Fisher™ 3620JP

The Fisher™ 3620JP Jet-Pipe Electrohydraulic Valve Positioner, developed by Emerson, is a high-performance valve positioning system designed to provide precise, stable, and reliable control of hydraulic actuators in demanding process applications. Utilizing jet-pipe servo technology, this positioner ensures smooth, frictionless operation, exceptional sensitivity, and accurate valve positioning even under extreme load or vibration conditions. Engineered for Fisher hydraulic piston or rotary actuators, the 3620JP converts a 4–20 mA electrical control signal into a proportional hydraulic output, driving the actuator with precision and responsiveness. Its jet-pipe system eliminates sliding seals and minimizes wear, making it ideal for high-pressure, dirty-fluid, or high-vibration environments where conventional positioners may fail. The rugged construction, combined with advanced electrohydraulic control, allows the Fisher 3620JP to deliver consistent valve performance, long service life, and reduced maintenance costs—making it a preferred solution in industries such as oil and gas, refining, power generation, and chemical processing.

Technical Specification of Fisher™ 3620JP

Area Classification

Explosion Proof, Intrinsically Safe, Non-incendive, Dust

Certifications

CSA, FM, ATEX, IECEx, CUTR, Peso, KGS, INMETRO, NEPSI, RCM

Communication Protocol

4-20mA Analog

Data Interface

Wired

Diagnostics

No

Input Signal

Electric

Max Outlet Pressure

150 psi

Mounting Type

Actuator Mounted

Operating Temperature

Standard Temperature, High Temperature

Position Control

Modulating

Process Control

Flow, Pressure, Temperature, Level

Safety Certification

NIL

Supply Media

Air

Other Configurations

Contact your local Emerson business partner or sales office to learn about additional specifications or options for this product.

Feature of Fisher™ 3620JP

• The positioner provides accurate, fast response and can withstand the vibrations of most plant environments. Low steady-state air consumption contributes to efficient operation.
• Most of the parts for 3620JP positioners are interchangeable, requiring fewer spare parts to support these positioners.
• With the cover removed, zero span and cross-over adjustments are easily accessible and can be made with a screw driver.
• Easily adjustable minor loop gain fine tunes the positioner to optimize dynamic response for each specific actuator size and application.
• Changes in supply pressure have minimal effect on positioner operation.
• Case, components, and gasket materials withstand harsh environments. Positioner bleed air purges internal parts and actuator housing for additional protection.
• Simple adjustments permit switching between direct and reverse action; no additional parts are required.