Description
FLUITEN Standard Mechanical Single API682 Seals BM4L – Single seal suitable for dry running thanks to Fluigrid technology, for installation on VS4 pumps or as back-up seals on magnetic drive pumps.
Key Technical Specifications:
| DIAMETER | SPEED | PRESSURE | TEMPERATURE |
|---|---|---|---|
| 20-110 (mm) | 0-23 (m/sec) | 0-1 (bar g) | -40 – 176 (°C) |
Why Choose FLUITEN BM4L?
The BM4L is a balanced, dry-running single‑ seal built for use on vertical side‑entry pumps (VS4 type) or as an auxiliary safety seal for magnetic‑drive pumps. Designed to operate without flush fluid, it effectively contains vapors using Fluigrid micro‑textured seal faces to reduce friction and heat build‑up while maintaining seal integrity and reliability. It works at atmospheric pressure, and is capable of functioning under brief overpressure conditions for up to eight hours under stuffing‑box conditions.
Key Technical Specifications
Seal Type: Balanced single cartridge with stationary secondary containment face, suitable for dry or vapor service
Stationary Ring Materials: Dry‑running resin‑impregnated graphite or optionally reaction‑bonded silicon carbide, sintered silicon carbide, or solid tungsten carbide
Rotating Ring Materials: Graphite‑antimony resin or ceramic inserts in SiC or tungsten carbide
Containment Design: Stationary flush-contact containment ring that supports dry-running at high peripheral speeds
Fluigrid Face Technology: Micro‑cavity lattice structure on sealing rings to reduce friction, improve face support, and limit heat generation
Containment Bush: Floating graphite auxiliary bushing to collect physiological leakage and support vapor containment
Springs: External Hastelloy spring pack located outside process fluid area
Balance and Overpressure Handling: Hydraulically balanced for dry operation; designed to withstand temporary overpressure (e.g., eight-hour endurance under stuffing-box conditions)
Installation Design: Tailored flange and shaft sleeve dimensions to match specific pump stuffing-box geometry; includes ports for vent or control of leakage on the process side
Typical Applications
Vertical side-entry pumps requiring dry-running capability with vapor containment
Magnetic-drive pump backup seals to prevent leaks if containment shell fails
Atmospheric or open systems with limited or no available flush fluid
Pump installations exposed to vapor emission or requiring simplified seal design
Additional Features
Operates effectively without flushing fluid, allowing cost‑efficient, simplified systems
Endures temporary overpressure without seal failure
Compact and modular cartridge format streamlines installation and maintenance
Incorporates floating bush and vent/flush ports for controlled leak management
