through and ¾” FNPT for the sensor. The flow cells are available in 316 Stainless Steel, PVC and Kynar.
Use of the flow cell can facilitate an optional spray cleaning nozzle for the electrode. Connecting 40+ psi of water
or air to the nozzle will remove particulate materials or biofilms from the sensor tip. Detergents or solvents can
be used to remove greases or oils from the sensor while acids can be used for hard water scale.
8.1.4 V ALVE R ETRACTABLE
The S80 sensor is optionally designed for valve retraction service, (-1) Sensor Style. Mounting is directly into a
process line or through a tank wall. The ball valve system allows the sensor to be removed from service without
shutting down the line or emptying the tank. ECD recommends the valve-retraction mounting for ease of
maintenance or in applications where the process line cannot be shut down and the pressure does not exceed
100 psig.
To remove the sensor from the valve assembly refer to the following directions:
CAUTION: Do not put hands or fingers between the safety lanyard cables and any part of the sensor. Use the
external cable seal/handle to pull or guide the sensor through the valve.
1. Loosen the small swage nut at the rear of the fitting assembly slowly as this compression fitting is
holding the sensor in place. CAUTION the sensor may snap back quickly if it is under pressure. (do not
remove the nut from the body of the fitting).
2. Slide the sensor to its stop by pulling it through the ball valve. The safety lanyards will be extended,
confirming that the sensor is fully retracted. Note: the safety lanyards are redundant protection; the
sensor will come to a stop when the high pressure stop reaches the front of the retainer fitting.
3. Close the ball valve.
4. Remove the handle retaining nut and the valve handle.
5. Remove the safety lanyards from the valve stem.
6. For the stainless steel ball valves, loosen and remove the large retainer nut from the retainer fitting. For
Kynar ball valves, loosen and remove the union nut on the sensor side of the ball valve.
7. Firmly pull the retainer fitting from the valve. The sensor will be removed with the fitting.
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