Fisher™ Gulde 3800SA Smart Valve Positioner | Compact, Non-Contact Feedback | HART & 4-20 mA Support

The Fisher™ Gulde 3800SA Smart Valve Positioner is a compact, user-friendly device designed for precise and reliable control of valve actuators in demanding industrial applications. It effortlessly converts a 4-20 mA analog signal into a proportional pneumatic output to drive control valves, ensuring accurate positioning and enhanced process stability

Purchase details

Product Description

Engineered for simplicity and performance, its non-contact, linkage-less feedback system eliminates physical wear parts, significantly extending service life and simplifying installation and maintenance . The intuitive local interface, featuring a button-controlled LCD display protected under a cover, supports multiple languages, including Chinese, facilitating easy configuration and operation .

The two-stage design, comprising a pilot stage and a pneumatic amplifier, ensures high static gain for responding to minute input signal changes while delivering sufficient air volume for excellent dynamic performance with low steady-state air consumption . Built with a robust aluminum alloy housing, it is suitable for harsh environments and offers certifications for use in hazardous areas .

Key Features & Benefits

Easy Installation & Operation: The linkage-less design and guided setup via the LCD menu reduce installation time and complexity. Action can be reversed in the field without additional parts .
Superior Control Performance: The two-stage design and digital tuning algorithm provide fast, precise valve positioning for tighter process control .
Advanced Diagnostics: Built-in diagnostics and alerts for travel deviation, limit switches, and stroke count help monitor valve health and preempt potential issues .
Flexible Integration: Supports traditional 4-20 mA systems and HART communication for seamless integration into existing control architectures and asset management tools .
I/O Options Package: Optional integrated limit switches and valve position transmitter (4-20 mA) eliminate the need for external devices .

Product Attributes

Attribute	Specification
Product Series	Fisher™ Gulde 3800SA
Function	Smart Electro-Pneumatic Valve Positioner
Input Signal	4-20 mA DC; Split-Range Capable
Communication	HART Protocol
Output Signal	Pneumatic
Output Pressure Range	0.5 to 7 bar (7 to 101 psig)
Action	Single-Acting, Direct Acting
Supply Air Pressure (Max)	7 bar (101 psig)
Air Consumption	0.06 Nm³/h @ 1.5 bar supply (2.3 scfh)
Independent Linearity	±0.5% of output span
Stroke Length Range	6.35 to 606 mm (0.25 to 23-7/8 inches)
Rotation Angle Range	45° to 90°
Installation Standard	IEC 60534-6-1, IEC 60534-6-2, VDI/VDE 3845, NAMUR
Electrical Connection	1/2″ NPT or M20 Conduit
Pneumatic Connection	1/4″ NPT or G1/4
Enclosure Material	A03600 Low-Copper Aluminum Alloy
Weight	1.5 kg (3.3 lbs)
Operating Temperature	-40°C to 85°C (-40°F to 185°F)
Environmental Rating	IP66
Hazardous Area Certification	Ex ia IIC T4/T5 Ga

Model Variants Summary

The Gulde 3800SA series includes various models and options to suit different application needs. Common base models and configurable options include :

3800SA-105
3800SA-204

Available Options:

I/O Package: Includes two configurable limit switches and a 4-20 mA valve position transmitter .
Voltage Supply: Standard 8-30 VDC .

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