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Brand: Swagelok
Swagelok SS-4FW-15 All-Welded Inline Filter, 15 Micron
Description
The Swagelok SS-4FW-15 is a small all-welded inline filter that protects instruments, regulators and valves from particles. Its pleated 316 stainless steel mesh element has a 15 micron nominal pore size, it is welded to the body so that no particle can bypass the element, and it connects to 1/4 in. tubing with Swagelok tube-fitting ends at both sides. It is meant for cases where space is limited and an element-replacement housing is not wanted.
Technical specifications
| Parameter | Specification |
|---|---|
| Part number | SS-4FW-15 |
| Description | All-welded inline filter, pleated mesh element |
| Series | FW |
| Body and element material | 316 stainless steel |
| Connections | 1/4 in. Swagelok tube fitting x 1/4 in. Swagelok tube fitting |
| Element nominal pore size | 15 micron (pleated) |
| Orifice | 0.187 in. (4.75 mm) |
| Overall length A | 2.15 in. (54.6 mm) |
| Pleated element filtration area | 2.25 in. squared (1450 mm squared) |
| Maximum differential pressure, pleated | 100 psig (6.8 bar) |
| Working pressure | 6000 psig (413 bar) at -20 to 100 F; 3280 psig at 900 F |
| Temperature range | -20 F to 900 F (-28 C to 482 C) |
| Cleaning | Standard cleaning and packaging SC-10 |
How the FW series works
In the FW series the filter element is welded into the body, so the fluid has to pass through the media and cannot find a bypass path along a seal. The catalog notes that the body-to-element weld prevents bypass flow and that the filter is easily cleaned by backflushing. The 15 micron pleated mesh gives 2.25 in. squared (1450 mm squared) of filtration area, compared with 0.44 in. squared for the sintered 0.5 micron element, so it handles more flow before the pressure drop rises. Pleated elements are offered in 2, 7 and 15 micron sizes, and a sintered 0.5 micron version is also available.
The nominal pore size is not an absolute rating; the catalog defines it for the F and TF series as removal of 95 percent of particles larger than the stated size, so choose a finer element if downstream devices are very sensitive.
Pressure, temperature and flow
Working pressure for the FW series in 316 stainless steel is 6000 psig (413 bar) from -20 F to 100 F, reduced to 5160 psig at 200 F, 4280 psig at 400 F, 3760 psig at 600 F and 3280 psig at 900 F (482 C). Maximum differential pressure across the pleated element is 100 psi (6.8 bar), and across the sintered element 600 psi (41.3 bar). The catalog flow table lists water flow of 1.7 US gal/min at 10 psi pressure drop for 2, 7 and 15 micron elements with tube-fitting ends, rising to 8.3 US gal/min at 100 psi.
The 0.187 in. orifice is the nominal opening through the body. Tube ends make the filter 2.15 in. long; the female NPT version SS-4FW4- is only 1.57 in. long.
Ordering and installation
SS-4FW-15 reads stainless steel, FW series, 1/4 in. tube fittings, 15 micron pleated element. The 0.5 micron sintered element uses FWS and designator 05 (SS-4FWS-05), and 2 or 7 micron elements are SS-4FW-2 and SS-4FW-7. Metric 6 mm tube fittings, NPT and male VCR ends are listed too. Fit the filter with the flow direction marked on the body and put it ahead of the device you want to protect.
Because the element is welded in, it cannot be replaced; clean by backflushing or replace the whole filter. Use the F or TF series with replaceable elements if you want to change the element in service. Check the catalog before using in steam or oxygen service.
Documents and quotation
For the full data, download the Swagelok filters FW, F and TF series catalog MS-01-92 (EN) attached here. Quotation requests for SS-4FW-15 are matched to the exact order code, so include the quantity and any option designator. We are an independent supplier based in Muscat.
Before ordering, please confirm the part number, tube size and thread type against the attached catalog, as nearby codes differ by one character. Related items: product category.
Datasheets & Documents
- Catalog Swagelok filters FW, F and TF series catalog MS-01-92 (EN) Download
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About brand
Swagelok is the American maker of tube fittings and small-bore valves, best known for its two-ferrule compression tube fitting. Fred A. Lennon and Cullen B. Crawford founded it in Cleveland, Ohio, in July 1947 as Crawford Fitting Company to make that fitting. Lennon bought the whole business and the patent in 1948, and the company has been based in Solon, Ohio, since the mid-1960s.
Seven Star LLC is an independent supplier in Muscat. We list Swagelok tube fittings, needle, ball, check, relief and metering valves, filters, regulators and sample cylinders, and supply them for instrument tubing and analyser systems in Oman and the GCC by exact part number.
Swagelok company profile
| Established | July 1947, Cleveland, Ohio, as Crawford Fitting Company |
|---|---|
| Founders | Fred A. Lennon and Cullen B. Crawford; Lennon bought out Crawford in 1948 |
| Headquarters | Solon, Ohio, since the mid-1960s |
| Product families | Tube fittings and adapters, face seal fittings, needle, ball, plug, check, relief and diaphragm valves, filters, regulators, quick-connects, sample cylinders and hoses |
Milestones
- 1947: Fred A. Lennon and Cullen B. Crawford found Crawford Fitting Company in Cleveland in July.
- 1948: Lennon buys out Crawford.
- Mid-1960s: Headquarters move to Solon, Ohio.
Swagelok products we list
| Family | Models | Typical use |
|---|---|---|
| Tube fittings | Overview, SS-810-6 union, SS-810-3 tee, SS-810-9 elbow, SS-810-4 cross, SS-810-1-8 male connector, SS-810-7-8 female connector, SS-810-61 bulkhead, SS-12M0-6 metric union, VCR face seal | Leak-tight connections on instrument and process tubing |
| Needle and metering valves | SS-1RS4, SS-1RF4, SS-18RF6, SS-6NBS6, SS-20VS4, SS-4MG | Isolation and fine flow adjustment on instrument lines and sample systems |
| Ball and plug valves | 40G, 40GX 3-way, 60 Series, 83 Series, P4T plug | Quick quarter-turn shut-off and switching |
| Check, relief and sealed valves | SS-4C-1, CH, R3A, RL3, SS-4BK bellows, SS-DLS4 diaphragm | Backflow prevention, overpressure relief and leak-free sealing for toxic or high-purity media |
| Filters, regulators, sampling | SS-4F-2, SS-4TF-7, KPR regulator, sample cylinders, QC quick-connects | Analyser sample conditioning and gas or liquid sampling |
A Swagelok part number can be read directly. In SS-810-6, "SS" is 316 stainless steel, "810" means a 1/2 in. tube fitting (8 sixteenths of an inch, 10 series), and "-6" is a union. A suffix such as "-8" adds a 1/2 in. NPT end, and "M0" marks metric tube, as in SS-12M0-6 for 12 mm. Tube fittings must be made up the same way every time: finger-tight, then 1 1/4 turns for most sizes. A gap inspection gauge confirms the fitting has been pulled up.
Where Swagelok products are used
In Oman and the GCC, Swagelok fittings and valves are used on instrument impulse lines, analyser sample systems, hydraulic and pneumatic control tubing, chemical injection and gas sampling in oil and gas, refining, petrochemical, power and laboratory installations.
Ordering Swagelok products: what we need
Send the full Swagelok part number (for example SS-810-6 or SS-1RS4), the material, and the tube size in inches or millimetres. For valves, add the end connections and any options. For sample cylinders, add the volume, pressure rating and end configuration.
Facts checked against Swagelok company history, October 2026.
Browse Swagelok products by category: Pipes & Fittings, Regulators, Fittings & Valves.
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Frequently Asked Questions
What does the 15 in SS-4FW-15 mean?
It is the nominal pore size of the pleated mesh element in microns.
Can the element be replaced?
No. In the FW series the element is welded to the body; the filter can be backflushed or replaced as a unit.
What are the end connections?
1/4 in. Swagelok tube fittings on both ends.
What is the maximum differential pressure?
100 psig (6.8 bar) across the pleated element, according to the catalog.
What is the working pressure?
6000 psig (413 bar) at ambient temperature in 316 stainless steel, derating at higher temperature.
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