German westring seals westring models westring prices

westring seals are a type of friction seal or stuffing box used to prevent liquid leakage between the shaft and bearings of compressors or other fluid transport equipment. They are also sealing devices designed to prevent leakage at the pump shaft and housing. Common types of shaft seals include packing seals, mechanical seals, and dynamic seals. The shaft seal of a reciprocating pump is typically a packing seal. When transporting media where leakage is not permitted, diaphragm reciprocating pumps can be used. The shaft seals of rotary pumps (including vane pumps, rotor pumps, etc.) mainly consist of packing seals, mechanical seals, and dynamic seals.

westring seal principle

A mechanical seal is a shaft sealing device that achieves leak prevention by keeping one or several pairs of end faces, which slide relative to each other perpendicular to the axis, in contact under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism, supplemented by auxiliary seals. A common mechanical seal structure consists of components such as a stationary ring (static ring), rotating ring (dynamic ring), elastic element spring seat, set screws, rotating ring auxiliary O-ring, and stationary ring auxiliary O-ring. Anti-rotation pins are 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.

westring seal system composition

1) Seal chamber: In the past, seal chambers used to house mechanical seals were stuffing boxes designed for soft packing seals. They are unsuitable for housing mechanical seals, not only because they are too small and have too narrow clearances, but also because their 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 Fluid Engineering Study Group) in the United Kingdom are both researching rational mechanical seal chamber designs. Their shapes should not only facilitate fluid flow and heat dissipation but also help remove solid particles, thereby providing a favorable surrounding environment for the seal. 2) Volatile emission control system: In the past, attention was focused only on eliminating visible fluid leaks, while neglecting the control of invisible volatile emissions. This has resulted in environmental pollution and poses hazards to equipment and personnel. Abroad, for example, the Sealing Technology Committee of the Society of Tribologists and Lubrication Engineers (STLE) in the United States has developed guidelines for controlling volatile emissions from rotating machinery, compressors, and screw systems equipped with mechanical seals, namely 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 confusing 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 cushioning agent; the pressure of the buffer fluid is always lower than the pressure of the sealed process fluid. 3) Supporting accessories for auxiliary systems: Auxiliary systems for mechanical seals require supporting accessories for cooling, heating, flushing, and other functions. Pump circulation needs to be optimized, and issues such as condition monitoring systems are being studied and resolved. The supporting accessories for auxiliary systems are specified in the API-682 standard. 4) Gas barrier seal system: In the past, liquid barriers were commonly used to seal liquids or gases in barrier seal systems. To simplify bulky barrier liquid systems, barrier gases are now used to seal liquids or gases. In gas barrier seal systems, spiral groove gas seals with barrier gas, floating bushings with barrier gas, and other methods can be employed to seal gases and liquids.

westring seal precautions

1) Before designing grooves, please carefully read the product descriptions for each series to distinguish whether the product uses an integral groove or a split groove. During the seal installation process, avoid sharp edges. Installing bore seals into integral grooves requires installation tools. Designers must consider parameters such as groove dimensional accuracy, surface roughness, and extrusion gap. For details, refer to the product instructions, diagrams, and dimension tables. 2) Before installing the seal, ensure that there are no impurities or cracks in the seal groove. Apply operating oil to both the seal groove and the seal surface. Install the seals gradually in sequence. Avoid sharp edges during installation, align the seal properly, and prevent twisting or skewing. If it is a split groove, tighten the gland last.

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