Operation of Purified Water Supply Pump And Use of DM Water From Storage Tank And Cleaning of Storage Tank DM Water

1.0 PURPOSE
Purpose of this SOP is to establish and maintain the procedure for Operating DM Water supply Pump, use of DM Water and Cleaning of DM Water Storage Tank.
2.0 SCOPE
This procedure is applicable to DM Water transfer pump. DM Water storage tank and use of DM Water from storage tank.
3.0 RESPONSIBILITY
It is the responsibility of maintenance operator to follow the procedure in co-ordination with production and Q.A. / Q.C. Department.
4.0 MATERIAL AND EQUIPMENTS
DM Water, Plant, Teepol 0.1 % solution, Duster, DM Water transfer Pump, etc.
5.0 PROCEDURE
5.1 OPERATION OF DM WATER TRANSFER PUMP
a) Check the cleanliness of transfer pump, DM Water storage tank and surrounding area.
b) Check the level of water in the storage tank required for operation of pump.
c) Open the supply side valve of DM Water transfer pump and switch on the pump.
d) Check during operation pump that sufficient Qty. of DM Water is available and also DM Water tank does not over flow.
e) Continue the operation of pump as per the requirement.
f) At the end of shift or DM Water is not required.
g) Switch off the pump and close the supply valve.
5.2 USE OF DM WATER FROM DM WATER STORAGE TANK
a) Use only freshly collected DM Water.
b) Drain out the left over Qty. of DM Water from the DM Water storage tank, DM Water surge tanks and DM Water circulation loops at the end of days work.
c) Ensure that 0.2 micron vent filter is filtered with air vent.
d) Collect the DM Water from plant as per requirements.
e) Clean the tank as per Reference cleaning SCP and then only collect the DM Water.
5.3 OPERATION OF SYSTEM AFTER HOLIDAYS
Operate system as follows collect approximately 1000 lits. Of DM Water in the DM Water storage tank. Switch on the transfer pump continue circulation for 10 min. Switch off the pump after 10 min and drain the water from tank and loops collect the DM Water fresh and use.
5.4 CLEANING OF PURIFIED WATER STORAGE TANK
A) DAILY CLEANING
i) Wipe clean the outside surface, water glass of tank with wet cloth and 0.1 % teepol solution.
ii) Drain the left over Qty. of DM Water before collection of fresh DM Water.
iii) Rinse inside surface with fresh DM Water and drain the rinsed water and close the drain valve.
B) WEEKLY CLEANING
i) Drain the purified water from the loops and purified water storage tank and close the drain valve.
ii) Open the main hole and clean the inside surface of tank by scrubbing with Nylon scrubber and 0.1 % Teepol solution.
iii) Rinse the inside surface with DM Water twice and drain the water.
iv) Rinse the inside surface of the tank.
v) Close the main hole and drain valve.
5.5 PASSIVATION OF INSIDE SURFACE OF TANK
i) During quarterly passivation of DM Water loops continuously flush the inside surface of the tank with return line 10 % Nitric acid solution.
ii) During flushing take care that solution does not spill on the skin and face. Use hand gloves and safety goggles during passivation.
iii) After passivation clean the tank as per procedure given in SOP for DM Water loops.
6.0 REVIEW
After two years or when procedure is changed.