Mechanical Supplies
Strainers
About
- Oventrop "Series 801" Y-ball strainers in an oblique pattern body for vertical or horizontal installation, with a removable 20-mesh wire basket and integral PT (pressure/temperature) test port, bypass and drain ports. Wetted surfaces comply with NSF-372 at under 0.25% lead by weight.
Application
Supplied as part of the supply-side coil hookup kit on fan coil units and air handlers, and fitted upstream of pumps, control valves, flow meters and chiller evaporators. Most control valve failures found at commissioning are debris, not the valve, the drain port lets the basket be blown down without breaking the pipe joint, and a fine flushing mesh is swapped for the running mesh once the system is clean.
Standards & Reference 6 cited
EN 12266-1
Pressure testing of metallic valves: the shell and seat tests a valve passes before it leaves the factory.
EN 558
Face-to-face and centre-to-face lengths for valves in pipeline systems: the dimension that decides whether a replacement valve fits the existing gap.
EN 1092-1
Dimensions and pressure/temperature ratings for circular steel flanges, designated by PN. What makes a valve bolt up to the pipework it was specified for.
NSF/ANSI 61 Annex G
The lead-content limit within the drinking water standard: the basis of the 'lead-free' designation for potable water components.
NSF/ANSI 372
The standard that now carries the lead-content requirement for drinking water components, evaluating weighted average lead across wetted surfaces.
PN 16 / PN 25
Available in nominal pressure ratings of 16 and 25 bar, which sets both the flange drilling and the rated body pressure.
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