Siemens MVL661.25-6.3 Refrigeration valve 7.3 Cv (1 in)

Product Description

Siemens MVL661.25-6.3 is a hermetically sealed two-port refrigeration valve for modulating control of chillers and heat pumps. The valve features steel trim, a 1 in connection with a 7.3 Cv flow coefficient, and 0 to 10 V control capability. It provides integrated actuator electronics with position feedback and is designed for medium temperatures from -40 to 120 C and IP65 protection.

• Hermetically sealed 2-port refrigeration valve with steel trim and 1 in connection (DN25 equivalent).
• Control and actuator: 0 to 10 V control signal; selectable positioning signals and position feedback via integrated electronics.
• Operating range: medium temperature -40 to 120 C, permissible operating pressure up to 4500 kPa, IP65 degree of protection.

Product Highlights

Modulating 2-port refrigeration valve, 7.3 Cv, 1 in connection, 0-10 V control, integrated position feedback, IP65, -40 to 120 C

Product Information

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: MVL661.25-6.3
• Country of Origin: Germany

Technical Specifications

• Brand: Siemens
• Manufacturer Part Number: MVL661.25-6.3
• Product Type: Two-port refrigeration valve
• Valve Function: Modulating / linear characteristic
• Connection / Size: 1 in (DN25, internal solder connection listed in some sources)
• Flow Coefficient (Cv): 7.3 Cv
• kvs: 6.3 m3/h (reduced 4 m3/h selectable via DIP switch)
• Material - Body: Steel (PS45 stainless steel noted in some sources)
• Material - Internal: CrNi steel / brass
• Number of Ports: 2
• Control Signal: DC 0...10 V (primary); selectable DC 2...10 V, DC 0...20 mA, DC 4...20 mA
• Operating Voltage: 24 VAC; 20-30 VDC (AC/DC 24 V noted)
• Position Feedback: Available via integrated electronics (DC 0-10 V, 0-20 mA, 2-10 V, 4-20 mA options)
• Actuator Type: Integrated power electronic / magnetic actuator with spring return (A->AB closed)
• Degree of Protection: IP65
• Medium Temperature Range: -40 to 120 C (-40 to 248 F)
• Permissible Operating Pressure: 4500 kPa
• Maximum Differential Pressure (Delta p max): 2500 kPa
• Leakage Rate: 0.002% of kvs
• Mounting Position: Upright to horizontal
• Positioning Time: 1 s
• Stroke Resolution: 1:1000
• Suitable Refrigerants: R22, R134a, R404A, R407C, R410A, R507, R744 (CO2); not suitable for flammable refrigerants
• Dimensions (W x H x D): 5.51 x 10.87 x 4.02 in
• Standards / Certifications: CE; EN 10204 (type 2.2); RCM
• Country of Origin: Germany (listed in some sources)