Non-return valves for dosing pump

[dfinn]

Hi everyone,

I am just wondering what non-return/ check valves I need to buy for a Jebao DP3 pump? Do normal air line check valves used for air pumps work or are there different ones of liquids? Also do I just need one per line or do I need two, one before and one after the pump?

Thanks,

Dan

 

[ian_m]

One after the pump only needed if peristaltic pump is two roller. Sometimes recommended for three roller pumps but many people with three roller have no back flow issues.

 

[dfinn]

Right I have the non-return valves installed but I think they are a bit cheap and nasty and are leaking a bit meaning I am getting back flow. Does anyone know of a good non-return valve for use on an auto dose that won't leak?

Dan

 

[aaron.c]

I have had this problem with a lot of non return valves I have tried. Very frustrating


Let me know if you find a good one


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[dfinn]

Aaron I've found that my problem was actually with the airline I was using. I changed CO2 pipe and it seems to have improved.

Dan

 

[ian_m]

Use pvc tubing with dosing pumps, air line is completely unsuitable. Remember to clamp with a cable tie all joints.

 

[aaron.c]

That may be my problem then. Will order some co2 pipe


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[forever]

Use pvc tubing with dosing pumps, air line is completely unsuitable. Remember to clamp with a cable tie all joints.

Airline in most cases is PVC?

 

[dfinn]

CO2 PVC pipe has a thicker wall and narrower bore so it must get a better seal with connectors?

 

[ian_m]

Airline in most cases is PVC?

Most is silicone based or thin walked pvc.