A useful bag filter housing quotation is based on the complete process and mechanical scope. Published list prices rarely support a valid comparison because material, bag count, pressure rating, closure, connections, testing and documentation can change the supplied configuration.
Process duty defines the base configuration
Flow, viscosity, solids loading, micron rating and allowable pressure drop determine the filtration area and whether a single-bag, multi-bag, duplex or parallel arrangement is appropriate. A lower purchase price can be misleading if the selected housing creates frequent bag changes or excessive pressure loss.
Material and design conditions affect fabrication
Carbon steel, stainless steel, plastic and special-alloy options have different cost drivers. Selection should be based on chemical composition, concentration, temperature, pressure, cleaning method and corrosion allowance. Design code, wall thickness, surface finish and weld documentation should be stated before quotations are compared.
Closure, connections and accessories change the scope
Cover style, seal material, nozzle size and orientation, flange standard, vent, drain, gauge ports, differential-pressure instruments, support legs, lifting features and insulation provisions should be listed clearly. A quote that excludes required accessories is not directly comparable with a complete package.
Testing and documentation should be priced explicitly
Hydrostatic or pneumatic testing, material certificates, welding records, surface-finish reports, inspection plans, drawings and third-party review may be required by the project. Confirm which documents are included, which are optional and which standards apply.
Consider delivered and operating cost
Freight volume, packaging, duties, installation work, replacement filter bags and maintenance access all affect total cost. Compare suppliers using the same technical data sheet and the same delivery basis. Service life and operating savings should not be treated as fixed values without application data.
RFQ checklist
- Fluid, solids and required micron rating
- Normal and maximum flow, pressure and temperature
- Allowable pressure drop
- Housing, basket and gasket materials
- Bag size, quantity and sealing style
- Connection standard, size and orientation
- Closure and maintenance requirements
- Testing, drawings and quality documents
- Quantity, delivery destination and Incoterm
Use the FiltEdgeUS filter housing resource center to review configurations. U.S. project inquiries can continue through FiltEdge; manufacturing and engineering documentation can be reviewed with SFFILTECH.
Request a Comparable Quotation
Send one process data sheet and required supply scope so the housing configuration, exclusions and documentation can be compared on the same basis.