FGD Gypsum Vacuum Belt Cloth
FGD gypsum vacuum belt cloth is a variant of horizontal vacuum belt filter cloth, specified for flue-gas desulfurization gypsum dewatering.
Machines, duty and industries
Duty
Chemistry, wash and downstream quality questions belong on the application page. This page covers the cloth itself.
Industries
Not sure which belt you need? Tell us your duty →
FGD gypsum vs phosphogypsum
Both are gypsum and both dewater on a horizontal vacuum belt, but they arrive from different processes with different chemistry, so the cloth is specified differently. If you run both, do not assume one spare belt covers the other line.
Weave and polymer are chosen from your duty
Cloth polymer is chosen from your slurry chemistry — pH, temperature and particle size — not from a one-size catalog. In FGD service the chloride level and the wash regime are part of that decision, which is why we ask for them on the RFQ.
We do not publish cake-release, life or throughput figures for a weave. Those depend on the construction finally specified for your duty, and we would rather state that than print a number you cannot hold us to.
- PET monofilament
- PET monofilament + multifilament
- PP (polypropylene)
- DLW / MLW multi-layer weaves
- Special alkali- and hydrolysis-resistant grades
This is the industry-level range for horizontal vacuum belt filters. Our own mill's confirmed weavable polymer list is being confirmed in writing and is not published yet.
Parameters
Parameters to confirm with your RFQ
| Parameter | Unit | Test method | Status |
|---|---|---|---|
| Thickness | mm | Named on confirmation | To confirm per RFQ |
| Belt width (our own range) | mm | — | To confirm per RFQ |
| Belt length / circumference | mm | — | To confirm per RFQ |
| Pore size / micron rating | µm | Named on confirmation | To confirm per RFQ |
| Air permeability | CFM or l/dm²·min | Named on confirmation | To confirm per RFQ |
| Max slurry temperature | °C | — | To confirm per RFQ |
| Chemical resistance (acid / alkali) | — | — | To confirm per RFQ |
| Resistance in chloride-bearing FGD service | — | — | To confirm per RFQ |
Air permeability and tensile values are only meaningful with the test method named beside them. We will publish the method name with the value — we do not quote a standard number we have not verified ourselves.
Industry reference — not our mill's confirmed range
| Parameter | Industry reference | Unit | Note |
|---|---|---|---|
| Belt width, common machine range | 4,500 – 4,800 | mm | Upper end seen across the horizontal vacuum belt filter machine family. A machine-family reference, not a statement of what our mill can weave. |
The seam is matched to your existing belt
Clipper, PAD, spiral and overlap seams are fabricated to match the belt you are replacing. A close-up photo of your current seam is the fastest way for us to quote correctly.
Clipper
Photograph the hook strip and both pin ends.
PAD
Photograph the full joint across the belt width.
Spiral
Photograph the coil and the connecting rod.
Overlap
Photograph the overlap area and both belt edges.
Edge treatment (edge seal and similar) is specified with the seam. The exact seam and edge constructions our mill runs are being confirmed in writing and are not listed here yet.
What is made to order, and what we need from you
Made to your machine
- Belt width and circumference, from measurements off your machine
- Seam type matched to the belt you are replacing
- Edge treatment specified with the seam
- Perforation and drainage pattern reproduced where your old belt has one
Upper limits on width and length are confirmed per RFQ. We would rather confirm your dimension than advertise a range we have not put in writing.
What we need from you
- Machine brand and model — or "unknown"
- Belt width
- Belt length or circumference
- A close-up photo of the seam
- Confirmation that the duty is FGD gypsum
Every belt is fabricated to your machine dimensions — we quote per RFQ. No online checkout.
Fit is earned by data, not claimed
- 1 Unverified Listed machine, no verification record yet.
- 2 Dimension Confirmed Dimensions confirmed against your machine during the RFQ.
- 3 Trial Validated A trial belt has run and the result is recorded.
- 4 Production Validated Confirmed by repeat production use.
See the OEM compatibility table → · Confirm your machine dimensions →
How this cloth is produced and checked
- 01Materials
- 02Weaving
- 03Heat Setting
- 04Calendering
- 05Cutting
- 06Joint / Seam
- 07Edge Treatment
- 08QC — Air Permeability Testing
- 09QC — Tensile Testing
- 10Inspection
- 11Packing
- 12Export
Air permeability and tensile testing are part of the QC step. The specific test method names, and which steps run in our own mill for each cloth family, are being confirmed in writing and will be published once they are — we do not print a standard number we have not verified. Certificates are supplied as documents on request; we do not run a logo wall.
What goes wrong on a vacuum belt
A failure is not automatically a cloth failure. Root causes split between the cloth, the machine and the process — we will tell you when it is the machine, because a new belt will not fix it.
Asked before a quote
What information do you need to quote a replacement FGD gypsum belt?
Machine brand and model (or "unknown"), belt width and length, a photo of the old cloth and its seam, confirmation that the duty is FGD gypsum rather than phosphogypsum, and what failed. Optional but useful: pH, temperature, chloride level and particle size distribution.
This list grows from questions buyers actually ask us. We do not pad it with invented questions.
Get a quote for your FGD line
Send the machine brand and model, the belt width and length, a photo of the old cloth and its seam, and what failed.
Not sure about dimensions? Measure your old belt first.
Samples available — freight terms confirmed per request.