Apollo Valves 94ALF-A Посібник - Сторінка 2

Переглянути онлайн або завантажити pdf Посібник для Блок управління Apollo Valves 94ALF-A. Apollo Valves 94ALF-A 2 сторінки. Lead free forged brass ball valves

Друкувати сторінку

6. Solder selection is another variable. Soft solders with melting temperatures below 500°F must

be used. Many high strength lead free solders are now available with melting temperatures in

the range of 410° – 420°F. (Example Sterling Premium Lead Free, 410°F melting temperature

and 7,130 psi tensile strength). Selecting lower temperature solders can help to further reduce

the amount of heat introduced into the valve.

7. Apollo International Valves may be soldered with the ball either in the fully open or fully closed

position, however fully open is preferable to maximize the heat sink effect while protecting the

seats.

8. It is possible that the heat from soldering can affect the packing material resulting in a stem

packing leak. Follow the steps above to limit the amount heat applied to the center section of

the valve. If a packing leak is encountered, use a metric packing wrench (Apollo P/N H380700

or equal) to tighten the stem packing hex nut (clockwise) one-half (½) flat at a time to restore

packing integrity. Many contractors make it a standard practice to tighten the packing gland of

every solder valve after soldering to preclude the possibility of leaks / callbacks.

9. Installers today are faced with a number of new challenges when soldering: a.) a variety of lead

free alloys that can have very different soldering properties; b.) the use of new lead-free solders

and fluxes; c.) a trend away from propane and MAPP gas to the much hotter acetylene

soldering gas, and d.) the use of Turbo Torch

even hotter and faster. For these reasons, Apollo forged brass ball valves have been

specifically engineered to resist heating damage while providing the installer with a simple,

quick and consistent soldering experience. EZ-Solder

time than comparable silicon-brass alloys meaning lower costs, less gas and less trouble. All

94A / 94ALF ½" through 2" solder valves feature a supplementary stem seal o-ring for

enhanced stem sealing.

10. Our customers experience very few problems with solder valves. When problems are

encountered, always review the points above to minimize the effects that heat can play during

the soldering process. In some cases, it may be necessary to wrap the valve body / retainer

joint with a wet rag to protect against heat migration beyond the solder cup.

11. If problems are still encountered, a small representative sample of valves should be returned

to the factory via RGA for evaluation. Valves should be cut from the line with an inch or more

of tube intact on each side so we can properly test and evaluate. Note that valves that have

been de-soldered cannot be evaluated since we can't tell if the heat of installation or removal

affected the body joint, seats or packing. Providing details of the solder, flux, gas, torch tip size,

test pressure/media and duration will help us prepare a detailed evaluation.

Thank You for choosing Apollo Valves.

Additional Resources:

1.) Copper Development Association Recommended Practice for Soldering of No-Lead

Copper Alloys:

https://www.copper.org/publications/pub_list/pdf/A4108-NoLeadSoldering.pdf

Apollo website:

94A and 94ALF-A Lead Free Forged Brass Ball Valves

www.aalberts-ips.us

Soldering Guide

and similar "air-swirl" technologies to solder

lead-free alloys require less heating

Rev. 10/26/2023