Product Description
Armstrong SG-325 Suction Guide – 3" x 2-1/2" ANSI 125 Flanged (516860-018)
The Armstrong SG-325 suction guide (part number 516860-018) is installed at the suction side of a centrifugal pump to turn the flow 90°, straighten it with internal guide vanes and strain out debris before it reaches the pump. With a 3" inlet and 2-1/2" outlet, it replaces an elbow, strainer and straight run of pipe in one compact fitting, saving space in mechanical rooms. It is rated for 175 psi and 300°F, and the SG-325 has a cast iron body and guide vanes with a stainless steel strainer.
| Model | SG-325 |
| Part number | 516860-018 |
| Connections | ANSI 125 flanged |
| Inlet (from system) | 3.00" (77 mm) |
| Outlet (to pump) | 2.50" (64 mm) |
| Strainer free area | 31.79 in² (205 cm²) |
| Maximum pressure | 175 psi |
| Maximum temperature | 300°F |
| Weight | 35.00 lb (15.8 kg) |
Design & Submittals
Materials of construction
- Body: Cast iron
- Guide vanes: Cast iron
- Strainer: Stainless steel, 0.125" (3 mm) perforations
- Start-up strainer: Fine mesh galvanized steel (remove after 1 week)
- Inlet gauge tapping: 1/4" NPT, plugged
- Magnetic plug: Standard
Dimensions – inches (mm)
| A | B | C | D | E | F | G | ØH | ØI | ØJ |
|---|---|---|---|---|---|---|---|---|---|
| 5.50 (140) | 3.06 (78) | 4.90 (124) | 8.50 (216) | 5.86 (149) | 0.50 (13) | 4.75 (121) | 0.94 (24) | 7.81 (198) | 7.12 (181) |
G = clearance to withdraw strainer. ØH = support pipe size (supplied by contractor). Dimensions are for reference only; tolerance ±0.125" (±3 mm). Certified dimensions available on request.
Pressure drop – ft (m) of water at flow in USGPM (L/s)
| Velocity ft/s (m/s) | 3 (0.91) | 4 (1.22) | 5 (1.52) | 6 (1.83) | 8 (2.44) | 10 (3.05) | 12 (3.66) |
|---|---|---|---|---|---|---|---|
| Pressure drop | 0.18 (0.05) | 0.32 (0.10) | 0.50 (0.15) | 0.72 (0.22) | 1.28 (0.39) | 2.00 (0.61) | 2.88 (0.88) |
| Flow | 45 (2.8) | 50 (3.2) | 75 (4.7) | 90 (5.7) | 120 (7.6) | 150 (9.5) | 180 (11.4) |
Documents
- Model SG Suction Guide Submittal (PDF)
- SG & FTV Product Information Brochure (PDF)
- Suction Guide Typical Specifications (DOC)
Warranty
Covered by the Armstrong Fluid Technology manufacturer's warranty.
- Armstrong Terms of Sale & Warranty – Canada (PDF)
- Conditions de vente et garantie Armstrong – Canada, français (PDF)
Installation, Maintenance, Parts Kits & Manuals
- Companion flanges are not included.
- Support the suction guide with a 0.94" (24 mm) support pipe (dimension ØH), supplied by the contractor.
- Leave at least 4.75" (121 mm) clearance (dimension G) to withdraw the strainer for cleaning.
- Remove the fine mesh start-up strainer after 1 week of operation.
- The 1/4" NPT inlet gauge tapping is supplied plugged; the magnetic plug collects ferrous debris and should be checked during routine maintenance.
- Replacement strainers, start-up strainers and gaskets are available – see the replacement parts list below, then call (416) 236-2338 or email sales@bramhambros.com to order.