Welcome To Mech Spares Private Limited
Normally infusible, coloured (often amber) high performance polymers with predominantly aromatic molecules of high thermal stability. Semi-fabricated shapes are usually supplied by the polymer manufacturer and made by powder sintering or working with more tractable pre-cursors and completing polymerization in final form, though some melt-process able grades of resin are manufactured.
They have excellent high temperature properties and radiation resistance, inherently low flammability and smoke emission, low creep and high wear resistance and are very expensive. They have moderately high water absorption and are prone to hydrolysis and attack by alkalis and concentrated acids.
|General Properties :|
|Acids – concentrated||Poor|
|Acids – dilute||Fair|
|Greases and Oils||Good|
|Dielectric constant @1MHz||3.4|
|Dielectric strength ( kV mm-1 )||22|
|Dissipation factor @ 1kHz||0.0018|
|Surface resistivity ( Ohm/sq )||10 16|
|Volume resistivity ( Ohmcm )||10 18|
|Coefficient of friction||0.42|
|Elongation at break ( % )||08 to 70|
|Hardness – Rockwell||E52 to 99|
|Izod impact strength ( J m -1 )||80|
|Tensile modulus ( GPa )||2.0 to 3.0|
|Tensile strength ( MPa )||70 to 150|
|Density ( g cm-3 )||1.42|
|Limiting oxygen index ( % )||53|
|Resistance to Ultra-violet||Poor|
|Water absorption – over 24 hours ( % )||0.2 to 2.9|
|Coefficient of thermal expansion ( x10-6 K-1 )||30 to 60|
|Heat-deflection temperature – 1.8MPa ( C )||360|
|Lower working temperature ( °C )||-270|
|Specific heat ( J K-1 kg-1 )||1090|
|Thermal conductivity @23C ( W m-1 K-1 )||0.10 to 0.35|
|Upper working temperature ( C )||250 to 320|
"ONGC - Oil and Natural Gas Corporation Limited" - Our complex drilling application where Shaft was eccentric and application was robust & muddy. Replacement was never easy. Mech Spares designed Oil seals resolved difficulty. This gave a complete joy to my maintenance team.
"Mr Mohammed Al Duaigy" of (Kuwait National Petroleum Company) : We tried several diaphragms from renown worldwide Rubber manufacturing companies. We found Mech Spares technical know how and product to be of great durability and lasted 3 times more then anticipated. They have accurate understanding of there products.
"McCafferty BM Design Ltd, KENT United Kingdom" - Most of the O rings manufacturing company suggested to use larger diameter and expensive elastomers. We learnt with Mech Spares that elastomer being weaker compare to metal and alloys and needs appropriate back up for high pressure or high vacuum applications. Further not necessary the most expensive elastomer is the best for all applications. We trust Mr Nilesh chodhari completely for all our O rings designing applications.
"Dr. A. Singh" of BARC: The electric Insulation mat manufactured by MECH SPARES as per IS 15624 tested at ERTL and found to withstand 40 Kv and still didn't tear. We have been using since 5 years and still didn't generate any fatigue. They arranged bulk delivery in short period.
"Tata Steel" - One of our old machines started making loud noise and disturbed the entire village. We were compelled to stop the machines which lead to huge production loss. With the help of Mech Spares designed bellows in two part we could retain the lubrication and eliminate the noise.
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