We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

Siemens Hydronic Zone Valve: 0.63 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return - 2-Way NPT Connection Zone Valves
Siemens2-Way NPT Connection Zone Valves

Siemens Hydronic Zone Valve: 0.63 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return

The Siemens Hydronic Zone Valve (SKU 3G-OTH-69774) is a 2-way, 1/2 in female NPT connection zone valve with a 0.63 Cv flow rate. It features a non-spring return, normally closed (NC) electric actuator operating at…

SKU 3G-OTH-69774

Also listed as: 25902002 · 259 02002

Brand
Siemens
Item
Hydronic Zone Valve: 0.63 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return
Category
2-Way NPT Connection Zone Valves
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Siemens
Manufacturer Part Number
259-02002
Type
2-Way, Non-Spring Return, NC, Electric
Female NPT
1/2 in
Actuator Voltage
24V AC

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens Hydronic Zone Valve (SKU 3G-OTH-69774) is a 2-way, 1/2 in female NPT connection zone valve with a 0.63 Cv flow rate. It features a non-spring return, normally closed (NC) electric actuator operating at 24V AC (MPN 259-02002).

Frequently Asked Questions

What is the Siemens 259-02002 hydronic zone valve used for?

The Siemens 259-02002 is a 2-way, normally closed hydronic zone valve used in HVAC systems to control hot or chilled water flow to individual zones. It is commonly applied in commercial and residential hydronic heating and cooling systems for precise temperature regulation.

What are the specifications of the Siemens 259-02002 zone valve?

The Siemens 259-02002 is a 2-way, non-spring return, normally closed electric zone valve with a 1/2 in female NPT connection and a 0.63 Cv flow rate. Its actuator operates at 24V AC. The valve is designed for hydronic applications and is manufactured by Siemens.

Where to buy the Siemens 259-02002 zone valve worldwide?

You can source the Siemens 259-02002 zone valve through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this Siemens hydronic valve.

How to install a Siemens 259-02002 hydronic zone valve?

Install the Siemens 259-02002 by connecting the 1/2 in female NPT ports to the piping system. Wire the 24V AC actuator per the wiring diagram, ensuring the normally closed valve opens when power is applied. Mount the valve in the correct flow direction and test for leaks before system startup.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens 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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
Hydronic Zone Valve: 0.63 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NO, Electric (MPN 259-02032)
Siemens
Hydronic Zone Valve: 0.63 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NO, Electric (MPN 259-02032)
Hydronic Zone Valve: 1 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NC, Electric (MPN 259-02004)
Siemens
Hydronic Zone Valve: 1 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NC, Electric (MPN 259-02004)
Hydronic Zone Valve: 2.5 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NC, Electric (MPN 259-02008)
Siemens
Hydronic Zone Valve: 2.5 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NC, Electric (MPN 259-02008)
Hydronic Zone Valve: 0.4 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NO, Electric (MPN 259-02030)
Siemens
Hydronic Zone Valve: 0.4 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NO, Electric (MPN 259-02030)
Hydronic Zone Valve: 4 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NO, Electric (MPN 259-02041)
Siemens
Hydronic Zone Valve: 4 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NO, Electric (MPN 259-02041)
Hydronic Zone Valve: 0.63 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NO, Electric (MPN 254-01117)
Siemens
Hydronic Zone Valve: 0.63 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NO, Electric (MPN 254-01117)

More from Siemens

View all Siemens parts
Hydronic Zone Valve: 1.6 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NC, Electric (MPN 259-02006)
Siemens
Hydronic Zone Valve: 1.6 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NC, Electric (MPN 259-02006)
Pneumatic Control Valve: 2.5 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Spring Return, NC, Pneumatic (MPN 256-02008)
Siemens
Pneumatic Control Valve: 2.5 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Spring Return, NC, Pneumatic (MPN 256-02008)
Hydronic Zone Valve: 0.4 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NC, Electric (MPN 259-02000)
Siemens
Hydronic Zone Valve: 0.4 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NC, Electric (MPN 259-02000)
Hydronic Zone Valve: 0.4 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NO, Electric (MPN 254-01115)
Siemens
Hydronic Zone Valve: 0.4 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NO, Electric (MPN 254-01115)
Zone Valve: 6.3 Cv Flow Rate, 2-Way, 3/4 in Female Union NPT/3/4 in Male Union NPT, Spring Return (MPN 257-02045)
Siemens
Zone Valve: 6.3 Cv Flow Rate, 2-Way, 3/4 in Female Union NPT/3/4 in Male Union NPT, Spring Return (MPN 257-02045)
Pneumatic Control Valve: 2.5 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Spring Return, NO, Pneumatic (MPN 257-02038)
Siemens
Pneumatic Control Valve: 2.5 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Spring Return, NO, Pneumatic (MPN 257-02038)
Threaded Globe Valve: 4.1 Cv Flow Rate, 2-Way, 3/4 in Female NPT, Spring Return, NO, On/Off Signal (MPN 243-00212)
Siemens
Threaded Globe Valve: 4.1 Cv Flow Rate, 2-Way, 3/4 in Female NPT, Spring Return, NO, On/Off Signal (MPN 243-00212)
Hydronic Zone Valve: 1 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NO, Electric (MPN 259-02034)
Siemens
Hydronic Zone Valve: 1 Cv Flow Rate, 2-Way, 1/2 in Female NPT, Non-Spring Return, NO, Electric (MPN 259-02034)