Lateral Mechanical Seals And Pump Seal Can Also Play In The Maintenance Before The Sealing
With the community's health, safety and environmental protection more seriously
, no pressure to use the double Pump Seal the rise, and the kind of seal can be used in vinyl chloride, carbon monoxide, hydrocarbon and other toxic, volatile, dangerous medium. Non-pressure sealed inside a double seal (first seal) is the main Pump Seal, built the equivalent of a single face seal, the lubrication is sealed by the media to play. Fill cavity to seal to the sealed tank of liquid, not pressure. Once inside the seal failure, resulting in increased pressure on the sealed chamber, which can seal liquid from the tank pressure gauge display, recording, or alarm. Lateral seals can also play in the maintenance before the sealing and to accommodate the role of fluid leakage.
Some noxious particles medium (or very severe corrosive media), generally consider the following methods:
1. Adopt appropriate environmental control measures, such as external flush + with Cyclone flushing system piping.
2. With a double seal with pressure.
Built-in and externally mounted seal
Built-in seal: mechanical seal means installed in the seal cavity.
Exterior seal: mechanical seal means installed in the sealed cavity.
Built-in sealed because the force were better than the pressure increases with the increase of media pressure, the leakage direction of centrifugal force in the opposite direction, so generally all use built-in mechanical seals.
Only when highly corrosive media when, and because they do not want to consider a double seal with pressure only when considering the selection of exterior mechanical seal.
Rotating and static mechanical seal
Rotary mechanical seal ring with the axis compensation with that of the mechanical seal rotating.
Static seal ring that compensation is not rotating with the shaft with mechanical seal.
In addition, a strong agitation if the media easier by crystallization, also recommended static mechanical seal.
Single-and multi-spring mechanical seal spring
Single spring mechanical seal, a simple structure, can spring from the drive and the role, but the face than the pressure differential, does not apply to high-speed operation.
Multi-spring mechanical seal, complex structure, and from the drive spring can not function, but the face than the pressure even for high-speed operation.
In general, multi-spring mechanical seal recommended use. If API682 clearly the standard push-type seal as many springs.
A brief introduction to API 682 standard
The purpose of the preparation of the standard as follows:
1. To meet the environmental protection agency under the conditions of leakage, required mechanical seal for at least 3 years continuous operation cycle.
2. Streamlined seal species, providing a set of options for at least the seal selection process, to ensure a reliable seal selection, and lower inventory and maintenance costs.
API682 standard, as follows:
1. All the standard mechanical seal shall be in cartridge design. But the hook type sleeve assembled structure, API682 not as container seals, cartridge seals should be able to assembly and disassembly without moving motor.
2. Standard, there are three types of mechanical seals.
Type A, sliding multi-spring seal
Type B, low rotating bellows seal
Type C, high temperature stationary bellows seal
by: selina00123
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Lateral Mechanical Seals And Pump Seal Can Also Play In The Maintenance Before The Sealing