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800-543-9038 technicalsupport@us.belimo.com

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Damper Actuator

Control Valve

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MFT (Product)

What is CV and why is it important for a modulating valve? How do I calculate it?
Cv is the capacity of the valve to deliver flow with an available differential pressure (∆P) across the valve. The Engineer of Record typically specifies Read more...
How do I manually override my actuator?
All EF, AF and NF series spring return actuators, and FSAF and FSAFB fire and smoke actuators, have a detachable manual override crank tool that fits Read more...
What is the difference between NTC 10K Type 2 and Type 3 sensors?
At 77ºF, 10K ohms is the signal for both NTC 10K Type 2 and Type 3 sensors, but the values are somewhat different for other temperatures per the Read more...
What is the difference between a spring return, non-spring return, and electronic fail-safe actuator? What are the advantages and applications for each?
Spring Return actuators utilize an internal spring that drives the actuator open or closed on loss of power. Electronic Fail-safe actuators utilize super Read more...
How do I size a damper actuator?
The "10 questions" method for sizing and selection found in the attachment is recommended.  It takes into consideration the total Read more...
I want to reprogram my MFT actuator. What equipment & instructions do I need?
There are two ways off programming an MFT actuator.  You can use the ZTH US handheld device and using one of the provided cables you can connect to Read more...
Can your 3-way valves be used for mixing and diverting?
CCV, threaded globe, and HD/HDU/L/VIC butterfly valves can be piped for mixing or diverting. Flanged globe valves have 2 separate mixing and diverting Read more...
What is the flow pattern and correct piping for a CCV?
Two and 3-way CCV's  have the characterizing disc on the A port.  The B port is also characterized on 3-way CCV's.  Three-way Read more...
What valves can I use for steam applications?
Maximum inlet pressure along with maximum differential pressure and steam temperature are the most important considerations when selecting a valve Read more...
For temperature sensors, do you have a resistance (ohms) to temperature table?
See the table below for typical ohms per temperature for NTC and RTD signal types.  Read more...
Do all control valves get piped from the return side of coils?
The standard installation practice to safeguard electric actuator longevity is to reduce exposure to external water and excessive ambient heat.  Read more...
What is the replacement for my NF120 US or AF120 US actuator?
The NF/AF series 120 VAC on-off actuators are functionally replaced with the NFBUP and AFBUP in all damper applications and in valve applications using Read more...
Where can I find more information on your Multi-Function Technology (MFT) actuators?
Reference MFT/PC-Tool Technical Documentation and other MFT related resources found in Systems Accessories.     Read more...
What do the lights on the MFT actuator mean?
MFT actuator series non-spring return and electronic fail-safe include LED's, spring return series MFT actuators are not offered with LED's. Non- Read more...
How small can a valve be compared to line size?
The golden rule is never reduce the valve smaller than half the line size.  When a smaller valve than the pipe size is installed, pipe reducers have Read more...
How do I troubleshoot my modulating SY actuator?
See attached guide for basic troubleshooting steps if you are experiencing issues with your SY series MFT actuator.  Contact Belimo Technical Support Read more...
What is the purpose of the adaptation button on your MFT and some –SR actuators?
Depending on the actuator, adaptation is initiated by one of the following a) Pressing the manual override button twice b) clicking the CW/CCW switch Read more...
What does Master-Slave wiring mean and when would I use it?
This wiring method is preferred for piggyback applications where actuators are mechanically coupled to a single shaft or linkage. Master-Slave wiring must Read more...
What is a characterized control valve (CCV)?
Belimo’s unique Characterized Control Valve™ (CCV) have a special characterizing disc inside the A port of the valve which gives it an equal Read more...
How do I retrofit a globe valve with a failed NV or NVF actuator?
First, the valve size and manufacturer will be needed to determine the required linkage.  Belimo globe valves less than or equal to 2 inches Read more...
Are there issues installing stainless steel body valves in a carbon steel piping system?
The Engineer of Record should make decisions regarding valve and pipe material compatibility and the application of dielectric unions.  The Read more...
How do I parallel wire multiple actuators?
As long as the dampers or valves are not mechanically linked the modulating actuators can be wired in parallel as shown in the attached diagrams.  Read more...
What is the difference between a RTD and a Thermistor?
An RTD (Resistive Temperature Device) is made of metal such as Platinum (PT) or Nickle (Ni).  As temperature increases the resistance measured in Read more...
What is the difference between fast running and quick running actuators? How can I tell the difference?
The non-spring return actuator product nomenclature includes the letter Q for quick running and C for fast running following the actuator torque letters. Read more...
Does Belimo offer a three way Pressure Independent Valve?
With the exception of our 6-way ePIV, Belimo pressure independent valves are available in two way configurations only. A three way valve for coil control Read more...
Why does the damper close with loss of power?
Belimo spring return, and electronic fail-safe actuators, are designed to fail open or closed when power is interrupted. Power loss unwinds the Read more...
What information is needed to select a control valve?
Basic required application information Full flow GPM (or steam lbs/hr capacity) With pressure independent (PI) valves, only the full flow GPM is Read more...
Can I change my spring return damper actuator from fail closed to fail open?
All Belimo spring return actuators can be mounted to fail open or to fail closed upon loss of power based on how the actuator is mounted on the damper Read more...
Are Belimo valves and actuators serviceable? How do I obtain replacement parts?
There are no serviceable parts or repacking kits for CCV's or butterfly valves so if they fail they will need to be replaced.  Similarly, Read more...
Is a balancing valve required when using an energy valve or PIV?
Belimo pressure independent valve (PIV) offerings include electronic pressure independent series (Energy Valve and ePIV) and mechanical pressure Read more...
Does Belimo offer NEMA 7/9 Div 1&2 actuators and valve assemblies?
Belimo offers an explosion-proof housing for damper applications only.  For additional information see attached datasheet. The ZS-260 explosion-proof Read more...
How do I replace a failed actuator on a CCV?
Today’s CCV’s have actuators with an integrated rotary linkage.  The “R” in the actuator part number (such as AFR or LR) Read more...
Do you have spring return actuators?
Yes, we have spring return actuators for control dampers and valves.  Belimo spring return actuators are designed for use in a wide variety of HVAC Read more...
Where can I find up to date PC Tool software?
The latest update to PC-TOOL, our MFT programming software, can be found on our Sizing and Selection Tools webpage. To download our free PC-Tool software Read more...
How to retrofit Armstrong steam humidifier globe valves?
Belimo recommends replacing old pneumatic and electronic operators on Armstrong 2" and smaller steam humidifier globe valves with the following Read more...
How do I adjust the open and close for FSLF actuator?
The FSLF actuator does not have an external stroke limiting capability. The limit of the stroke if <95 degrees would be dependent on the range of the Read more...
What is Pressure Independent (PI) valve technology?
PI valves are dynamically balanced delivering the proper flow to the coil over any operating load condition. Overflow and underflow are eliminated Read more...
How do I determine torque for a pneumatic actuator?
Pneumatic actuators usually produce a linear force; in order to determine the equivalent torque, the linkage minimum effective radius and the Read more...
Can a –SR or MFT modulating actuator be field wired for On/Off or 2-position control?
All of the -SR and -MFT models (when programmed to 2-10 or 0-10 VDC) (with the exception of the SY, PR, and PKR Series) can be wired for On/Off or 2- Read more...
What is the flow pattern and correct piping for your flanged globe valves?
Globe valves are flow direction specific and have visual arrows on the valve body indicating an inlet or outlet port. Two-way valves have a Read more...
Can I mount my actuator upside down?
Actuator can be mounted in any orientation when mounted onto a damper. When an actuator is mounted on a valve the actuator should not be mounted below Read more...
Can I mechanically connect or tandem mount more than one actuator on a damper or valve?
YES. This is sometimes referred to as ‘piggy-back’. The preferred method for mechanically linked actuators would be through the use of MFT Read more...
Why is Belimo's CO2 sensor dual-channel technology better than CO2 sensors using ABC logic to compensate for sensor drift?
Dual-channel (also called dual-beam) technology is self-calibrating by using two infrared beams (NDIR). One reference beam is only activated during Read more...
Can I add a switch to my butterfly valve actuator?
SY actuators come standard with two integral switches and AFR series spring return actuators can be purchased with the –S option which has two built- Read more...
Are actuators available with 4-20mA feedback?
Only the modulating SY series actuators are available with 4-20mA feedback.  All other Belimo modulating rotary and linear actuators offer voltage Read more...
Do you make replacement actuators for obsolete Belimo actuators or other brands?
The Source for HVAC Actuator and Valve Replacement Solutions Belimo Retrofit App allows you to quickly and easily find HVAC replacement solutions for Read more...
Can the MFT actuators accomplish floating point control? Or do I need an actuator that specifically does floating point like the LMB24-3-P10-T?
Most MFT models can be programmed for Floating control.  This is common when a feedback signal or future field program changes are desired.  Read more...
I am having problems with my SY actuator. What should I do?
Non -MFT Models: SY products without the MFT on the nomenclature are only used for on/off or floating point applications.  They are only going to use Read more...
Can I remove or replace my actuator cable?
Cables are installed at the factory and cannot be changed or reattached in the field.  The standard cable length is 3 feet but most actuator can be Read more...
What are the advantages of pressure independent (PI) valves?
Pressure Independent (PI) Valves are designed to deliver the proper flow to the coil over any operating load regardless of system pressure fluctuations Read more...
How do I limit damper rotation to less than 90 degrees?
Rotation can be limited in two ways, mechanically or electronically. To limit the stroke mechanically, an angle of rotation limiter will need to be Read more...
What actuator can I use for 135 ohm control?
Belimo offers several actuators with 135 ohm control suitable for Honeywell Series 90 controllers.  The products must have MFT95 in their Read more...
Can the TR24-3 US be wired in parallel?
The TR24-3(-T) US cannot be wired in parallel due to the internal actuator circuitry.  The TR24-3(-T) US utilizes two AC Synchronous motors to drive Read more...
How can I mount a damper actuator on a CCV or small butterfly valve?
Only spring return damper actuators can be field mounted on CCV's, or butterfly valves 3 inch and under, with rotary linkage kits purchased Read more...
Do you have a link to download the Belimo zip-usb-mp software for MFT actuators?
Click here to download the ZIP-USB-MP driver. Click here  to download a copy of the ZIP-USB-MP instructions. Read more...
How do I adjust flow on a PICCV valve with KRB24-3?
The KRB24-3 actuator is available on certain bodies of Pressure Independent Characterized Control Valve (PICCV) assemblies (P2050B010, P2050B025, P2050B055 Read more...
How do I rebuild a Belimo globe valve?
If your Belimo flanged globe valve is leaking or isn't performing optimally it might be time to rebuild it. Belimo offers rebuild kits for many Read more...
What does Position Control mean for ePIV and Energy Valve, is Valve Position a feedback option?
“Position Control” is a configurable control mode for ePIV or Energy Valves. The other option is “Flow Control”  (i.e. Read more...
Is ZoneTight QCV & PIQCV available?
Belimo's new pressure dependent QCV and pressure independent PIQCV zone valve offering is now available. The ultra-compact QCV leads the way in Read more...
Do you have flow curves for your CCV valves?
Belimo characterized control valves (CCV) have an equal percentage flow characteristic as shown below.  To obtain a CCV flow curve for a specific Read more...
Can the Energy Valve be used with VFDs
The Energy Valve, or ePIV, complements the performance of variable flow hydronic systems utilizing variable frequency drive (VFD) pumps.  The Energy Read more...
My Belimo product is not sold in the United States. How can I replace it?
For help finding a functional replacement for Belimo products sourced outside the United States contact Technical Support at 800-543-9038. Read more...
Where can I get information on Belimo hand held programming devices?
To view information on Belimo hand-held programming devices click here and scroll to the bottom of the webpage. Read more...
Does Belimo offer a NEMA 4 parts kit?
Belimo actuators do not come with the option of purchasing a field installed parts kit to convert the standard NEMA 1 or 2 enclosure to a NEMA 4 or 4X Read more...
Can I buy a valve body by itself?
In general, Belimo can furnish replacement valve bodies for an in-warranty failure or they can be purchased to replace an out-of-warranty failure.  Read more...
Do you have a training video or webinar for ZoneTight?
Designed for maximum efficiency in tight spaces, Belimo’s ZoneTight valve offering sets new design and performance standards for both pressure Read more...
What actuator is recommended for generators which must start in 10 seconds?
Since a generator damper is spring open, the AF actuator with a 20 second full load spring time can be used. A parallel blade damper with a 50% authority Read more...
How do I replace a failed CCV if my actuator is still working?
There are no serviceable parts or repacking kits for CCV's so if the valve fails it will need to be replaced.  If the failed valve is the older Read more...
Does Belimo carry any BACnet compatible VAV Controllers?
Belimo does not offer VAV controllers in the Americas, but they are available in Europe and Asia.  To view the EU and AP VAV offering click here. Read more...
What does the R and L mean in CMB24-SR-R -L
The CMB24-SR actuator receives a 2-10vdc control signal and is available in -R and -L models; indicating the “Normal” position of the Z2 & Read more...
What replaces obsolete BLF24 & BLF230 European Fire & Smoke Actuators
The BLF series fire and smoke actuator series has been discontinued. The BFN series is the new replacement. Model cross reference below with details and Read more...
Does Belimo supply bolt kits, flange gaskets, or fittings with butterfly valves?
These parts are not provided with butterfly valve shipments nor can they be purchased separately from Belimo.  These parts can be obtained through a Read more...
What happens to the leaving air temperature (LAT) as coil water flow is reduced with the Energy Valve Delta T Manager?
More information is needed to answer this general question, in particular, what sensor is controlling the control valve water flow?  Typically fan Read more...
How do you determine Energy Valve Cv
Standard pressure dependent control valves are selected for an application with a specified Cv that is used to determine the full flow of the valve at a Read more...
Can the S2A-F auxilary switch be used with non-fire and smoke actuators?
The S2A-F add-on switch is for use only on our fire and smoke actuator models FSAF, FSNF, and new style FSLF with top holes.  They are not intended Read more...
Is there a damper or valve actuator that is acceptable for outside installations?
Belimo offers factory furnished NEMA 4/4X damper and valve actuator enclosures for most spring return and non-spring return actuators.  To learn more Read more...
Does Belimo have 480 Vac 3 phase actuators?
Belimo does not offer actuators that accept supply voltages greater then 240 VAC single phase. Read more...
What are the configuration options and codes for SHP series 3-way butterfly valves?
The SHP series butterfly valves are flow direction specific. The Master Valve is always located on the run. The Slave Valve operates inversely of the Read more...
What are the configuration options and codes for HDU/HD/L and Victaulic series 3-way butterfly valves?
The HDU/HD/L and Victaulic series butterfly valves are capable of bi-directional flow.  The Master Valve is always located on the run.  The Read more...
What type of sensor do you have, active or passive?
Active output signals include: 4 to 20 mA, 0 to 5 VDC, or 0 to 10 VDC. Passive output resistance types include: NTC 10k type 2 and type 3, NTC 20K, 1000 Read more...
Does Belimo have 120V failsafe actuators for the ZoneTight QCV and PIQCV?
ZoneTight electronic fail-safe actuators are only available in 24V versions at this time.  If 120V is required, a step down transformer is required, Read more...
What is the NEMA Rating on Belimo Flow Meters?
Belimo FM series ultrasonic flow meters are rated to UL Type 1, NEMA 2. Enclosures classified as NEMA 2 are intended for indoor use and provide some Read more...
Can I remove or change the disc in my CCV?
The characterizing discs are factory installed and cannot be changed in the field.  If the disc is removed the valve will leak and the warranty will Read more...
How do I set up my Cambridgeport or Carrier economizer?
Click here for installation videos and documentation. For technical support questions that may arise regarding the Belimo Zip Read more...
Do you sell pneumatic actuators?
Belimo does not manufacture or sell pneumatic actuators.  For more information on our electric actuators for dampers and valves please visit www. Read more...
Is a weather shield or NEMA 4 actuator design available for Energy Valves?
Several sizes of weather shields are available but at this time a NEMA 4 actuator is not available. For more info specifics on Energy Valve Read more...
Does the new zonetight valve come with proportional actuators?
ZoneTight valve actuator control signal options are: on/off, floating, and 2-10VDC proportional control. Two-way models with -SR designation use a 2-1 Read more...
Do you have a training video or webinar on dynamic balancing?
Belimo has a YouTube training webinar on dynamic balancing.  Pressure Independent Valves offer system stability, improved efficiency and overall Read more...
Can the B port be capped on the 3-way valve to make them a 2-way valve?
Globe valves should not be converted to 2-way as it could affect the valve close-off pressure. For other single-body 3-way valves such as CCV or L Series Read more...
Can I use your valves for compressed air, flammable gas or potable water?
Belimo valves are designed for use in standard HVAC CHW/HW/Steam applications that adhere to the attached water quality guidelines. They are not certified Read more...
Can a -3 actuator be used for on/off control?
Non-spring return -3 actuators can be wired for on/off control with a SPST contact. Spring return -3 actuators should only be used for floating point Read more...
What is the close off pressure for the zone valve series?
Close off pressure in the basic zone valve product line is dependent on Cv. For example the 1/2" model with Cv = 1 is 75psi close-off, the 1" Read more...
How do I replace obsolete FSAF24-BAL?
The FSAF24-BAL US is replaced by FSAFB24-SR (FSAFB24-SR-S model if auxiliary switches are used) The actuator will be used in conjunction with the Read more...
Can you cross over a non Belimo valve to Belimo?
There are many technical aspects of valve performance to consider when replacing another manufacturer’s valve with a Belimo valve.  Valve type, Read more...
What weather shields can I use with a threaded CCV/PICCV series valves?
Model ZS-CCV... series weather shields are designed as a water tight enclosure to provides moderate protection when mounted outdoors for Characterized Read more...
What Belimo valves have linear flow characteristics?
The B3L series ball valves are modified linear, and the G3 threaded globe valves have linear flow from B to AB.  The G6LCS and G7 flanged globe Read more...
Does Belimo offer a 120V NEMA 4 actuator for use on CCVs?
If a 120V NEMA 4 actuator is required, an AFRXUP N4 (with or without heater) spring return actuator can be installed on all Belimo 2 & 3-way threaded Read more...
Can I adjust the stroke length on a linear damper actuator?
The linear series actuators (LHB/X, AHB/X) are available in 4, 8, or 12-inch stroke. The quick-running versions LHQB/X  and AHQB/X come in 4-inch Read more...
How do I foot mount my AF series damper actuator?
A ZG-118 universal mounting bracket or ZG-AFB118 crank arm adapter kit is needed to foot mount a new generation AFB/AFX, NFB/NFX, or FSAFB24-SR damper Read more...
Why are isolation relays required for 2 position SY actuators wired in parallel?
The reason parallel applications need isolation relays is that the motor uses two sets of windings, one for each direction. When one is energized to turn Read more...