manufacturer hot sale silt density index sdi tester / testing kits

SPECIFICATION: φ47mm
MICRON RATING: 0.45μm
The value of pollution index (SDI Apparatus) , namely, Fouling Index (FI) value, is one of important parameter to the index of water quality. It indicate the amount of particle, colloid and other substance in water that can occlude various water purified devices. Determining the SDI value, would be instrumental in fixing upon relevant water purified technology or device. Under ASTM method 4189-95, this way is generally accepted

1:Close water ball valve (2), prevent the water entering the measure apparatus.
2:Locate and connect installation of screw (1 ) of the measure apparatus with the place examinated.
3:Open the water ball valve (2 ),let water entering, gently pull the adjusting knob (10), and adjust the pressure to 207kpa.
4:Close the water ball valve (2 ).
5:Take down the membrane filter box . (Method of fetching the membrane box: push the valve( 4 ) connecting quickly upwards, the membrane filter box comes off automatically. Notice: Hold the membrane filter box properly while dismantling ,prevent the membrane filter box from damaging while coming off. )
6:Open membrane filter box after taking down , take out membrane filter box " O " type ring ,take out a piece of 0. 45µm membrane by nipper and put it in the support board of membrane filter box underpan(7), enclose and put " O " type ring in the normal position, and then, cover oneself up with the membrane filter box top cover (6) ,twist the screw (5 ) tightly to the proper degree.
7:Insert the membrane filter box in and connect the valve (4 )connecting quickly;

8:Open ball valve (2 ) slowly and expel the air bubble secretly from the membrane filter box, close up the water ball valve (2), and then twist
screw (5) tightly and completely.
9:Open ball valve (2 ), determine the time (t1:second) while filtering 500ml water sample, and let it filter continue.
10:After 5 , 10 and 15 minutes, determine the time (t2:second) while filtering 500ml water sample (notice: During testing entirely, the pressure must be in the range of 207 +/- 7kpa).
11:Determine the temperature of water (notice: Among examining entirely, the temperature must keep within change of one degrees Centigrade range).
12:SDI value (calculational methods)

P30 — The index of stopping up under water pressure strength in 207kpa;
Tt — Total examining the time (minute) is usually T15, at this moment P30 <75%, otherwise test T10 or T5, makes P30 <75%
t1 — t1 is the necessary time (second),while collect the water sample of 500ml initially.
t2 — After T1 (usually T15), necessary time (second),while collect 500ml water sample.