Spring Loaded Ball Valve

I don't know your exact situation, but here is an example from my field:

In ammonia refrigeration systems, various vessels can collect oil that circulates within the system. This oil must be drained from time to time. Once all the oil has been drained out, it will be followed by ammonia. This can either startle the operator or make the nearby atmosphere unbreatheable. If the operator were to step away from the process, there could be a large ammonia leak. By having a spring-closing ball valve, the valve will close itself if the operator is distracted or panicked. This minimizes any possible leak.

This would be similar for toxic, polluting, or highly valuable fluids where accidental releases need to be limited.

The real deal is that the valve closes by it self. Check it out http://www.freepatentsonline.com/4938453.pdf

The patented device is more aptly described as a ball-check valve, with "check" (one-way) being the main idea. This valve doesn't seem to be closely related to separators, and it isn't really an isolation valve.

I'm not positive, but I think the OP is interested in a manual ball valve, sometimes called a "dead-man" valve, that closes automatically by a spring if the operator lets go of it. This can be done by a torsion spring or by a coil spring pushing/pulling in a lever.

Refrigeration valve manufacturers such as Hansen Technologies, and conventional ball valve manufactures like Apollo, offer these.

Spring loaded ball valve is a type of check valves for "quick-on, quick-off" control feature for controlling the flow of fluid therethrough.

The ball valve includes a housing having a longitudinal conduit extending completely therethrough along its longitudinal axis for allowing fluid to flow therethrough. A ball headed member is positioned within the longitudinal conduit and includes an aperture extending completely through the ball headed member for controlling the flow of fluid through the longitudinal conduit. A stem portion is connected to the ball headed member and is coupled to a handle member for moving the ball headed member between an open position wherein the ball headed member aperture is generally aligned with the longitudinal conduit for allowing fluid to flow therethrough and a closed position wherein the ball headed member aperture is not aligned with the longitudinal conduit for preventing fluid from flowing therethrough. The handle member extends outwardly from the stem portion toward a first lateral side of the longitudinal conduit. A stop member is positioned on the first lateral side of the housing. An elongated mounting member is positioned on the second lateral side of the housing. The mounting member secures a biasing member to the housing such that it engages the stop member and the elongated handle for biasing the elongated handle towards the closed position.

..........................................

Abdel Halim Galala

Excuse me but it looks as if you pasted details from a common ball valve and not the topic (spring loaded ball valve).

I hope I am wrong and please correct me.

However it looks like indeed you did post the image of a spring loaded ball valve.

I do have a question about the working pressure.

Is the image you posted of the spring ball valve operated by a max pressure coming in from the left?

If so can I assume that you can adjust the force on the spring to change the discharge pressure?

Thanks

Dear rethinker,

Sorry for that mistake due to linking between the image and text.

• The text was extracted from that site: Spring-loaded ball valve for controlling the flow of fluid.

• Also, the following link was found at "Google" where I extracted the image under the same title "Images of Spring-loaded Ball Valve": http://www.google.com/search?sourceid=navclient&aq=hts&oq=&ie=UTF-8&q=Spring+loaded+ball+valve#q=Spring+loaded+ball+valve&hl=en&prmd=ivns&ei=Fpc5TY3TNIqX8QOstP3kCA&start=10&sa=N&fp=1&cad=b

.................................

A spring loaded ball valve functions as a spring loaded check valve. Internally it looks like a ball valve with no stem and no associated handle. A spring, usually helical, forces the ball against the seat on one end. There is enough room for the ball to slide away from the seat, compress the spring and allow material to flow through the valve. Conversely, since the spring holds the valve closed under normal conditions no flow is allowed in the opposite direction, flow from the spring end.

They are often used on air discharge piping from compressors to the sir storage tanks and also from the storage tanks to the distribution piping. By using them between the compressor and the tank it allows for the compressor to start under a no load condition. The valve after the tank is this type to reduce the chatter of a check valve (beats itself to death) caused by the pulsations of the compressor if it is a reciprocal type.

They can also be used in some positions that a regular swing check valve couldn't be used because of gravity.

Ball check valves are a ball that rests on a seat and has room to move up to permit flow through the valve. A spring loaded check valve is the same but with a spring to hold the ball against the seat when the spring is not compressed by flow. provide enough pressure to counteract the spring force and there is flow in one direction only.

If you are familiar with swing check valves, essentially a flapper resting against a seat, this is the same but with a ball resting against the seat and a spring assisting it to rest against the seat.

Good Luck, Old salt

Depending on the media, flow, connection size and thread type you may be interested in Appolo Valves. Namely a 76-500 ball valve with a spring loaded handle.

That's exactly what we use on ammonia vessel oil drains. Thanks for the picture.

zxdavies

thanks for that, I did not know that this type of ball valve was available.

I think your posted image of a spring loaded valve is more like a spring loaded handle control.

In the spring loaded ball valve of the topic, I think the pressure of the valve controls the spring both ways (on and off) and in the image you posted, the spring has to have human intervention to make a change.

Is this correct?

Thank you

Yes the handle contains the sping itself. The handle is an addition to the standard valve they do and so yes the handle has to be operated by hand to either open or close the valve (depending how you set it up) then when released it springs back to position.

I do have a data sheet for the valve but not quite sure of the best way to send it.

Thanks for all of your valuable informations. Please send the datasheet

Regards,

K.Uthayasankar.