German MADER seals MADER model MADER price

MADER seals are sealing devices installed to prevent leakage between the pump shaft and the housing. Common shaft seal types include packing seals, mechanical seals, and power seals. The shaft seal of a reciprocating pump is usually a packing seal. When transporting media where leakage is not permitted, a diaphragm reciprocating pump can be used. The shaft seals of rotary pumps (including vane pumps, rotor pumps, etc.) mainly consist of packing seals, mechanical seals, and power seals. The shaft seal of a reciprocating pump is usually a packing seal. When transporting media where leakage is not permitted, a diaphragm reciprocating pump can be used. The shaft seals of rotary pumps (including vane pumps, rotor pumps, etc.) mainly consist of packing seals, mechanical seals, and power seals.

MADER seal construction

The skeleton oil seal structure consists of three parts: the oil seal body, the reinforcing skeleton, and the self-tightening helical spring. The sealing body is divided into the bottom, waist, cutting edge, and sealing lip according to different parts. Usually, in the free state, the inner diameter of the skeleton oil seal is smaller than the shaft diameter, meaning it has a certain "interference fit." Therefore, after the oil seal is installed on the oil seal seat and shaft, the pressure from the oil seal cutting edge and the contraction force of the self-tightening helical spring generate a certain radial tightening force on the shaft. After a period of operation, this pressure will rapidly decrease or even disappear; thus, the spring can compensate for the oil seal's self-tightening force at any time.

MADER seal usage instructions

1) When the gearbox lubricating oil volume is ≤7 liters, the additive amount per liter of lubricating oil is 20‐30ml; 2) When 7‐15 liters, the additive amount is 15‐20ml per liter of lubricating oil; 3) When >15 liters, the additive amount is 10ml per liter of lubricating oil; 4) Oil seals that are not temporarily used should be stored properly to prevent contamination with oil stains, dust, or exposure to sunlight. 5) When the shaft diameter wears into a "V" shaped groove, causing the contact pressure between the new oil seal lip and the shaft to drop and fail to seal oil, the displacement method can be used for compensation.

MADER seal common questions

Zero leakage is the perpetual pursuit for chemical equipment sealing, and this requirement has promoted the increasingly widespread application of magnetic drive pumps and canned motor pumps. However, there is still a long way to go to truly achieve zero leakage, such as the service life issues of magnetic drive pump isolation sleeves and canned motor pump shielding sleeves, material pitting corrosion issues, the need for corrosion-resistant high-quality sealing materials, and the reliability issues of static seals, etc. A brief introduction to some basic situations regarding sealing is as follows: 1. Sealing forms For static seals, there are usually only two forms: gaskets and O-rings, with O-rings being the most widely used; for dynamic seals, chemical pumps rarely use packing seals, relying mainly on mechanical seals. Mechanical seals are further divided into single-face and double-face, balanced and unbalanced types. Balanced types are suitable for sealing high-pressure media (usually referring to pressures greater than 1.0MPa). Double-face mechanical seals are mainly used for media that are high-temperature, prone to crystallization, viscous, contain particles, or are toxic and volatile. Isolation fluid should be injected into the seal chamber of double-face mechanical seals, with a pressure generally 0.07～0.1MPa higher than the medium pressure. 2. Sealing materials Static seals for chemical pumps generally use fluororubber, with PTFE materials used only in special cases; the material configuration of the rotating and stationary rings in mechanical seals is critical. It is not necessarily best to pair cemented carbide with cemented carbide; high cost is one aspect, and it is also unreasonable if there is no hardness difference between the two. Therefore, it is best to treat them differently based on the characteristics of the medium (Note: The American Petroleum Institute API610 Eighth Edition has relatively detailed provisions for typical configurations of mechanical seals and piping systems in Appendix D).

Weidou Intelligent Technology specializes in selling German MADER seals, MADER O-rings, MADER sealing strips, MADER pipe seals, MADER cable seals, MADER rubber seals, MADER mechanical seals, MADER gaskets, MADER oil seals, MADER shaft seals, MADER metal seals, MADER high-pressure seals, MADER spiral seals, MADER centrifugal seals, MADER sealing rings, MADER original imports from Germany. Welcome customers to inquire and order.