Innovative Solutions. Clear Results.



  • Innovative lid closure system opens in 30 seconds or less—no tools required, for faster change-outs with less effort
  • Hydraulic opening and lifting device offers improved ergonomics to avoid repetitive-use injuries
  • Splash shield, pressure relief valve, indicator lock pin and alignment pins assure safe operation
  • Standard design pressure rating of 150 PSI

About FSPN EZ-Open Filter Vessels

The FSI answer to time-saving operations is the patented FSPZ Easy Open Lid Vessel, the innovative alternative to manually opening and closing a filter vessel. Utilizing a unique sliding bracket retaining system, it’s operated simply by using the lid activator handle. The Easy Open Lid rotates and raises to a locked position in the time it normally takes to loosen one or two eyebolts on a conventional vessel.

The Easy Open Lid is available on bag filter models holding 4 to 24 bags. It can be fully opened in under 30 seconds which significantly lowers the cost of operating your vessels, and makes the change-out procedure easier and safer.

Video: How to Install a Bag Properly


Housing Materials

  • 304 stainless steel
  • 316 stainless steel
  • Carbon steel

Gasket Materials

  • Buna
  • Buna white FDA
  • EPR
  • Viton®

Number of Bags


Filter Bag Size

Multi-Bag Design: 2

Maximum Operating Pressure

150 PSI (10.34 Bar)

Design Temperature Range

Carbon Steel: 20 to 500°F (-6 to 250°C)
Stainless Steel: -20 to 250°F (-28 to 121°C)

Non-Wetted Parts

Carbon Steel: Carbon Steel
Stainless Steel: May contain some plated Carbon Steel materials

Number of Gaskets



Flange or NPT

Surface Finish

Carbon Steel: Acrylic enamel painted exterior
Stainless Steel: Light sand blast

Code Stamp (Size 1, 2 only)

ASME Sect VIII, Div 1, "U" or "UM" stamp

PolyLoc® Bag Seal

Positive Bag Seal without manual hold down

Lid Opening

EZ Open


U.S. Patent No. 8,083,087

Options & Accessories


  • 100 & 300 PSI designs (available on most models)
  • CE code designs
  • Partial heat jacket or full jacket
  • Corrosion allowance
  • Mesh lined and heavy-duty rim baskets
  • Sanitary or Victaulic connections (other connection types by request)


Chemical Compatibility


  • Recommended for most conditions up to the maximum temperature of the material. Recommended for most conditions up to the maximum temperature of the material.
  • Fair. May be acceptable, but testing is recommended. Fair. May be acceptable, but testing is recommended.
  • No data available. Customer testing required. No data available. Customer testing required.
  • Not recommended. Not recommended.


Download literature pertaining to this product

Download full product catalog


Other FSPN EZ-Open Literature:

FSPN Inlet/Outlet Configuration Diagrams

How to Order

Download ordering instructions in PDF format

Locate your representative or call 1.800.348.3205.

Bag Vessel Sizing Calculator

Results are approximate. Filter Specialists, Inc. makes no guarantees regarding their accuracy.

Measurement Preference
Process Conditions
Bag specifications



Process Condition values must not be zero Limit for viscosity is 10,000 centipoise Please enter a valid number. Number of bags used must be a positive integer Bag bags required Vessel Type Total PSI