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VF-9LSLong Stroke

Type 9 Brake Chamber Diaphragm, Long Stroke

Viaforta VF-9LS is a Type 9 long stroke air brake chamber diaphragm, fabric-reinforced and manufactured in Türkiye, for Type 9 service brake chambers. Free samples available; quotation within 24 hours.

Specifications

Specifications
Size9LS
Stroke typeLong Stroke
MaterialFabric-reinforced rubber compound, made in Türkiye
FitmentDirect fit for Type 9 service brake chambers
Viaforta part no.VF-9LS

Dimensional data is not published. Manufacturing tolerances vary between production batches, and a fixed published figure that a shipment later disagrees with is worse than no figure at all. Fitment is confirmed by Type and stroke, and by the OEM number stamped on your chamber.

Order quantities and lead times are confirmed per order — request a quote.

Request a free sample

Up to 10 pieces, free of charge — you pay the shipping. Fit them and judge the part yourself.

Get a quote for VF-9LS

Send the part number and the quantity you need. You will get a price in USD, Incoterms and a lead time within 24 hours.

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Free samples up to 10 pieces are available on request; you cover the shipping only.

Prices are quoted in USD, EXW or FOB Istanbul. Freight is arranged separately. Payment by bank transfer or letter of credit against a proforma invoice.

OEM cross reference

Cross-reference data for this size is being expanded. If you have an OEM number for a Type 9 long stroke chamber, send it to us and we will confirm the match within 24 hours.

How does this part work?

The diaphragm sits between the two halves of the service brake chamber. When the driver applies the brake, compressed air fills the chamber on one side of the diaphragm; the diaphragm deflects and drives the push rod out, which rotates the slack adjuster and applies the foundation brake. Releasing the pedal vents the air and the return spring pushes the diaphragm back. A Type 9 diaphragm presents 9 square inches of effective area to that air pressure, which is what determines the output force of the chamber.

How air brake chamber diaphragms work →

Why Viaforta?

  • Our own rubber formulation

    The rubber mix is prepared at the production facility rather than bought in ready-made. Most competitors buy pre-mixed compound; controlling the mix is a real and checkable technical advantage.

  • Free samples, up to 10 pieces

    Test before you commit. You pay only the shipping.

  • Every size from one source

    Type 9 through Type 36, normal and long stroke, from a single supplier and a single set of documents.

  • Made in Türkiye

    Manufactured at our production partner's facility in Istanbul, Türkiye.

Frequently asked questions

Which brake chambers does VF-9LS fit?
It fits Type 9 long stroke service brake chambers. Confirm by the Type marking on the chamber body, or by matching the OEM number stamped on the chamber against the cross-reference table above.
Can I use a normal stroke diaphragm in a long stroke chamber?
No. Long stroke chambers need the deeper diaphragm profile to reach full travel. Fitting a normal stroke diaphragm reduces available stroke and can cause the brake to run out of adjustment. The two are not interchangeable in either direction.
What material is used?
Fabric-reinforced rubber, blended to a formulation of our own rather than purchased pre-mixed. The reinforcing fabric is what carries the pressure load and stops the rubber stretching under repeated cycling.
Do you publish dimensions?
No. Manufacturing tolerances vary between production batches, and publishing a fixed figure that a later shipment disagrees with is worse than publishing none. Fitment is identified by Type and stroke, and confirmed against the OEM number.
What is the minimum order quantity?
Order quantities are agreed per order and small trial quantities are accepted. Request a quote with your part number and quantity and you will get a firm answer within 24 hours.
Can I get a sample before ordering?
Yes — up to 10 pieces free of charge, with shipping at your cost. This is the fastest way to evaluate the part.

Related sizes

The other stroke in the same Type, and the nearest sizes either side.

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