Samson 6493 Process Controller Industrial Automation Control Valve Controller
SAMSON Type 6493 Controller Product Overview The SAMSON Type 6493 is a pneumatic differential pressure controller used for maintaining a constant differential pressure between two points in a process system. It is a classic, force-balance type controller with a diaphragm measuring system. No electricity is required — it uses only supply air to produce a pneumatic output signal. Many older plants and safety-critical systems still use it because of its simplicity, high
The SAMSON Type 6493 is a pneumatic differential pressure controller used for maintaining a constant differential pressure between two points in a process system. It is a classic, force-balance type controller with a diaphragm measuring system. No electricity is required — it uses only supply air to produce a pneumatic output signal. Many older plants and safety-critical systems still use it because of its simplicity, high reliability and long service life in harsh environments.
| Parameter | Specification |
|---|---|
| Type | Pneumatic differential pressure controller |
| Measuring Principle | Force-balance with diaphragm measuring unit |
| Set Point Range | 0.02–2 bar / 0.3–29 psi (depending on springs) |
| Supply Air Pressure | 1.4 bar ±0.1 bar (20 psig ±1.5 psi) |
| Output Signal | 0.2–1.0 bar (3–15 psig) |
| Proportional Band | Adjustable (typically 2–200 %) |
| Reset Time | Adjustable (typically 0.1–30 min) |
| Ambient Temperature | –20 … +80 °C (–4 … +176 °F) |
| Degree of Protection | IP 54 |
| Body Material | Aluminum or stainless steel (optional) |
| Connections | Threaded or flanged |
- Steam distribution systems (differential pressure control)
- Pump bypass and recirculation lines
- Heat exchanger differential pressure control
- Tank blanketing and pressure equalization
- Older pneumatic control loops in refineries, power plants and chemical facilities
- Problem: Slow response or hunting → Solution: Adjust proportional band and reset time carefully
- Problem: Dirt in supply air → Solution: Install upstream filter-regulator (standard recommendation)
- Problem: Zero drift over time → Solution: Periodic recalibration of setpoint springs
- Current SAMSON Type 6493 (still in production)
- Older SAMSON 6493 variants
- Comparable: SAMSON Type 2405 / 2412 pneumatic regulators (for related pressure tasks)
- Genuine SAMSON factory product with calibration certificate
- Local technical support & loop tuning assistance
- Fast spare parts availability (diaphragms, springs)
- Competitive pricing with full warranty
- Standard models (common set point ranges): in stock or 4–6 weeks
- Special configurations (high pressure, stainless body): 6–8 weeks
Please provide the following (we usually reply within 24 hours):
- Required set point range (differential pressure)
- Supply air pressure available
- Process medium & temperature
- Connection type (threaded / flanged)
- Quantity & target delivery date
- Any special requirements (Ex version, etc.)
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