SAMSON digital positioners

Valve Positioners

SAMSON digital positioners are single-acting or double-acting positioners for attachment to pneumatic linear or rotary actuators. 

Due to their digital signal processing technology, these positioners have the following advantages over conventional positioners: 

. Simple operation 

. LCD with rotatable reading direction 

. Automatic zero and span calibration during initialization (except for Type 3730-0) 

. Automatic detection of faults in the actuator 

. Direction of action independent of mounting position 

. Continuous monitoring of zero point 

. Low air consumption 

. Permanent storage of all parameters in EEPROM (protected against power failure)

The Types 3730-3, 3730-6 and 3731-3 Positioners also allow HART® communication between the field and process control level. 

The Type 3730-4 Positioner allows the integration of the final control element into a PROFIBUS® PA network

The Types 3730-5 and 3731-5 Positioners can communicate over a FOUNDATION™ fieldbus network.

Series 3725 Type 3725 Electropneumatic Positioner 

Application 

Single-acting positioner for attachment to pneumatic globe and rotary valves. Self-calibrating, automatic adaptation to valve and actuator. Reference variable 4 to 20 mA 

Travel 3.75 to 50 mm 

Opening angles 24 to 100°

Version: 

 Electropneumatic positioner with on-site operation and LCD 

– Type 3725-000, without explosion protection 

– Type 3725-110, explosion protection according to ATEX, STCC 

– Type 3725-113, explosion protection according to GOST 

– Type 3725-130, explosion protection according to CSA

Series 3730 Type 3730-1 Electropneumatic Positioner

Application 

Single-acting or double-acting positioner for attachment to pneumatic control valves. Self-calibrating, automatic adaptation to valve and actuator. 

Set point 4 to 20 mA 

Travels 3.75 to 200 mm 

Opening angle 24 to 100°

Type 3730-1: electropneumatic positioner with on-site operation and LCD

Series 3730 Type 3730-2 Electropneumatic Positioner

Application 

Single-acting or double-acting positioner for attachment to pneumatic control valves. Self-calibrating, automatic adaptation to valve and actuator. 

Set point  4 to 20 mA 

Valve travel  3.6 to 300 mm 

Opening angle  24 to 100°

Type 3730-2. Electropneumatic positioner for control valves, on-site operation, local communication with SSP interface, EXPERTplus diagnostics

Series 3730 Type 3730-4 Electropneumatic Positioner with PROFIBUS-PA communication

Application 

Positioners for attachment to pneumatic control valves 

Valve travel from 3.6 to 300 mm.  Opening angle 24 to 100° 

Smart, bus-powered field device complying with PROFIBUS-PA specifications based on IEC 61158-2 transmission technology.

Series 3730 Type 3730-5 Electropneumatic Positioner with FOUNDATION™ fieldbus communication

Application Positioners for attachment to pneumatic control valves Valve 

travel from 3.6 to 300 mm.  Opening angle 24 to 100° 

Smart, bus-powered field device complying with FOUNDATION™ fieldbus specifications based on IEC 61158-2 transmission technology.

Series 3730 Type 3730-6 Electropneumatic Positioner with HART® communication and pressure sensors

Application

Single-acting or double-acting positioner for attachment to pneumatic control valves. Self-calibrating, automatic adaptation to valve and actuator. 

Set point 4 to 20 mA 

Valve travel 3.6 to 300 mm 

Opening angle 24 to 100°

Versions 

– Type 3730-6.  Electropneumatic positioner for control valves, HART® communication, on-site operation, local communication with SSP interface, EXPERTplus diagnostics, pressure sensors to monitor the supply air and signal pressure .

– Type 3730-3. Electropneumatic positioner same as Type 3730-6, without pressure sensors.

Series 3731 Type 3731-3 Electropneumatic Ex d Positioner with HART® communication

Application 

Single-acting or double-acting Ex d positioner for attachment to pneumatic control valves. Self-calibrating, automatic adaptation to valve and actuator. 

Set point 4 to 20 mA 

Valve travel 3.6 to 200 mm 

Opening angle 24 to 100°

Electropneumatic positioner with LCD, on-site operation, local communication with SSP interface, diagnostics.

Series 3731 Type 3731-5 Electropneumatic Ex d Positioner with FOUNDATIONTM fieldbus communication

Application 

Positioners for attachment to pneumatic control valves 

Rated travels from 3.6 to 200 mm.  Opening angle 24 to 100° 

Smart, bus-powered field device complying with FOUNDATIONTM fieldbus specifications based on IEC 61158-2 transmission technology. Integrated function blocks: PID process controller, analog output (AO), one binary input for DC voltage signals (DI1) or for connection of one floating contact (DI2).

The Type 3731-5 Positioner communicates according to FOUNDATION™ fieldbus specification with field devices, programmable logic controllers and process control systems. An integrated PID function block allows the control of process variables required directly in the field. The shift to distributed control reduces the number of control tasks to be performed by the higher-level automation system.

Series 3730 Type 3730-0 Electropneumatic Positioner

Application 

Single-acting or double-acting positioner for attachment to pneumatic control valves 

Set point 4 to 20 mA.  Travel 5.3 to 200 mm

Type 3766 Pneumatic Positioner 

Type 3767 Electropneumatic Positioner

Application 

Single-acting or double-acting positioners for attachment to pneumatic control valves. These positioners use a pneumatic input signal from 0.2 to 1 bar or 3 to 15 psi (Type 3766) or an electric input signal from 0/4 to 20 mA or 1 to 5 mA (Type 3767). 

Rated travels from 7.5 to 120 mm or opening angles up to 90°

Type 4763 Electropneumatic Positioner 

Type 4765 Pneumatic Positioner

Application 

Single-acting positioners for attachment to pneumatic control valves. These positioners use an electric input signal from 0/4 to 20 mA or 1 to 5 mA (Type 4763) or a pneumatic input signal from 0.2 to 1 bar (3 to 15 psi) (Type 4765). 

Rated travels from 7.5 to 90 mm

A Type 4765 Pneumatic Positioner can be upgraded to a Type 4732 Electropneumatic Positioner.

Versions: 

Type 4763-0.  Electropneumatic positioner, without explosion protection 

Type 4763-1. Electropneumatic positioner for hazardous areas Input circuit II 2G Ex ia IIC T6 Gb according to ATEX Type 4763-8 · Electropneumatic positioner in in Ex nA (non-sparking) 

Type 4765/6116. Electropneumatic positioner with type of protection "Flameproof enclosure" Ex d with Type 6116 i/p Converter.

Type 4765. Pneumatic positioner with 0.2 to 1 bar (3 to 15 psi) reference variable

Datasheets:

Series 3725 Type 3725 Electropneumatic Positioner

Series 3730 Type 3730-1 Electropneumatic Positioner

Series 3730 Type 3730-2 Electropneumatic Positioner

Series 3730 Type 3730-4 Electropneumatic Positioner with PROFIBUS-PA communication

Series 3730 Type 3730-5 Electropneumatic Positioner with FOUNDATION™ fieldbus communication

Series 3730 Type 3730-6 Electropneumatic Positioner with HART® communication and pressure sensors

Series 3731 Type 3731-3 Electropneumatic Ex d Positioner with HART® communication

Series 3731 Type 3731-5 Electropneumatic Ex d Positioner with FOUNDATIONTM fieldbus communication

Series 3730 Type 3730-0 Electropneumatic Positioner

Type 3766 Pneumatic Positioner & Type 3767 Electropneumatic Positioner

Type 4763 Electropneumatic Positioner & Type 4765 Pneumatic Positioner