Mechanical Seal Assembly for Agitators | Specifications & Verification

Product Specifications

Technical details and manufacturing context for Mechanical Seal Assembly

Definition

The Mechanical Seal Assembly is a critical sealing component within the Agitator Head Assembly. It creates a dynamic barrier between the rotating agitator shaft and the stationary housing, preventing process fluid leakage while allowing shaft rotation with minimal friction and wear. This assembly is designed for agitator systems in machinery and equipment manufacturing, where reliable sealing is essential for operational integrity and safety. The seal operates by utilizing precisely engineered mating surfaces, known as seal faces, which rotate against each other under controlled pressure. This mechanical contact, combined with a fluid film lubrication, forms a tight seal that accommodates shaft movement and thermal expansion. The assembly is available in a range of configurations to fit shaft diameters from 20 to 120 mm, with a pressure rating of 1.0 to 1.6 bar, and an operating temperature range of -40°C to 200°C. The maximum rotational speed is 20 rpm, and the seal face flatness is maintained at ≤0.0009 mm to ensure leak-free operation. The leakage rate is limited to ≤0.5 mL/h for liquid service, and the spring force is set between 50 and 200 N to ensure face contact at low pressure. Materials used include carbon, silicon carbide, stainless steel, and elastomers, with material grades such as 316L/SSiC for the face and metal parts. The weight of the assembly ranges from 0.5 to 8 kg, depending on size. These specifications are reference values and must be verified for the specific model and application with the legal manufacturer or supplier. Standards such as ISO 3069, DIN 24960, ISO 4928, and ASTM A276 are listed as procurement references, not as proof of certification or compliance. When selecting a mechanical seal assembly, consider the shaft diameter, operating pressure, temperature, speed, and the chemical compatibility of the process fluid. Verify the seal face flatness and leakage rate requirements for your application. Regular maintenance checks should include monitoring for leaks, wear on seal faces, and proper spring force. Failure signs include increased leakage, unusual noise, or vibration. The seal has defined operational boundaries; exceeding the specified pressure, temperature, or speed limits can lead to premature failure.

Working Principle

The mechanical seal assembly works by pressing two flat, ultra-flat surfaces—the seal faces—together. One face rotates with the shaft, the other is stationary. A spring provides initial contact force, and the fluid pressure in the system increases the contact pressure. A thin fluid film between the faces lubricates them, reducing friction and wear while preventing leakage. The faces are manufactured to a flatness of ≤0.0009 mm to ensure a tight seal. The assembly accommodates shaft movement and thermal expansion through its design, maintaining the seal over a range of operating conditions.

Common Materials

Carbon, Silicon Carbide, Stainless Steel, Elastomers

Technical Parameters

Parameter	Typical range	Notes & selection driver
Shaft DiameterRequired	20–120 mm	Diameter of the agitator shaft the seal is designed to fitISO 3069
Pressure RatingRequired	1.0–1.6 bar	Maximum operating pressure the seal can withstand
Temperature RangeRequired	-40–200 °C	Operating temperature range for the seal assemblyDIN 24960
Speed RatingRequired	≤20 rpm	Maximum rotational speed the seal can operate atDIN 24960
Seal Face Flatness	≤0.0009 mm	Critical for leak-free operationISO 4928
Leakage Rate	≤0.5 mL/h	For liquid serviceISO 5208
Spring Force	50–200 N	Ensures face contact at low pressure
Material Grade	316L/SSiC	Face: SiC; metal parts: 316LASTM A276
Weight	0.5–8 kg	Depends on size

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Primary Seal Ring Part
Rotating seal face that creates the primary sealing interface

Material: Hardened material like silicon carbide or tungsten carbide
Stationary Seal Ring Part
Stationary mating face that seals against the primary ring

Material: Carbon or ceramic material
Spring Assembly
Provides axial force to maintain seal face contact

Material: Stainless steel or corrosion-resistant alloy
Secondary Seals Part
Static seals (O-rings, gaskets) that prevent leakage at stationary interfaces

Material: Elastomers (Viton, EPDM, Nitrile)
Seal Housing Part
Structural component that holds all seal elements in proper alignment

Material: Stainless steel or cast iron

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Mechanical Seal Assembly.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Agitator Head Assembly

View system integration details

High-Flow Pump Assembly

View system integration details

Manufacturers of Mechanical Seal Assembly

Manufacturer profiles associated with Mechanical Seal Assembly.

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Procurement Evaluation Criteria

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Frequently Asked Questions

What are the key specifications of the mechanical seal assembly?

The assembly is designed for shaft diameters from 20 to 120 mm, pressure ratings of 1.0 to 1.6 bar, and temperatures from -40°C to 200°C. Maximum speed is 20 rpm, seal face flatness is ≤0.0009 mm, and leakage rate is ≤0.5 mL/h. Spring force ranges from 50 to 200 N. These are reference values; always verify with the manufacturer for your specific model.

What materials are used in the mechanical seal assembly?

Materials include carbon, silicon carbide, stainless steel, and elastomers. The material grade for the face is silicon carbide (SSiC) and for metal parts is 316L stainless steel. These materials provide corrosion resistance and durability. Confirm material compatibility with your process fluid.

How do I select the right mechanical seal assembly for my agitator?

Consider the shaft diameter, operating pressure, temperature, speed, and the chemical nature of the process fluid. Ensure the seal's specifications match your system's requirements. Also, check the seal face flatness and leakage rate requirements. Consult the manufacturer for application-specific guidance.

What are common signs of seal failure and maintenance needs?

Signs of failure include increased leakage, unusual noise, vibration, or visible wear on seal faces. Regular maintenance should include inspecting the seal for wear, checking spring force, and monitoring leakage rates. Follow the manufacturer's maintenance schedule and replace worn components promptly.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 20 bar (290 psi)
flow rate:	Not applicable (static sealing application)
temperature:	-40°C to 200°C (-40°F to 392°F)
slurry concentration:	Up to 40% solids by weight

Mechanical Seal Assembly

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards