PSS Type A · dripless shaft seal
PSS Type A Dripless Shaft Seal — 55mm Shaft × 2-3/4" Stern Tube
Part number: PSS-02-55M-234
- Made by PYI Inc, USA
- Supplied assembled
- 316L stainless rotor
Genuine PSS Type A dripless shaft seal for a 55mm (2.16") propeller shaft and a 2-3/4" stern tube. Its nitrile bellows fits a stern tube outside diameter of 2-3/4" to 2-7/8" (69.9–73.0 mm).
- Shaft
- 55mm2.16"
- Stern tube
- 2-3/4"Standard bellows
- Fits tube OD
- 2-3/4" to 2-7/8"69.9–73.0 mm
$1,752.00 AUD, including GST.
Special order: we order this size in for you and dispatch it in 2–3 weeks. Confirm timing before booking installation work.
- Express Post Australia-wide: $32.95 for one seal.
- Genuine PSS, from Luxfords Marine: marine suppliers since 1963.
- Faulty or incorrect? We arrange the return at our cost.
- Secure card checkout, processed by Stripe.
- Unsure of the fit? Call (03) 5973 6444, Mon–Fri 8:00am–4:30pm.
Will this seal fit?
A PSS seal is chosen by two measurements: the propeller shaft diameter and the outside diameter (OD) of the stern tube. Check both against this part before you order.
| Shaft diameter | 55mm (2.16") |
|---|---|
| Stern tube size | 2-3/4" |
| Fits stern tube OD | 2-3/4" to 2-7/8" (69.9–73.0 mm) |
| Bellows | Standard |
| Seal type | PSS Type A |
| Part number | PSS-02-55M-234 |
How to measure
- Measure across the bare propeller shaft with callipers, at a clean, unworn section. This seal is for a 55mm shaft (2.16").
- Measure the outside diameter of the stern tube where the bellows will clamp over it. This seal fits 2-3/4" to 2-7/8" (69.9–73.0 mm).
- If your stern tube measures outside that range, choose the size below whose range covers it, or call us and we'll confirm the fit.
Our measuring guide shows where to take each measurement, and the seal finder lists every option for your shaft.
Other stern-tube sizes for a 55mm shaft
We list 7 PSS Type A seals for a 55mm shaft, one for each stern-tube size. Standard sizes cost $1,752.00 and oversized sizes $1,997.00, GST included.
| Stern tube | Fits stern tube OD | Price | Availability | Product page |
|---|---|---|---|---|
| 2-1/2" stern tubePart PSS-02-55M-212 | 2-1/2" to 2-5/8"63.5–66.7 mm | $1,752.00inc GST | Special order | |
| 2-3/4" stern tubePart PSS-02-55M-234 | 2-3/4" to 2-7/8"69.9–73.0 mm | $1,752.00inc GST | Special order | This seal |
| 3" stern tubePart PSS-02-55M-300 | 3" to 3-1/8"76.2–79.4 mm | $1,752.00inc GST | Special order | |
| 3-1/4" stern tubePart PSS-02-55M-314 | 3-1/4" to 3-3/8"82.6–85.7 mm | $1,752.00inc GST | Special order | |
| 3-1/2" stern tubePart PSS-02-55M-312 | 3-1/2" to 3-5/8"88.9–92.1 mm | $1,752.00inc GST | Special order | |
| 3-3/4" stern tube OversizedPart PSS-02-55M-334 | 3-3/4" to 3-7/8"95.3–98.4 mm | $1,997.00inc GST | Special order | |
| 4" stern tube OversizedPart PSS-02-55M-400 | 4" to 4-1/8"101.6–104.8 mm | $1,997.00inc GST | Special order |
How the PSS Type A is built
The PSS Type A is made by PYI Inc in the USA and supplied assembled, ready to fit. It is a mechanical face seal:
- Transmission turns the shaft
- Shaft coupling spins
- PSS rotor spins with the shaft
- Carbon flange stays still
- Bellows stays still, holds the faces together
- Stern tube the shaft log
- Propeller shaft spins
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Stainless-steel rotor
A 316L stainless-steel rotor clamps to the 55mm propeller shaft, sealed to it by two o-rings and held by two pairs of set screws.
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Carbon flange
The rotor spins against a stationary carbon flange.
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Nitrile bellows
A nitrile rubber bellows sized for a 2-3/4" stern tube clamps over the stern tube with hose clamps, and its pre-load keeps the two faces together.
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Water vent
A hose-barb vent feeds water to the faces to lubricate and cool them.
Inspect the bellows regularly and replace it about every six years with the PSS Maintenance Kit. Read the installation guide before fitting.
Delivery and returns
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Postage
Australia Post Express Post for one seal is $32.95, GST included. Checkout confirms the postage for your delivery postcode.
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Dispatch
Special order, dispatched in 2–3 weeks. Allow 1–7 business days for delivery after dispatch.
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Change-of-mind returns
Not accepted: special-order seals can't be returned for a change of mind once we've ordered them from our supplier.
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Faulty, damaged or incorrect items
We arrange the return at our cost and give you a full refund or a replacement.
Read our shipping and returns policy for the full terms. We deliver within Australia only.
Not sure which size you need?
Call us with your shaft diameter and stern tube outside diameter and we'll confirm the fit before you order. Mon–Fri 8:00am–4:30pm.