Water Process Solutions Encore 700 - Cleaning Pump for Sodium Chlorite Applications

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ENCORE

700 METERING PUMP

Sodium chlorite dissolves easily in water at ordinary temperatures to form

a cloudy, white solution. This solution is chemically stable under ordinary

conditions of temperature and pressure.

When received in loose flake form in metal containers, sodium chlorite

will stand considerable rough handling. In scooping or weighing out the

material, avoid contact with eyes, skin, mucous membranes, and cloth-

ing. Wash contaminated clothing quickly and thoroughly with water to

avoid fire.

The danger lies in the fact that sodium chlorite in contact with or mixed

with organic substances, such as clothing, cloth gloves, cotton waste,

sawdust, mops, brooms, etc., becomes extremely sensitive to any agent,

such as heat, friction, or impact, and these exposed organic substances

will ignite readily when any of these are applied accidentally or other-

wise. The finer the sodium chlorite is sub-divided, as is the case when

sodium chlorite solution is left to evaporate and the more intimately it is

mixed with the organic substance, the more sensitive to heat it becomes.

Although, in practice, spontaneous ignition of such mixture is unlikely, it

is theoretically possible for such a reaction to occur. Therefore, extreme

care must be used to prevent sodium chlorite flakes or sodium solution

from coming in contact with combustible material, especially fibrous or

finely divided material.

Cleaning the Pump - Sodium Chlorite Applications - Special Precautions

WARNING: SODIUM CHLORITE, WHEN FINELY DIVIDED IN THE PRES-

ENCE OF ORGANIC COMPOUNDS, IS A POSSIBLE FIRE HAZARD. FOR

THIS REASON, EXTREME CARE MUST BE EXERCISED TO PREVENT

SOLUTIONS FROM DRYING OUT IN THE THREADED PORTIONS OF THE

PUMP BODY AND RELATED PARTS. OBSERVE CAREFULLY THE MANU-

FACTURER/SUPPLIER'S RECOMMENDED SAFETY PROCEDURES AND

THE HANDLING AND STORAGE PROCEDURES IN THIS MANUAL.

Perform pump cleaning procedures in accordance with the following

steps. When procedures require pump disassembly, refer to paragraph

4.4.1 - Removing Pump From Service. Refer to Dwg. 440.400.150.010

as a guide during this procedure.

Transfer the suction line to a container of water and pump water un-

til all the sodium chlorite in the pump and discharge lines has been

replaced by water.

Place a container under the pump head, then remove the suction line.

Shut-off the discharge line valve.

Relieve the pressure and drain the discharge line between the pump

WT.440.400.001.UA.IM.1012