Home > News > Content
Long Service Life Of Water Pump Seals
Jul 28, 2017


The water pump seal has what characteristic, below to introduce in detail.

1) Good sealing performance, pump seal leakage of a muscle of 0.01~5ml/h, according to special requirements, after a special design, the leakage of water pump seals is only 0.01ml/h, or even smaller, while the packing seal leakage is 3~80/h (according to me, when the axle diameter is not less than 50mm, when the axle diameter is greater than the 3ml/h). 50mm is less than or equal to 5ml/h).

(2) long service life, the general use of more than 8000h.

(3) The friction power is small, only the packing seal $number.

(4) The shaft and the sleeve and seals this does not have the relative movement, Pump Seal will not produce the friction, the same with the sleeve use period is long.

(5) Pump sealing surface perpendicular to the pump axis, pump shaft vibration when the seal at any time to produce displacement, so the vibration in a certain range, Pump Seal still can maintain good sealing performance.

(6) Water pump seals rely on the pressure of sealing fluid and the role of spring force, maintain static, dynamic ring sealing surface, and rely on the spring force to compensate for wear, so once the deployment is appropriate, the pump in operation generally do not need regular adjustment, easy to use, maintenance work small.

(7) A wide range of operating conditions can be used for high-temperature, low-temperature, high-pressure, high speed and strong corrosion conditions.

(8) Trouble shooting and parts replacement is inconvenient, can only be repaired after parking.

(9) Complex structure, high assembly accuracy, Pump Seal assembly and installation of a certain technical requirements.

(10) High manufacturing price.

What are the types of sealing methods of water pumps?

Commonly used sealing methods are packing seals, mechanical seals and power seals.

1. Packing Seal

Packing sealing structure is simple, cheap, convenient maintenance, but the leakage of large, power loss. Therefore, packing seals are used for conveying general media, such as water, Pump Seal and generally not suitable for petroleum and chemical media, especially in expensive, explosive and poisonous media. The pump with packing seal mainly has: is type single-stage single suction centrifugal pump, screw pump, horizontal multistage centrifugal pump and so on, now these kinds of pumps can be made into mechanical sealing device products, to avoid the phenomenon of packing sealed with dripping liquid.

2. Pump Mechanical Seal

Pump mechanical Seals (also known as end-face sealing) of the sealing effect is good, leakage is very small, long life, but the price is expensive, processing and installation of maintenance than the general requirements of high sealing.

The pump mechanical seal is suitable for transporting petroleum and chemical medium, which can be used in various viscosity, strong corrosive and granular media. Pump Seal The American Petroleum Society standard stipulation, except the user has the stipulation, should equip the packing type mechanical seal.

3, Pump Power seal

Power seals can be divided into back-vane seals and auxiliary impeller seals two categories. The centrifugal force of the back vane (or the auxiliary impeller) of the pump work is that the pressure of the shaft seal is lowered to normal or negative pressure, so that the pump does not leak during the use. Pump Seal When the centrifugal force disappears when stopping, the sealing effect of the back vane (or the auxiliary impeller) is invalid, then the sealing device of the parking seal is used.