Material Combinations (Optional)
Seal Faces: SiC/SiC or SiC/Carbon (standard); Tungsten Carbide (TC) available for abrasive services.
Secondary Seals (O‑rings): EPDM, FKM (Viton), PTFE; selected for chemical compatibility.
Metal Components: Duplex stainless steel (EN 1.4436/1.4404), 316L; Hastelloy optional for severe corrosion.
Spring: 316L or Hastelloy C‑276, corrosion‑resistant and isolated from process fluid
MOR JCS1 is a rugged, single‑acting, balanced, O‑ring pusher‑type mechanical seal with pump‑integrated design, originally engineered for Sulzer AHLSTAR UP pumps and widely adapted for Andritz process pumps and other heavy‑duty centrifugal pumps. It excels in clean, lubricating fluids and low‑consistency paper stock applications, delivering reliable sealing under demanding industrial conditions
Key Features
Pump‑Integrated, Single‑End Balanced Structure: Hydraulically balanced design ensures stable operation against sudden pressure shocks, reducing face loading and heat buildup
Patented Drive Mechanism: Torque transmitted via super‑elastic components with no drive pins on seal faces, preventing face cracking during startup
Self‑Aligning Elastic Thrust Ring: Accommodates minor shaft misalignment without spring pulsation or O‑ring wear
Single External Spring: Corrosion‑resistant spring located on the atmospheric side (stationary part), isolated from process fluid to avoid clogging
Impeller‑Side Installation: No need to remove the pump back plate; secured with a single bolt for fast, error‑free mounting
Pre‑Set, Measurement‑Free: Pre‑assembled unit eliminates on‑site dimensioning, minimizing installation mistakes
Applications
Pulp & Paper Industry: Stock pumps, low‑consistency paper stock pumps, washer pumps.
Water & Wastewater: Clean water pumps, circulation pumps, process water systems.
Chemical Processing: Solvent pumps, lubricating oil pumps, mild corrosive fluid services.
General Industry: Centrifugal pumps in power generation, mining, and refining where clean, lubricating fluids are handled.
Advantages
Superior Misalignment Tolerance: Self‑aligning thrust ring and external spring design handle shaft runout without performance loss
Fast, Low‑Effort Installation: Impeller‑side mounting and single‑bolt fastening cut downtime significantly
Reliable in Demanding Fluids: Optimized for water, oils, solvents, and low‑consistency paper stocks; resists clogging and wear
Long Service Life: Balanced design, high‑grade materials, and robust construction extend maintenance intervals
Perfect OEM Compatibility: Direct replacement for original seals on Sulzer AHLSTAR UP and Andritz process pumps
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