Check valve

[skyboy6142]

Dear Friends,
Would you please help me to understand reason of this installation ? "Installing a check valve beside of a ball valve" for why ?

See my photo.

Thanks.


index.jpg

[Brian_UK]

Possibly to relieve any overpressure that may occur within the section that could be valved off but still contains liquid.

[mbc]

Hi

it is check valve .
when you want to replace core inside filter you close inlet valve and outlet valve in filter.
then you pour hot water on core dryer .
all liquid comes to gas and goes back by check valve to condenser side ,so you save a lots of refrigerant liquid

[Tycho]

Hi

it is check valve .
when you want to replace core inside filter you close inlet valve and outlet valve in filter.
then you pour hot water on core dryer .
all liquid comes to gas and goes back by check valve to condenser side ,so you save a lots of refrigerant liquid

Agree with mbc.

would be useful for isolating and pumping down the filter by adding hot water, or simply as a safety against trapped liquid.

On our ammonia plants we use 1 bar safety/check valves on all parts where you may get trapped liquid when you close it for service.

[skyboy6142]

Hi

it is check valve .
when you want to replace core inside filter you close inlet valve and outlet valve in filter.
then you pour hot water on core dryer .
all liquid comes to gas and goes back by check valve to condenser side ,so you save a lots of refrigerant liquid

Thanks my friend.

[skyboy6142]

Agree with mbc.

would be useful for isolating and pumping down the filter by adding hot water, or simply as a safety against trapped liquid.

On our ammonia plants we use 1 bar safety/check valves on all parts where you may get trapped liquid when you close it for service.

Thanks a lot.

[tigur16]

Hi bro, When you want to replace core inside filter you close inlet valve and outlet valve in filter. then you pour hot water on core dryer . all liquid comes to gas and goes back by check valve to condenser side ,so you save a lots of refrigerant liquid.
Regards
Tigur 16