Sealed raw materials

NBR

Nitrile butadiene rubber (NBR)is a family of synthetic rubber copolymers of acrylonitrile and butadiene. Although its physical and chemical properties vary depending on the polymer’s composition of nitrile, this rubber types are generally resistant to oil, fuel, and other chemicals. Have long-term operating temperatures from-30°C to +100°C /-22°F to +212°F and up to 120°C / 248°F for short periods. Material code isER1.

HNBR :

  • Hydrogenated nitrile butadiene rubbers (HNBR) are saturated copolymers of acrylonitrile and butadiene, suitable for applications with aliphatic hydrocarbons, mineral oils. The physical and butadiene, suitable for applications with aliphatic hydrocarbons, mineral oils. The physical and chemical properties vary depending on the polymer’s composition. And operating temperatures from-25°C to +150°C material code isHER1. concrete and mortar.
  • It provides strength and durability to buildings.
  • Cement is widely used in houses, bridges, roads, and dams.
  • The most common type is Ordinary Portland Cement (OPC).
  • It helps bind sand, gravel, and bricks together.
  • Cement must be stored in a dry place to prevent damage.
  • It is an essential material in modern construction work.

Polyurethane(HPU) :

  • Is a hydrolysis-resistant polyurethane elastomer. It combines the engineering properties of polyurethane with a high resistance to abrasion & hydrolysis which is otherwise rarely found in polyurethanes. It is stable in water up to +90°C (hydrolysis is degradation water) resistant to mineral oils, greases, fire resistant HFAand HFBfluids and biologically degradable hydraulic fluids (vegetable oils and synthetic esters) And operating temperatures from-30°C to+110°C.

Viton :

  • FPM rubber is commonly known by DUPONT trade name Viton. The main characteristics of viton are that it is resistant to high temperature &their chemical stability. Also displays minimal weight loss in high vacuum &also, its permeability to gases is low. Viton is compatible to fire resistant hydraulic fluids, hot oils, greases, hydrocarbon, chlorinated hydrocarbons & most organic acids, even at high concentrations and with against a number of organic compounds. It has excellent resistance to hot water and steam. Viton however is not resistant to methanol, keytones, caustic soda, ethers, and low molecular organic acids, operating temperatures from-20°Cto +200°C, material code is ER2.

Silicon :

  • Silicon rubber is characterized by high thermal resistance good cold flexibility, good dielectric properties, and very good resistance to oxygen and ozone attack. The main advantage is that it retains flexibility at very low temperature and can withstand continuous heating without hardening, making it suitable for low and high temperature applications. Silicon compounds have poor strength and tear resistance. Their resistance to oils and fuels is poor. Concentrated acids and alkalis, water and steam at temperature over 100°C will destroy the material. Operating temperatures from-70°C to +200°C material code isVMQ.

Polytetrafluorethylene (PTFE):

  • PTFE is characterized by its outstanding resistance to chemicals and low co-efficient of friction combined with a very wide working temperature range. Only liquid alkaline metals and some fluoride compounds can attract PTFE at high pressures and temperatures. Depending on the temperature and the load, PTFE has a tendency to creep or cold flow, so not use pure PTFE for sealing components in hydraulic systems, with the exception of back-ups for o-rings for the majority of sealing tasks, only filled PTFE materials are used, reinforced with materials such as Bronze, Glass, Graphite & Carbons, Operating temperatures from-200°C to +260°C. Material code is EF1&EF2.

Polyacetal(POM):

  • Polyacetal it is used for making anti-extrusion rings, guide ring bushes, scrapers and other high precision rotating parts. One of the most important technical thermoplastics with very good precision rotating parts. One of the most important technical thermoplastics with very good mechanical properties, low water absorption and good chemical resistance, any mineral oil grease HFA, HFB&HFC fluids, Operating temperatures from-40°C to +120°C. Material code isETL.

Polyamide(Nylon):

  • Polyamide has good sliding properties which is used in guide rings and bearing components. This material is used instead of acetal for components from 250mm upwards. Ecomid absorbs up to 8% water, polyamide is resistance to mineral oil &greases, HFA, HFB &HFC fluids, Operating temperatures from- 40°Cto+100°C.Material code isEMD.

Peek(with 30%Glass filler):

  1. Peek has excellent resistance to various chemicals and hydraulic fluids. Its mechanical properties are moderate but have excellent heat stability. It can perform under continuous use temperature of 260°C Peek is very expensive compared to other engineering plastics, Operating temperatures+315°C.
 
 

Explanationsof abbreviations

  1. HFA: Fire resistant fluids, oil in water HFB: Fire resistant fluids, water in oil HFA: Fire resistant fluids, water / glycol HFD: Fire resistant synthetic fluid.
 
 

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