Germany METAX seals METAX models METAX prices

METAX seals are sealing devices installed to prevent leakage between the pump shaft and the housing. Common types of shaft seals 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 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 include packing seals, mechanical seals, and power seals.

METAX seal principle

Since there is an oil film controlled by the oil seal lip edge between the oil seal and the shaft, this oil film has fluid lubrication characteristics. Under the action of liquid surface tension, the stiffness of the oil film just forms a meniscus at the end where the oil film contacts the air, preventing the leakage of the working medium and thus achieving the sealing of the rotating shaft. The sealing capability of the oil seal depends on the thickness of the oil film on the sealing surface; if the thickness is too large, the oil seal will leak; if the thickness is too small, dry friction may occur, causing wear on the oil seal and the shaft; if there is no oil film between the sealing lip and the shaft, it is easy to cause heating and wear. Therefore, during installation, some oil must be applied to the sealing ring, and it must be ensured that the skeleton oil seal is perpendicular to the shaft centerline. If it is not perpendicular, the sealing lip of the oil seal will drain the lubricating oil from the shaft, which will also lead to excessive wear of the sealing lip. During operation, it is ideal for a slight amount of lubricant in the housing to seep out slightly to achieve the state of forming an oil film at the sealing surface.

METAX seal function

The function of a skeleton oil seal is generally to isolate the components requiring lubrication in the transmission parts from the output parts, so that the lubricating oil does not leak. It is usually used on rotating shafts and is a type of rotating shaft lip seal. The skeleton acts like steel reinforcement in concrete components, providing reinforcement and enabling the oil seal to maintain its shape and tension. According to the skeleton type, it can be divided into inner skeleton oil seals, outer skeleton oil seals, and exposed inner and outer skeleton oil seals. Skeleton oil seals are made of high-quality nitrile rubber and steel plates, with stable quality and long service life. They are widely used in automobiles, motorcycle crankshafts, camshafts, differentials, shock absorbers, engines, axles, front and rear wheels, and other parts. 1) Prevent sand, dust, water vapor, etc. from invading the bearing from the outside; 2) Limit the leakage of lubricating oil from the bearing. The requirements for oil seals are that the dimensions (inner diameter, outer diameter, and thickness) should comply with regulations; appropriate elasticity is required to properly clamp the shaft to achieve a sealing effect; they must be heat-resistant, wear-resistant, have good strength, be resistant to media (oil or water, etc.), and have a long service life.

METAX seal installation technical requirements

Mechanical seals are high-precision mechanical components, and their correct installation and operation have a significant impact on their service life. We generally follow the standards specified by the Ministry of Petrochemical Industry. The technical requirements for the pump installing the mechanical seal and the parts mating with the mechanical seal are as follows: 1) Shaft bending: maximum not greater than 0.05 mm; 2) Rotor runout: near the shaft sleeve at the dynamic ring sealing ring, not greater than 0.06 mm; 3) Axial movement of the shaft is not allowed to exceed ±0.5 mm; if there is a shaft sleeve, the shaft sleeve is not allowed to be loose; 4) Coupling alignment error: for gear couplings, not greater than 0.08～0.10 mm (P2008C); for elastic couplings, not greater than 0.05～0.06 mm; (customary practice face runout<0.05, radial runout<0.10) 5) The concentricity tolerance of the gland (static ring seat) and the sealing mating spigot relative to the shaft centerline is 0.05 mm, and the perpendicularity tolerance of the plane contacting the gasket relative to the centerline is 0.03～0.05 mm. If the requirements are not met, the seal chamber must be machined; 6) The ends of the shaft sleeve where the dynamic ring sealing ring is installed, and the ends of the gland (or housing) where the static ring sealing ring is installed, should be chamfered and smoothed. 7) Be careful when installing and removing mechanical seals; strictly prohibit the use of hammers and flat chisels to avoid damaging the sealing elements. If scaling prevents removal, clean thoroughly before disassembly. 8) If mechanical seals are used on both ends of the pump, take care of each other during assembly and disassembly to prevent neglecting one aspect for another. 9) For mechanical seals that have been in operation, if the gland becomes loose causing the seal to shift, the dynamic and static ring parts must be replaced and should not be retightened for continued use. Because after loosening, the original operating trajectory of the friction pair will change, and the sealing performance of the contact surface is easily compromised.

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