Apollo Valves 77FLF Посібник - Сторінка 2

Переглянути онлайн або завантажити pdf Посібник для Блок управління Apollo Valves 77FLF. Apollo Valves 77FLF 2 сторінки. Soldering lead-free forged brass ball valves

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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 ball 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 an imperial packing wrench (Apollo P/N

H371400 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. Contractors today are faced with a number of new challenges: 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

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

comparable silicon bronze alloys meaning lower costs, less gas used, and less trouble.

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 with a wet

rag (around the retainer joint) 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 that 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

2.) Apollo website:

Soldering Guide

77F and 77FLF Lead-Free Forged Brass Ball Valves

https://aalberts-ips.us/

and similar "air-swirl" technologies to solder even hotter

lead-free alloys require less heating time than

Rev. 10/26/2023