SAMSON 4763-01100321000000.04

SAMSON 4763 Electropneumatic Positioner

Description

The SAMSON Type 4763 is a single-acting electropneumatic positioner engineered for high-precision control of pneumatic valve actuators. It translates a 4 to 20 mA DC input signal from a controller into a proportional pneumatic output pressure, ensuring accurate valve positioning. This robust unit is designed for demanding industrial environments and is a key component in process control loops.

Specifications

• Manufacturer: SAMSON
• Type: 4763 Electropneumatic Positioner
• Action: Single-acting
• Input Signal: 4 to 20 mA
• Max. Supply Pressure: 6 bar / 90 psi
• Pneumatic Connections: Standardized for industrial fittings
• Housing Material: Die-cast aluminum

Label Info

• Model: 4763-01100321000000.04
• Serial No: 607108
• Var.-ID: 1008581

Application

Ideal for controlling final control elements in industries such as chemical processing, oil and gas, power generation, and water treatment. It can be mounted on various linear or rotary actuators to regulate flow, pressure, temperature, or liquid levels.

Country of Origin

Made in Germany.

CO2 Impact

Opting for this pre-owned positioner avoids approximately 80.0 kg of CO2 emissions compared to manufacturing a new one, contributing to a more sustainable industrial operation.

Availability

This unit is an obsolete model but is available from our stock. It serves as a direct replacement for existing installations, preventing costly system upgrades. Order now from spareparts2day for expert support and fast delivery.

FAQ

Question?
What is the main difference between a single-acting and a double-acting positioner?
Answer:

A single-acting positioner, like this Type 4763, controls the air pressure to one side of the actuator’s piston or diaphragm, using a spring for the return stroke. A double-acting positioner controls the air supply to both sides of the piston, allowing for powered control in both directions, which is often used for larger valves or when faster stroking speeds are required.

Question?
How do I calibrate the SAMSON 4763 for my specific valve actuator?
Answer:

Calibration involves adjusting the zero and span settings. The zero adjustment sets the start point of the valve travel (e.g., at 4 mA), and the span adjustment sets the full range of travel (e.g., at 20 mA). This is typically done using adjustment screws or knobs on the positioner while monitoring the input signal and the physical position of the valve stem.

Question?
Can this 4-20 mA positioner be used with older 3-15 psi pneumatic controllers?
Answer:

No, not directly. This is an i/p (current-to-pneumatic) positioner that requires a 4-20 mA electrical signal. To use it with a p/p (pneumatic-to-pneumatic) controller outputting 3-15 psi, you would need a separate P/I (pressure-to-current) transducer to convert the pneumatic signal into a 4-20 mA electrical signal first.

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Last Update: Friday, March 13, 2026