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NMDS-4000 - Non-Metallic Dry Studs Double seal with single row setscrew drive for Reactors
The NMDS-4000 is a Non-Metallic Dry Double Mechanical Seal, that is externally mounted and designed specifically for mixers, agitators, and reactors operating in critical process environments.
Engineered for reliability and efficiency, this seal features non-metallic wetted parts with monolithic, hydraulically balanced seal faces that are specifically engineered for dry, marginal lubrication operation, ensuring superior performance under varying pressures and speeds.
Designed for API Plan 72 and Plan 75 systems, the NMDS-4000 delivers enhanced safety, extended seal life, and reliable performance, making it the ideal choice for high-performance mixing and reaction equipment.
Key Features:
- Dry Running Seal face technology ensures no barrier / buffer fluid contamination of the process fluid. Preferably operates on inert gas such as nitrogen.
- Double Canister Design – Provides a rotary inboard seal running against a clamped L-Shaped Stationary, with springs out of the product media.
- Non-Metallic Wetted Parts - Ideal solution for reactors and vessels containing highly corrosive liquids and gases. Seal is supplied with a glass (enamel) lined flange to the dimensions of DIN 28-159 (where applicable)
- Externally Mounted - The cannister design allows for the seal to be installed direct to an equipment plate without the need for a stuffing box/seal chamber.
- Hydraulically Balanced Seal Faces – Minimizes wear and enhances seal longevity, reducing maintenance and downtime.
- API Plan 72/74 Compatibility – Ideal for un-pressurized buffer fluid systems, helping to reduce process leakage with enhanced safety.
- Studded Canister Construction – The canister single seal provides easy installation and replacement, reducing assembly time and maintenance complexity.
- Monolithic Seal Faces - Monolithic (one piece) seal faces are the face of choice for high temperature applications over shrink fitted seal faces with differential thermal expansions of the bi-materials.
- Single Row Setscrew Clamp Ring - for light-medium seal to shaft drive.
Upgrade your mixers, agitators, and reactors with the NMDS-4000 – where precision engineering meets innovation.
Applications:
- Chemical & Petrochemical Processing – Seals critical, highly corrosive fluids in reactors and mixing equipment.
- Pharmaceutical & Biotechnology – Ensures contamination-free sealing in sterile processes.
- Food & Beverage Processing – Meets stringent hygiene and safety standards for product integrity.
- Oil & Gas Industry – Handles high-pressure and high-temperature environments.
- Specialty Coatings & Adhesives – Prevents leaks in mixing and blending applications.
Safe Operating Limits:
This seal incorporates best practice features and innovation as detailed in our technical blogs and white papers.
** Apply Pressure, Speed and Temperature de-rating factors, by shaft size and application. For safe operating limits, please contact your nearest STANSEALS technical representative.
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