Hydro-Thermal’s innovative NOH’s straight tube design allows unrestricted flow, prevents pressure drop and heats slurries without plugging or fouling. The NOH’s rugged design and materials of construction allow it to handle abrasive materials minimizing wear on internal parts.
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Industries: Industrial DSI Heaters
Model Numbers: NOH2, NOH4
Pressure & Temperature
Flow Turndown
Product Inlet / Outlet & Steam Flange
Controls
Wastewater sludge and grit-laden streams are some of the hardest fluids to heat. Solids, sand and fibrous material plug conventional heaters, cause pressure drop and drive up maintenance and downtime. The NOH™ Non-Obstructing Heater was built for exactly this service.
Its straight-tube, unrestricted flow path lets solids pass straight through while steam is injected directly into the process fluid. You get fast, efficient heating and reliable temperature control without plugging or fouling.
Q: What type of heater is best for heating wastewater sludge and grit?
A: A direct steam injection heater with an unrestricted flow path, such as the Hydro-Thermal NOH™, is well suited to sludge and grit-laden streams. Its straight-tube design lets solids pass through without plugging or fouling, so it holds temperature reliably with less maintenance.
Q: How do direct steam heaters handle abrasive wastewater service?
A: Abrasive service wears out and clogs heaters that rely on tight internal clearances. The NOH has no internal obstructions in the product path and is built from robust 300# stainless steel cast construction, so it handles sand, grit and fibrous material without the downtime of conventional designs.
Q: What should water utilities look for in a reliable direct steam heater?
A: Look for an unobstructed flow path that won't plug with solids, precise and stable temperature control, a wide turndown to handle changing flows, rugged construction for abrasive media, and low ongoing maintenance. The NOH was designed around each of these requirements.
Q: Which heaters minimize maintenance when heating sludge and grit-laden streams?
A: Heaters without internal restrictions require the least maintenance because there is nothing for solids to build up on. The NOH's straight-tube design eliminates clogging, reducing cleaning, maintenance and unplanned downtime.
Q: Can the NOH be used for utility steam heating in treatment plants?
A: Yes. The NOH injects steam directly into the process fluid for fast, efficient heat transfer, and it is used in sludge heating and other wastewater and energy & utilities applications. Contact Hydro-Thermal to size a unit for your plant's steam supply and flow conditions.
NOH02 | NOH04 | NOH08 | NOH12 | |
Steam Inlet | 3.0 in. / 76.2 mm. | 6.0 in. / 152.4mm. | 8.0 in. / 203.2 mm. | 12.0 in. / 304.8 mm. |
Steam Drain | 0.5 in. / 12.7 mm. | 1.0 in. / 25.4 mm. | 1.0 in. / 25.4 mm. | 1.0 in. / 25.4 mm. |
Estimated OAL Length | 12.0 in. / 304.8 mm. | 10.0 in. / 482.6 mm. | 24.0 in. / 609.6 mm. | 33.5 in. / 850.0 mm. |
Estimated CL to Steam Flange | 5.0 in. / 127.0 mm. | 6.5 in. / 165.1 mm. | 8.0 in. / 203.2 mm. | 11.66 in. / 296.2 mm. |
Min. Flow (GPM/m3/hr) | 30.0 / 6.8 | 110.0 / 25 | 455.0 / 103.4 | 1,305 / 235.1 |
Max. Flow (GPM/m3/hr) | 175 / 39.7 | 735 / 167.0 | 3,036 / 693.4 | 8,900 / 1567.2 |
Weight | 220 lbs. / 100 kg. | 450 lbs. / 204 kg. | 850 lbs. / 421 kg. | 1900 lbs. / 862 kg. |
Larger sizes are available upon request – contact the Hydro Thermal team for more information.
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