German eisenhuth seals eisenhuth models eisenhuth prices

eisenhuth 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 hydrodynamic 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 hydrodynamic 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 hydrodynamic seals.

eisenhuth seal principle

A mechanical seal is a shaft sealing device that achieves leak prevention by maintaining contact between one or more pairs of end faces sliding relative to each other perpendicular to the shaft, under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism, supplemented by auxiliary seals. A common mechanical seal structure consists of components such as a stationary ring (static ring), a rotating ring (dynamic ring), an elastic element spring seat, set screws, an auxiliary O-ring for the rotating ring, and an auxiliary O-ring for the stationary ring. An anti-rotation pin is fixed to the gland to prevent the stationary ring from rotating. The rotating ring and stationary ring can also be referred to as compensation rings or non-compensation rings, depending on whether they have axial compensation capability.

eisenhuth seal system composition

1) Seal chamber: In the past, seal chambers housing mechanical seals were stuffing boxes designed for soft packing seals. They are unsuitable for housing mechanical seals, not only because the dimensions are too small and the clearances too narrow, but also because the simple cylindrical shape is inappropriate. Standards for enlarged mechanical seal chambers have been established abroad. In addition, Durametallic Corporation in the United States and the Fluid Sealing Association (formerly the British Fluid Power Association's research group contextually implies FSA or similar body, but source says 'British Fluid Mechanics Research Group') are researching rational mechanical seal chamber designs. Their shapes should not only facilitate fluid flow and heat dissipation but also help remove solid particles, creating a favorable environment for the seal. 2) Volatile organic compound (VOC) emission control system: In the past, attention was focused only on eliminating visible fluid leaks, while invisible volatile emissions were neglected, resulting in environmental pollution and hazards to equipment and personnel. Organizations abroad, such as the Sealing Technology Committee of the Society of Tribologists and Lubrication Engineers (STLE) in the United States, have formulated guidelines for controlling volatile emissions from rotating machinery with mechanical seals, compressors, and screw systems according to SP-30 (1994), SP-32 (1990), and SP-33 (1991). SP-30 is implemented in three stages. It clearly defines barrier fluids and buffer fluids, clarifying erroneous and confused concepts. A barrier fluid is introduced between dual seals to completely block process fluid from leaking into the surrounding environment. The pressure of the barrier fluid is always higher than the pressure of the sealed process fluid. A buffer fluid is used between dual seals as a lubricant or buffer; its pressure is always lower than that of the sealed process fluid. 3) Auxiliary system integration: Mechanical seal auxiliary systems require integration of cooling, heating, and flushing systems. Pump circulation needs optimization, and condition monitoring systems are being studied and resolved. The integration of auxiliary systems is specified in the API-682 standard. 4) Gas barrier seal system: In the past, liquid-blocking-liquid or liquid-blocking-gas configurations were common in barrier seal systems. To simplify bulky barrier liquid systems, barrier gases are now used to block liquids or gases. Gas barrier seal systems may employ spiral groove gas seals with barrier gas, floating bushings with barrier gas, etc., to seal against gases and liquids.

eisenhuth seal precautions

1) Shaft speed: Due to design and structural reasons, high-speed shafts should use high-speed oil seals, and low-speed shafts should use low-speed oil seals. Low-speed oil seals must not be used on high-speed shafts, and vice versa. 2) Ambient temperature: In high-temperature operating conditions, select polyacrylate, silicone, fluorocarbon, or fluorosilicone rubber. Measures should be taken to reduce the oil temperature in the tank. In low-temperature operating conditions, select cold-resistant rubber. (3) Pressure: Standard oil seals have poor pressure resistance; excessive pressure causes deformation. Under high-pressure conditions, use pressure-resistant support rings or reinforced pressure-resistant oil seals. 4) Installation eccentricity: Excessive eccentricity between the oil seal and the shaft deteriorates sealing performance, especially at high shaft speeds. If eccentricity is excessive, use oil seals with a "W" cross-section. 5) Shaft surface finish: This directly affects oil seal service life; higher shaft surface finish results in longer oil seal life. 6) Ensure a certain amount of lubricating oil is present at the oil seal lip. 7) Take special care to prevent dust from entering the oil seal.

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