Product Description
SAMSON 3730-3 Electro-Pneumatic Valve Positioner Product Introduction
1. Overview
The SAMSON 3730-3 is a high-precision, intelligent electro-pneumatic valve positioner designed for precise control of pneumatic actuators in industrial process automation systems. It supports HART® communication protocol, enabling seamless integration into digital control networks. With its robust construction (IP66 protection rating) and wide operating temperature range (-20°C to 80°C), the 3730-3 is suitable for demanding environments, including chemical plants, oil and gas facilities, and power generation.
Key applications include:
Control valves in hazardous areas.
Systems requiring SIL (Safety Integrity Level) certification.
Processes with stringent requirements for valve diagnostics and partial stroke testing (PST).
2. Core Features
2.1 Structural Design
Housing: Available in die-cast aluminum or stainless steel, ensuring durability in corrosive environments
Non-Contact Position Sensor: Eliminates m
Modular Components:
Electronic Travel Sensor: Detects valve stem displacement or rotation angle.
I/P Converter and Pneumatic Amplifier: Converts 4-20 mA signals to pneumatic output (0.2-1 bar or 0.4-2 bar).
Microprocessor Unit: Processes input signals and feedback for closed-loop control
2.2 Advanced Functionality
HART Communication: Allows remote configuration, real-time diagnostics, and parameter adjustments via TROVIS-VIEW software
Four Initialization Modes:
NOM Mode: Standard calibration based on valve travel.
Sub Mode: Emergency initialization without full valve stroke, ideal for critical processes
Quick Setup: Pre-configured parameters minimize manual adjustments
Diagnostics and Safety:
EXPERTplus Diagnostics: Monovers valve performance, detects hysteresis, and logs deviations
Fail-Safe Configuration: Supports AIR TO OPEN (ATO) or AIR TO CLOSE (ATC) modes via a safety reset switch
Continous Zero Monitoring: Ensures stability during operation
2.3 User Interface
Rotary Knob: Simplifies menu navigation and parameter selection (rotate to adjust, press to confirm)
180° Rotatable LCD: Adapts to any installation angle for easy readability
Integrated Alarms: Displays NAMUR NE 107-compliant status messages (e.g., overload, sensor faults)
Detailed Photos
4. Installation and Configuration
4.1 Mounting Flexibility
Compatible with linear and rotary actuators via:
IEC 60534-6-1 (linear valves).
VDI/VDE 3845 (rotary actuators)
Reversible Amplifier: Required for double-acting actuators (Type 3710)
4.2 Key Setup Steps
Electrical Connection:
Terminal
Pneumatic Supply:
Connect instrument air (1.4-6 bar) to the input port.
Safety Mode Selection:
Set ATO/ATC via the reset switch based on valve type (spring-close or spring-open)
Parameter Configuration:
Use the rotary knob to adjust:
Code 3: Enable parameter editing (set to YES)
Code 4: Set valve pin position.
Code 5: Define valve travel angle
Initialization:
Press the INIT button to start automatic calibration
4.3 Capacity Limiter Adjustment
MIN SIDE/MIN BACK: For small actuators (<240 cm²) with side/back signal ports.
MAX SIDE/MAX BACK: For larger actuators
Product Parameters
| Parameter |
Specification |
| Model |
3730-3 ESD Type |
| Input Signal |
4-20 mA (HART® communication) |
| Supply Pressure |
1.4-6 bar (20-90 psi) |
| Output Pressure |
0-6 bar (0-90 psi) |
| Travel Range |
3.6-200 mm (linear) / 24-100° (rotary) |
| Diagnostics |
EXPERT+ diagnostics, partial stroke testing (PST), hysteresis testing, data logging |
| Communication |
HART® protocol, SSP (SAMSON interface protocol), FDT/DTM integration |
| Display |
Alphanumeric LCD with adjustable orientation |
| Environmental Temp. |
-40°C to +80°C |
| Protection Rating |
IP66 |
| Explosion Protection |
ATEX EExi/EExA/nl, FM (intrinsic safety/non-sparking), SIL3 certification |
| Mounting Standards |
IEC 60534 (NAMUR), VDI/VDE 3845 for rotary actuators |
| Control Characteristics |
Adjustable (linear, equal percentage), PID coefficients |
| Integrated Functions |
- Certified solenoid valve- Valve position switches- Fault alarm contacts |
| Power Consumption |
Low steady-state air consumption <0.06 scfm |
| Additional Options |
- Position transmitter- Fail-safe action (ATO/ATC)- Pressure gauges |
5. Applications
The 3730-3 excels in:
High-Pressure Systems: Corrosion-resistant materials handle aggressive media.
Safety-Critical Processes: SIL 2 certification and PST support for emergency shutdowns
Pharmaceutical and Food Industries: Stainless steel housing meets hygiene standards
6. Maintenance and Diagnostics
EEPROM Storage: Retains parameters during power outages
Self-Diagnostics:
Detects zero-point drift, temperature anomalies, and mechanical wear.
Generates alerts via fault contacts or analog position transmitters
Runtime Counter: Tracks operational hours for predictive maintenance
7. Competitive Advantages
Precision: Non-contact sensors ensure ±0.5% accuracy
Versatility: Compatible with 90% of industrial actuators via modular adapters
Cost Efficiency: Reduced downtime through predictive diagnostics
8. Conclusion
The SAMSON 3730-3 combines cutting-edge technology with rugged reliability, making it a top choice for modern process automation. Its HART integration, advanced diagnostics, and flexible installation options cater to industries requiring precise valve control under extreme conditions. By minimizing manual intervention and maximizing operational safety, the 3730-3 sets a benchmark in intelligent valve positioning.
Company Profile
KeRui (weifang) Automation Equipment Co., Ltd. specializes in industrial automation instrument development, production and sales,technical services, and supporting equipment supply of specialized companies. The main products are flow meters, level meters,temperature meters, pressure meters, electrical meters, thermal intelligent meters, programmable controllers (PLC), DCS distributed control systems, and eight series of more than 1,000 specifications. Its products and technologies are widely used in electric power, metallurgy, petrochemicals, environmental protection, plastics, food, printing, tobacco, textile, dyeing, and other fields.
Packaging & Shipping
The packaging and transportation of instrumentation in global trade hinges on a synergy of advanced materials, rigorous testing, regulatory compliance, and smart logistics. By adopting hybrid structural designs, leveraging real-time monitoring technologies, and prioritizing sustainability, exporters can ensure the safe, efficient, and cost-effective delivery of precision instruments. Continuous innovation in materials science and IoT integration will further redefine industry standards, enhancing resilience in an increasingly interconnected market.
FAQ
Q: How long will you give me the reply?
A: We will reply to you as soon as we see the information.
Q: What is the delivery time?
A: Our delivery time is within 3-7 days after we get your payment;
for large qty mass orders, the time should be confirmed again for you.
Q: How about your package?
A: Do not worry about the package, we have rich experience in packing, and all our package is wooden case package.
Q: How about the payment terms?
A: You can choose T/T.
Q: Do you provide samples?
A: Yes, we have materials in stock to help you to get the samples as soon as we can.
Q: What is the MOQ?
A:1PC.
Q: Can I get a lower price if I order large quantities?
A: Yes, cheaper prices with more bigger size orders.
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