A retrofit survey needs more than pipe diameter. Record connection type and orientation, centerline elevations, vessel footprint, supports, nearby obstructions and the room needed to open the housing and remove its filter elements. The survey should be reviewed with process conditions and equipment documents by the project’s responsible designer before equipment is ordered.
Record connection and installation dimensions
Note pipe material, connection type, inlet and outlet orientation, centerline height, flange or thread specification, existing valves and the measurement reference used. Photograph the whole installation and each connection close up. Label units, directions and the person who took each measurement so another engineer can review the information.
In a restricted area, check the cover opening path, the length required to remove bags or cartridges, lifting access and operator working space. Record the vessel height, base and support locations, pipe supports, nearby equipment, insulation, cable trays and other obstructions. A product’s published dimensions and required service clearance are specific to its model; verify the drawing for the exact item being considered.
Check process conditions and project limits
Provide normal and peak flow, liquid, temperature, pressure, operating mode, filtration objective and the reason for the modification. Review pressure loss, housing materials, maintenance access, isolation, venting and drainage needs with the design team. Matching the existing pipe connections alone does not establish that the replacement filter fits the duty or layout.
Any welding, pipe cutting or support change should be carried out under approved project drawings by the responsible engineering and installation personnel. Keep the measurement sheet, nameplate, photographs, flow diagram and existing equipment documents together, then obtain technical confirmation before purchase and construction.
Make the survey easy to check
Create a dimensioned sketch that marks the measurement datum, units, inlet and outlet centerlines, connection standards, overall height, footprint, supports, cover swing and element-removal route. Identify which values were measured on site and which came from an old drawing. If an internal connection cannot be measured directly, document the source of that value and have the project owner confirm it.
Compare the sketch with the actual location before installation. If the drawing and field conditions disagree, resolve the difference before the equipment arrives; an apparently compatible nozzle may still leave no room to open or service the housing.
Filter products and inquiries
Shenzhen Guangxiangyu Technology Co., Ltd. supplies bag filter housings, precision filter housings and related consumables. For a retrofit discussion, share a dimensioned sketch, connection photos, liquid and operating parameters, and the intended maintenance access with Liu Nan, Sales Manager, at LiuNan2553@gmail.com. Final drawings, load checks and site construction should be confirmed by the project’s responsible professionals.
See our bag filter housings, precision filters and contact page.
Technical reference
Pall PCY Series Filter Housings lists model-specific connection details, dimensions and overhead clearance for cartridge removal. Use the dimensional drawing for the exact housing selected; it is not a universal installation layout.