We often get questions about what is needed to properly install a butterfly valve in line. Here we'll go over everything you need and show you where to find it on pvcfittingsonline.com
Besides your surrounding pipe line this is what you'll need for installation:
Stud Kit including nuts and washers
Torque Wrench
Combination Wrench
The mistake many buyers make is forgetting the two flanges required for each valve you're installing. Even wafer style valves require 2 flanges. These should be the same size as your valve and may be one piece or loose ring style flanges. This will allow the surrounding pipe line to connect snugly with the butterfly valve.
Most butterfly valves do not require extra gaskets. All the butterfly valves available on pvcfittingsonline.com for example have built in seals that sit against your flanges and prevent leakage.
Depending on the size of your butterfly valve, and flanges (which should both be the same size) - you may need a stud kit with 4, 8, or 12 studs. PVC Fittings Online makes this easy by naming our kits by the same size as the valve and flange. That means to install a 4" valve you will need (2) 4" flanges, and (1) 4" stud kit. Our stud packs come in stainless steel and zinc coated options.
Use the torque and combination wrenches in conjunction to properly install and tighten the nuts. Refer to the flange installation instructions provided by the manufacturers for tightening patterns. Yes, there is a special way to properly tighten flange fasteners! Remember, the valve should be sandwiched in as follows: flange, valve, flange.
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