Chatleff Piston Sizing 1

[microhydro]

I've been waiting on the Danfoss applications engineers for a week and a half to obtain a piston sizing chart for Chatleff pistons. I don't know why they don't just post it on their web site like Sporlan does.

Does anyone have a Chatleff piston sizing chart?

 

[Drazen]

Don't know anything about Chatleff piston, but have exactly the same experience with Danfoss engineers - one week of waiting for answer to simple question, no response.

I remember that happened once before, that time I wrote directly to their technical headquarters in Danmark, and received response in one day, I will probably do the same again.

 

[microhydro]

This did not turn out well. Danfoss has terrible engineering support. After this long delay, on my 4th phone call I was told that piston sizing is proprietary information, and maybe sales could help me. I started with sales. Next time I'll use Sporlan.

So now I have a problem. I need to select a Chatleff piston for a Chatleff distributor on a 3.4 ton R22 system. The helpful Sporlan engineer indicated a nozzle size 1 1/2 for this application. The Sporlan nozzle length is about 1/4" and the hole is .120" in diameter. Chatleff pistons are quite a bit different. The nozzle length is .480". There are only three sizes at the upper end of the Chatleff line with similar diameters:
Piston # Diameter
120 .120"
125 .125"
128 .128"

I would guess that the longer Chatleff nozzle length would require a larger diameter for the same flow as the Sporlan nozzle.

Does anyone have a recommendation what to choose?

 

[Drazen]

well, i had problems with some issues that are undoubtedly their core business.

however, if you come into issue with proprietary information, that is another story.

that is kind of problems i was facing with when i was working in maintenance department. you assumable have problem with nozzles and want to save money by avoiding to replace the whole assembly. if manufacturer does not accept such approach, you cannot achieve what you want without having enough knowledge on the matter to allow you to engineer whole distributor yourself, eventually calculate nozzle. that is large responsibility that should be taken only if you have master knowledge on the issue. many people don't know that most of manufacturer's service engineers have large service books that are much more comprehensive than maintenance manuals they deliver to their customers. they hold such books as proprietary information, and you are actually confronting patent legislation if you try to obtain it other way.

the only "straightforward" way is saying "i am taking full responsibility for assembly from now on" you can still buy from manufacturers all parts they are willing to sell, but they will not provide technical support any more. During my time in maintenance, i took such course in few occasions, but only few ones.