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SAMSON Type 3331 regulating valve is a valve commonly used in process control. It belongs to pneumatic regulating butterfly valve and plays an important role in industrial process control. The following is its introduction:
Features and advantages:
Precise control: As a process control valve, it can accurately adjust the fluid flow, thereby controlling parameters such as pressure and temperature. Equipped with intelligent positioner, some models support HART protocol interface, which is convenient for remote monitoring and precise control, and can meet the needs of various complex industrial process control.
Reasonable structural design: The clamping connection is adopted, which is convenient for installation between pipes and saves space. The valve plate and valve shaft are usually made of stainless steel, which has good corrosion resistance and can adapt to a variety of media and harsh working conditions.
High reliability: It has good stability and durability. For example, in air separation units, it can maintain normal operation even in harsh conditions such as lightning strikes, providing guarantee for the continuous and stable operation of industrial production.
SAMSON Type 3331 regulating valve is a typical representative of pneumatic regulating butterfly valves. Its model system is mainly distinguished by drive mode, standard version and actuator combination.
The following is a detailed model list based on SAMSON official information and industry applications:
1. Basic model and drive mode
Drive type: pneumatic
Standard: ANSI (NPS 4 to 16, Class 150 to 300)
Temperature range: -10°C to 400°C
Features: It adopts a clamping structure, can be adapted to DIN and ANSI flanges, supports fast response regulation, and is suitable for liquid, gas and steam media.
Drive type: electric
Standard: ANSI (NPS 4 to 16, Class 150 to 300)
Temperature range: -10°C to 400°C
Features: Precise control through motor drive, suitable for scenarios with high automation requirements, such as remote monitoring systems.
2. Actuator combination model
3331/3278
Actuator: 3278 pneumatic rotary actuator
Function: Single-acting pneumatic diaphragm actuator, supports fault open/close mode, signal pressure range 0-6 bar, suitable for fast adjustment needs.
Actuator: BR31a-2010 pneumatic rotary actuator
Function: single/double-acting piston actuator, torque range 5-11674 N・m, suitable for extreme temperatures of -40°C to 80°C, accessories connected through VDI/VDE 3845 or NAMUR standard interface.
III. Version and configuration expansion
3331 DIN
Standard: DIN (PN10 to 40)
Material: The valve body can be made of carbon steel or stainless steel, and the valve plate is made of 1.4581 stainless steel, suitable for PN10 to 40 pressure levels.
Special design models
3331-step seated: Step-type sealing disc plate, reducing cavitation and noise, suitable for high pressure difference conditions.
3331-low noise: Low noise design, optimized flow channel structure to reduce fluid noise, suitable for occasions with strict environmental requirements.
3331-extended temperature: Extended temperature version, which can cover the range of -10°C to 400°C through special packing or thermal insulation design.
IV. Accessory combination and selection
Positioner
3730-X: Supports HART, FF, PROFIBUS-PA protocols, with feedback function and explosion-proof certification (Exia IICT6/Exd IICT6).
3725-X: Compact design, suitable for space-constrained scenarios, and can be configured with double-acting actuators.
Filter pressure reducing valve
Material: aluminum alloy or stainless steel, interface 1/4NPT or 1/2NPT, with pressure gauge (0-6.0 bar).
Valve position switch
Material: synthetic resin, aluminum alloy, 316SS stainless steel, supports 4-20mA output and Hart protocol, and the explosion-proof level can be selected as Exia IICT6 or Exd IICT6.
Solenoid valve
Type: 2-position/3-way or 2-position/5-way, voltage 24VDC or 220VAC, explosion-proof material optional 316SS, supports manual reset.
