German roehm seals roehm models roehm prices

roehm seals are materials or components that prevent leakage of fluids or solid particles from adjacent mating surfaces and prevent external contaminants such as dust and moisture from entering machinery. The recommended storage temperature for seals is below 30°C to avoid high-temperature aging. Seals can be divided into two main categories: static seals and dynamic seals. Their primary function is to prevent leakage of fluids or solid particles from adjacent mating surfaces and to prevent external contaminants such as dust and moisture from entering machinery components or systems. Static sealing refers to the tight closure of sealed chambers or containers used for sealing letters and testamentary seals.

roehm seal features

1) No measurement of seal working length is required during installation; 2) The shaft can be adjusted at any time; 3) No leakage occurs at startup because the seals are pre-tested; 4) Installation only requires tightening the seal cover bolts, ensuring easy assembly quality control; 5) Protects sealing surfaces from contamination by debris or damage due to operational errors before installation or startup; 6) Can be readjusted after thermal expansion of the machinery; 7) Self-centering through fit; 8) Seals can be easily removed for cleaning and inspection without disassembling the pump equipment. The API682 standard recommends cartridge mechanical seals for all mechanical seals.

roehm seal startup preparation

1) Comprehensive inspection of the mechanical seal, auxiliary devices, and pipeline installation to ensure completeness and compliance with technical requirements. 2) Perform a static pressure test before starting the mechanical seal to check for leakage. If significant leakage is observed, identify and eliminate the cause. If ineffective, disassemble, inspect, and reinstall. The general static test pressure is 2 to 3 kg/cm². 3) Rotate the pump according to its direction to check for smooth and uniform movement. If rotation is difficult or stuck, check for incorrect assembly dimensions or improper installation.

roehm seal specifications and applications

1) Standard single-lip type: Generally used for sealing mineral oil, water, and other media on high- and low-speed rotating shafts and reciprocating motion. Standard oil seals are used in environments with minimal dust and contaminants, resistant to media pressure< 0.05MPa, maximum linear speed 15m/s, reciprocating speed< 0.1m/s. 2) Standard double-lip type: In addition to the characteristics of the above S type oil seals, it also provides dust protection. Standard oil seals with a dust lip can prevent dust ingress, resistant to media pressure< 0.05MPa, linear speed ≤ 15m/s. 3) Springless type: Single-lip inner-cage rubber oil seal without a spring. Generally suitable for low-speed conditions where the sealing medium is lubricating grease. Linear speed ≤ 6m/s. 4) Outer-cage single-lip type: Single-lip outer-cage rubber oil seal with a spring, featuring a thin waist, good followability, and good rigidity. Standard oil seals are used in environments with minimal dust and contaminants, resistant to media pressure< 0.05MPa. For rotational axis speeds ≤ 15m/s. 5) Outer-cage double-lip type: Double-lip outer-cage rubber oil seal with a secondary lip, featuring a thin waist, good followability, high rigidity, and good coaxiality. Standard oil seals with a dust lip can prevent dust ingress, resistant to media pressure< 0.05MPa. Rotational speed ≤ 15m/s. 6) Assembled single-lip type: Outer-cage oil seal formed by assembling inner and outer cages with rolled edges, featuring high installation precision, fast heat dissipation, and heavy-load characteristics. Suitable for heavy-load conditions under high temperature and high speed, media pressure ≤ 0.05MPa, maximum linear speed ≤ 15m/s. 7) Unidirectional return flow type (right-hand, left-hand): Angled ribs are manufactured on the air side of the lip, utilizing fluid dynamics principles to generate a unidirectional pumping action with a return flow effect. Related to the shaft's rotation direction, the radial force is smaller than that of standard oil seals due to the return flow effect, reducing wear and heat generation, and extending service life. Suitable for media pressure< 0.05MPa, rotational speed ≤ 20m/s. 8) Pressure-resistant type: Short lip and short, thick waist, providing pressure resistance, working pressure ≤ 3MPa. Suitable for applications with media pressure ≤ 3MPa, suitable for shaft end oil seals of high-pressure pumps. Under normal conditions, the PV value ≤ 8. Rotational axis speed ≤ 15m/s.

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