Suction Diffusers
To protect expensive fluid circulation equipment, industrial companies frequently install strainers on the intake side of pumps. However, many pumps are still at risk due to the turbulent flow related to the inlet side. Combine the benefits of efficient straining and effective flow conditions through suction diffusers from Hellan Fluid Systems, a leading manufacturer of suction diffusers and strainers.
Control System Suction Diffusers
When bringing locally sourced water into a circulation or cooling system, there is always a risk of introducing some quantity of foreign particulates. To get around this, strainer technology is mounted on the inlet side of the pump to prevent contaminants from entering.
But when water enters into a pump directly from an elbow or short reducer, it can also start a swirling action that can have severe effects on the pump itself, wearing out seals faster and creating high imbalance within the pump. One way around this is to install a length of straight pipe going into the pump, but depending on the environment or application, available space may be at a premium.
A suction diffuser solves both of these problems. The unit uses strainer technology to capture particulates before they enter the inlet, and also contains straightening vanes that prevent the swirling effect of water at the inlet, removing turbulence and protecting seals from wearing out quickly without the need for an additional length of straight pipe.
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Suction Diffuser Specifications
Hellan Fluid Systems, a leading provider of control system suction diffusers, has combined its industry-leading industrial strainer technology across its line of suction diffusers. Working with carbon steel, stainless steel, and other materials on request, we manufacture suction diffusers in a wide range of dimensions, with a range of custom options available to fit your unique requirements:
- Filtration down to 40 microns
- Pressures to 740 PSIG
- Temperatures to 800°F
- Vent and/or differential pressure connections
- Hinged or quick opening/operator-assisted covers
- Units manufactured to sizes and designs specified by client
- Data packages and MTRs available on request
- Standard, undersized or oversized outlet connections
- One, three or five pipe diameters of flow straightening
Materials
- Carbon Steel
- Stainless Steel
- Other Materials Upon Request
End Connections
Sizes
- Fabricated - Custom sized to meet requirements
Our suction diffusers are manufactured to the highest standards and ratings in the industry:
- ASME Class 150
- ASME Class 300
- Welders certified to ASME Section IX
- ASME “U” stamped vessels available on request
With more than 75 years of experience, we can produce the suction diffusers to fit your specific requirements. Contact us today for a quote!
Suction Diffusers: Pump Protection for Data Centers
In data centers, the footprint of the mechanical room is often as valuable as the server floor itself. Hellan’s suction diffusers are engineered to provide high-efficiency deionized water filtration in tight spaces, replacing the traditional long-run piping, elbows, and separate strainers typically required before a pump. By integrating deionized water filtration directly at the pump inlet, our diffusers utilize internal straightening vanes to ensure laminar flow into the Cooling Distribution Unit (CDU) pumps. This is essential for DI water systems, where turbulence can lead to oxygen entrainment and cavitation, risking the thermal stability of the entire server hall. Constructed from 316 stainless steel to prevent ion leaching, these diffusers protect your pumps from debris while maintaining the high-resistivity environment required for liquid-to-chip cooling.
Frequently Asked Questions
The main difference between a suction diffuser vs. strainer is functionality and footprint. A standard strainer only removes particulates and requires a long run of straight pipe (5–10 diameters) to settle turbulent water before it hits the pump. A suction diffuser combines filtration with internal straightening vanes. This allows you to mount the unit directly to the pump inlet, eliminating the need for extra piping while ensuring laminar flow and preventing pump cavitation.
Yes! In high-purity applications like microelectronics or power generation, deionized water filtration is critical to prevent system contamination. Because DI water is chemically aggressive, Hellan manufactures suction diffusers in 316 Stainless Steel and other corrosion-resistant alloys. This prevents "ion leaching" and protects the integrity of the high-resistivity fluid.
Suction diffusers protect the most expensive part of your circulation system: the pump. By removing turbulence and "swirl" at the inlet, they prevent uneven loading on pump impellers and seals, which is the leading cause of premature failure.
Industries
Hellan Strainers are used in all industries that require the collection and removal of particulate from fluid systems. Listed below, are just a few of the ways Hellan provides industrial solutions to the global market.