How to modify a Saw-cut Loop for Direct Burial use

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BD Loops Saw-Cut loops are not designed to take the crushing pressure of direct burial applications. When a saw-cut loop is used in a direct burial application the yoke (black area where the loop meets the lead-in) may become crushed and damage the water tight seal. If you want to install a saw-cut loop in a direct burial application we recommend that you protect the area of the yoke using this modification.  This modification can be time consuming, it is often better to purchase the correct BD Loops direct burial loops that you need. This modification can only be preformed before the loop is installed. If you need to repair a loop you have previously installed follow the How to Repair a Crushed Saw-Cut Loop Yoke  instructions that can be downloaded at: http://www.bdloops.com/repaircrushedyoke.pdf                                               

You will need:

  • A 10” long piece of 1” PVC conduit (Schedule 40 or 80)
  • Plumbers Putty or electrical tape
  • A quick curing 2-part polyurethane sealant such as Chemque’s Q-Seal 295M.
  • Applicator Gun for the sealant.

 

Step 1:
Take the PVC conduit and pull it over the lead-in so that it is fully covering the yoke. (The black area where the loop meets the lead-in.)
Try to center the yoke in the conduit.

Step 2:
Use the plumber’s putty or the electrical tape and cap one side of the PVC pipe. We will be pouring loop sealant into the PVC conduit so try and create a seal that will not leak.

Step 3:
After one end of the pipe has been capped fill the pvc pipe with the loop sealant. Then prop up the PVC pipe so that it can cure. Check the putty seal after propping up the PVC pipe to make sure the potting mix will not leak out. Moving the PVC pipe may disrupt the seal.

Cure time for 2 part polyurethane sealants tend to range from 15minutes to an hour.

Step 4:
After the sealant has cured the loop is ready to install. Follow BD Loops Direct Burial Loop Installation Instructions when installing this loop. (You can download the direct burial installation instructions from our website: BDLoops.com

You might want to add a 1” to 1/2” reducer coupler that will allow you to run the lead-in through 1/2” PVC  conduit from the yoke to the operator.

This modification is required to protect the yoke-area of a saw-cut loop in a
direct burial application
. To demonstrate the effectiveness of this modification  we tested a sample in water for over 24 hours.

BD Loops’ Direct Burial Loops are built with the yoke encased inside of durable PVC that can withstand crushing pressures.

BD Loops is a manufacturer of preformed direct burial and saw-cut inductance loops for the gate, door, and parking industries. With over 14 years in business the quality of BD Loops is unparalleled. BD Loops products are available through over 400 distributors in the U.S. and Canada. BD Loops offers 46 standard preformed loop sizes, all standard and custom loop sizes are ready to be shipped the same day. The company has several letters of recommendation testifying their professionalism and design, and is a member of the following associations: AFA, IDA, NAFCA, NOMMA, IPI, CODA, and IMSA. Feel free to call BD Loop's knowledgeable staff with any questions about loops or their applications. By visiting the BD Loops website (www.BDLoops.com) you are sure to learn something new whether if you are new to installing loops or a veteran installer. While you are at the BDLoops.com website sign up for our free informative monthly installer newsletter.Use our distributor locator to find a distributor near you.