Siemens Maxum II Model 50 Ten-Port Valve 2017660-003

Overview: The Core Switching Valve for Sample Introduction

The Siemens Maxum II Model 50 Ten-Port Valve, part number 2017660-003, is an air-actuated diaphragm valve purpose-built for the Siemens line of process gas chromatographs, performing the sample introduction and column-switching functions that define each analytical cycle. As a ten-port configuration, the Model 50 valve can route sample and carrier gas streams through multiple simultaneous flow paths, enabling functions such as sample injection, column backflush, and column isolation within a single compact valve body.

As an independent specialized supplier of Siemens Maxum Edition II analyzer spare parts, Seven Star LLC sources and supplies the Model 50 valve 2017660-003 to refineries, gas plants, and petrochemical complexes across Oman and the wider GCC. Because this valve is central to every analytical cycle the GC performs, Seven Star LLC helps maintenance teams keep genuine replacement valves in stock to avoid extended analyzer downtime.

Working Principle: Multi-Port Diaphragm Switching

The Model 50 valve uses a diaphragm-based switching mechanism in which pneumatic actuation air deflects a diaphragm across the valve’s internal port pattern, simultaneously connecting or isolating multiple flow paths in a single actuation stroke. This ten-port design allows the valve to redirect sample and carrier gas between the separation column, sample loop, and detector paths in a single coordinated switching event, which is what allows a process GC to execute repeatable, precisely timed injection and backflush sequences cycle after cycle.

Because the diaphragm isolates the pneumatic actuator from the process gas path, the valve avoids the wear and leak points associated with rotary or piston-type multiport valves, an important characteristic for a component that may be actuated many thousands of times over its service life. Actuation air is supplied from the analyzer’s Solenoid Valve Control Module (SVCM) on precisely timed commands from the system controller, synchronizing valve switching with the overall chromatographic method.

Engineering Design of the Model 50 Valve

The 2017660-003 valve is built to the Model 50 ten-port configuration standard used across the Siemens Maxum and Maxum Edition II process GC platforms, with a compact body designed for direct mounting within the analyzer’s valve manifold. Port connections are arranged to match the analyzer’s existing plumbing configuration for straightforward like-for-like replacement.

Given the valve’s role in defining the analytical method’s timing and flow paths, Siemens documentation recommends that maintenance personnel without specific training in Model 50 valve repair return the valve for factory service rather than attempting field disassembly, reflecting the precision required in the valve’s internal diaphragm and seat geometry to maintain consistent switching performance.

Key Features

The Model 50 Ten-Port Valve 2017660-003 delivers the precise, repeatable switching that process gas chromatography depends on. Key characteristics include:

• Ten-port diaphragm valve configuration enabling simultaneous multi-path switching in a single actuation.
• Air-actuated design compatible with the analyzer’s SVCM pilot-air control architecture.
• Supports sample injection, column backflush, and column isolation functions within the analytical cycle.
• Diaphragm-based construction avoids wear and leak points common to rotary or piston-type valves.
• Genuine Siemens part number for correct fit across the Maxum and Maxum Edition II platforms.

Industrial Applications

The Model 50 valve is a core component in virtually every Siemens Maxum Edition II analytical method, used across refinery unit monitoring, natural gas quality and custody transfer analysis, and petrochemical process streams wherever precise, repeatable sample injection and column switching are required. Because it directly defines the chromatographic method’s flow path timing, valve condition has a direct bearing on chromatographic peak shape, retention time repeatability, and overall data quality.

Seven Star LLC supports refinery instrumentation teams, gas processing operators, and petrochemical maintenance departments across Oman, Muscat, Sohar, and the broader GCC region with sourcing of Model 50 valves and related Maxum Edition II sampling system hardware, helping analyzer houses maintain consistent, high-quality chromatographic data.

Technical Specifications

The table below summarizes the core specifications of the Siemens Maxum II Model 50 Ten-Port Valve as supplied by Seven Star LLC.

Call To Action

Seven Star LLC is a dedicated supplier of Siemens Maxum Edition II process gas chromatograph spare parts and switching valves throughout Oman and the GCC. To request a formal B2B quotation, verify current stock availability, or confirm compatibility of the Model 50 Ten-Port Valve 2017660-003 with your specific Maxum II configuration, contact our instrumentation sourcing team today.