Oil seals are functional parts used to seal oil. Composed of synthetic rubber, metal rings and springs, they prevent the leakage of lubricants from gaps within machines and bearings. They also prevent the entry of dust from the outside.

O-rings are O-shaped ring packings. They are appropriately compressed by fitting into grooves, and prevent leakage of various fluids, including oil, water, air and gas.

"Packing" is a collective term for sealing devices that are mounted on the moving parts of hydraulic, pneumatic, and water-pressure equipment.

Accumulators utilize the compressibility of gas, Feature greater energy efficiency, safety and less noise.

NOK Iron Rubber belts are with superior mechanical strength, abrasion-resistance, Oil resistance and weather-ability.

NOK Polymer membrane-based modules are designed for good filtration accuracy, fluid flow, operational lifetime, and resistance to pressure, chemical resistance, and distortion, thus boasting high reliability.