High Precision Fisher 864 646 Electro Pneumatic Transducer 2625 Volume Booster Process Automation Price

The Fisher product combination includes the 864 646 Electro Pneumatic Transducer and the 2625 Series Volume Booster, both designed to enhance the performance of throttling control valves. The 864 646 Electro Pneumatic Transducer features a patented converter module that transforms a 4-20 mA electrical input signal into a proportional 0.2-1.0 bar (3-15 psi) pneumatic output signal. Its balanced component configuration ensures high performance and low vibration sensitivity. The 2625 Series Volume Booster (available in 2625, 2625 SST, and 2625 NS variants) works with positioners to boost control valve stroking speed. The 2625 NS is a nuclear-service model with elastomeric components resistant to high temperatures and radiation, while the 2625 and 2625 SST are certified for Safety Instrumented System (SIS) applications. Together, these products optimize valve control precision, speed, and reliability across various industrial settings.

• Compact and lightweight design for easy mounting and improved space utilization.
• Minimal output shift (less than 1% of span) when tested to SAMA standard PMC 31.1, Condition 3 in standard valve/actuator setups.
• Sufficient output volume to drive valve/actuator combinations without needing a positioner or volume booster.
• Low air consumption to reduce operating costs.
• Modular converter design enables easy on-site replacement, lowering maintenance expenses.
• Superior accuracy, linearity, and frequency response, with minimal hysteresis exceeding most control system requirements.

• Delivers high-volume output for rapid actuator stroking during sudden, large input signal changes.
• Integral bypass restriction adjusts booster response, ensuring smooth actuator motion for slow signal changes without affecting deadband.
• Soft seat construction provides tight shut-off, reducing unnecessary air consumption and eliminating positioner relay saturation.
• Enables high actuator stroking speeds on demand without compromising positioner steady-state accuracy.
• 2625 and 2625 SST variants are certified for SIS applications by exida® Consulting LLC.
• Compatible with diagnostic testing via installed connectors and piping.

• Input Signal: Electrical (4-20 mA analog signal)
• Output Signal: Pneumatic (0.2-1.0 bar / 3-15 psi)
• Max Outlet Pressure: 1.4 bar (20 psi gauge)
• Mounting Type: Remote mount, actuator mount
• Operating Temperature: Standard temperature range
• Supply Media: Air
• Diagnostics: None
• Certifications: CSA, FM, ATEX, IECEx, TR CU, and regional certifications
• Data Communication: Wired interface
• Power Supply: Local power source
• Hazardous Area Ratings: Explosion-proof, intrinsically safe, non-incendive, general purpose

• Input Signal: Pneumatic
• Max Outlet Pressure: 150 psig
• Mounting Type: Actuator mount
• Operating Temperature: Standard temperature, high temperature
• Supply Media: Air, natural gas
• Diagnostics: None
• Certifications: ATEX, CU TR
• Safety Certification: SIL 3 capable
• Position Control: Modulating control
• Special Variant (2625 NS): Elastomeric components for high-temperature and radiation resistance (nuclear service)

• Ideal for industrial processes requiring precise conversion of electrical signals to pneumatic signals for valve/actuator control, such as oil and gas, chemical, and power generation.
• Suitable for applications where space is limited, and low maintenance and operating costs are priorities.
• Works in environments with standard temperature conditions, providing reliable signal conversion for smooth valve operation.

• Used in throttling control valve systems across industries (oil and gas, petrochemical, nuclear, etc.) to increase stroking speed.
• 2625 NS: Nuclear power plants and other nuclear-service environments requiring high-temperature and radiation resistance.
• 2625 and 2625 SST: SIS applications in critical processes (e.g., emergency shutdown systems) where safety certification is mandatory.
• On/off control setups (with integral bypass restriction fully closed clockwise) and precision valve control systems (when paired with a positioner).

1. Q: Can the Fisher 864 646 Transducer work without a positioner or volume booster?

   A: Yes, its output volume is sufficient to drive most valve/actuator combinations without additional positioners or volume boosters.
2. Q: What makes the 2625 NS Volume Booster suitable for nuclear applications?

   A: It uses specialized elastomeric components that better withstand high temperatures and radiation, meeting the demands of nuclear-service environments.
3. Q: Are the 2625 and 2625 SST Volume Boosters SIS-certified?

   A: Yes, they are certified for SIS applications by exida® Consulting LLC, a global leader in functional safety.
4. Q: How does the 2625 Volume Booster’s integral bypass restriction affect performance?

   A: It tunes response for smooth motion during slow signal changes and enables fast stroking for large changes, without impacting deadband or steady-state accuracy.
5. Q: What is the maintenance requirement for the 864 646 Transducer?

   A: Its modular converter design allows easy on-site replacement, reducing maintenance time and costs, and low air consumption minimizes long-term operational upkeep.

For inquiries, technical support, or orders related to the Fisher 864 646 Electro Pneumatic Transducer and 2625 Volume Booster, reach out via:

• WeChat / WhatsApp / Phone Number: +8613472860702

• Fisher VBL Volume Booster: Similar to the 2625 Series, it boosts stroking speed with fixed deadband, soft seats, and integral bypass restriction, suitable for standard industrial applications.
• Fisher Positioners (e.g., Fisher DVC6200 Series): Pair with the 2625 Volume Booster to enhance valve positioning precision, ideal for throttling control valves in critical processes.
• Fisher Control Valves: Compatible with both the 864 646 Transducer and 2625 Volume Booster, offering reliable flow control across oil, gas, and chemical industries.
• Emerson Process Management Sensors: Complementary devices for monitoring process parameters, integrating with the Fisher product suite for comprehensive system control.