Smith-Blair · Restrained Flanged Coupling Adapter
Style 911 Flange-Lock Restrained FCA for Ductile Iron and Steel Pipe
Fabricated Steel FCA with Integral Cam-Lock Restraint, Flange x MJ
150 PSI Max Working Pressure
-20°F to +180°F Temperature
SBR MJ Gasket
Epoxy-Coated Carbon Steel Sleeve
Cam-Lock Ductile Iron Gland
NSF/ANSI 61 and 372
AWWA C207 Class D Flange
Restrained Joint, 5° Max Deflection
3.96-50.80 in Pipe OD
25-1272 lb Weight
Description
The Smith-Blair Style 911 Flange-Lock is a restrained flanged coupling adapter (restrained FCA) that connects and restrains plain-end ductile iron or carbon steel pipe to flanged fittings, valves, meters and other flanged equipment. The fabricated steel flange adapter has an AWWA C207 Class D flange on one end and an MJ end on the other. The restraint is built into the follower gland: a Cam-Lock gland with multiple single-tooth wedges grips the pipe while a standard MJ gasket seals it.
The flange size equals the nominal size: a 6 in adapter has a 6 in flange. The listed part numbers are sized to ductile iron pipe ODs, 3 to 48 in. Choose the nominal size and OD in the first option; the part number follows.
Application: connecting and restraining plain-end ductile iron pipe (3 to 48 in) or carbon steel pipe (3 to 12 in) to flanged fittings, valves, meters and equipment.
Key Features
- Working pressure 150 PSI with the standard Class D flange; up to 300 PSI with 300 lb flanges, built to order
- Joins and restrains in one unit: Cam-Lock restraint integral to the follower gland, with multiple single-tooth wedges
- Breakaway nuts twist off once the wedges are set, leaving the restraint engaged with the pipe
- Pipe passes completely through the adapter body for easier installation (not with raised-face flanges)
- Certified to NSF/ANSI 61 and NSF/ANSI 372; meets applicable portions of AWWA C219
What Ships and What It Needs to Run
Included: the epoxy-coated adapter body (carbon steel sleeve with Class D end flange and MJ flange), the Cam-Lock restraint gland with black wedges and breakaway nuts, an SBR MJ gasket, and the T-bolts and nuts for the MJ end.
Flange gasket and flange bolts, ordered separately. The Smith-Blair kit covers the MJ end (MJ gasket and T-bolts); the gasket and bolts for the flange joint are sized to your companion flange. Ask us to quote them with the adapter.
Genuine Smith-Blair equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
12-Month Smith-Blair Warranty
Smith-Blair warrants its products to be free of defects in materials and workmanship for one year from the date of shipment by Smith-Blair. Dated proof of purchase, such as a bill of sale, is required to establish eligibility. Smith-Blair will repair or, at its option, replace a defective product; the product is returned to the factory or warehouse Smith-Blair designates.
Working Pressure
150 PSI with the standard AWWA C207 Class D flange, the build listed here. With 300 lb flanges, built to order, the rating is set by pipe material and size as below; for any installation, allowable pressure also depends on the pipe, service conditions and workmanship.
| Pipe and size |
Class D flange (listed) |
300 lb flange (built to order) |
| Ductile iron, 3 to 16 in |
150 PSI |
300 PSI |
| Ductile iron, 18 to 48 in |
150 PSI |
250 PSI |
| Carbon steel, 3 to 12 in |
150 PSI |
250 PSI |
The pass-through feature may not be available with some flanges.
Materials Specifications
| Sleeve |
Carbon steel: ASTM A513 or A53 on 3-4 in, ASTM A283 Gr C on 6 in and up; 30,000 PSI minimum yield |
| End flange |
Carbon steel ASTM A36 ring flange, AWWA C207 Class D, flat face, ANSI 150 lb drilling (fits ANSI 125 and 150 lb bolt patterns) |
| MJ flange |
Carbon steel, ASTM A36 |
| Body finish |
Flexi-Coat fusion-bonded epoxy per AWWA C213 |
| Restraint gland |
Cam-Lock, ductile iron 65-45-12 (ASTM A536), Flexi-Coat fusion-bonded epoxy per AWWA C213 |
| Wedges |
Single-tooth ductile iron, heat treated for ductile iron pipe; E-coated epoxy, color-coded black |
| Actuating bolts |
Ductile iron 60-40-18 (ASTM A536), E-coated epoxy |
| Breakaway nuts |
Carbon steel or cast iron |
| Gasket |
SBR per ASTM D2000, standard mechanical joint gasket per AWWA C111/A21.11; -20°F to +180°F |
| T-bolts and nuts |
High-strength low-alloy steel per AWWA C111/A21.11, 3/4-10 UNC rolled threads; heavy hex semi-finished nuts |
Materials subject to change by the manufacturer.
Pipe Applications
Ductile iron pipe to AWWA C151, 3 to 48 in, and Schedule 20, 40 and 80 carbon steel pipe, 3 to 12 in. The black wedges are for ductile iron and steel; for PVC pipe, use the Style 920. Not for use on plain-end fittings.
Sizes
15 sizes from 3.96 to 50.80 in OD — open for the full list
| Pipe size and OD |
|---|
| 3 in - 3.96 in OD |
| 4 in - 4.80 in OD |
| 6 in - 6.90 in OD |
| 8 in - 9.05 in OD |
| 10 in - 11.10 in OD |
| 12 in - 13.20 in OD |
| 14 in - 15.30 in OD |
| 16 in - 17.40 in OD |
| 18 in - 19.50 in OD |
| 20 in - 21.60 in OD |
| 24 in - 25.80 in OD |
| 30 in - 32.00 in OD |
| 36 in - 38.30 in OD |
| 42 in - 44.50 in OD |
| 48 in - 50.80 in OD |
Choose the size in the first option; the part number shows in the last option.
Max Joint Deflection
| Nominal size |
Per gland |
| 3 in |
3° |
| 4 to 12 in |
5° |
| 14 and 16 in |
2° |
| 18 and 20 in |
1.5° |
| 24 in and up |
1° |
Per gland, reached at minimum pipe insertion. Make any deflection after the joint is assembled and before the T-bolts are tightened. Where Smith-Blair documents differ, the lower figure is shown.
Installation Notes
- Bolt the adapter body to the companion flange first.
- Wedges can shift in transit: before sliding the gland on, hand-tighten the torque-off nuts counterclockwise until the wedges seat firmly against the gland.
- Clean, inspect and lubricate the pipe end, MJ socket and gasket. Put the gland on the pipe with its lip toward the plain end, then the gasket with its taper toward the plain end.
- Insert the pipe at least 3 in past the MJ flange face and keep the joint straight. Make any deflection now, then tighten the AWWA C111 T-bolts evenly in an alternating pattern to the torque in the instructions.
- Set the wedges: hand-tighten the torque-off nuts clockwise until every wedge touches the pipe, then turn each 1/2 turn in an alternating pattern until all twist off. Do not remove the retaining washer under the torque-off nut.
- Use black wedges on ductile iron and carbon steel pipe only, never red PVC wedges. Not for use on plain-end fittings. For removal and re-assembly, use the 5/8 in hex left after the nuts twist off.
From Smith-Blair Installation Instructions TI-072 (Rev 9/30/21), in the Data Sheet tab.
Before You OrderAll Smith-Blair products are Made to Order and Non-Returnable.
Items typically shipped in 5 - 10 business days.
300 lb and other flanges, carbon steel pipe (IPS OD) builds, Multi-Seal gaskets (4-12 in), 304 or 316 stainless hardware, other gasket materials, longer adapters and reducing styles are built to order — email sales@watermainsupply.com with the pipe OD, pipe material and flange.
