Samson Type 3730 Smart Digital Electropneumatic Positioners
The Samson Type 3730 Smart Digital Positioner Series (featured model: Type 3730-3 with HART communication) is SAMSON AG's premier intelligent positioner platform, engineered specifically for high-accuracy positioning, predictive maintenance, and SIL-certified fail-safe operation on linear and rotary control valves in chemical refineries, power plants, offshore platforms, and pharmaceutical processing lines[cite: 12]. Replacing traditional mechanical positioners, the Type 3730 features a **one-knob push-and-turn operation** and a multi-line graphic display that simplifies on-site commissioning[cite: 12]. With SAMSON's integrated **EXPERT+ diagnostic software suite**, the positioner continuously monitors valve health, detects packing friction, tracks supply air pressure, conducts Partial Stroke Tests (PST) for emergency shutdown valves, and pinpoints seat erosion before process failures occur[cite: 12]. Built inside a die-cast aluminum or stainless steel housing rated to **IP66 / NEMA 4X** with **ATEX / IECEx / FM explosion-proof approvals**, the Type 3730 supports versatile mounting options including **NAMUR rib attachment (IEC 60534-6-1)**, direct internal duct connection for **Type 3277 actuators**, and VDI/VDE 3845 rotary mounting for stroke lengths up to **300 mm**[cite: 12]. WE DRIVE HONGKONG LIMITED provides technical sourcing, communication protocol configuration, mounting kit selection, and global express supply for Samson Type 3730 positioners worldwide[cite: 12].
Technical Specifications
| Featured Model | Type 3730-31000000100000000.01 (Smart Electropneumatic Positioner, HART Communication, Single/Double-Acting, ATEX Ex ia Intrinsic Safety, Die-Cast Aluminum Housing)[cite: 12] |
|---|---|
| Brand / Manufacturer | SAMSON AG (German Precision Process Control Engineering)[cite: 12] |
| Product Series | Type 3730 Series (Variants: 3730-0, 3730-1, 3730-2, 3730-3 HART, 3730-4 PROFIBUS, 3730-5 Fieldbus, 3730-6 Pressure Sensors)[cite: 12] |
| Communication & Protocols | 4 to 20 mA / HART 7, PROFIBUS PA, FOUNDATION Fieldbus; Optional Binary Inputs / Limit Switches[cite: 12] |
| Supply Air & Pressure Range | 1.4 bar to 7 bar (20 psi to 105 psi) Clean Instrument Air; Extremely Low Air Bleed (<0.06 Nm³/h at 1.4 bar)[cite: 12] |
| Stroke / Angle Travel Range | Linear Actuators: 3.6 mm to 300 mm (0.14" to 11.8"); Rotary Actuators: 24° to 100° Opening Angle[cite: 12] |
| Diagnostic Capabilities | EXPERT+ Valve Diagnostics Suite (Online Friction, Hysteresis, Drive Signal, Partial Stroke Test PST)[cite: 12] |
| Enclosure & Explosive Certification | IP66 / NEMA 4X Environmental Rating; ATEX / IECEx Ex ia (Intrinsic Safety), Ex d (Flameproof) Options[cite: 12] |
Documentation & Resources
Samson Type 3730 Model Variants & Protocol Selection Matrix
Complete selection matrix for Samson Type 3730 smart digital positioners. Review model sub-series, communication protocols, diagnostic levels, explosion ratings, and standard application duty[cite: 12]:
| Positioner Sub-Series | Communication Protocol | Diagnostic Software Level | Actuator Action Support | Explosion Proof Rating | Samson Model Code Example |
|---|---|---|---|---|---|
| Type 3730-0 | 4 to 20 mA Analog | Basic Auto-Calibration | Single-acting / Double-acting | Non-Hazardous / Ex ia | 3730-0100000000000[cite: 12] |
| Type 3730-2 | 4 to 20 mA / HART 5/7 | EXPERT Diagnostics | Single-acting / Double-acting | ATEX Ex ia / Ex d / CSA | 3730-2100000010000[cite: 12] |
| Type 3730-3 | HART 7 (Full Features) | EXPERT+ Full Diagnostics | Single-acting / Double-acting | ATEX Ex ia / Ex d / SIL-3 | 3730-3100000010000[cite: 12] |
| Type 3730-4 | PROFIBUS PA Protocol | EXPERT+ Fieldbus Suite | Single-acting / Double-acting | ATEX Ex ia / FISCO | 3730-4100000010000[cite: 12] |
| Type 3730-5 | FOUNDATION Fieldbus | EXPERT+ Fieldbus Suite | Single-acting / Double-acting | ATEX Ex ia / FISCO | 3730-5100000010000[cite: 12] |
| Type 3730-6 | HART 7 + Pressure Sensors | EXPERT+ Advanced Pressure | Single-acting / Double-acting | ATEX Ex ia / SIL-3 PST | 3730-6100000010000[cite: 12] |
Mechanical Positioner to Samson Type 3730 Smart Digital Upgrade Guide
Direct replacement guide for upgrading high-maintenance analog positioners or failing smart positioners to the reliable Samson Type 3730 platform[cite: 12]:
| Legacy / Analog Positioner | Operational & Diagnostic Disadvantages | Current Samson Type 3730 Upgrade | Key Diagnostic & Process Advantages |
|---|---|---|---|
| Analog Mechanical Positioner (Friction Cam) | Vibration sensitivity, mechanical wear, and hours spent manually tuning zero/span screws | Samson Type 3730-2 / 3730-3 Smart Digital Push-and-Turn Auto Tuning | One-knob automatic commissioning initializes stroke length, tunes PID gain, and eliminates mechanical cam drift[cite: 12]. |
| Unmonitored Valve in Critical ESD Safety System | Unable to verify safety valve operation without shutting down production lines | Samson Type 3730-3 / 3730-6 with EXPERT+ Partial Stroke Test (PST) | Automated Partial Stroke Testing verifies emergency valve movement online without interrupting process flow[cite: 12]. |
| Positioner with High Instrument Air Bleed | High steady-state pneumatic air leakage increasing utility power costs | Samson Type 3730 Low Air Consumption <0.06 Nm³/h Air Bleed | Fast-responding internal poppet valves eliminate continuous air leakage, lowering compressor energy consumption[cite: 12]. |
Expert Technical Sourcing & Control Valve Loop Integration Notes
When upgrading valve manifolds or replacing outdated mechanical positioners, switching to Samson Type 3730 digital positioners provides immediate operational benefits: one-knob automatic calibration, HART/Fieldbus predictive diagnostic integration (EXPERT+), online Partial Stroke Testing, near-zero steady-state air consumption, and universal NAMUR / Type 3277 integrated mounting[cite: 12]. Simply provide us with your complete 17-digit VARIO positioner model code, current valve serial number, or mounting interface parameters, and our technical engineering team will deliver a 100% compliant replacement specification and proposal[cite: 12].
Core Benchmark Model Standard Configurations
- Type 3730-0100000000000 (Analog Digital)[cite: 12]
- Type 3730-2100000010000 (HART Ex ia)[cite: 12]
- Type 3730-3100000010000 (HART EXPERT+)[cite: 12]
- Type 3730-3100000020000 (HART Ex d)[cite: 12]
- Type 3730-4100000010000 (PROFIBUS PA)[cite: 12]
- Type 3730-5100000010000 (Fieldbus)[cite: 12]
- Type 3730-6100000010000 (Pressure PST)[cite: 12]
- Samson 3730 HART Positioner 4-20mA[cite: 12]
- Samson 3730 EXPERT+ Diagnostic Suite[cite: 12]
- Samson 3730 Type 3277 Integrated Mount[cite: 12]
- Samson 3730 NAMUR Rib Mounting Kit[cite: 12]
- Samson 3730 Rotary VDI/VDE 3845 Kit[cite: 12]
- Samson Type 3725 Compact Positioner[cite: 12]
- Samson Type 3241 Globe Control Valve[cite: 12]
- Samson Type 3277 Pneumatic Actuator[cite: 12]
- Samson Partial Stroke Test Positioner[cite: 12]
- Samson SIL-3 Safety Positioner[cite: 12]
- Samson Low Air Consumption Positioner[cite: 12]
- Samson Positioner Calibration Sourcing[cite: 12]
- WE DRIVE HK Samson Positioner Supplier[cite: 12]
