SAMSON Type 3321 regulating valve process control valve

As one of the core product lines of SAMSON of Germany, SAMSON 3730-6 has significant technical advantages in the field of industrial process control. Combining the latest industry application dynamics and technical characteristics, the following is an explanation from three dimensions: in-depth technical analysis, cutting-edge application scenarios and localized service support:

I. In-depth technical analysis

1. Intelligent control core upgrade

Positioner technology iteration: Standard SAMSON 3730-3 intelligent positioner, supporting HART 7.0 protocol and OPC UA communication, can realize real-time digital monitoring of valve status. In 2025, AI predictive maintenance function will be added, which collects vibration, temperature and other data through built-in sensors, and combines machine learning algorithms to warn potential faults (such as valve core wear and diaphragm aging) 72 hours in advance.

Partial stroke detection (PST) optimization: For safety-critical systems (such as petrochemical ESD emergency cut-off), 3730-6 can be equipped with SIL 4 level solenoid valve module to support online partial stroke testing. During the test, the valve automatically resets after closing to 15% of the stroke, and the entire process takes only 30 seconds, ensuring the reliability of the valve in emergency situations and meeting the requirements of the IEC 61508 standard.

2. Material and structural innovation

Corrosion-resistant solution: In response to the GMP standard of the pharmaceutical industry, 3730-6 provides 316L stainless steel + electropolishing treatment (surface roughness Ra≤0.8μm), and is FDA-certified, suitable for precise control of sterile media (such as bioreactor buffer).

High temperature and high pressure adaptability: In the 600℃ supercritical thermal power scenario, the Inconel 625 alloy valve core + graphite packing is used, combined with a double-layer bellows seal design, which can withstand a pressure difference of 100MPa, and the leakage level reaches the API 624 zero leakage standard.

Common models SAMSON 3321

SAMSON 3321 has many models and derivative types, the most common ones are 3321-IP, 3321-PP, 3321-E1, 3321-E3, etc. The specific introduction is as follows:

3321-IP: There are different specifications, such as large DN50 with 3725 positioner, and DN65 and larger sizes with 3725 positioner.

3321-PP: It is a model in the 3321 series. The specific characteristics are not announced in detail. It is usually suitable for liquid, gas and steam media like other 3321 models.

3321-E1: It is an electric-related model in the 3321 series. The specific function may be related to the electric control characteristics. There are no more detailed technical parameters disclosed at present.

Model 3321-E3: Electric stop valve with Model 3374 electric actuator, suitable for 230V/50Hz power supply.

In addition, there are models that meet ANSI and DIN standards, depending on the connection standard. The ANSI standard model has a pressure level of 125 to 300, and the DIN standard model has a pressure level of PN16, PN40, etc.