Siemens Combustion VA40.25 Valve & Actuator Assemblies

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The Siemens Combustion VA40.25 Series provides a comprehensive range of pre-engineered, fully integrated Valve and Actuator (VA) assemblies. By combining the high-torque Siemens SQM40.25 actuator with a wide variety of VKP, VKF, VKO control valves, WBV wafer valves, and PBA blower adapters, these complete assemblies eliminate the guesswork of field mounting and linkage adjustments. Designed for heavy-duty industrial combustion and burner management, this massive series offers unparalleled air and fuel ratio control across hundreds of configurations, including specialized 220V variants, custom mounting angles, and internal position feedback options.

Technical Specifications

  • Product Family: Siemens Combustion VA40.25 Series (Complete Assemblies)
  • Actuator Included: Siemens SQM40.25 (Electronic Stepper, Pre-Mounted)
  • Actuator Performance: High-Torque 25-second running time / 90 in-lbs torque
  • Operating Voltage: Available in 120V and 220V/230V AC configurations
  • Valve Compatibility: VKF, VKP, VKO, WBV, and PBA Manifolds
  • Applications: High-Capacity Fuel/Air Ratio Control, Premix Blowers, Industrial Boilers

Key Features & Benefits

  • Ready-to-Install Assemblies: Each VA40.25 unit arrives factory-assembled with engineered brackets and rigid couplings to ensure zero backlash and perfect shaft alignment right out of the box.
  • High-Torque Actuation: The “.25” motor profile utilizes a heavy-duty 25-second (90-degree) gearing system, outputting an impressive 90 in-lbs of turning force to easily manage larger valve bodies or higher pressure differentials.
  • Dual-Voltage & “V” Series Variants: This catalog features specific “(220)” models for international control systems, as well as “V” models which include specific internal electronic variants—such as an integrated feedback potentiometer—for precise analog position monitoring.
  • Wafer Butterfly Valve (WBV) Integration: This specific catalog includes WBV variants, allowing for ultra-compact, between-flange installations on high-capacity industrial gas lines.
  • Custom Mounting Angles: Many models feature “-90” or “180” designations, indicating that the actuator is factory-mounted at a specific offset angle relative to the valve body to accommodate tight clearance installations in complex burner cabinets.
VA40.25 Parts We Provide
VA40.25(220)-0.5-0.5VKP-0.5
VA40.25(220)-0.5-1.0VKP-0.5
VA40.25(220)-0.5R-0.75VKP-0.5R
VA40.25(220)-0.5R-1.0VKP-0.5R
VA40.25(220)-0.75-0.5VKP-0.5
VA40.25(220)-0.75-0.5VKP-0.75
VA40.25(220)-0.75-0.75VKP-0.75
VA40.25(220)-0.75-1.0VKP-0.75
VA40.25(220)-0.75R-1.0VKP-0.75
VA40.25(220)-1.0-0.75VKP-0.75
VA40.25(220)-1.0-0.75VKP-1.0
VA40.25(220)-1.0-1.0VKP-1.0
VA40.25(220)-1.0R-1.0VKP-1.0R
VA40.25(220)-1.25-0.75VKP-1.0
VA40.25(220)-1.25-0.75VKP-1.25
VA40.25(220)-1.25-1.0VKP-1.25
VA40.25(220)-1.25-1.0VKP-1.25
VA40.25(220)-1.25-1.25VKP-1.25
VA40.25(220)-1.25R-1.0VKP-1.25
VA40.25(220)-1.25VKF10
VA40.25(220)-1.25VKF11
VA40.25(220)-1.5-1.0VKP-1.25
VA40.25(220)-1.5-1.0VKP-1.5
VA40.25(220)-1.5-1.25VKP-1.25
VA40.25(220)-1.5-1.25VKP-1.5
VA40.25(220)-1.5-1.5VKP-1.5
VA40.25(220)-1.5-1.5VKP-2.0
VA40.25(220)-1.5-2.0VKP-1.5
VA40.25(220)-1.5R-1.0VKP-1.5R
VA40.25(220)-1.5VKF10
VA40.25(220)-1.5VKF11
VA40.25(220)-2.0-1.25VKP-1.25
VA40.25(220)-2.0-1.25VKP-1.5
VA40.25(220)-2.0-1.5VKP-1.5
VA40.25(220)-2.0-1.5VKP-2.0
VA40.25(220)-2.0-2.0HVKP-2.0
VA40.25(220)-2.0-2.0SVKP-2.0
VA40.25(220)-2.0-2.0VKP-2.0
VA40.25(220)-2.0VKF10
VA40.25(220)-2.0VKF11
VA40.25(220)-2.5VKF10
VA40.25(220)-2.5VKF11
VA40.25(220)-2.5WBV
VA40.25(220)-2.5WBV-HT
VA40.25(220)-2WBV
VA40.25(220)-2WBV-HT
VA40.25(220)-3.0VKF10
VA40.25(220)-3.0VKF11
VA40.25(220)-3WBV
VA40.25(220)-3WBV-HT
VA40.25(220)-4.0VKF10
VA40.25(220)-4.0VKF11
VA40.25(220)-4WBV
VA40.25(220)-4WBV-HT
VA40.25(220)-5.0VKF10
VA40.25(220)-5.0VKF11
VA40.25(220)-6.0VKF10
VA40.25(220)-6.0VKF11
VA40.25(220)-6WBV
VA40.25(220)-6WBV-HT
VA40.25(220)-8.0VKF10
VA40.25(220)-8.0VKF11
VA40.25(220)C-2.5WBV
VA40.25(220)C-2.5WBV-HT
VA40.25(220)C-2WBV
VA40.25(220)C-2WBV-HT
VA40.25(220)C-3WBV
VA40.25(220)C-3WBV-HT
VA40.25(220)C-4WBV
VA40.25(220)C-4WBV-HT
VA40.25(220)C-6WBV
VA40.25(220)C-6WBV-HT
VA40.25(220)C-NF-050H
VA40.25(220)C-NF-075
VA40.25(220)C-NF-100
VA40.25(220)C-NF-125
VA40.25(220)C-NF-150
VA40.25(220)C-NF-200
VA40.25(220)C-NF-250
VA40.25(220)C-NF-300
VA40.25(220)C-NF-400
VA40.25(220)C-NM-100
VA40.25(220)C-NM-125
VA40.25(220)C-NM-150
VA40.25(220)C-NM-200
VA40.25(220)C-NM-250
VA40.25(220)C-NM-300
VA40.25(220)C-NM-400
VA40.25(220)C-NR-100
VA40.25(220)C-NR-150
VA40.25(220)C-NR-200
VA40.25(220)C-NR-250
VA40.25(220)C-NR-300
VA40.25(220)C-NR-400
VA40.25(220)C-RF-050
VA40.25(220)C-RF-075
VA40.25(220)C-RF-100
VA40.25(220)C-RF-125
VA40.25(220)C-RF-150
VA40.25(220)C-RF-200
VA40.25(220)C-RF-250
VA40.25(220)C-RF-300
VA40.25(220)C-RM-100
VA40.25(220)C-RM-125
VA40.25(220)C-RM-150
VA40.25(220)C-RM-200
VA40.25(220)C-RM-250
VA40.25(220)C-RM-300
VA40.25(220)C-RR-150
VA40.25(220)C-RR-200
VA40.25(220)C-RR-250
VA40.25(220)C-RR-300
VA40.25(220)-NF-050H
VA40.25(220)-NF-075
VA40.25(220)-NF-100
VA40.25(220)-NF-125
VA40.25(220)-NF-150
VA40.25(220)-NF-200
VA40.25(220)-NF-250
VA40.25(220)-NF-300
VA40.25(220)-NF-400
VA40.25(220)-NFB-075
VA40.25(220)-NFB-100
VA40.25(220)-NFB-125
VA40.25(220)-NFB-150
VA40.25(220)-NFB-200
VA40.25(220)-NFB-250
VA40.25(220)-NFB-300
VA40.25(220)-NFB-400
VA40.25(220)-NM-100
VA40.25(220)-NM-125
VA40.25(220)-NM-150
VA40.25(220)-NM-200
VA40.25(220)-NM-250
VA40.25(220)-NM-300
VA40.25(220)-NM-400
VA40.25(220)-NMB-100
VA40.25(220)-NMB-125
VA40.25(220)-NMB-150
VA40.25(220)-NMB-200
VA40.25(220)-NMB-250
VA40.25(220)-NMB-300
VA40.25(220)-NMB-400
VA40.25(220)-NR-100
VA40.25(220)-NR-150
VA40.25(220)-NR-200
VA40.25(220)-NR-250
VA40.25(220)-NR-300
VA40.25(220)-NR-400
VA40.25(220)-NRB-150
VA40.25(220)-NRB-200
VA40.25(220)-NRB-250
VA40.25(220)-NRB-300
VA40.25(220)-NRB-400
VA40.25(220)-RF-050
VA40.25(220)-RF-075
VA40.25(220)-RF-100
VA40.25(220)-RF-125
VA40.25(220)-RF-150
VA40.25(220)-RF-200
VA40.25(220)-RF-250
VA40.25(220)-RF-300
VA40.25(220)-RFB-075
VA40.25(220)-RFB-100
VA40.25(220)-RFB-125
VA40.25(220)-RFB-150
VA40.25(220)-RFB-200
VA40.25(220)-RFB-250
VA40.25(220)-RFB-300
VA40.25(220)-RM-100
VA40.25(220)-RM-125
VA40.25(220)-RM-150
VA40.25(220)-RM-200
VA40.25(220)-RM-250
VA40.25(220)-RM-300
VA40.25(220)-RMB-100
VA40.25(220)-RMB-125
VA40.25(220)-RMB-150
VA40.25(220)-RMB-200
VA40.25(220)-RMB-250
VA40.25(220)-RMB-300
VA40.25(220)-RR-150
VA40.25(220)-RR-200
VA40.25(220)-RR-250
VA40.25(220)-RR-300
VA40.25(220)-RRB-150
VA40.25(220)-RRB-200
VA40.25(220)-RRB-250
VA40.25(220)-RRB-300
VA40.25V(220)-1.25VKF10
VA40.25V(220)-1.25VKF11
VA40.25V(220)-1.5VKF10
VA40.25V(220)-1.5VKF11
VA40.25V(220)-2.0VKF10
VA40.25V(220)-2.0VKF11
VA40.25V(220)-2.5VKF10
VA40.25V(220)-2.5VKF11
VA40.25V(220)-3.0VKF10
VA40.25V(220)-3.0VKF11
VA40.25V(220)-4.0VKF10
VA40.25V(220)-4.0VKF11
VA40.25V(220)-5.0VKF10
VA40.25V(220)-5.0VKF11
VA40.25V(220)-6.0VKF10
VA40.25V(220)-6.0VKF11
VA40.25V(220)-8.0VKF10
VA40.25V(220)-8.0VKF11
VA40.25V(220)-NF-050H
VA40.25V(220)-NF-075
VA40.25V(220)-NF-100
VA40.25V(220)-NF-125
VA40.25V(220)-NF-150
VA40.25V(220)-NF-200
VA40.25V(220)-NF-250
VA40.25V(220)-NF-300
VA40.25V(220)-NF-400
VA40.25V(220)-NM-100
VA40.25V(220)-NM-125
VA40.25V(220)-NM-150
VA40.25V(220)-NM-200
VA40.25V(220)-NM-250
VA40.25V(220)-NM-300
VA40.25V(220)-NM-400
VA40.25V(220)-NR-100
VA40.25V(220)-NR-150
VA40.25V(220)-NR-200
VA40.25V(220)-NR-250
VA40.25V(220)-NR-300
VA40.25V(220)-NR-400
VA40.25V(220)-RF-050
VA40.25V(220)-RF-075
VA40.25V(220)-RF-100
VA40.25V(220)-RF-125
VA40.25V(220)-RF-150
VA40.25V(220)-RF-200
VA40.25V(220)-RF-250
VA40.25V(220)-RF-300
VA40.25V(220)-RM-100
VA40.25V(220)-RM-125
VA40.25V(220)-RM-150
VA40.25V(220)-RM-200
VA40.25V(220)-RM-250
VA40.25V(220)-RM-300
VA40.25V(220)-RR-150
VA40.25V(220)-RR-200
VA40.25V(220)-RR-250
VA40.25V(220)-RR-300
VA40.25V-0.5-0.5VKP-0.5
VA40.25V-0.5-1.0VKP-0.5
VA40.25V-0.75-0.5VKP-0.5
VA40.25V-0.75-0.5VKP-0.75
VA40.25V-0.75-0.75VKP-0.75
VA40.25V-0.75-1.0VKP-0.75
VA40.25V-1.0-0.75VKP-0.75
VA40.25V-1.0-0.75VKP-1.0
VA40.25V-1.0-1.0VKP-1.0
VA40.25V-1.25-0.75VKP-1.0
VA40.25V-1.25-0.75VKP-1.25
VA40.25V-1.25-1.0VKP-1.0
VA40.25V-1.25-1.0VKP-1.25
VA40.25V-1.25-1.25VKP-1.25
VA40.25V-1.25VKF10
VA40.25V-1.25VKF11
VA40.25V-1.5-1.0VKP-1.0
VA40.25V-1.5-1.0VKP-1.25
VA40.25V-1.5-1.25VKP-1.25
VA40.25V-1.5-1.25VKP-1.5
VA40.25V-1.5-1.5VKP-1.5
VA40.25V-1.5-1.5VKP-2.0
VA40.25V-1.5VKF10
VA40.25V-1.5VKF11
VA40.25V-2.0-1.25VKP-1.25
VA40.25V-2.0-1.25VKP-1.5
VA40.25V-2.0-1.5VKP-1.5
VA40.25V-2.0-1.5VKP-2.0
VA40.25V-2.0-2.0HVKP-2.0
VA40.25V-2.0-2.0SVKP-2.0
VA40.25V-2.0-2.0VKP-2.0
VA40.25V-2.0VKF10
VA40.25V-2.0VKF11
VA40.25V-2.5VKF10
VA40.25V-2.5VKF11
VA40.25V-3.0VKF10
VA40.25V-3.0VKF11
VA40.25V-4.0VKF10
VA40.25V-4.0VKF11
VA40.25V-5.0VKF10
VA40.25V-5.0VKF11
VA40.25V-6.0VKF10
VA40.25V-6.0VKF11
VA40.25V-8.0VKF10
VA40.25V-8.0VKF11
VA40.25-VKO30.060CN
VA40.25-VKO30.074CN
VA40.25-VKO30.084CN
VA40.25-VKO30.096CN
VA40.25-VKO31.060CU
VA40.25-VKO31.074CU
VA40.25-VKO31.084CU
VA40.25-VKO31.096CU
VA40.25-VKO50.100DN
VA40.25-VKO50.120DN
VA40.25-VKO50.145DN
VA40.25-VKO50.150CN
VA40.25-VKO51.100DU
VA40.25-VKO51.120DU
VA40.25-VKO51.145DU
VA40.25-VKO51.150CU
VA40.25V-NF-050H
VA40.25V-NF-075
VA40.25V-NF-100
VA40.25V-NF-125
VA40.25V-NF-150
VA40.25V-NF-200
VA40.25V-NF-250
VA40.25V-NF-300
VA40.25V-NF-400
VA40.25V-NFB-075
VA40.25V-NFB-100
VA40.25V-NFB-125
VA40.25V-NFB-150
VA40.25V-NFB-200
VA40.25V-NFB-250
VA40.25V-NFB-300
VA40.25V-NFB-400
VA40.25V-NM-100
VA40.25V-NM-125
VA40.25V-NM-150
VA40.25V-NM-200
VA40.25V-NM-250
VA40.25V-NM-300
VA40.25V-NM-400
VA40.25V-NMB-100
VA40.25V-NMB-125
VA40.25V-NMB-150
VA40.25V-NMB-200
VA40.25V-NMB-250
VA40.25V-NMB-300
VA40.25V-NMB-400
VA40.25V-NR-100
VA40.25V-NR-150
VA40.25V-NR-200
VA40.25V-NR-250
VA40.25V-NR-300
VA40.25V-NR-400
VA40.25V-NRB-150
VA40.25V-NRB-200
VA40.25V-NRB-250
VA40.25V-NRB-300
VA40.25V-NRB-400
VA40.25V-RF-050
VA40.25V-RF-075
VA40.25V-RF-100
VA40.25V-RF-125
VA40.25V-RF-150
VA40.25V-RF-200
VA40.25V-RF-250
VA40.25V-RF-300
VA40.25V-RFB-075
VA40.25V-RFB-100
VA40.25V-RFB-125
VA40.25V-RFB-150
VA40.25V-RFB-200
VA40.25V-RFB-250
VA40.25V-RFB-300
VA40.25V-RM-100
VA40.25V-RM-125
VA40.25V-RM-150
VA40.25V-RM-200
VA40.25V-RM-250
VA40.25V-RM-300
VA40.25V-RMB-100
VA40.25V-RMB-125
VA40.25V-RMB-150
VA40.25V-RMB-200
VA40.25V-RMB-250
VA40.25V-RMB-300
VA40.25V-RR-150
VA40.25V-RR-200
VA40.25V-RR-250
VA40.25V-RR-300
VA40.25V-RRB-150
VA40.25V-RRB-200
VA40.25V-RRB-250
VA40.25V-RRB-300
VA40.25V-X-0.5VKP-X
VA40.25V-X-0.75VKP-X
VA40.25V-X-1.0VKP-X
VA40.25V-X-1.25VKP-X
VA40.25V-X-1.5VKP-X
VA40.25V-X-2.0HVKP-X
VA40.25V-X-2.0SVKP-X
VA40.25V-X-2.0VKP-X
VA40.25-X-0.5VKP-X
VA40.25-X-0.75VKP-X
VA40.25-X-1.0VKP-X
VA40.25-X-1.25VKP-X
VA40.25-X-1.5VKP-X
VA40.25-X-2.0HVKP-X
VA40.25-X-2.0SVKP-X
VA40.25-X-2.0VKP-X

We ship these products worldwide! Delivery is normally stock.
Request a Quote now or call us at 1-800-755-2883 for expert assistance.

Frequently Asked Questions

What does the “.25” in VA40.25 signify?

The “VA40” designates that the assembly uses a Siemens SQM40 actuator. The “.25” specifies its high-torque running profile: it operates with a 25-second runtime (for 90 degrees) to deliver an impressive 90 in-lbs of turning torque. It also contains a specific internal electronic circuit board engineered to match designated Burner Management Systems.

What is the difference between the standard VA40.25 and the VA40.25V?

The “V” suffix in VA40.25V typically indicates a specialized internal control variant inside the actuator, most commonly the inclusion of a factory-installed feedback potentiometer. This is required for burner systems that need a real-time analog signal confirming the exact open/closed position of the valve.

What do the “-90”, “-180”, and “REV” suffixes mean?

These designations refer to the physical mounting angle of the actuator relative to the valve body. A “-90” or “180” means the actuator is mounted at an offset angle, and “REV” indicates a reverse mount. These options are crucial for installing assemblies in tight burner cabinets or complex manifold layouts.

What is the difference between VKF, VKP, and WBV valves?

These represent different Siemens Combustion valve body configurations. VKF valves are flanged butterfly valves, VKP valves are proportional flow control valves for highly precise linear adjustments, and WBV valves are ultra-compact Wafer Butterfly Valves designed to be sandwiched between standard pipe flanges to save space on large-diameter lines.

What do the “X” and “R” placeholders mean in part numbers like VA40.25-X-0.5VKP-X or VA40.25-1.5R-1.0VKP-1.5R?

The “X” typically acts as a placeholder for field-configurable or custom port sizing options that dictate upstream/downstream connection sizes. The “R” designation usually indicates a “Reduced port” specification within the proportional valve body to limit maximum flow while maintaining resolution.

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