Frequently Asked Questions

Yes, all of our seals can be rebuilt, except for current cartridge seals. The cost of the rebuild kit is usually 1/3 the price of a new seal and is easy to install, giving the customer leak-free service.

CinchSeals® are purged with air, or if air isn’t available they can be purged with silicone grease. If grease is used, the customer must put in enough grease to fill the entire seal cavity. Continue to install grease until it is seen leaking out of the inboard and outboard seal faces. Grease must be periodically added to ensure a higher and positive pressure inside the seal. We prefer the customer use air, but understand it isn’t always an option. Air purging does 3 things for the seal:

First, it creates pressure that pushes the rotor against the stator, closing the sliding interface and stopping any material from going into or out of the screw conveyor. Second, we tell people to set their air gauges 5 to 7 PSI higher than the vessel pressure to maintain higher pressure inside the seal than outside. This creates an air barrier to help keep product out of the seal. Thirdly, air keeps the rotating seal faces cooler by reducing temperature caused by friction. This helps prolong the life of the seal, and customers usually get 1 to 2 times longer life out of their seals when they use air.

Yes, our seals are designed to seal powder, and prevent lost product and eliminate shaft damage while doing so.

Yes, we would prefer that you remove the stuffing box, and be sure the clearance over the shaft is no larger than 1/4″. If your clearance is larger you will need an adapter plate to close down the opening and adjust to the bolting pattern. An adapter plate can also accommodate for packing wear on the shaft by moving the seal further down the shaft.

Yes, our seals are proven to handle liquids, cleaning agents, and flush water.

We do not recommend our standard seals for pumps because of the pressure and speeds involved.

We have done alloy 20, hastelloy c. Please inquire.

Our design department will work closely with your engineers to determine an effective and economical seal design for your equipment. We have done private labeling, and also can establish special blanket contracts. The blanket contracts will give you just-in-time delivery, lowering your inventory costs. Since the designs can be proprietary, your spare parts business is protected.

We must use an air purge in this case. Please check the shaft temperature where the seal will be installed. If it is 560°F, it will be too hot. If you are below 400°F, then we would recommend the seal.

CinchSeal is supported throughout North America by a representative network. We also work closely with the major distributions houses – Motion, Applied, and Kaman. CinchSeal can provide factory support for installation and training for a reasonable fee.

Rotary Shaft Seals by CinchSeal

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Rotary Shaft Seals

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