GESTRA UNA 14, PN25 UNA 16, PN40 / CL150, Carbon Steel UNA 16A, PN40 / CL150, Stainless Steel DN 15, 20, 25, NPS ½”, ¾”, 1″

Ball Float Steam Trap

GESTRA UNA 14, PN25 UNA 16, PN40 / CL150, Carbon Steel UNA 16A, PN40 / CL150, Stainless Steel DN 15, 20, 25, NPS ½", ¾", 1" Ball Float Steam Trap
GESTRA UNA 14, PN25 UNA 16, PN40 / CL150, Carbon Steel UNA 16A, PN40 / CL150, Stainless Steel DN 15, 20, 25, NPS ½", ¾", 1" Ball Float Steam Trap
GESTRA UNA 14, PN25 UNA 16, PN40 / CL150, Carbon Steel UNA 16A, PN40 / CL150, Stainless Steel DN 15, 20, 25, NPS ½", ¾", 1" Ball Float Steam Trap

GESTRA UNA 14, PN25 UNA 16, PN40 / CL150, Carbon Steel UNA 16A, PN40 / CL150, Stainless Steel DN 15, 20, 25, NPS ½”, ¾”, 1″ Ball Float Steam Trap

Type UNA 14, UNA 16 and UNA 16A ball float steam traps are used to discharge condensate in steam and other gases or gaseous mixtures. UNA 14, UNA 16 and UNA 16A are steam traps with a ball float and sealing unit with rolling ball. As their operation is unaffected by backpressure, the equipment is suitable for universal use.

Suitable for large condensate flowrates

The control unit opens the orifice (O) based on the fill level. This regulates the drainage rate. With the orifice opened to maximum, the drainage rate depends on the diameter of the orifice.

Component EN ASME / ASTM
Body of UNA 14, UNA 16 1.0460 SA105
Body of UNA 16A (stainless steel) 1.4404 SA182-F316L
Cover of UNA 14 5.3103 A536 60-40-181
Cover of UNA 16 1.0619 SA216-WCB
Cover of UNA 16A (stainless steel) 1.4408 SA351-CF8M
Body gasket Graphite/CrNi
Membrane regulator capsule 5N2 Hastelloy/stainless steel
Other controller parts, sealing ring Stainless steel

1 ASME/ASTM material is comparable to EN material. Pay attention to differences in chemical and physical properties.

GESTRA UNA 14, PN25 UNA 16, PN40 / CL150, Carbon Steel UNA 16A, PN40 / CL150, Stainless Steel DN 15, 20, 25, NPS ½”, ¾”, 1″

Ball Float Steam Trap

GESTRA: The Ultimate Solution for Industrial Steam & Fluid Control Systems

PN 25 / PN 40 – Class 150 – DN 15, 20, 25 (NPS ½”, ¾”, 1″)

High-Efficiency Ball Float Steam Trap for Industrial & Process Steam Systems

The GESTRA UNA 14, UNA 16, and UNA 16A Ball Float Steam Traps are high-performance mechanical steam traps designed for efficient condensate discharge, zero live steam loss, and long-term operational reliability. Engineered to operate at PN 25 and PN 40 / ASME Class 150, these steam traps are ideal for low to medium pressure steam applications across a wide range of industries.

Available in DN 15, DN 20, and DN 25 (equivalent to NPS ½”, ¾”, and 1″), the UNA 14 and UNA 16 series deliver precise condensate control in compact steam systems where efficiency and durability are essential.

The GESTRA UNA series utilizes a mechanical ball float mechanism that automatically and continuously discharges condensate as it forms. This design ensures maximum heat transfer efficiency, prevents condensate backup, and protects steam equipment from water hammer and corrosion.

Unlike thermodynamic steam traps, ball float steam traps such as the GESTRA UNA 14 and UNA 16 respond instantly to load changes, making them ideal for process-critical steam applications.

Available Models

  • GESTRA UNA 14 Ball Float Steam Trap – PN 25

  • GESTRA UNA 16 Ball Float Steam Trap – PN 40 / Class 150 (Carbon Steel)

  • GESTRA UNA 16A Ball Float Steam Trap – PN 40 / Class 150 (Stainless Steel)

Technical Data

Specification UNA 14 UNA 16 UNA 16A
Pressure Rating PN 25 PN 40 PN 40
ASME Class – Class 150 Class 150
Body Material Carbon Steel Carbon Steel Stainless Steel
Nominal Size DN 15–25 DN 15–25 DN 15–25
NPS Size ½”–1″ ½”–1″ ½”–1″
Connection Type Flanged / Threaded* Flanged / Threaded* Flanged / Threaded*
Medium Steam & Condensate Steam & Condensate Steam & Condensate

*Connection type may vary by configuration.

1. Continuous Condensate Discharge

The ball float mechanism allows condensate to be discharged immediately, maintaining stable steam temperature and improving heat transfer efficiency.

2. Zero Live Steam Loss

The UNA series steam traps ensure that only condensate is discharged, resulting in significant energy savings and reduced operating costs.

3. Material Options for Different Environments

  • UNA 16 (Carbon Steel) for standard industrial use

  • UNA 16A (Stainless Steel) for corrosive or hygienic applications

4. Compact Size for Small Steam Lines

With sizes from DN 15 to DN 25, these steam traps are ideal for equipment-level condensate drainage.

5. Long Service Life & Low Maintenance

GESTRA’s precision engineering ensures high durability, minimal downtime, and extended maintenance intervals.

These ball float steam traps are widely used in:

  • Steam tracing systems

  • Heat exchangers

  • Steam coils and heaters

  • Food & beverage processing

  • Pharmaceutical and biotech plants

  • Chemical processing facilities

Using a GESTRA ball float steam trap provides:

  • Immediate response to condensate formation

  • Stable and continuous condensate removal

  • Reduced risk of water hammer

  • Improved system efficiency

  • Longer equipment lifespan

Always ensure you purchase original GESTRA UNA 14, UNA 16, or UNA 16A steam traps from authorized suppliers.

Original products include:
✔ GESTRA identification markings
✔ PN & ASME Class certification
✔ Manufacturer documentation
✔ Verified serial numbers

Using non-genuine steam traps may result in energy loss, system damage, and safety risks.

✔ 100% genuine GESTRA products
✔ Competitive industrial pricing
✔ Professional technical support
✔ Fast delivery & reliable logistics
✔ Warranty & after-sales service

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