Product Overview
The Siemens VVF53.65-63 is a premium 2-port flanged control valve engineered for precise regulation of hot water, chilled water, and steam in HVAC and industrial process systems. As part of Siemens’ renowned VVF53 series, this valve features a robust cast iron or ductile iron body with a flanged connection, designed to work seamlessly with Siemens electromagnetic actuators (such as the SKD, SKB, or SKC series) for modulating control. Its primary role is to accurately throttle flow in response to a 0–10 V or 4–20 mA control signal, ensuring stable temperature, pressure, or flow control in closed-loop hydronic circuits. The VVF53.65-63 is a direct-acting, pressure-balanced valve that minimizes actuator force requirements while delivering high rangeability and tight shut-off, making it an ideal choice for demanding industrial and commercial building automation applications.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Valve – 2-Port Flanged Control Valve |
| Model Designation | VVF53.65-63 |
| Operating Pressure | Standard Industrial Grade (Up to 1600 kPa / 16 bar) |
| Mounting & Connection | Flanged per ISO 7005-2 / PN16 |
| Nominal Size (DN) | DN65 |
| Flow Coefficient (kvs) | 63 m³/h |
| Stroke | 20 mm |
| Body Material | Cast Iron (EN-GJL-250) or Ductile Iron (EN-GJS-400-18-LT) |
| Trim Material | Stainless Steel / Brass |
| Seat Leakage | Class IV (0.01% of kvs) |
| Rangeability | > 50:1 |
| Medium Temperature | -10 °C to +150 °C (with appropriate actuator) |
Engineering Features & Advantages
- Precision Performance: The hydraulic valve – 2-port flanged control valve delivers precise, repeatable performance with low hysteresis and stable control across the full working range.
- Industrial Reliability: Constructed for continuous duty with durable, corrosion-resistant materials and proven engineering for maximum system uptime.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original SIEMENS standards, allowing straightforward retrofit into existing hydraulic systems without rework.
- Rated Capability: Rated for pressure ratings of standard Industrial Grade (Up to 1600 kPa / 16 bar), supporting stable operation across the full working range.
Typical Industrial Applications
The VVF53.65-63 is a direct-acting, pressure-balanced valve that minimizes actuator force requirements while delivering high rangeability and tight shut-off, making it an ideal choice for demanding industrial and commercial building automation applications.
PRODUCT IMAGES


SIEMENS VVF53.65-63 2-Port Flanged Control Valve
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- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
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- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine SIEMENS VVF53.65-63 2-Way Modulating Control Valve. This Germany-made DN65 valve features a high-performance equal-percentage plug, delivering leak-free, reliable fluid control for heavy-duty industrial systems.