Continuous Water Distiller

What is the Continuous Water Distiller?

A continuous water distiller produces distilled water as long as feed is supplied, without batch filling. It is used where a steady stream is needed for washers, autoclaves and process production support.

Overview

The continuous distiller is designed for steady output rather than batch operation. Feed enters continuously through a level-controlled valve, and a proportion is bled from the boiler to control salt concentration, so scaling is limited and quality stays stable. Output ranges from 10 to 100 liters per hour, and units may be single or double stage. Cooling is by water or by an air-cooled condenser for locations without a cooling supply. Because output is continuous, the unit is often connected directly to a washer, autoclave or distribution loop, with a storage tank for periods when demand is low. Conductivity is monitored and alarmed, and over-temperature and low-level protection are standard. Feed softening or reverse osmosis is strongly recommended, since uninterrupted operation depends on minimal scaling.

How does it work?

A distillation unit heats feed water to boiling in a boiler, and the steam rises through a column or baffle that separates entrained droplets carrying dissolved salts. The vapor then condenses on a cooled surface and is collected as distillate. Non-volatile ions, particles and pyrogens remain in the boiler, which is drained periodically, while volatile substances such as ammonia, carbon dioxide and some organics may carry over unless a baffle or a second stage traps them. Single-stage stills give conductivity of about 1 to 5 microsiemens per centimeter, and double-stage units reach lower values by distilling the distillate again. Typical components are the boiler with heating elements and level control, the condenser with cooling water or air, the baffle, and conductivity monitoring. Scale from hard water forms on the elements, so descaling is routine maintenance.

What are the key features?

• Continuous feed with level-controlled inlet valve
• Boiler bleed to control salt concentration
• Output of 10–100 L/h
• Water or air-cooled condenser options
• Direct connection to washers and autoclaves
• Conductivity monitoring with alarms

What are the technical specifications?

A typical continuous water distiller configuration offers output of 10–100 L/h, conductivity of 1–5 µS/cm, stages of 1 or 2, boiler bleed of Continuous or cyclic, cooling of Water cooled or air cooled and heater power of 9–45 kW. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Continuous Water Distiller is used in laboratory and production water supply, glassware washer feed, autoclave and sterilizer feed, multi-bench distribution and continuous reagent water production. Across the wider Distillation Units class, laboratories also deploy it for reagent and buffer preparation, autoclave and sterilizer feed and microbiology media preparation.

Which standards and certifications apply?

Relevant standards and methods include ISO 3696, CLSI GP40, USP <645>, IEC 61010-1 and ISO 9001. Certification candidates for this model are CE, ISO 9001 manufacturing and RoHS; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Feed the still with softened or pretreated water to slow scale formation, and descale on a regular schedule with a suitable acid. Do not let the boiler run dry; keep level controls and low-level cutouts in working order. Ensure adequate cooling water flow and temperature, because poor cooling reduces output and may allow vapor to escape. Drain the boiler concentrate regularly to prevent salt buildup, and never let it concentrate beyond the design limit. Clean the condenser and collection vessel to avoid re-contamination, and cover stored distillate. Follow IEC 61010-1 for electrical safety and local rules for hot water and steam. Record conductivity, output and descaling dates so quality and maintenance stay under control.

How do I select the right Continuous Water Distiller?

Choose a continuous distiller when output must be steady and high, and a batch still would need frequent attention. For small occasional volumes, a tabletop still suffices. In the RFQ, state output, cooling method, feed hardness and connection needs.

How does it compare with other Distillation Units variants?

Begin with the required water quality and volume. Single-stage stills suit general reagent preparation and autoclave feed, while double-stage or quartz stills are chosen when very low conductivity and low pyrogen content are needed. Match output to daily demand, considering that a still runs continuously and needs cooling water unless it is air-cooled. Check the material of the boiler and condenser, since borosilicate glass, quartz and stainless steel differ in contamination and durability. Hard feed water increases scaling and maintenance, so consider softening or reverse osmosis pretreatment. Look for automatic level control, over-temperature protection and conductivity monitoring, and confirm whether the design allows easy descaling. Finally, compare energy and cooling water consumption, because distillation has the highest operating cost of the common purification methods.