JCM 102 Extended Range Universal Clamp Coupling - Multi-Band Repair Clamp, 4 to 36 in

The JCM 102 is an extended-range universal clamp coupling: a double or multi-band repair clamp that gives a full circumferential seal over an extra-wide OD range, so six clamps fit all cast iron and asbestos cement pressure pipe from 4 through 12 in. A heavy-duty lug, larger bolts and a thicker stainless band give the safety factor large pipe repairs need, which makes it particularly suited to 10 in and larger.

Balanced, low-profile ductile iron lugs with mutually supporting sliding fingers tighten without distortion over a wide range, and the 304 stainless band, positively attached to the lugs, conforms to pipe irregularities and keeps sealing pressure over the whole gasket.

Typical application: Repair, temporary or permanent: breaks, cracks, splits, holes, corroded areas and pin holes, and connection of plain-end pipe.

Key Features

• Gridded gasket with long tapered ends and a recessed stainless bridge plate seals evenly over the full range without wrinkling or crimping
• 1/4 in thick diamond-gridded gasket fills pits and uneven pipe surfaces (JCM standard on larger sizes)
• Drop-in bolts: bolt, nut and washer stay on the clamp, so there are no loose parts in the trench
• 3/4 in bolts on 10 in and larger clamps, with bolt torque capability over 100 ft-lb, for repairs beyond the standard installation
• Meets applicable portions of ANSI/AWWA C230; certified to ANSI/NSF 61 Annex G and ANSI/NSF 372

Rated by application. JCM sets the pressure-holding capability of its universal clamp couplings for each installation rather than as one catalog figure: it depends on pipe size and type, the type and extent of the damage, line content, temperature and installation. JCM recommends the 12 in width for repairs above 150 PSI working pressure and on larger sizes. Send us the pipe OD and type, the damage, and the working and test pressures, and we will obtain JCM's rating and a submittal for your application.

From JCM material specifications. Specialty gaskets (Buna-N, EPDM and others), conductive buttons and other sizes and ranges are available on request.

Asbestos cement, cast iron, ductile iron, PVC, HDPE, steel and other pipe types. Line contents: chemical and acid lines, air and vacuum lines, cooling water, methane, potable water and wastewater, slurry and process lines (natural gas: use the JCM 121 or 151 gas repair clamps).

25 OD ranges from 4.44 to 39.20 in. Open the table for every range and width.

Bolt size: 5/8 in through 8 in nominal; 3/4 in on 10 in nominal and larger, except the 7.5 and 15 in widths, which use 5/8 in bolts. From the JCM size tables.