FAQ

Yes, it is possible to replace them with magnetic fluid seals.

Advantages

Please see the “What is a magnetic fluid seal?” page for details of advantages of magnetic seals.

Disadvantages

Please contact our sales personnel for details.

We have achieved peripheral speed of 21 m/s (with shaft diameter φ40, 10000 rpm) (special specification).

We have achieved the operating temperature atmosphere inside the vacuum device exceeding 1000℃(special specification).

Our magnetic fluid seals have been used for industrial adhesive stirrers and for sludge treatment equipment.

Please note that magnetic fluid seals cannot seal liquids directly.

Also note that any condensation of liquid used (such as solvents and media) on the sealing section can cause sealing failure or leakage.

Yes.

Our magnetic fluid seals ensure high-speed rotation and firm adsorption of samples without damaging samples.

Gases of multiple systems such as reactant gas and purge gas can be introduced from the magnetic fluid seals.

The equipment as a whole will be simpler and more compact.

We propose the magnetic fluid seal suitable for the type, temperature and concentration of gas.

We cooperate your needs to shorten work schedule.

We respond to a special order from one unit. According to your request, we offer designs utilizing our experiences.

The frequency of replacing varies according to your operating conditions.

Of course, they can be repaired.

To apply for repair, please send the item to us without disassembling, or please contact our sales personnel.

How much does it cost to repair?

As a rough standard, it is about half the price of a new product. (It varies according to the repair contents.)

How long does it take to repair?

After you send back the magnetic fluid seal, we will make a written estimate for repair.

The rough standard delivery period for repairment is about three weeks from the repair request.

The warranty period is one year from shipping.

You can download the Instruction Manual here.

A set of O-rings used for grooves are supplied with the product.

If you need spare items, please tell us upon placing of your order.

Keys and water cooling joints are not included. Please prepare by yourself according to your applications.

The rough standard of flow rate is 1 L/min. This amount is sufficient. They can withstand the pressure up to 0.5 MPa.

All our standard products comply with the RoHS.

For special specification products, we issue a certificate individually.

Rigaku’s magnetic fluid seals adopt a unique magnetic circuit configuration using multiple magnets.

This unique magnetic circuit allows our products to have higher sealing performance, higher resistance to external magnetic field, and fewer leakage magnetic fields than those made by other companies.

Please see the What is a magnetic fluid seal? page for details.

Rigaku’s magnetic fluid for high-temperature / high-vacuum applications is a clean magnetic fluid which achieves the industry’s lowest level of outgas.

It is ideal for semiconductor manufacturing and other process environments where contamination is strictly prohibited.

Please see the What is a magnetic fluid seal? page for details.

Of course, yes.

Please feel free to ask us for modification of a mounting hole, changing of shaft length, flange cut, etc.

Please note that a change in the shape requires a delivery period longer than the standard product.

There are following three possible causes for this trouble:

(1) Leakage from the magnetic fluid seal
(2) Leakage from the section for mounting the magnetic fluid seal
(3) Leakage from other parts

If it seems to be the case (1), please contact our sales personnel.

In order to determine whether the cause is the magnetic fluid seal or other parts in the equipment, please check the variations in pressure according to the rotation of magnetic fluid seal first, and contact our sales personnel.

(When you start the equipment after a prolonged period of disuse, a temporary pressure variation may occur upon the start of rotation.)

There are following six possible causes for this trouble:

(1) Leaving it in disuse for a prolonged period of time
(2) It is winter or a low temperature
(3) Deposition of products on the surface and / or the inside of magnetic fluid seal
(4) Entry of foreign matters to the inside of magnetic fluid seal
(5) Deterioration of bearing grease
(6) Damaged bearing

In the case of (1) or (2), the problem may be eliminated by pre-conditioning operation.

Please see the section of “What is a pre-conditioning operation?” in the FAQ for details of pre-conditioning operation.

If the problem is not eliminated after the pre-conditioning operation, please contact our sales personnel.

Overhaul is required. Please send it to us without disassembling, or contact our sales personnel.

Please contact and inform our sales personnel about the type and the approximate quantity of liquid in contact.

Depending on the information, sending back for investigation and repair may be necessary.

In this case, the cost of investigation and repair will be charged to you even within the warranty period.

Please contact our sales personnel and inform about the height of dropping, the conditions of crashed parts, etc.

Depending on the information, sending back for investigation and repair may be necessary.

In this case, the cost of investigation and repair will be charged to you even within the warranty period.

Immediately stop the equipment and contact and inform our sales personnel about the conditions.

Immediately stop the equipment and contact and inform our sales personnel about the conditions.

Of course, they can be repaired.

To apply for repairment, please send it to us without disassembling, or please contact our sales personnel.

How much does it cost to repair?

As a rough standard, it is about half the price of a new product. (It varies according to the repair contents.)

How long does it take to repair?

After you send back the magnetic fluid seal, we will make a written estimate for repair. The rough standard delivery period for repairment is about three weeks from the repair request.

No. Do not repair magnetic fluid seals by yourself.

To apply for repairment, please send it to us without disassembling, or please contact our sales personnel.

Please note that any magnetic fluid seals disassembled by yourself will not be covered by warranty.

The frequency of replacing varies according to your operating conditions. Please contact our sales personnel for details.

It is a warming-up operation of magnetic fluid seal to reduce pressure variations during starting of the magnetic fluid seal rotation.

Please rotate the shaft 20 times or more before the start of vacuuming. You can use any type of driving.

When storing magnetic fluid seals, please keep them in the packaging as they were shipped and in a place with little change in temperature.

In the case that you have opened the packaging for shipping, please cover the magnetic fluid seals with a plastic bag, a wrapping film, etc. and store in a place with low humidity, minimal dust and little change in temperature.

Yes, you can. Before using, please carry out pre-conditioning operation sufficiently.

For an explanation of pre-conditioning operation, please read the section of What is “a pre-conditioning operation”?

Yes. We have been certified to ISO9001 and ISO14001 (both for the 2015 version).