fisher safety valve manufacturer

Industry leading pressure and safety relief valve designs with over 140 years of technical and application expertise providing custom engineered solutions for O&G, Refining, Chemical, Petrochemical, Process and Power applications. Our designs meet global and local codes and standards (API 526; ASME Section I, IV & VIII; EN ISO 4126; PED & more). Gain insight into the performance of your pressure relief valves with wireless monitoring.

We know the consequences of process failure are great, that’s why we have an unwavering commitment to standards and processes that ensure innovative and reliable product designs. Many years from now, as the Fisher™ brand is put onto products, customers will continue to know it stands for integrity.

UL Listed external relief valves used on ASME containers. The relief valve is held close by the spring force seating the rubber valve disc against the orifice. When the tank pressure exceeds the spring force, the valve disc lifts off the orifice allowing gas to discharge through the valve to the air. When the tank pressure decreases enough, the spring force closes the valve disc back against the orifice stopping further discharge. All working parts of theses valves are outside the container connection so they must be protected against mechanical damage.

Economical: Low initial cost, easy installation, and high capacity per dollar invested reduces total cost of having relief valve capabilities in your system

Durable: Brass body construction and stainless steel spring reduce susceptibility to corrosion damage and the preset, pinned spring retainer prevents relief valve setpoint tampering

UL Listed external relief valves used on ASME containers. The relief valve is held close by the spring force seating the rubber valve disc against the orifice. When the tank pressure exceeds the spring force, the valve disc lifts off the orifice allowing gas to discharge through the valve to the air. When the tank pressure decreases enough, the spring force closes the valve disc back against the orifice stopping further discharge. All working parts of theses valves are outside the container connection so they must be protected against mechanical damage.

Economical: Low initial cost, easy installation, and high capacity per dollar invested reduces total cost of having relief valve capabilities in your system

Durable: Brass body construction and stainless steel spring reduce susceptibility to corrosion damage and the preset, pinned spring retainer prevents relief valve setpoint tampering

The 289 Series relief valve is a throttling relief valve used downstream of pressure regulators to protect the downstream system from overpressure. A smooth throttling action minimizes pressure surges in the system during emergency operation. These relief valves are available in 1/4, 3/4, 1 or 2 NPT sizes with spring ranges (relief pressure settings) from 5 in. w.c. to 75 psig / 12 mbar to 5.2 bar.

All sizes above 1/4 NPT feature a pitot tube booster for achieving the highest possible relief capacity with a minimum buildup of system pressure. When the valve is opening, high gas velocity through the orifice creates an area of relatively low pressure near the end of the pitot tube. This pitot tube effect forms a partial vacuum above the diaphragm which helps to open the valve.

Fisher Types 1808 globe-style and 1808A angle-style pilot-operated backpressure regulators or relief valves are economical, compact devices used in gas or liquid service to maintain pressure on oil and gas separators, and in pressure relief applications in gas distribution systems.

Quiet Operation—The Whisper Trim™ cage option can reduce noise from high-velocity gas by as much as 10 decibels. Whisper Trim equipped regulators are especially engineered for high-pressure applications where sonic gas velocities are often encountered at relief valve outlets.

Stable Startup—The unique hollow valve stem in the pilot provides quick pressure registration on top of the main valve plug preventing main valve unseating during normal system startup.

Founded in 1880 by William Fisher, today Fisher valves are specified throughout oil, gas, petrochemical, refining, power, food/beverage, process and hazardous area industries. In 1992, Emerson acquired Fisher Controls International Inc effectively establishing a market-leading manufacturer of control valves and measuring equipment for industrial processes and hazardous areas.

Fisher rotary valves include include butterfly, eccentric plug, full bore pipeline, and segmented ball types – including throttling and service applications in gas and liquid pipelines with excellent isolation (shutoff), pressure levels and flow control.

Fisher valves are used daily and control plants consisting of hundreds and even thousands of control loops all networked together in order to produce a product. Each control loop has been designed to keep an important process variable such as pressure, flow, level or temperature within a required operating range.

In order to reduce the effect of these load disturbances, Fisher sensors and transmitters collect information about the process variable and its relationship to a desired set point. A controller will then process the information and decide what must be done in order to get the process variable to the optimum level.

The most common and final element in the process control industry is the control valve. Fisher valves manipulate a flowing fluid such as a gas, steam, water or chemical compound in order to compensate for the load disturbance and keep the regulated process variable as close to the desired set point as possible.

Fisher CV500 rotary control valve combines the rangeability of the cammed-segment V-notched ball along with the inherent ruggedness found in the Fisher V500 heavy duty bearings, seals and body.

This combination provides a strong balance of erosion resistance alongside pressure control for gas and liquids. The unrestricted, straight-through flow design provides high capacity for gas, steam, liquids and fibrous slurries whilst the flanged valve features streamlined flow passages, rugged metal trim components and a self-centering seat ring.

See how Fisher patent and innovate control valves advancing technology for process flow control in the oil, gas, petrochemical, power, nuclear, food/beverage, process and life sciences industries.

Fisher control valves and flow control products are suitable for use on many applications and throughout many industries. The most common applications and industries include HVAC, petrochemical, pharmaceutical and bio-technical.

Fisher products and solutions enable efficiency and can cost effectively manage these conditions as well as recovering high value products in order to make businesses much more competitive.

Fisher was established in 1880 when William Fisher developed the Type 1 pressure pump. Fisher is today a part of the Emerson Process Management group of companies developing and innovating process management products for over 135 years and continues to do so today. Fisher intends to remain a leader in the process control industry and to continue increasing its global presence.

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