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Sealing Business

Use Cases

AIR WATER MACH's products are used in a variety of fields.


Engines, etc.


Brake valves
Clutch cylinders, etc.


Wheel bearing covers


Rudder cylinders
Sterling engines, etc.

Construction machinery

Arm cylinders, etc.

Building supplies

Door closers, etc.

Medical supplies

Syringes, etc.

Boiler water supply pumps


Level sensors

Shock absorbers


Questions received from customers and their answers.

What kind of rubber is durable with mineral oils?
Nitrile rubber is recommended.
Tell us your detailed usage conditions and we can recommend the best type of rubber.
Is it possible to make custom-made molded products with Perfluor?
Yes, it is possible.
We have experience in making Perfluor diaphragms and other products. Perfluor is an excellent material with good solvent and chemical resistance and little outgassing. Tell us your usage conditions and we can recommend the best type of rubber. Please contact us.
Can you make thin rubber? We need a material that is 0.8 mm thick.
Yes, manufacturing is possible from 0.5 mm with silicone rubber.
We would like to apply grease when installing the O-ring. What type of grease should we apply?
Silicone-based grease is generally used for EPDM and butyl rubber, which have poor mineral oil resistance. Use mineral grease or silicone grease for NBR and FKM, which have excellent mineral oil resistance.
We would like to use the O-ring stretched. How much can it be stretched?
NBR, which is mostly used for packing, has poor weather resistance and cracks if left stretched. The time to crack decreases as elongation rate increases. The elongation rate at which problems are unlikely to occur during use is under 5%.
Is a thick O-ring better than a thin one?
If you have extra space in the O-ring groove, a thicker O-ring is recommended. The reasons for this are as follows:
(1) Thicker O-rings are difficult to twist when installing and using.
(2) They provide excellent recovery from strain due to stress.
(3) They have a longer life because degradation due to oxidation reaction starts from the surface of the rubber.