SHURJOINT Grooved Couplings Instruction Manual

SHURJOINT Grooved Couplings Instruction Manual

Please read these instructions carefully before installation, assembly or use of any product and keep this manual on hand for future use and reference.

GROOVED COUPLINGS

Gasket Installation – Preliminary Steps

1. INSPECT PIPE ENDS: For optimum sealing by the gasket, the exterior surface of the pipe ends must be free from any indentations, projections, roll marks or other harmful surface defects such as loose paint, scale, dirt, chips, grease and rust.
   

2. CHECK GASKET: Verify the gasket supplied is correct for the intended service. Color code identifies gasket grade.
   ☞ Refer to page 36 for additional information on gaskets.
   

3. LUBRICATE GASKET: To help insert pipe smoothly and mount couplings smoothly without pinching, apply a thin layer of Shurjoint Lubricant to the sealing lips of the gasket and as well as to the exterior of the gasket. Other compatible lubricants may be used so long as they are not harmful to the gasket. System temperature should also be considered when selecting a lubricant. See page 38 for details.
   
   Note: Lube-E gasket: Normally no lubricant is required when using a Lube-E gasket.

4. INSTALL GASKET: Install the gasket over one end of the pipe so that the pipe end is exposed. No part of the gasket should overhang this end of the pipe.
   

5. BRING THE MATING PIPE TOGETHER: Bring together and align the two pipe ends to be joined. Slide the gasket over the ends and center it between the grooves of the pipe to bejoined. No part of the gasket should protrude into the groove of either pipe.
   

Models K-9, K-9H & 7771 Rigid Couplings

Model 7771-T* Transition Coupling

Please read these instructions carefully before installation.

1. Refer to page 50 for preliminary steps 1,2,3,4 & 5.
   

2. ASSEMBLE COUPLING: For a “swing-over” assembly loosely install one bolt and nut on one side of the coupling. For a standard assembly start with the two housings separated.
   

3. INSTALL COUPLING HALVES: For a “swingover” installation, place one of the coupling halves around the bottom side of the gasket and swing over the other coupling half into position over the top side of the gasket. In tight areas where a swing-over is not possible, install the coupling halves one at a time. In both cases make sure the coupling keys are engaged in the grooves.
   
   WARNING
   The Shurjoint Models K-9, K-9H, 7771 & 7771-T couplings feature a tongue and groove design and mechanism. Thus the couplings must always be installed so that tongue and groove mate properly. Attempting to install these couplings tongue to tongue or groove to groove will result in joint failure, property damage or serious injury.
   

4. INSERT BOLT & NUT: Insert the remaining bolt and apply the nuts hand tight. Make sure that the oval neck of the bolt engages into the bolt hole of the housing.
   

5. TIGHTEN NUTS (For 1¼” to 12” Models K9 and 7771 Couplings): Tighten nuts alternately and equally until the bolt pads meet and make metal-to-metal contact. Tighten nuts by another one quarter to one half turn to make sure the bolts and nuts are snug and secure. The use of a torque wrench is not required.

6. LARGE DIAMETER COUPLING: Large diameter couplings over 14” consist of three to four housing segments. To prepare installation, preassemble the segments loosely into two or three equal assemblies depending on sizes.
   Install those assemblies over the gasket in the same manner as described above.
   

7. TIGHTEN NUTS (For 14” to 24” Model 7771 Couplings): Tighten nuts alternately and equally using a torque wrench until the required torque value is achieved. Full metal-to-metal contact is not always required but bolt pad gaps, if any, shall be equal on both sides.
   

If the bolt pad gaps are greater than ⅛” (3.2 mm) at any, or each of the bolt pads, disassemble and reinstall the coupling after checking the following.

• The coupling, pipe and/or fitting being connected are the correct size.
• The coupling keys are fully engaged in the pipe and/or component grooves.
• The gasket is not being pinched.
• The grooves conform to the applicable groove dimension specifications.
• The pipe end flare is within the specification tolerance.

CAUTION

1. Uneven tightening of bolts and nuts may cause the gasket to be pinched, resulting in an immediate or delayed leak.
2. Never exceed torque stated in the table. Excessive tightening of nuts may cause a bolt or joint failure.

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