JCM Industrial Installation Instructions Manual.pdf

Installation Instructions Model 474 Mechanical Joint Tapping Sleeve Failure to follow installation instructions will result in voided product warranty

Read instructions before starting installation* Review of Drawings on the reverse will assist with installation. For purposes other than water, contact JCM Industries for application and product assistance.

1. Clean and scrape pipe. Remove any scale, pipe wrap, debris or dirt that may interfere with the complete sealing of the gasket. Inspect pipe for integrity, size, outside diameter and surface irregularities. Confirm the proper size and range of tapping sleeve. Inspect fitting to ensure all parts are included. Lubricate the pipe and the fitting gasket with soapy water. Do not use oil base pipe lubricant. 2. Check to be sure that the square side gaskets are properly seated in side bar grooves. Side gaskets will protrude from side bar ends about 1 inch (1”). Do not cut the gaskets at this point. 3. (Drawing - A) See reverse side for drawings. Install sleeve in proper position on pipe and match color marks on body. Color marks on pusher flange should face outward from sleeve. Do not rotate fitting on pipe. Install longest “corner” bolts loosely to align sleeve halves. Install side bolts. For sleeve sizes provided with two bolt lengths, longer bolts are to be installed on the MJ ends. 4. Tighten side bar bolts first, starting in the center and working toward the ends. Next, tighten the end bolts so that the sleeve halves are butted together evenly and squarely. Note: At this point, the square side gaskets should protrude into the area where the end gasket will seat. Cut the gasket such that it protrudes 1/8” to 3/16” into the area where the end gasket will seat, as shown in Drawing D. All bolts should be @ 90 Ft/Lbs. torque minimum (Stainless Steel Hardware may require molybdenum-base antiseize lubricant) 5. Block under sleeve to center it on pipe . (Drawing - B) Install end gaskets, placing lap 45 o (1/8 turn) from side bars. Side bar gaskets will now protrude approximately 1/8” to 3/16” length from the side bar joint. NOTE 1: Sleeves are furnished with long end gaskets. To cut them to length, place the gaskets around the pipe and cut one end on the bias so that the gasket fits snugly around the pipe and the bias cut ends match. (Drawing - B)


The end gaskets were lubricated before shipment. If necessary to apply additional lubricant, use a standard gasket soap lubricant as used in rubber joint pipe installations. JCM provides the gasket thickness calculated for the fitting/application. JCM can provide different thicknesses of MJ end gaskets should the gaskets provided not complete the water tight installation. For gasket information, contact JCM Technical Sales. If two sets of MJ end gasket have been included with your fitting , notice they are different thicknesses. During the product ordering process it was determined that unknown pipe irregularities may require a different thickness of gasket to provide the best fit. For gasket information, contact JCM Technical Sales.



6. ( (Drawing - C) Pusher glands have color match marks indicating the proper end and location of each segment of the pusher gland. Install glands so that the color match marks are to the outside. On the pusher gland, install the longer lip of the ring towards the MJ gasket. Install pusher gland so that joints are 90 o (1/4 turn) from side bars. Install pusher gland so color match marks line up. Tighten bolts evenly to approximately 90 ft. lbs. (more if required). Install tapping valve with proper support and trenching. Improper support can result in undo stress. NOTE: Pusher glands must be positioned and matched to the markings provided for proper installation. For proper gasket and pusher gland positioning, see drawing on reverse. No “joints” (gasket, body, pusher gland) should be in line with each other. 7. Test assembly seals with appropriate medium using test port provided on sleeve or test connection on tapping machine. For pneumatic tests, proper safety provisions must be used. When testing the assembly against the pipe to pressures greater than the internal pressure of the host pipe, application should be treated with caution to prevent imploding or damaging the pipe wall due to thin wall, flexible or brittle conditions. Inspection and verification of the pipe integrity is the responsibility of the end user. For inquires, contact JCM Industries, Inc.

8. When assured that all seals are tight and test is completed, re-check bolt torques after 15 minutes and proceed with the tapping operation.

Note: Size on size tapping cutter must not be larger than recommended by pipe manufacturer. Tapping operation must not force the pipe away from the gasket seal. Ensure fitting is suitable for application (confirm size, materials, pressure ratings, line content, meets local governing & association standards, etc.). Pipeline operation forces, including pressure fluctuations, thermal expansion/contraction, movement/shifting, etc. will influence the success of the application. Proper anchorage, restraint, harnessing, thrust blocks or other devices must be provided to prevent pipe movement (lateral, angular, axial) or pipe pullout from the bolt-on fitting. Inspection of the pipe integrity is the responsibility of the end user. JCM recommends the use of calibrated torque wrench. Failure to follow installation instructions will result in voided product warranty.

INT474-0218 INT474-0218

For application review or questions contact JCM Industries at 1-800-527-8482, 903-832-2581

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