The difference between the Siemens 2 port Globe valves VVG41 and VVG44 valves lies primarily in their control type and intended application. Here’s a breakdown:

The difference between the Siemens VVG41 and VVG44 valves lies primarily in their control type and intended application. Here’s a breakdown:

VVG41 – 2-Way Control Valve (Standard Range)

• Type: 2-way valve
• Control: Typically on/off or floating control
• Operation: Designed for use with thermal or electro-mechanical actuators
• Application: General HVAC water systems – chilled or heating water
• Connection: Internally threaded (usually Rp thread)
• Body Material: Often bronze or brass
• DN Sizes: Commonly DN15 to DN50
• Pressure Rating: PN16 or similar

VVG44 – 2-Way Control Valve (High-Performance Range)

• Type: 2-way valve
• Control: Designed for modulating control
• Operation: Paired with electronic modulating actuators (e.g., SAX, SKD/SKP)
• Application: More precise flow control needed – typically used in systems requiring accurate temperature regulation
• Connection: Also usually internally threaded
• Body Material: Higher-grade materials (often bronze or special alloys)
• Flow Characteristic: Often equal percentage
• Pressure Rating: Higher precision, may have tighter leakage rates and stroke tolerances

Quick Summary:

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