{"id":277,"date":"1970-01-01T00:00:00","date_gmt":"1970-01-01T00:00:00","guid":{"rendered":"http:\/\/equilibar.183-2.purplecat.net\/?page_id=277"},"modified":"2025-07-30T13:04:13","modified_gmt":"2025-07-30T17:04:13","slug":"low-flow","status":"publish","type":"page","link":"https:\/\/www.equilibar.com\/de\/back-pressure-regulators\/severe-services\/low-flow\/","title":{"rendered":"Back Pressure Regulator for Low Flow"},"content":{"rendered":"

Very Low Flow and Zero Flow Applications<\/h2>

Conventional back pressure regulators often have trouble maintaining target pressure at extremely low flow rates. Equilibar has designed some back pressure regulator models specifically for ultra low flow and zero flow applications.<\/p>

For pressure control applications requiring flow rates below about 10 ml\/minute, Equilibar offers the UL (Ultra Low) series and the ZF (Zero Flow) Series.<\/p>

The Equilibar\u00ae ZF takes performance down below the nano liters\/minute range. This makes the ZF Series back pressure regulator a true microfluidics pressure regulator. The Cv ranges from 0 to 0.15 and controls pressure up to 3000psig\/200bar(g) It is available in HPLC inlet\/outlet port and 1\/8″ NPT inlet\/outlet port. For custom port sizes, please contact an Equilibar application engineer<\/a>.<\/p>

The Ultra Low Flow Series (UL) performs similarly to the standard Research Series back pressure regulators, but can operate at lower flow rates. The Cv ranges from 1E-9 to 0.05 and can control pressures up to 10,000 psig \/ 680 bar(g). There is also a high temperature model for extreme applications up to 450C. Inlet and outlet port sizes are 1\/6″ HPLC, 1\/8″ NPT and 1\/4″ ‘NPT.<\/p>

Equilibar Research Series Back Pressure Regulators<\/a> are addressing many critical laboratory and microfluidics needs by providing precise control at the lowest flow rates in the industry. The Equilibar back pressure regulator’s unique design easily provides flow turndown ratios of 10,000:1 and up to 100,000:1 in many cases to meet a multitude of research conditions.
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\"ultra<\/p>
Zero-Flow Capable ZF Series BPR<\/strong>
The EB1ZF1 hold stable inlet pressure from true zero flow up through 1000 ml\/min. See our Research Series BPR brochure<\/a> for details.<\/div> <\/div><\/div>
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