Complete solution for Siemens temperature control valve and Siemens electric control valve in heat exchange station of plate heat exchanger

In the process of designing and selecting bidding for the monitoring system in a heat exchange station, there are common challenges that arise. One of the key issues is the large load capacity of water-to-water heat exchange stations, which leads to larger pipe diameters in the heat source network. This, in turn, makes the selection of electric control valves more complex in terms of brand, performance, and cost. Siemens electric control valves are widely used in plate heat exchangers and heat exchanger systems across China. However, despite their popularity, they face certain limitations, particularly with larger valve sizes. In practical applications, problems such as size constraints have been encountered. This article will explore comprehensive solutions for Siemens thermostat valves and Siemens electric control valves in heat exchange stations. With the shift toward water-based heating systems, the design and selection of control systems for heat exchange stations have become increasingly important. The large diameter of the heat source pipeline has led to significant differences in the choice of electric control valves, including brand selection, performance, and cost considerations. Previously, brands like Danfoss, Honeywell, and domestic alternatives were considered. However, due to the large pipe sizes (e.g., DN150, DN200, DN250, DN300), imported electric control valves come at a high cost—often ranging from tens of thousands to millions of yuan per unit—and have long delivery times. On the other hand, purely domestic valves are cheaper but often face application issues due to bidding policies and implementation practices, limiting their widespread use. Over the years, our company has gained valuable experience in selecting electric control valves for thermal network monitoring projects. We now share these insights with you. From the perspective of brand, cost, and product performance, non-Siemens options have proven to be suitable and well-received in various systems, including reheating and heat exchange applications. However, the selection process can be challenging because Siemens electric control valves are only available up to DN150. For larger valves, alternative solutions must be sought. To address this issue, our company developed an assembled Siemens electric control valve system. What does "assembled" mean? It refers to using Siemens electric actuators to develop and manufacture matching regulating valve bodies. These valves range in size from DN32 to DN250. This solution not only addresses the need for large-diameter electric control valves but also ensures the necessary functionality for real-world applications. Most importantly, it significantly reduces project costs by about 50%. The technical specifications of the Siemens-assembled electric control valve are as follows: **VH Type Two-way and Three-way Flange Connection Electric Control Valve** - **Product Description:** - Suitable for chilled water, cooling water, low-pressure hot water, low-temperature hot water, and high-temperature hot water in HVAC closed-loop systems. - Suitable for ethylene glycol with a concentration of up to 50%. - Precision casting (resin sand). - Complies with ISO 7005 flange connection standards. - Meets the special equipment manufacturing license requirements of the China National Quality and Technical Supervision Bureau. - Pressure-balanced valve body ensures high shut-off capability under low force and high pressure difference. - **Technical Parameters:** - Nominal pressure: PN 16 - Stroke: DN40–DN100: 20mm; DN100–DN150: 40mm - Leakage: 0...0.02% Kvs - Medium temperature: -25...+130°C - Flow characteristics: Equal percentage - Material: Body – HT250, Stem – Stainless Steel, Disc – Stainless Steel **Flow Tables:** - **Two-way Flange Connection, 20mm Stroke:** - VVHT40.22: DN40 / 19 m³/h - VVHT50.22: DN50 / 31 m³/h - VVHT65.22: DN65 / 49 m³/h - VVHT80.22: DN80 / 78 m³/h - VVHT100.22: DN100 / 110 m³/h - **Two-way Flange Connection, 40mm Stroke:** - VVHT100.24: DN100 / 124 m³/h - VVHT125.24: DN125 / 200 m³/h - VVHT150.24: DN150 / 300 m³/h - **Three-way Flange Connection, 20mm Stroke:** - VVHT40.32: DN40 / 19 m³/h - VVHT50.32: DN50 / 31 m³/h - VVHT65.32: DN65 / 49 m³/h - VVHT80.32: DN80 / 78 m³/h - VVHT100.32: DN100 / 110 m³/h - **Three-way Flange Connection, 40mm Stroke:** - VVHT100.34: DN100 / 124 m³/h - VVHT125.34: DN125 / 200 m³/h - VVHT150.34: DN150 / 300 m³/h **VQ Type Two-way and Three-way Flange Connection Electric Control Valve** - **Product Description:** - Special steam control valve for district heating systems and air conditioning refrigeration industrial control systems. - Suitable for domestic hot water, high-pressure hot water, hot oil, saturated steam, and low-pressure superheated steam in open or closed circuits. - Features: Precision casting (resin sand), ISO 7005 flange connection, and pressure-balanced valve body. - **Technical Parameters:** - Nominal pressure: PN 16 - Stroke: DN32–DN100: 20mm; DN100–DN250: 40mm - Leakage: 0...0.02% Kvs - Medium temperature: +1...+220°C - Flow characteristics: Equal percentage - Material: Body – Ductile Iron QT400, Stem – Stainless Steel, Disc – Stainless Steel **Flow Tables:** - **Two-way Flange Connection, 20mm Stroke:** - VVQT32.22: DN32 / 16 m³/h - VVQT40.22: DN40 / 19 m³/h - VVQT50.22: DN50 / 31 m³/h - VVQT65.22: DN65 / 49 m³/h - VVQT80.22: DN80 / 78 m³/h - VVQT100.22: DN100 / 110 m³/h - **Two-way Flange Connection, 40mm Stroke:** - VVQT100.24: DN100 / 124 m³/h - VVQT125.24: DN125 / 200 m³/h - VVQT150.24: DN150 / 300 m³/h - VVQT200.24: DN200 / 450 m³/h - VVQT250.24: DN250 / 630 m³/h For more information, visit [http://news.chinawj.com.cn](http://news.chinawj.com.cn). 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