SAMSON 3331/BR31a-2010 pneumatic rotary actuator

SAMSON 3331/BR31a-2010 pneumatic rotary actuator is a high-performance control component composed of SAMSON 3331 butterfly valve and BR31a-2010 pneumatic rotary actuator. It is designed for harsh industrial environments and is suitable for flow regulation and switch control in the fields of chemical, oil and gas, and power. The following are its core technical features and application details:

I. Technical parameters and design features

BR31a-2010 actuator performance

Torque range: 5 to 11674 Nm, which can cover the driving requirements of valves with diameters from DN100 to DN400.

Signal pressure: Up to 10 bar, far exceeding ordinary diaphragm actuators (such as 6 bar of 3278), suitable for high-pressure conditions.

Temperature range: Standard type - 40°C to + 80°C, optional low temperature (-55°C) or high temperature (+150°C) sealed versions.

Structural design:

Double piston / single-acting spring return: Provides reliable fail-safe function (open or close in case of air failure), and the spring assembly is fully encapsulated to prevent corrosion.

Precision gear transmission: Involute gears are backlash-free to ensure accurate torque transmission, and the rotation angle error is ≤±1°.

Surface treatment: Passed Kesternich sulfur dioxide corrosion test and salt spray test (500 hours), suitable for highly corrosive environments.

3331 butterfly valve features

Body specifications: ANSI Class 150-300 (DN100-DN400), supports clamp-on installation, compatible with DIN and ANSI flanges.

Media compatibility: Suitable for gas, liquid, steam, temperature range -10°C to 400°C, optional wear-resistant coating or special sealing materials.

Flow characteristics: Equal percentage or linear characteristics, high adjustment accuracy, suitable for high pressure difference (such as petrochemical cracking unit) and large flow scenarios.