A Single Spring Mechanical is used in plumbing, manufacturing and other high-pressure applications. These devices offers sealing between other devices, including compressors, stationary pumps and spinning shafts. When used in tandem, the mechanical seal provides the protection needed for the rest of the mechanical device and its fluids to work together seamlessly.
A single-spring mechanical seal uses only one spring that is coiled in either a right- or left-handed design. The spring is set up to accommodate either left- or right-hand turning pumps. The seal has the flexibility needed to accommodate misalignment, break away shock loading and prevent clogging when using fluids with a high viscosity. A Muti Spring Mechanical Seals uses more than one spring that is coiled using a balanced design.
1 Turn off the main source to the pipe that you are sealing.
2 Disconnect the pipes that you are sealing from one another using the wrench.
3 Dry the pipes that you will be sealing completely, using the towel.
4 Place a 1/8-inch thick layer of liquid sealant over the threads of the pipe you are sealing.
5 Screw the pipes together again using the wrench.
6 Wipe away any extra liquid sealant with the towel.
7 Wait for five minutes until the liquid sealant has dried, after which you can turn the pipe’s source back on.
The article comes from Mechanical Seals.

1 shaft deflection is too large
Mechanical Seal, also known as seal is a contactless axial rotation dynamic seal, which is in fluid media and the role of elastic components, the two lines perpendicular to the axis of the seal face tight fit, the relative rotation, so as to achieve sealing effect, thus requiring the force to be between two evenly sealed. However, due to improper design pumps, pump operation, the mechanical seal installed at large deflection, the sealing surface of discontinuity between, resulting in good sealing effect.
2 No secondary or auxiliary irrigation system flushing system set unreasonable
Auxiliary Mechanical Seals flush system is very important, it can effectively protect the sealing surface, play a cooling, lubrication, wash away debris and so on. Sometimes there is no rational designer to configure a secondary wash system, fail to seal; sometimes to assist system designers to design, but because there are impurities in the fluid, fluid flow, the pressure is not enough, rinse the mouth position and unfair reasons for designed , also fail to seal.
3 vibration is too large
Mechanical Pump Seal vibration is too large, resulting in loss of sealing effect. However, too large vibration causes mechanical seal mechanical seal itself is often not the reason, the other pump parts is the source of vibration, such as unreasonable shaft design, processing reasons, lack of precision bearings, couplings parallelism is poor, radial force and other reasons.
4 reasons for pump cavitation
As the device operating system and the pump inlet unreasonable poor cavitation performance, high speed pump, localized in the entrance to the pump cavitation, cavitation occurs, the water will bubble, it will impact on the one hand, the mechanical seal faces the outer surface, so surface damage; the other hand, the ring will fit side movement the flow membrane also contains air bubbles can not form a stable flow membrane, resulting in movement of the ring surface dry friction fit, so that the mechanical seal damage.
5 lack of precision machining
Machining accuracy is not enough, for many reasons, some precision mechanical seal itself is not enough reason for this is easy to arouse people’s attention, but also easy to find. But sometimes other parts of the pump is not enough precision, the reasons for this, is not easy to arouse people’s attention. For example: shaft, bushings, pump, seal cavity to increase the accuracy is not enough other reasons. For these reasons the existence of mechanical seal sealing effect is very negative.
The article comes from Mechanical Seal Factory.