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NON-ALLOY DUPLEX BAG FILTER HOUSINGS
Duplexed polypropylene and PVDF bag filter housings for aggressive fluids
Our non-alloy duplex bag filter housings are for applications where the process flow cannot be interrupted for filter bag changing. The decision to use PVC, CPVC and GFPP (polypropylene) materials of construction is typically driven by the aggressiveness of the fluid to alloy materials. While our non-alloy duplexed bag filter housings are the same cost or even slightly higher than equivalent 316 stainless steel versions, they are certainly less expensive than exotic alloys such as Inconel and Hastelloy C.
Our non-alloy duplexed bag filter housings have no metal components. The flow is diverted from the dirty housing to the clean housing by a pair of linked ball valves. The linkage simplifies the diversion process and ensure uninterrupted flow; without linkage you would require four valves and they would need to be operated in a certain order. It is possible to semi-automate diversion using pneumatic or electric valve actuators.
Unique design advantages
Each bag filter consists of a one-piece molded body and therefore has a smooth interior finish without seams characteristic of alloy bag filter housings. The smoother finish with internal taper leading to the outlet supports full drainage of the bag filter housing chamber. The true-union connections simplify connection to your piping and can have socket glued, threaded or flanged connections. Access to the bag filter chamber does not require tools, the oversized chamber cover handles enable removal and reinstallation by hand with little effort.
Catalog Pages for the #1 size duplex bag filter housing
Catalog Pages for the #2 size duplex bag filter housing
INSTALLATION/OPERATION MANUAL
| Item | #1 Size (7" x 16") | #2 Size (7" x 32") |
|---|---|---|
| Materials | PVC, CPVC, glass-filled polypropylene (GFPP) and PVDF. No metal wetted parts. | |
| Why duplex | Linked ball valves divert flow from the dirty chamber to the clean chamber so bag change-out does not stop the process. Actuators optional. | |
| Typical flow | Up to about 100 GPM (pipe and bag limited) | Up to about 100–150 GPM (pipe and bag limited) |
| Pressure | Typically 150 PSIG @ 70°F non-shock for Hayward FLV plastic duplex vessels | |
| Connections | True-union socket, threaded or flanged | |
| Cover | Hand-removable, no tools. One-piece molded body drains through a tapered outlet. | |
Need a Duplex Plastic Bag Filter?
Factory Direct help sizing POLYLINE and Hayward FLV duplex housings in PVC, CPVC, GFPP or PVDF. Keep flow on-line during bag change.
Request Pricing Order Filter Bags Call 908.362.9981Duplex Plastic Bag Filter FAQ
When do I need a duplex instead of a simplex?
When the process cannot be shut down to change a bag. Linked ball valves send flow to the standby chamber so one bag is always on-line.
Why plastic instead of 316 stainless?
PVC, CPVC, GFPP and PVDF are chosen when the fluid attacks alloys. These housings have no metal components. They cost about the same or a little more than 316SS, and far less than Inconel or Hastelloy C.
How is flow switched between chambers?
A pair of linked ball valves moves together. Without the linkage you would need four valves operated in a set order. Pneumatic or electric actuators can semi-automate the switch.
What bag sizes and connections are available?
#1 (7" x 16") and #2 (7" x 32") industry-standard bags. True-union socket, threaded or flanged ends. Covers come off by hand.