Back Pressure Regulator withstands aggressive chemicals.

Press Release Summary:

Available with ½–2 in. port sizes, Equilibar© Back Pressure Regulator utilizes flexible diaphragm as only moving part. Body is CNC-machined from PVDF bar stock, while diaphragm is manufactured from glass matrix reinforced PTFE material. Diaphragm acts to directly seal against valve seat, eliminating need for friction-causing dynamic seals. With response time measured in milliseconds, pilot operated regulator controls media pressure on inlet port in precise 1:1 relationship to pilot pressure.

Original Press Release:

Equilibar's PVDF (Kynar©) Back Pressure Regulator Meets Challenges of Aggressive Chemistries

New Technology Offers Unparalleled Performance for Demanding Applications

Fletcher, NC — With the introduction of its PVDF back pressure regulator, Equilibar offers a novel solution for applications that require precision pressure control in aggressive chemical environments.

Traditionally, back pressure regulators have sacrificed performance when they are made from materials that are compatible with severe chemistries such as acids and solvents.  This is because chemically resistant alloys require small sensing piston areas and unusual seal designs that adversely affect the accuracy and resolution of controlled pressure.  The Equilibar© back pressure regulator has a radically different design, overcoming performance challenges by using a flexible diaphragm as the only moving part.  This diaphragm features a larger area than competitive designs, making it more responsive to small changes in system pressure.  The diaphragm acts to directly seal against the valve seat, which eliminates the need for the friction-causing dynamic seals used in traditional regulators. 

Equilibar now offers this frictionless design in all PVDF (Kynar©) and PTFE (Teflon©) wetted parts.  The body is precision CNC machined from Kynar© bar stock, while the diaphragm is manufactured from a glass matrix reinforced PTFE material.  Port sizes range from 1/2 inch up to 2 inch (DN) to accommodate extremely low flow applications through high flow applications.  Port connections are available in standard ANSI/ASME flanges.  The body may also be custom machined to incorporate specific thread or fitting type, including ferrule or compression fittings.

The PVDF model of Equilibar© regulator was originally designed to improve the metering of small liquid doses into larger batches.  It has been successfully used to provide improved control when metering sodium hypochlorite in a water treatment facility.  In this application, where the corrosive nature of the sodium hypochlorite prevented the use of traditional stainless steel back pressure valves, the Equilibar© back pressure regulator is used to isolate the sodium hypochlorite pump outlet pressure from the constantly changing pressure in the water mains.  By holding the pump outlet at a fixed and repeatable pressure, the dose delivered by the pump remains consistent despite changes in the downstream water system. 

The Equilibar© is pilot operated and is controlled by applying an air pilot signal to the dome port.  It controls media pressure on its inlet port in a precise 1 to 1 relationship to the pilot pressure and is able to react quickly, with a response time measured in milliseconds.  Air pilot pressure may be provided by a simple mechanical knob-adjusted regulator or by a small electronic air pressure regulator.  The electronic regulator offers the choice of 4-20mA or 0-10VDC analog input signals or RS232/485 and Ethernet IP serial digital input signals.

Equilibar manufactures several back pressure regulators that feature 100% non-metallic construction for applications that cannot have any wetted metal parts.

Located in the Blue Ridge Mountains of North Carolina, Equilibar Precision Pressure Control provides custom solutions for the most demanding pressure control applications worldwide.  Equilibar engineers focus on rapid customer response, technical excellence and a creative, collaborative approach. 

Fore more information, visit Equilibar’s Severe Chemistry page at   or email .

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For content information, contact David Reed at  or 828-650-6590.

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