About motorized valve sealing material

EMPD full name is ethylene-propylene-diene misch-polymere ; NBR full name is nitrile -butadiene rubber, it's better oil resistance; FKM full name is fluorine rubber.

The actuator on tonhe cover and sealing materials for staff plastic, own mould.

Modern hydraulic, pneumatic seals, the general requirements of the sealing material below:

(1) the density is good, and it is not easy to leak the medium.

(2) with proper mechanical strength and hardness.

(3) in the working medium has good chemical stability, the working device of hydraulic oil and lubricating oil has a certain tolerance, not swollen, do not shrink, do not soften, do not harden.

(4) compression and resilience are good, permanent deformation is small, can eliminate the gap caused by eccentric piston or piston rod.

(5) has a certain temperature adaptability, high temperature does not soften, does not decompose, low temperature does not harden, not brittle crack.

(6) good corrosion resistance, in acid, alkali, oil and other medium can work for a long time, its size and hardness change is small, and does not adhere to the metal surface.

(7) the friction coefficient is small, and the wear resistance is good.

(8) with the sealing surface of the combination of flexibility and flexibility.

(9) ozone resistance and good ageing resistance, durable.

(10) the manufacture is convenient, the price is cheap, the material is easy.

Tonhe motorized valve requires the sealing material can meet some special requirements of the environment,
Silicone rubber sealant can resist high temperature and low temperature such as vacuum resistance, radiation resistance, non pollution, non-toxic, high and low temperature resistance and resistance to the aviation fuel and rocket propellant medium corrosion.


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