Siemens PolyBlend PB200-2, Manual

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PB200-2 

OPERATION 

 
GENERAL  
 
This PolyBlend unit will perform the following 
functions: meter polymer dosage, regulate mixing 
water, provide uniform dilution and activation, operate 
on-line continuously, and feed solution to the point of 
use. 
 
Neat polymer from the metering pump and dilution 
water controlled by the solenoid valve enter the mixing 
chamber. Dilution and activation occur, yielding 
prepared solution ready for use. 
 
Neat polymer dosage rate is adjusted at pump face or at 
electronic controller (REM-1E, SCR, etc.). Primary 
dilution (and post dilution) water are controlled by 
individual flow control valves. 
 
 
START-UP 
 
Step 1:  Switch pump to external mode at pump face. 
Step 

2: Prime polymer pump, using priming kit 

provided with unit. 

Step 3:  Place unit power switch in Off position. 
Step 

4: 

Energize power circuit that feeds unit. 
Solenoid opens.  Allow mixing chamber to fill 
with water by opening primary dilution water 
control valve. 

NOTE:  Do not turn mixer motor on until 
chamber is filled with water, running dry will 
damage mechanical seal.  

 
Step 5:  Place unit power switch in On position.  

Mixing chamber motor starts. 

Step 

6: Access REM-1E controller to turn pump 

On/Off and for polymer output adjustment.  
Output can also be adjusted at pump face by 
varying the stroke length. 

NOTE: For optimum pump performance, 
keep stroke frequency as high as possible. 
This is done by decreasing the stroke length 
setting. More stroke repetition with a shorter 
length is better than fewer strokes with a long 
stroke length. If stroke length is too short, 
pump prime may be affected. 

Step 

7: Adjust water flow at mixing chamber by 

turning control valve. (The other control valve 
should be turned for post-dilution adjustment, 
if applicable.) 

NOTE: Do not run polymer pump unless 
water flow is established. Polymer alone can 
plug discharge plumbing.  

 
 
WATER PRESSURE 
 
This unit is equipped with a differential pressure switch. 
 It has been factory set. See Appendix for details. 
 
 
SOLUTION OUTPUT  
 
Unit output is determined by setting pump stroke 
length and stroke frequency together with setting 
dilution water flow. Establish desired solution volume 
and solution concentration, then proceed. 
 
EXAMPLE:  100 GPH (380 LPH) of .5% polymer 

solution desired. A 2 GPH (7.6 LPH) 
diaphragm pump is used. 

 
— Determine neat polymer requirement. 
 
(100 GPH) x (.005) = 0.5 GPH neat polymer 
(380 LPH)) x (.005) = 1.9 LPH neat polymer 
 
— Determine pump usage. 
 
(0.5 GPH) 

÷

 (2 GPH) = 25% pump capacity 

(1.9 LPH) 

÷

 (7.6 LPH) = 25% pump capacity 

 
— Set Controls 
 
A 2 GPH (7.6 LPH) pump @ 100% stroke length and 
25 strokes per minute will deliver 0.5 GPH (1.9 LPH). 
However, 2 GPH (7.6 LPH) pump @ 50% stroke 
length and 50 strokes per minute will also deliver 0.5 
GPH (1.9 LPH) with a more homogeneous mix. 
 

NOTE: Do not exceed polymer 
concentrations of 1% in the PolyBlend.