
Two-Stage Port Plate Liquid Ring Vacuum Pumps – NTS Series
We proudly offer the NTS Series Two-Stage Port Plate Liquid Ring Vacuum Pumps as high-performance replacements for select Sterling/Flowserve SIHI LPH Series models. These pumps deliver reliability and deep vacuum levels while simplifying integration into existing systems.
Wide Operating Range with Strong Performance
The NTS Series covers flow rates from 65 to 4200 CFM, giving you options for both compact and large-capacity needs. These pumps generate up to 28.9 inches HgV, making them ideal when your application demands deeper vacuum without losing efficiency or service life.
Designed for Industrial Applications
You can rely on the NTS Series for a wide range of industries. It performs exceptionally well in:
- Vacuum drying and degassing
- Papermaking and textile production
- Evaporation and distillation
- Vacuum filtration systems
- Power generation processes
Thanks to their flexibility, NTS pumps support both new installations and system upgrades.
Durable and Corrosion-Resistant Design
We build the NTS Series using cast iron for strength and longevity. For harsher environments, you can choose Stainless Steel 304 or 316. Since these pumps have few moving parts and no metal-to-metal contact, they operate smoothly for years with proper care.
Reliable Mechanical Sealing Options
To minimize fluid leakage and cut operating costs, you can select single or double mechanical cartridge seals. These seals maintain consistent vacuum performance while improving operational security.
Powerful Two-Stage Vacuum Technology
Each pump in the NTS Series uses a dual-stage system to deliver up to 28.9” HgV. This design is perfect for industries that require higher vacuum levels, yet still need robust flow rates and long service intervals.
Easy Installation and Replacement
If you’re replacing older units, NTS models 110–600 match the Sterling SIHI LPH Series footprint exactly. Larger models from 800–4200 serve as functional replacements with similar size and dimensions—making transitions smooth and cost-effective.
Backed by a One-Year Warranty
We stand behind every pump we sell. That’s why each NTS Series unit includes a one-year warranty against manufacturer defects. You can invest with confidence, knowing your system is protected.
Upgrade Today with the NTS Series
If you’re ready to improve your vacuum process, the NTS Series Two-Stage Port Plate Liquid Ring Vacuum Pumps offer a reliable and efficient path forward. From performance to price, these pumps are built to exceed expectations.

Also check out, “SRS Products“, “Contact SRS“
