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2.2
CHECK BEFORE STARTING THE MIXING UNIT
Before starting the unit you must do a quick check of all components of the unit:
1. Check the pump:
- fluid levels
- debris plugging suction
2. Open suction valve and close drain valve
2.3
STARTING THE MIXING UNIT
First make your self acquainted with the valve schedule in 2.1
1.
To start the mixing unit, fill the tank with ¾ water
2.
Open suction valve mix pump from mix tank nr. 1
3.
Close the air bleed valve on the impeller housing of the mixing pump when all air is out of the pump
4.
Open the discharge valve from pump to venturi nr. 2
5.
Start diesel engine
6.
Now you can start mixing bentonite with the unit: open the valve of the hopper approx. half way
7.
Now suction noise will be heard out of the hopper funnel. Slowly add bentonite
8.
Add bentonite until required mud-viscosity is reached
9.
Open discharge valve to nozzles
10.
Run the unit for a few minutes: keep in mind that the viscosity of the mud will increase in this time as the mud is
being sheared
As mud is being used the fluid level inside the mixing tank must be maintained. Add water and bentonite on time and, if a
mud recycling unit is used, check the mud level of the mud pit. With a SiteTec recycling unit, mud will be transferred from
the recycling unit to the mixing unit. This means you have to add very little bentonite and/or water, keep the mud level in
the mixing tank to its maximum and in the right condition.
2.4
OPERATING THE MIXING UNIT WITHOUT RECYCLING UNIT
To maintain a continuous mixing process add water and bentonite in the correct ratio. With a minimum of 500 liter water
per minute.
2.5
OPERATING THE MIXING UNIT IN GENERAL
Before using the mixing unit always check all items of chapter 1.3 and 2.2.
Fill ¾ of the tank with water. Make sure the level reaches above the centrifugal pump. Open venturie valve and slowly the
hopper valve, make sure that all the other valves are closed. Start adding dry product at the correct ratio. When reached the
correct mixture close hopper valve.
When mixing only, open venturie valve and hopper valve, when circulating and using outlet, always close hopper valve.
For max circulation use nozzles with venturie. To charge the High Pressure pump, close venturi and hopper valves and
open nozzles valve.
If no mud is used you can close the valve of the hopper and stop the mixing pump.
This reduces wear of the unit. Do start-up before mud is needed!
Never start without deaerating the pump or without fluid.
In case of use of recycled fluid, mount stainless eductors/tank nozzles in the tank.
2.6
SERVICING ON THE MIXING UNIT AND EXCHANGING PARTS
