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CHLORINE FEEDERS

IMPORTANT DISCLAIMER

Material selections such as Viton and Hastelloy c-276 ensure that FlowVis® will provide many years of trouble-free 

operation in normally treated, sanitized pool water conditions. However, certain brands and designs of inexpensive 

chlorine feeders are known to fail and release high concentrations of chlorine or even chlorine gas into the 

surrounding filtration system. When this occurs, any equipment that comes into contact with these abnormal levels 

of chemicals will experience rapid and catastrophic damage. Inspection of any failed components will quickly and 

conclusively confirm the cause of the damage and, under these circumstances, the product’s 

warranty will be void

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Under no circumstances should FlowVis® be used as a ‘check valve’ to prevent the effects of these Chlorine Feeders 

damaging other equipment such as Heaters.

www.h2flow.net  

  Tel:  (+1) 419-841-7774  

• 

www.drydenaqua.com

Installation & Tightening Lid Screws

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TIGHTENING LID SCREWS

When removing and re-installing the FlowVis® lid assembly, it is important to adhere to the following procedure:

1.  Make sure that the o-ring on the underside of the lid is undamaged, lubricated with silicone (such as Boss 820) 

and is in-place without twists.

2.  Ensure flapper hinge pin is centered.

3.  Carefully lower the lid onto its valve body (or Tee in the case of the  DN80 

and DN100 models), making sure that the o-ring stays in place.

4.  Insert by hand the (8) stainless steel screws but do not tighten at this 

stage.

5.  Using a hand Phillips-head screwdriver, slowly tighten the screws in a 

diagonal pattern, per the sequence to the right. Do not fully tighten one 

screw before proceeding to the next, i.e., pull them down slowly multiple 

times to avoid stressing and cracking the lid. Screws should be tightened 

to a final torque of 34 Nm.

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2

3

5

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Summary of Contents for FlowVis DN100

Page 1: ...g floats or paddle wheels Combined Flow Meter and Check Valve for DN40 and DN50 65 CONCEPT As flow increases the flapper moves forward toward its fully open position The flapper s angular position is directly related to flow rate through the valve body tee A calibrated scale on the valve s lid provides a highly accurate reading of the flow rate Calibrated Scale Flow www h2flow net Tel 1 419 841 77...

Page 2: ...When selecting a physical location to install FlowVis be sure to allow accessibility to read the scale on the lid Pay particular attention to the system s direction of flow and make sure that the arrow on the lid of the FlowVis is pointing in the correct direction For the DN80 and DN100 versions the Tee will have an additional arrow on one of its bosses In the event that the FlowVis is inadvertent...

Page 3: ...hlorine Feeders damaging other equipment such as Heaters www h2flow net Tel 1 419 841 7774 www drydenaqua com Installation Tightening Lid Screws 3 TIGHTENING LID SCREWS When removing and re installing the FlowVis lid assembly it is important to adhere to the following procedure 1 Make sure that the o ring on the underside of the lid is undamaged lubricated with silicone such as Boss 820 and is in ...

Page 4: ...d near the rear of the lid 2 Indicator arm is being viewed correctly 3 Indicator arm is being viewed too far back front of the lid MAINTENANCE Although FlowVis is designed to be maintenance free periodic checks should be made to the following Condition Check for Remedy Leak around lid seal O Ring Failure Replace O Ring Leak from lid Cracks in lid Order new lid from supplier Higher flow reading tha...

Page 5: ...0 08 0 10 0 12 0 14 0 16 5 7 9 11 13 15 17 19 21 23 25 Head Loss Bar FlowRate m3 h Head Loss Bar DN50 Head Loss DN50 0 000 0 005 0 010 0 015 0 020 0 025 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 Head Loss Bar FlowRate m3 h FlowVis HeadLoss Bar DN80 Head Loss DN80 0 004 0 006 0 008 0 010 0 012 0 014 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 Head Loss Bar FlowRate m3 h FlowVis H...

Page 6: ...DN40 and DN50 65 Viton Lower Flapper DN80 and DN100 only ABS Interconnecting link DN80 and DN100 only 316 Stainless Steel Lower Retaining Pins DN80 and DN100 only 316 Stainless Steel Materials used Function Models Comments Max working pressure All models 3 5 Bar Accuracy FV C M DN40 and FV C M DN50 65 Average 97 9 98 97 5 Accuracy FV M DN80 and FV M DN100 Average 98 6 in straight pipe Min Max oper...

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