Product Description
Armstrong SG-425 Suction Guide – 4" x 2-1/2" ANSI 125 Flanged (516860-036)
The Armstrong SG-425 suction guide (part number 516860-036) 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 4" 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-425 has a ductile iron body and guide vanes with a stainless steel strainer.
| Model | SG-425 |
| Part number | 516860-036 |
| Connections | ANSI 125 flanged |
| Inlet (from system) | 4.00" (102 mm) |
| Outlet (to pump) | 2.50" (64 mm) |
| Strainer free area | 74.91 in² (483 cm²) |
| Maximum pressure | 175 psi |
| Maximum temperature | 300°F |
| Weight | 58.94 lb (26.7 kg) |
Design & Submittals
Materials of construction
- Body: Ductile iron
- Guide vanes: Ductile iron
- Strainer: Stainless steel, 0.188" 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 |
|---|---|---|---|---|---|---|---|---|---|
| 6.96 (177) | 4.20 (107) | 6.96 (177) | 12.04 (306) | 8.59 (218) | 0.75 (19) | 7.00 (178) | 1.13 (29) | 8.98 (228) | 7.28 (185) |
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 | 0.17 (0.05) | 0.29 (0.09) | 0.47 (0.14) | 0.68 (0.21) | 1.20 (0.37) | 1.90 (0.58) | 2.75 (0.84) |
| Flow | 118 (7.4) | 155 (9.8) | 198 (12.5) | 238 (15.0) | 315 (19.9) | 396 (25.0) | 475 (30.0) |
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 1.13" (29 mm) support pipe (dimension ØH), supplied by the contractor.
- Leave at least 7.00" (178 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.