Fisher 3620jp Positoner
3620J
3620JP FISHER
fisher 3620jp
fisher valve 3620

Fisher 3620jp Positoner

The Fisher 3620JP positioner combines the flexibility of electrical control (4–20 mA) with the power of double-acting pneumatic actuators. It is engineered to handle valves that require air pressure for both opening and closing strokes — delivering precise, responsive control in modern automated systems while maintaining pneumatic reliability.

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Product Introduction

introduction

The Fisher 3620JP Positioner is a double-acting electro-pneumatic valve positioner designed to accurately control the position of rotary or sliding-stem control valves. It's suited for heavy-duty valves in chemical, petrochemical, power generation, or steam systems.

Main Specifications

Feature	3620JP
Input Signal	4–20 mA DC constant current (max 30 VDC)
Output	Pneumatic pressure to both actuator ports (double-acting), up to full supply (≤ 150 psig)
Actuator Compatibility	Double-acting piston or diaphragm actuators (rotary or sliding-stem)
Control & Adjustability	Modulating control, field-adjustable zero/span/gain; supports direct or reverse action
Performance	Low hysteresis (≈ 0.6% output span), good repeatability and stable response over varying supply pressures

features

Precise Control

Positioning accuracy reaches ±0.5% of output span (reverse-acting) and ±1.25% (direct-acting) for JP models, ensuring precise valve modulation.

Fast Response

Typical hysteresis around 0.6% of output span, supporting fast process control loops.

High Durability

The robust construction tolerates vibrations and internal bleed-air purging maintains actuator cleanliness, helping the positioner operate reliably in harsh industrial environments.

Installation Guidance

The Fisher 3620JP Positioner mounts directly on the actuator and requires both supply air and a 4–20 mA control signal. Installation includes wiring the control signal and connecting the air supply lines to both actuator ports. After installation, zero/span calibration and control loop tuning help optimize actuator response.

product-1266-594

3620JP vs. Other Models

Model	Input Signal	Actuator Type	Control Mode	Best Suited For
3610J	Pneumatic (psi/bar)	Single-acting (rotary/linear)	Pure pneumatic modulation	Simple pneumatic loops, legacy systems
3610JP	Pneumatic	Double-acting actuators	Pure pneumatic modulation	Heavy-duty valves needing bidirectional actuation
3620J	4–20 mA DC + air	Single-acting	Electro-pneumatic modulation	DCS/PLC controlled systems, retrofits
3620JP	4–20 mA DC + air	Double-acting actuators	Electro-pneumatic modulation	Automated systems with double-acting valves

why choose us

Large inventory to support fast delivery and urgent replacement needs
Short and stable lead times even for non-stock models
Multiple logistics options for global shipments
Professional technical support from experienced engineers
Competitive pricing with a one-year warranty
Trusted by industrial clients worldwide

product-800-680

FAQ

Q1: What type of control signal does the Fisher 3620JP accept?

A: The 3620JP accepts a 4–20 mA DC input signal, which is converted internally into a pneumatic control pressure to position the valve actuator.

Q2: Can the positioner be configured for different valve travel ranges?

A: Yes. Both zero and span are adjustable, allowing the device to match various actuator stroke or rotation ranges during commissioning.

Q3: What is the typical lead time?

A: For standard stock items, orders can usually be shipped within one week, depending on the destination. For special or customized products, lead times are confirmed in advance to meet project schedules.

Q4: How do you ensure product quality and after-sales support?

A: Each unit undergoes strict quality inspection before shipment to ensure reliable performance. We also provide a 1-year warranty, along with long-term technical support and spare parts availability.

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