The SUMNER manual flange spreader is a durable, compact tool designed for precision and strength in most pipe fitting applications.
It accommodates flange sizes ranging from 1″ to 24″ (25 – 610 mm) and is suitable for pressure ratings from 150 – 1,500 lbs (68 – 680 kg).
Built for versatility, it features a hardened wedge for safe and effective flange separation, along with a large feed screw that offers smooth and controlled spreading action.
The drive system is designed for user convenience and can be operated using either a 1½” wrench or a ½” (12 mm) bar, allowing flexibility in tight or awkward working environments.
Its rugged, compact construction ensures it performs reliably in demanding industrial conditions. With four distinct models available to cover a wide range of flange diameters, the SUMNER flange spreader is an essential tool for professionals seeking safety, efficiency, and reliability in flange maintenance and installation work.
| Product Name | Part No | Spread | Pin Diameter | Flange Capacity |
|---|---|---|---|---|
SI-301 – 3″ Flange Spreader |
78400 |
3″ / 76 mm |
9/16″ / 16 mm |
300 lbs: ¼” – 4″
400 lbs: ½” – 2″ 600 lbs: n/a 900 lbs: n/a 1,500 lbs: n/a |
-302 – 4″ Flange Spreader |
784002 |
4″ / 101 mm |
½” / 19 mm |
150 lbs: 2″ – 12″
300 lbs: 1½” – 8″ 400 lbs: 1″ – 4″ 600 lbs: 1″ – 4″ 900 lbs: 1″ – 2″ 1,500 lbs: 1″ – 2″ |
I-303 – 5″ Flange Spreader |
784001 |
5 |
5/8″ |
150 lbs: 5″ – 24″
300 lbs: 2½” – 12″ 400 lbs: 1½” – 8″ 600 lbs: 2″ – 6″ 900 lbs: 1″ – 4″ 1,500 lbs: 1″ – 3″ |
I-304 – 6½” Flange Spreader |
784000 |
6½” / 162 mm |
1″ / 25 mm |
150 lbs: 10″ – 24″
300 lbs: 7″ – 2″ 400 lbs: 3½” – 16″ 600 lbs: 4″ – 10″ 900 lbs: 1″ – 8″ 1,500 lbs: 1″ – 5″ |
Get in touch to find the right SUMNER flange spreader for your application.
