Siemens Zone Valve: 2.5 Cv Flow Rate, 2-Way, 1/2 in Female Union NPT/1/2 in Male Union NPT
The Siemens Zone Valve (SKU 3G-OTH-69590, MPN 257-02039) is a 2-Way, 1/2 in Female Union NPT/1/2 in Male Union NPT, Spring Return valve with a 2.5 Cv flow rate. As an authorised distributor of Siemens, 3G Electric…
SKU 3G-OTH-69590
Also listed as: 25702039 · 257 02039
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Delivery
- Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
- Ships to
- Singapore
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Product Description
The Siemens Zone Valve (SKU 3G-OTH-69590, MPN 257-02039) is a 2-Way, 1/2 in Female Union NPT/1/2 in Male Union NPT, Spring Return valve with a 2.5 Cv flow rate. As an authorised distributor of Siemens, 3G Electric supplies this valve across 14 industrial departments, with specialist expertise in controls to support your sourcing needs.
Frequently Asked Questions
What is the Siemens 257-02039 zone valve used for?
The Siemens 257-02039 is a 2-way, spring return zone valve used in hydronic HVAC systems to control water flow in heating or cooling zones. It is commonly applied in commercial buildings, district heating, and industrial process loops where reliable on/off or modulating flow regulation is required.
What are the specifications of the Siemens 257-02039 zone valve?
This Siemens zone valve has a 2.5 Cv flow rate, 2-way configuration, and 1/2 in female union NPT by 1/2 in male union NPT connections. It features spring return action for fail-safe operation. The manufacturer part number is 257-02039, and it is designed for use with compatible Siemens actuators.
Where to buy the Siemens 257-02039 zone valve worldwide?
3G Electric supplies the Siemens 257-02039 zone valve worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time; we source and deliver this valve to any international destination.
How to install a Siemens 2-way zone valve?
Install the Siemens 257-02039 zone valve with the flow arrow pointing in the correct direction. Use thread sealant on NPT connections and ensure the valve is mounted in a horizontal or vertical position as recommended. Wire the actuator per Siemens wiring diagrams, and test for proper spring return operation before system startup.
Used in
Common applications for SiemensSiemens Products
3G Electric supplies Siemens 2-way npt connection zone valves. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
