DMS SEALS TECHNOLOGY CO.,LIMITED

DMS Seals-Mechanical Seals and Oil Ring Seals Manufacturer

The Professional Sealing Solution Supplier(O Ring Suppliers & Oil Seal Manufacturers).

Mail to: sales@dmsseals.com

TEL:+86-757-86235767

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Home  > PRODUCTS  > O-Ring kits  >  FOR KOBELCO MODELS OR-KIT015 NBR90 689PCS
FOR KOBELCO MODELS OR-KIT015 NBR90 689PCS

FOR KOBELCO MODELS OR-KIT015 NBR90 689PCS

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Product Description
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1. Performance and use

O-rings are the most used seals in actual production and life, which can seal one-way pressure, two-way pressure or alternating pressure.

It is mainly used for static seals, and a small part of dynamic seals (often pneumatic reciprocating motion) are also used. In dynamic applications, it is only recommended for better conditions. In rotary motion, if the pressure is low and the lubrication is sufficient, it can be recommended.

The service life of O-rings depends on factors such as system lubrication, pressure, temperature, sealing gap, speed, medium and surface quality of metal parts.

Wide range of materials, all kinds of rubber, plastic and even metal can be used as O-ring seal materials. Therefore, its medium adaptability and temperature adaptability are extremely wide.

Small mounting groove size.

Simple structure and low price.


2. Materials

Now the commonly used materials are NBR (butadiene rubber) and FKM (fluorine rubber). NBR is used for ordinary working conditions, mainly oil-proof and waterproof; FKM is mainly used for working conditions with high temperature (<160°C).

3. Performance parameters



Static sealDynamic seal
Work pressureWithout retaining ring, up to 10MPa; with retaining ring, up to 40MPa; with special retaining ring, up to 200MPa;When there is no retaining ring, the maximum pressure can reach 0.5MPa; when there is a retaining ring, the maximum pressure is 1MPa.
Movement speed-The maximum reciprocating speed can reach 0.3m/s, and the maximum rotation speed can reach 2.0m/s.
TemperatureNitrile rubber NBR: -30℃~110℃; Fluorine rubber FKM: -20℃~160℃


Product Parameters



OR-KIT015 NBR90 689PCS
19.25*1.78202817.8*2.415
210.82*1.78202919.8*2.415
312.42*1.78203020.8*2.415
414*1.78203121.8*2.415
54.8*1.9103223.47*2.9510
65.8*1.9103324.4*3.112
76.8*1.9153429.4*3.112
87.8*1.9203534.4*3.112
98.8*1.9153639.4*3.110
109.8*1.9153744.4*3.18
1114*2203849.4*3.18
1216*2203921.7*3.511
1318*2204022.1*3.511
1421*2154123.7*3.514
1522*2104224.7*3.511
1625*2104325.7*3.511
1727.5*2104427.7*3.511
1828*2104528.7*3.515
1938.5*2104629.2*3.510
2049.5*2104729.7*3.511
219.8*2.4104831.7*3.511
2210.8*2.4204933.7*3.511
2311.8*2.4155034.7*3.510
2412.3*2.4105135.7*3.55
2513.8*2.4155237.7*3.510
2614.8*2.4155347.7*3.55
2715.8*2.415


Remarks: The total number of O-rings is 689 pieces, the ones marked with colors are fluorine-sprayed O-rings


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