NMCS-5505 - Non-Metallic Canister Studs double seal with integral ball bearing, pumping ring, cooling jacket & single row setscrew drive seal

The NMCS-5505 is a Non-Metallic Canister Double Mechanical Seal, with integral cooling/heating jacket, pumping ring and ball bearing. The seal 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, ensuring superior performance under varying pressures and speeds.

Designed for API Plan 52, 53 and 54 systems, the NMCS-5505 delivers enhanced safety, extended seal life, and reliable performance, making it the ideal choice for high-performance mixing and reaction equipment.

Key Features:

  • Double Canister Design – Provides a rotary inboard seal running against a clamped L-Shaped Stationary, with springs out of the product media.
  • Integral Ball Bearing - Supplied with ball bearing, ideal for low-medium shaft load support. Can be supplied without bearing or with heavy duty shaft load carrying bearing.
  • Pumping Ring - Even at slow shaft speeds, the integral pumping ring helps to assist the natural thermosyphon effect, promoting heat removal at the seal faces. Cooler seal faces increase seal longevity and performance.
  • 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 52/53/54 Compatibility – Ideal for pressurized barrier 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.
  • Integral Double Lip Seal - Prevents dust and debris collecting around outboard seal faces in top entry applications. Supplied with Drain connection orifice for leak face leakage detection.
  • 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.
  • Cooling/Heating Jacket - the highly efficient, innovative thermal jacket ensures heat can be added or removed to the barrier fluid create an ideal environment for seal longevity

Upgrade your mixers, agitators, and reactors with the NMCS-5505 – where precision engineering meets innovation.

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Supply/Design Characteristics
Seal Shaft Sizes
20mm - 200mm (0.750" - 8.000")
System Vessel Size
Inboard Seal Face Combination
Car/Sint.SiC, Car/TC, Sint.SiC/Sint.SiC, TC/TC, TC/Sint.Sic
Outboard Seal Face Combination
Gasket
PTFE, GFT, PTFE-SS
Secondary Sealing
Bellows
Inboard Wetted Parts
316 Stainless Steel
Elastomers
Viton, EPR, Alfas, FFKM
Shaft Speeds
up to 10 m/s (2,000 ft/min) **
Pressures
Vacuum to 10 Barg (145 pisg) **
Temperature
250 Deg.C (482 Deg F) **
Instrumention
Used in conjunction with a Plan 52, 53, or 54 piping system
Pipework & Fittings
Temperatures
250 Deg.C (482 Deg F) **

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.