Meaning of medium-density mechanical seal model numbers

In the model CMB21-050/B21-050Ft-E038AD C2OCMG1X1-G1, CMB21 denotes the series and model of the bellows mechanical seal; 050 may indicate size information. B21-050Ft refers to the specific model or configuration, while E038AD could be a material code or a design feature. C2OCMG1X1-G1 is likely related to the interface or connection method. For a specific explanation, it may be necessary to consult the manufacturer to confirm the detailed parameters and their meanings. .

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The coding for the mechanical seal model CMB21-050/B21-050Ft-E038AD C2OCMG1X1-G1 from Zhongmi (John Crane) generally follows industry standards and the manufacturer’s internal rules. The following is an interpretation of its possible meanings (for reference only; the exact meaning should be based on the manufacturer’s technical manual): 1. Analysis of the basic structure: CMB21-050 – refers to the main sealing ring section. CMB – may indicate the type of seal (such as modular, balanced, etc.). 21: Series code, indicating the applicable operating conditions (such as corrosion resistance, high temperature, etc.). 050: Shaft diameter size (e.g., 50mm). B21-050Ft: Secondary seal or mating ring portion. B21: Series that may match the primary seal. Ft: May indicate the material (such as silicon carbide) or special treatment (such as spraying). E038AD: Spring/auxiliary component code. E038: Spring type or quantity. AD: May refer to the material (such as 316 stainless steel) or design variant. C2OCMG1X1-G1: Configuration and additional options. C2: Sealing direction (such as double-ended, inward-facing, etc.). OCMG1X1: May indicate a flushing scheme (such as API Plan 53B) or cooling method. G1: Flange standard or interface size (such as ANSI standard). 2. Meaning of key parameters: Diameter: 050 corresponds to a diameter of 50 mm (the unit must be confirmed). Balanced type: The “B” in CMB may indicate a balanced design (to reduce end-face specific pressure). Modular: Integrated design for easy installation. Material: It needs to be determined based on the suffix (such as Ft, AD); common examples include: stationary ring: silicon carbide (SiC); rotating ring: tungsten carbide (WC); auxiliary seal: fluororubber (FPM) or polytetrafluoroethylene (PTFE). Operating condition suitability: E038AD may be suitable for high temperature/high pressure or corrosive media. 3. Suffix explanation C2OCMG1X1-G1: C2: may indicate double sealing (such as API 682 Type C). OCMG1X1: Irrigation plan code (such as Plan 23/52, etc.). G1: Interface specifications (such as 1-inch flange). 4. Precautions: The specifications for medium-density models may change as the product evolves. It is recommended to consult the latest version of the \"Medium-Density Mechanical Seal Selection Manual\". Contact the manufacturer’s technical support and provide complete operating conditions (medium, temperature, pressure, speed, etc.) to confirm the details. For more accurate decoding, please provide the specific application scenario (such as pump type and medium) or contact ZOPEK’s official channels directly.