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Description
Shaft Seal 45mm Shaft & 3-1/4" Tube
This Type A PSS Shaft Seal is a mechanical face seal. The sealing surface is created between the flat surfaces of the rotating stainless-steel rotor and the stationary carbon flange.
The PSS Shaft Seal is the #1 selling marine mechanical seal worldwide and is installed as standard equipment by many of the world's most reputable boat builders and boat yards. The PSS Shaft Seal is also recognized as the premiere retrofit (aftermarket) seal on the world market. Boat builders and boat yards recognize the advantages and value of installing the PSS, as it eliminates the maintenance, constant adjustment, and cost associated with traditional packing-type glands. Aside from these benefits, the PSS Shaft Seal helps to eliminate water in the bilge (100% watertight) and wear to the propeller shaft.
How Does it Work?
- Two nitrile o-rings seal the stainless steel rotor to the shaft and will not experience wear.
- A primary set screw and a backup set screw (2 sets) are used to secure the stainless steel rotor to the shaft.
- A seal is created between the two flat surfaces of the carbon stator and the stainless steel rotor.
- Water is fed into the PSS Shaft Seal for cooling/lubricating the seal faces on high-speed vessels.
- The stationary carbon stator is attached to the nitrile bellow, which is attached to the stern tube (shaft log).
Rotor
The rotor is made out of 316L stainless steel and machined to a 9-12Ra finish on precision CNC lathes. It is secured on the shaft using 2 pairs of set screws positioned at a 90-degree angle for maximum holding power. The stainless steel rotor further polishes the carbon stator during the initial hours of operations.
Carbon Stator
The high-density, resin-impregnated carbon stator is manufactured from an advanced composite that is first mixed and molded and then formed under pressure. The blank parts are then baked, machined, and lapped to a measured flatness of 4 helium light bands (measured at 0.000044" of variation over its entire lapped surface). The grade of carbon composite used in the PSS Shaft Seal has a maximum operating temperature of 500°F (+260°C) and cannot melt if the seal runs dry for a short period of time, unlike a lip seal or a plastic face seal. In addition, the high density of the carbon greatly increases longevity and wear resistance. As a result, several commercial vessels have recorded over 40,000 engine hours (over 4 1/2 years of continuous operation) on the same original components.
Bellows
The bellows on the Type A seal are molded out of a Nitrile compound. Nitrile is known for its good resistance to petroleum products. In addition, it provides the best combination of durability, strength, and elasticity necessary for this application.
Hose Barb
For high-speed vessels (12+ knots), a positive water supply is required to be plumbed to the PSS Shaft Seal for lubricating and cooling the seal faces. Please review the PSS Shaft Seal Installation Instructions for more information on pickup points for water supply. In most cases, a slow-speed boat (less than 12 knots) that does not have a bearing on the shaft log does not require positive water feed and can simply be vented. Ideally, the vent line will be run at least 2-3 feet above the waterline and as close to the centerline as possible. This will ensure the vent hose is never below the water line, even with significant healing. PSS Shaft Seal Installation Instructions have more details on venting the seal.
Specifications:
- Temperature Limits: 5°F to 225°F (-15°C to 107°C)
- Pressure Limits: 15 PSI (1 BAR)
- Shaft RPM Limits: 10,000 RPM
- Carbon Graphite: Lapped to 4 HLB (0.000044" tolerance)
- 316SS / Nitronic 50: Faced to 9-12 Ra
- Bellows Material: Molded Nitrile - PVC
- Shaft Diameter: 45mm
- Stern Tube Diameter (inch): 3-1/4" to 3-3/8"
- Approximate Length: 9.2175 in.
- Approximate Compression: 1 in.
- Rotor Diameter: 3.75 in.
- Stern Cuff Length: 2 in.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Refund Policy
Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.
To be eligible for a return, your item must be unused, unmarked, unbroken and in the same condition that you received it. It must also be in the original packaging.
Several types of goods are exempt from being returned. Goods such as made-to-order products (leather, jewelry, wedding, etc.) personalized items, all mats/rugs, audio/visual, customized gifts, select wedding items, educational items or open boxed items cannot be returned. We also do not accept products that are intimate, hazardous materials, or flammable liquids or gases in any personal care products
Additional non-returnable items:
- Gift cards
- Some health and personal care items
- Used electronics items
To complete your return, we require order details including a receipt or proof of purchase.
- Please send us an email at customer.service@jademoghul.com
- Send message requesting RMA for specific product, include order number and email used in original purchase.
- Within 48 hours you shall receive an RMA
- Ship your product to our Return Center provided for the specific product type
- Once Merchandise has been received and inspected, a refund will be issued.
- Please Note that a 25% restocking fee is applicable to returns.
Please do not send your purchases before you hear back from us with the required information.
There are certain situations where no refunds are granted: (if applicable)
- Books with obvious signs of use
- CD, DVD, VHS tape, software, video game, cassette tape, or vinyl record that has been opened.
- Any item not in its original condition, is damaged or missing parts for reasons not due to our error.
- Any item that is returned more than 30 days after delivery (Customer has to directly contact the manufacturer for warrantied items)
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 2 - 3 weeks.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, please take the following steps beef contacting us:
- First check your payment method and/or bank account again.
- Then contact the relevant institution, it may take some time before your refund is officially posted.
- Next contact your bank. There is often some processing time before a refund is posted.
If you’ve done all of this and you still have not received your refund yet, please contact our customer service.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Exchanges (if applicable)
We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email to initiate the exchange process:
Gifts
If the item was marked as a gift when purchased and shipped directly to you, you’ll receive a gift credit for the value of your return. Once the returned item is received, a gift certificate will be mailed to you.
If the item wasn’t marked as a gift when purchased, or the gift giver had the order shipped to themselves to give to you later, we will send a refund to the gift giver and he will find out about your return.
Shipping
To return your product, you should mail your product to: JadeMoghul Inc. RMA. You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
Depending on where you live, the time it may take for your exchanged product to reach you, may vary.
If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.