?Rubber seals mechanical seal failure reasons

??In the repair of mechanical seals, the reason is often leak causes seal failure. Rubber seals to correct assembly tolerances, which is necessary for the installation of the mechanical seal, but also must have the appropriate shaft rubber seals, such as surface roughness and the right size, but manufacturers rarely provide tolerance data, these data This is essential in terms of installation. (Rely on experience and common sense)

??There can cause a leak because the sealing surface will produce heat, so use rubber seals temperature should be below the design specifications. Viton and PTFE use temperature of 216 ?, the use of NBR temperature of 162 ?, although they can withstand higher temperatures, but the heat generated by the sealing surface is higher, so the rubber ring vulcanized to continue danger, loss of elasticity and eventually leak. (Considering the cold zone cold crisp)

??Insufficient cooling water can not even cooled mechanical seal, liquid film between the sealing surface vaporization occurs will cause the sealing surface wear and tear, the auxiliary rubber seals of aging and other issues. Sealed chamber temperature is too high, thermal softening ring seals, together with the sleeve, causing the ring can not float freely in the axial direction to compensate for wear or displacement of the movable ring, which is a large number of shaft seal leakage was the main reason for that splash .

??In order to ensure sealing performance, based on a failure of the auxiliary rubber seals analysis, secondary seal must have good flexibility, high temperature, o-ring seal with Viton seals. Since carbon graphite have the ability under good self-lubricating properties and high temperature operation, paired with hard alloy is better, so the static sealing surface retains carbon graphite, Viton static seals agreed.

??Also known as seal mechanical seal (Mechanical seal), a rotary shaft dynamic seal mechanical seal and reliable performance, small amount of leakage, long life, low power consumption without frequent maintenance, and the rubber seals can be adapted to produce and process automation high temperature, low temperature, high pressure, vacuum, high speed and a variety of corrosive media. medium containing solid particles and other harsh conditions of the sealing requirements.

??Mechanical rubber seals advantages:

??1) reliable sealing, long-term operation in a sealed state is very stable, very small leak, the leak of about 1% of soft packing seal:

??2) long life, oil, aqueous medium a mechanical seal generally up to 1 to 2 years or more in a chemical medium generally work more than six months:

??3) the seismic resistance of the seal chamber skew rotary shaft and the shaft vibration insensitive:

??4) apply a wide range of mechanical seals can be used for high temperature, low temperature, high pressure, vacuum, different rotation frequency, and a variety of corrosive media containing abrasive particles and the sealing medium.