Engine Parts NBR Viton HNBR O-Ring Seal Kit Box Repair

Model NO.: 03
Name: O-Ring
Rubber: Silicon,NBR,PU,PTFE,FKM Ect.
Working Medium: Lubricant,Oil,Water
Color: Blue,Brown,Black or Other Colors You Need
Size: Any Size
3D/CAD Drawing: Accept
Hardness: 50~ 90 Shore a
Function: Anti Water and Oil
Service: OEM or Stock
Trial Order: Acceptable
Trademark: SAIXUAN
Transport Package: PP Bag/Cartons or Customized
Origin: Hebei China
Detail Silicon o-ring seal kit
Material NBR and NBR cloth
(Temperature<100ºC)		 Working
Temperature		 NBR
(-30ºC~ +100ºC)
FKM and FKM cloth
( Temperture>180ºC)		 FKM
(-20ºC~  +250ºC)
Tensile Strength NBR (14 Mpa)
FKM (12Mpa)
Hardness 50~90 shore A
Working Medium Lubricant, oil, water
Color Black or other colors you need
Size Customize
3D/CAD drawing Accept
Usage Used in static applications or in dynamic applications where there is relative motion between the parts and the O-ring
Scope Rotationg pump shafts, Hydraulic cylinder piston
Shipping DHL, UPS, FEDEX, TNT, air freight, sea shipping or based on customer arrangement

Description
Product group: OR O-rings
Material
NBR 70   
Colour
NBR 70, black
Tolerances: as per DIN 3771 / ISO 3601
Materials with approvals and/or conformity tests for special applications (gas, drinking water, foodstuffs) are available, as required.

Operational application limits 
Temperature EPDM 70: -45 °C to +130 °C
Temperature FKM: -15 °C to +200 °C
Temperature HNBR 70: -30 °C to +150 °C
Temperature NBR: -30 °C to +100 °C
Temperature VMQ 70: -55 °C to +200 °C

Function
O-rings are closed circular rings of circular cross-section. They are made through vulcanisation from form tools as a complete ring. The sealing function of the O-ring is achieved by the deformation of the cross-section when installed and compressed in its housing. The O-ring can be compressed either radially or axially in its installation housing. In operating conditions the pressure exerted by the media reinforces the sealing function, as under pressure the elastomer material functions as a non-compressible fluid.

Applications
O-rings are used predominantly for sealing non-moving machine and system components (static application) and media in liquid and gas form, e.g. flange and cover seals, threaded tube connections and the cylinder head and cylinder bottom for hydraulic cylinders. Under certain conditions it is also possible to use O-rings with reciprocating, rotating and helical movements (dynamic application). If the installation housing is finished properly, the construction design is right and the proper materials are selected, it is possible for pressures of up to 1000 bar to be sealed, with the use of back-up rings, where required. O-rings are used in many sectors, such as the fields of hydraulics, pneumatics, vacuum applications, the fittings industry, the automotive industry and in plant and mechanical engineering.

Installation housings
The installation housings (grooves) for O-rings should if possible be produced with right angles and should be processed with care. Burrs, scratches and notches should be avoided. The dimensions for the required depth and width of the groove depend on the particular application and cross-section. You will find recommendations for construction and dimension tables in our O-Ring Catalogue. To facilitate installation, a variety of surface coatings can be supplied on application.

Selection and design 
To ensure sound sealing effect, O-rings should be selected to offer the largest possible cross-section. The hardness of the O-ring material selected depends on the pressure, gap widths, type of sealing (static/dynamic) and the surface quality of the machine parts. For standard applications we recommend a material hardness of 70 Shore A. Careful consideration should also be given to the correct compression, elongation or compaction and the degree to which the groove in the installation housing is filled.

Suitability for specific media
EPDM
Good resistance to hot water and steam, detergents, caustic potash solutions, silicone oil and greases, many polar solvents, and many diluted acids and chemicals, along with a high level of ozone resistance. EPDM materials are totally unsuitable for use with all mineral oil products (lubricants, fuels).

FKM
Good chemical resistance to mineral oils and greases, synthetic oils and greases, engine, transmission and ATF oils to approx. +150°C, fuels, non-flammable hydraulic pressure fluids HFD, aliphatic, aromatic and chlorinated hydrocarbons, water to max. +80°C, excellent resistance to weathering, ozone and ageing, very low gas permeability (and therefore excellent for vacuum application) and resistance to a wide range of chemicals.

HNBR
HNBR is obtained by fully or partially hydrogenating NBR. It leads to considerable improvement in resistance to heat, ozone and ageing, and gives it very good mechanical properties, e.g. good resistance to wear. The media resistance compares to that of NBR. HNBR has a good resistance to some refrigerants. The temperature application range is from -30°C to +150°C.
NBR
Good chemical resistance to mineral oils and greases, hydraulic oils H, HL, HLP, non-inflammable hydraulic pressure fluids HFA, HFB, HFC to approx. +50°C and water to max. +80°C 

VMQ
Good resistance to water (up to 100 °C), aliphatic engine and transmission oils, animal and plant oils and fats. VMQ is generally not resistant to fuels, aromatic mineral oils, steam (short term up to 120 °C possible), silicone oils and greases, acids and alkaline compounds.

Installation
Avoid damaging the O-ring during installation, as this will cause leakage. Observe the following:
-  The O-ring must not be expanded to its elongation limit.
-  Edges must be burr-free, radii and angles applied smoothly.
-  Dust, dirt, metal chips and other particles must be removed.
-  Tips of screws and installation housings for other sealing and guiding elements should be covered by an assembly sleeve.
-  A suitable grease to be applied to the assembly surfaces and O-rings.
-  Elastomer materials are made smoother if they are heated in oil or hot water to approx. 80 °C. This makes it easier to stretch the O-ring for assembly.
-  Any assembly tools used, such as expansion mandrels or sleeves, should be made of a soft material (e.g. POM) and not have any sharp edges.
-  The O-ring should not be rolled over assembly surfaces. Ensure the O-ring is not twisted as it slots into the groove.
Engine Parts NBR Viton HNBR O-Ring Seal Kit Box RepairEngine Parts NBR Viton HNBR O-Ring Seal Kit Box RepairEngine Parts NBR Viton HNBR O-Ring Seal Kit Box Repair
 

Standard Injection Molding Machine

1. Injection Molding Machine equipment function



â‘  According to the properties of the raw materials used for the products, the screw forms of different structures suitable for the plasticizing conditions can be selected and replaced.



â‘¡ According to the plasticizing conditions of raw materials for products, there should be a stable heat source for heating.



â‘¢ According to the requirements of the product forming quality, the accuracy of the primary feeding quantity shall be guaranteed.



â‘£ In order to ensure the plasticizing quality of raw materials, the screw should have an adjustable and stable back pressure when working.



⑤ According to the needs of different raw materials for post-melting molding, the injection pressure and melt flow rate required by the process shall be available when injecting molten materials into the mold.



â‘¥ The clamping force of the mold during molding is greater than the expansion force of the molten material injected into the mold cavity.



⑦ Control the cooling and solidification molding speed of the molten material in the mold cavity with appropriate mold temperature.



⑧ The molten material flow channel in the forming mold is smooth, and the mold cavity has a certain release angle. According to the structure and shape of the product, the product ejection device shall be set in the molding mold if necessary.



Functions and characteristics of injection molding machine



2. Characteristics of injection molding products



â‘  Various plastic products with complex shapes can be formed at one time.



â‘¡ The structure and mutual position size of the molded parts can be guaranteed, and the surface quality of the products is good.



â‘¢ The structure shape and size of each part of the product can be different, which can ensure the mutual position of the product and the accuracy requirements of the structure size, and the product can have good assembly interchangeability.



â‘£ Plastic products with metal inserts can be injection molded.



⑤ Injection molded parts can be standardized, normalized and serialized.



â‘¥ The production operation of the injection molding machine is relatively simple, and the adjustment and update of the molding mold are relatively convenient.



⑦ The injection molding machine adopts fully automatic production of plastic products, with high production efficiency.



⑧ The investment in injection molding equipment is relatively large, and the manufacturing cost of molds for molding is relatively high. The process conditions for injection molding of molded products need to be strictly controlled.

Standard Injection Molding Machine,Ce Standard Injection Molding Machine ,Standard Injection Machine,Plastic Injection Machine

Ningbo Chenwei Machinery Technology Co.,Ltd , https://www.chenweimachine.com