Mechanical Seal

Specifications

Mechanical Seal — Key Parameters

Shaft Diameter Range	14 – 200 mm
Max Working Pressure	≤ 2.5 MPa
Media Temperature	-50 °C – 220 °C
Max Linear Speed	≤ 20 m/s

Standard Allowable Axial Movement

Shaft Ø D1 ≤ 25 mm	± 1 mm
28 mm ≤ D1 ≤ 63 mm	± 1.5 mm
D1 ≥ 65 mm	± 2 mm

Mechanical seals are machined to original NEMO® seal-structure dimensions for direct interchangeability — no pump-housing modification needed on installation. They suit high / low temperature, medium-to-high pressure and most media including wastewater, chemical solvents, oils and food pastes. The seal correctly matches the pump’s axial movement allowance, compensating drive-shaft offset to avoid dry-running and leakage and extend seal life.

Single or double mechanical seal for NETZSCH NEMO® pumps — zero-leakage duty.

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Other Components

Coverage

Compatible Netzsch Models

Stage configurations (1–8 stage pumps):

Stage 1	Stage 2	Stage 3	Stage 4
NM015BY01L06B/V	NM015BY02S12B/V	NM015BY03S18B/V	NM015BY04S24B/V
NM021BY01L06B/V	NM021BY02S12B/V	NM021BY03S18B/V	NM021BY04S24B/V
NM031BY01L06B/V	NM031BY02S12B/V	NM031BY03S18B/V	NM031BY04S24B/V
NM038BY01L06B/V	NM038BY02S12B/V	NM038BY03S18B/V	NM038BY04S24B/V
NM045BY01L06B/V	NM045BY02S12B/V	NM045BY03S18B/V	NM045BY04S24B/V
NM053BY01L06B/V	NM053BY02S12B/V	NM053BY03S18B/V	NM053BY04S24B/V
NM063BY01L06B/V	NM063BY02S12B/V	NM063BY03S18B/V	NM063BY04S24B/V
NM076BY01L06B/V	NM076BY02S12B/V	NM076BY03S18B/V	NM076BY04S24B/V
NM090BY01L06B/V/Z	NM090BY02S12B/V/Z	NM090BY03S18B/V/Z	NM090BY04S24B/V/Z
NM105BY01L06B/V/Z	NM105BY02S12B/V/Z	NM105BY03S18B/V/Z	NM105BY04S24B/V/Z
NM125BY01L06B/V/Z	NM125BY02S12B/V/Z	NM125BY03S18B/V/Z	NM125BY04S24B/V/Z

Double-head and other configurations:

Double-head Stage 1	Double-head Stage 2	Other Models
NM015BY01P05B/V	NM015BY02D12B/V	NM003BY11S12B
NM021BY01P05B/V	NM021BY02D12B/V	NM005BY06S12B
NM031BY01P05B/V	NM031BY02D12B/V	NM008BY03S18B
NM038BY01P05B/V	NM038BY02D12B/V	NM011BY01L06B
NM045BY01P05B/V	NM045BY02D12B/V	NM011BY02S12B
NM053BY01P05B/V	NM053BY02D12B/V
NM063BY01P05B/V	NM063BY02D12B/V
NM076BY01P05B/V	NM076BY02D12B/V
NM090BY01P05B/V	NM090BY02D12B/V/Z
NM105BY01P05B/V/Z	NM105BY02D12B/V/Z
NM125BY01P05B/V/Z	NM125BY02D12B/V/Z

More models available on request — contact us with your pump nameplate data.

Structure

Part Position in the Pump

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