Single Spring Unbalanced Seals
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Single Spring Unbalanced Seals
Economical & Versatile Sealing with Single Spring Unbalanced Designs
At GSI – Globe Seal Industries, we manufacture reliable single spring unbalanced seals that offer a cost-effective and efficient solution for general service applications across various industries. Designed for ease of installation and dependable operation in moderate pressures and speeds, these seals provide an excellent balance of performance and affordability.
Product Overview
Single spring unbalanced seals are compact mechanical seals that utilize a single helical coil spring to provide uniform face loading and compensate for minor shaft misalignments. Their simple, rugged design makes them ideal for sealing clean liquids and light slurries in pumps and rotating equipment where balanced designs are not necessary.
These seals are highly versatile and widely used for water, oils, and many mild chemical services.
Key Features
✔ Single Helical Spring: Provides consistent face contact and accommodates small shaft misalignments, enhancing reliability.
✔ Unbalanced Construction: Well-suited for low to medium pressure applications, reducing overall seal complexity and cost.
✔ Compact, Modular Design: Fits easily into standard stuffing boxes, simplifying retrofits and replacements.
✔ Available in Internal or External Mounted Styles: Depending on your equipment and space constraints.
✔ Replaceable Seal Faces: Simplifies maintenance and extends overall seal service life.
✔ Optional Boot or PTFE Wedge Designs: Available to suit different chemical and thermal environments.
Materials of Construction
GSI single spring unbalanced seals are crafted from carefully selected materials to meet a wide range of operating conditions:
Seal Faces: Carbon, Ceramic, Silicon Carbide, or Tungsten Carbide
Secondary Seals: Nitrile (Buna-N), Viton (FKM), EPDM, or PTFE depending on fluid compatibility
Metal Parts: SS 304, SS 316, or Hastelloy for enhanced corrosion resistance
Spring Materials: SS 316 or Alloy-20 for long-lasting performance
We customize material combinations to best match your process fluid, temperature, and pressure needs.
Applications
Our single spring unbalanced seals are a popular choice for:
Water & Wastewater Pumps
General Industrial Process Pumps
HVAC Circulation Systems
Light Chemical Transfer Pumps
Agricultural & Irrigation Equipment
Food & Beverage Auxiliary Services (non-critical applications)
Benefits of Choosing GSI Single Spring Unbalanced Seals
✅ Cost-Effective Sealing: An economical solution for standard applications without sacrificing reliability.
✅ Easy to Install & Maintain: Simplified design ensures quick assembly, reduced downtime, and straightforward face replacements.
✅ Handles Minor Misalignments: Single spring design accommodates slight shaft movements without compromising seal performance.
✅ Field Proven Reliability: Trusted by industries worldwide for sealing low to moderate pressure, clean service applications.
✅ Flexible Options: Available with multiple elastomer and face combinations to meet a wide range of operating conditions.