When the piping, the process or the specification will not accept a standard configuration.
Most straining duties are met by a standard configuration in an appropriate size, class and material. Some are not — because the space envelope will not take a standard body, because the nozzles have to sit at an angle the piping dictates, because the fluid needs heating to stay pumpable, or because a project specification imposes requirements a catalogue item does not address.
In those cases the strainer is engineered around the constraint. Because Hydrotherms manufactures fabricated strainers in-house, the body geometry, nozzle arrangement, screen configuration and mounting can all be set by the application rather than by a standard pattern.
A fixed space envelope, an awkward elevation, or nozzles that have to be offset or rotated to suit existing piping — constraints a standard body simply cannot accommodate.
Highly viscous fluids that need steam jacketing to stay pumpable, entrained air that has to be removed, or solids loading that demands a larger or different screen arrangement.
Client specifications imposing particular testing, certification, coating systems, code stamping or documentation that go beyond a standard supply.
The starting point is the constraint itself — the envelope, the elevation, the fluid behaviour or the specification clause — and the strainer is configured to satisfy it while still meeting the hydraulic and filtration requirement. Options in regular use include offset and rotated nozzles, steam jacketing for viscous fluids, quick-opening and davit-assisted closures, multiple basket arrangements, pleated and wedge-wire elements, magnetic inserts, air and vapour eliminators, and skid or support-leg mounting.
Screens can be supplied in perforations from 1/32″ to 1/2″ and meshes from 20 through to 400, in upgraded materials including Monel and Hastelloy C where the service requires it. Fabrication is carried out with welding to ASME IX and NDE to code requirements, with the full range of testing and EN 10204 certification available. Where the project calls for it, a general arrangement drawing is issued for approval before manufacture.
Six governing inputs, one evaluation, four engineered outputs. A custom design starts from the constraint that rules out the standard option, then works back to the hydraulics.
The constraint is treated as the primary input. Everything else is engineered to satisfy it without compromising the filtration or hydraulic requirement.
| Requirement | Possible Solution |
|---|---|
| Restricted space envelope or awkward geometry | Fabricated body with offset / rotated nozzles |
| Highly viscous fluid | Steam jacketed strainer |
| Very high dirt-holding requirement | Multiple basket arrangement or pleated elements |
| Project-specific testing, coating or documentation | Specification-driven fabricated design |
A custom design is not automatically the right answer. Where a standard configuration meets the duty it will be quicker and more economical — we will say so rather than engineer something unnecessary.
For a custom design, the constraint matters as much as the process data. Tell us what rules out the standard option.
Fabricated construction in carbon steel, low-temperature carbon steel, alloy steel, stainless steel, duplex and super duplex, and nickel alloys including Monel, Inconel and Hastelloy. Screens in perforations from 1/32″ to 1/2″ and meshes from 20 to 400, with upgraded basket materials, special gaskets and seals, and special coatings or linings available.
Where a strainer is being engineered into existing piping, send the layout drawing or the dimensional constraint along with the process data. A general arrangement drawing is issued for approval before manufacture so the interfaces, nozzle orientation, access clearance and support arrangement are agreed before anything is fabricated.
Anything where the geometry, connections, screen arrangement or features are set by the application rather than by a standard configuration — offset nozzles, steam jacketing, multiple baskets, skid mounting, non-standard end connections, or specification-driven testing and documentation.
It involves an engineering and approval step that a standard item does not, so it should be raised early in the project. Where a standard configuration meets the duty, we will recommend it instead.
Yes. Send the specification, datasheet or piping drawing and we will review it against what we can supply, and identify anything that needs clarification before we quote.
Yes. A general arrangement drawing is issued for approval before manufacture where the project requires it, so nozzle orientation, dimensions, access clearance and support arrangement are agreed in advance.
Steam jacketing for viscous fluids, offset or rotated nozzles, quick-opening and davit-assisted covers, magnetic inserts, air and vapour eliminators, pleated and wedge-wire elements, multiple basket arrangements, zinc anodes, special coatings and skid mounting.
Send the constraint that rules out a standard strainer, together with flow rate, line size, fluid, pressure, temperature and filtration requirement — plus any layout drawing or specification.
Submit RequirementNot sure whether your requirement needs a custom design? Describe the constraint and we will tell you honestly whether a standard configuration will do.
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