Pressure Regulators offer overpressure protection options.

Press Release Summary:

Comprised of direct-operated, spring-loaded regulators, Fisher® CS800 Series is available with Secondary Seat(TM), Internal Relief, and High Capacity Relief overpressure protection options. Various body sizes are available with flanged or threaded end connections, outlet pressure settings from 3.5 in. wc to 7.5 psig, orifice sizes from ¼ to 1 3/8 in., and option for internal or external pressure registration.

Original Press Release:

Emerson Introduces the Fisher® CS800 Series of Regulators with Overpressure Protection Options

New regulator series offers overpressure protection options for a variety of commercial and industrial applications.

MCKINNEY, TEXAS - Emerson Process Management has released the Fisher® CS800 Series of direct-operated, spring-loaded regulators with overpressure protection options. The CS800 Series' application flexibility and installation adaptability make them ideal for industrial and commercial applications needing accurate control, fast speed of response and easy maintenance.

Multiple overpressure protection options are available for the CS800 Series including:

  • Secondary Seat(TM) Protection: Provides a solution to the most common cause of regulators failing to shutoff. This new technology employs a secondary seating surface to provide shutoff if the primary orifice seating surface becomes damaged or blocked.

  • Internal Relief: Provides overpressure protection to the downstream system by relieving gas through the diaphragm assembly to atmosphere during an overpressure situation.

  • High Capacity Relief: Provides an increase in relief performance over basic internal relief thereby lowering installation cost by reducing equipment requirements.

    The CS800 series is available in numerous body sizes, with flanged or threaded end connections, outlet pressure settings ranging from 3.5-inches w.c. to 7.5 psig (9 to 515 mbar), orifice sizes from 1/4-inch (6.4mm) to 1 3/8-inch (35mm), and the option for internal or external pressure registration.

    Visit for a 3D animation of the overpressure protection options in action. For more product information visit or

    About Emerson Process Management

    Emerson Process Management (, an Emerson business, is a leader in helping businesses automate their production, processing and distribution in the chemical, oil and gas, refining, pulp and paper, power, water and wastewater treatment, mining and metals, food and beverage, life sciences and other industries. The company combines superior products and technology with industry-specific engineering, consulting, project management and maintenance services. Its brands include PlantWeb(TM), Syncade(TM), DeltaV(TM), Fisher®, Micro Motion®, Rosemount®, Daniel®, Ovation(TM), and AMS Suite.

    About Emerson

    Emerson (NYSE: EMR), based in St. Louis, Missouri (USA), is a global leader in bringing technology and engineering together to provide innovative solutions for customers in industrial, commercial, and consumer markets through its network power, process management, industrial automation, climate technologies, and tools and storage businesses. Sales in fiscal 2010 were $21 billion. For more information, visit

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