John Crane PO3-38MM Mechanical Seal with Stationary Seat

John Crane PO3‑38MM is a single‑spring, pusher‑type mechanical seal assembly with stationary seat, designed for reliable shaft sealing in pumps and rotating equipment handling liquids in industrial applications. Technical specifications Manufacturer: John Crane International Manufacturer part number: PO3‑38MM Product type: Mechanical seal with stationary seat Seal design: Single spring, pusher type Seal configuration: Rotary seal head with separate stationary seat Nominal shaft size: 38 mm Seal orientation: Inside mounted Spring type: Single coil spring Seal face design: Flat mechanical seal faces Typical rotating face material: Carbon (resin‑impregnated) Typical stationary face material: Ceramic or silicon carbide (application dependent) Secondary seal material: Elastomer (commonly NBR, EPDM, or FKM depending on version) Metal parts material: Stainless steel Maximum operating pressure: Up to 10 bar (145 psi), dependent on materials and conditions Maximum operating temperature: −20 °C to +150 °C (dependent on elastomer selection) Maximum shaft speed: Up to 15 m/s (application dependent) Direction of rotation: Bi‑directional Installation type: Component seal Typical applications: Centrifugal pumps, water pumps, process pumps, general industrial services Compatible media: Water, light oils, chemicals (material dependent) Standards compatibility: Designed to industry‑standard mechanical seal dimensions Country of manufacture: United States Please review pictures carefully and let us know if you have any questions!