The Siemens VVF63.25-8 two-way valve is designed for flow regulation in heating and cooling systems, district heating, and air handling units. It is characterised by high durability and precision in controlling the flow of liquid media in both closed and open hydraulic circuits.

DN 25

Nominal Diameter

PN 40

Maximum Operating Pressure

Kvs 8 m³/h

High Flow Coefficient

For Heating and Cooling

Universal Application

Features:

• Material: Valve body made of cast steel GP240GH
• Nominal Diameter (DN): 25
• Flow Coefficient (kvs): 8 m³/h
• Maximum Operating Pressure: PN 40
• Operating Temperature Range: -25…220 °C

Applications:

• Flow regulation in heating and cooling systems
• Suitable for media such as water, antifreeze mixtures, brines
• Can be used with steam under specific conditions

Compatible Actuators:

• Supported Electro-Hydraulic Actuators: SKD.., SKB.., SKC..
• Connection Stroke: 20 mm
• Positioning Force: 1000 N (SKD), 2800 N (SKB, SKC)

Additional Technical Information:

• Connection: Flange type 21, design B
• Sealing: FEPM (silicone-free)
• Cavitation Resistance: It is recommended to follow installation guidelines

The Siemens VVF63.25-8 valve is ideal for precise flow regulation in industrial and HVAC applications where high reliability and long service life are essential.