Topics
Technical Support
USA/LATIN AMERICA
800-543-9038 technicalsupport@us.belimo.com
CANADA
866-805-7089 technicalsupport@ca.belimo.com
BRAZIL
+55 11 3643 5656 suportetecnico@br.belimo.com
Products
Damper Actuator
- How do I manually override my actuator?
- What is the difference between a spring return, non-spring return, and electronic fail-safe actuator? What are the advantages and applications for each?
- What is difference between modulating damper and open/ close damper actuator
- How do I size a damper actuator?
- What is the replacement for my NF120 US or AF120 US actuator?
Control Valve
- What is CV and why is it important for a modulating valve? How do I calculate it?
- How do I manually override my actuator?
- What is the difference between a spring return, non-spring return, and electronic fail-safe actuator? What are the advantages and applications for each?
- What is difference between modulating damper and open/ close damper actuator
- What is rangeability? Turndown ratio?
Accessories
Retrofit
- Do you have a cross reference for obsolete valve actuators?
- Do you make replacement actuators for obsolete Belimo actuators or other brands?
- How do I retrofit a globe valve with a failed NV or NVF actuator?
- How do I adjust the open and close for FSLF actuator?
- Can you cross over a non Belimo valve to Belimo?
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...
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...
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...
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...
Can your 3-way valves be used for mixing and diverting?
CCV and HD/HDU/VIC butterfly valves can be piped for mixing or diverting. Globe valves have 2 separate mixing and diverting valve bodies and cannot be 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...
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...
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...
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...
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...
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...
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 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...
Do you make replacement actuators for obsolete Belimo actuators or other brands?
To view replacement actuators for obsolete Belimo actuators or other brands open the Retrofit Module within SelectPro. Click the Damper or Valve 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...
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 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...
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...
How can I update my PC-TOOL software?
The latest update to PC-TOOL, our MFT programming software, can be found under the Multi-Function Technology tab on most of our actuator webpages. For PC- 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...
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...
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 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...
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...
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 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...
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...
Can I mount my actuator up-side-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...
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...
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...
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...
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...
How do I mount an actuator on a damper shaft?
Click here to watch the YouTube video on how to properly attach an actuator to a damper assembly and apply pre-tension to the assembly. This will provide Read more...
What Belimo valves have linear flow characteristics?
The B3L series ball valves are modified linear, and the G2S & G3 globe valves are linear. Also, the Belimo Energy Valves and ePIV' 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...
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...
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...
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...
Where can I get information on Belimo hand held programming devices?
To view information on Belimo hand-held programming devices use the Multi-Function Technology tab found on most actuator webpages or click here. 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...
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...
What weather shield or NEMA 4 enclosure can I use on a large flanged CCV?
Belimo offers a NEMA 4 enclosure option on Large (Flanged) Characterized Characterized Control Valve (LGCCV) assemblies per below table: 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...
I cannot mount my actuator on the damper shaft. What are my options?
See the Belimo Mounting Methods Guide section 3 for different ways to non-direct couple damper actuators. Some of the linkage and actuator part Read more...
Do you sell repacking or rebuild kits for your globe valves?
Repacking kits are available for all Belimo globe valves and rebuild kits are available for flanged globe valves. Click here for details 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...
How do I mount or remove my ZoneTight actuator?
ZoneTight zone valve actuators are designed to be removed or mounted to the valve body by hand with a linear upward or downward force. To mount the Read more...
What linkage do I need to mount an NMB24-SR onto a CCV?
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...
What are the recommended fluid velocity limit for butterfly valves? Is there a fluid velocity chart?
HDU/HD/L Series: It is not recommended to exceed 12 feet per second through resilient seat butterfly valves. Velocities greater than 12 fps may 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...
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...
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...
Where can I get product pricing, documentation, technical datasheets, or installation instructions?
Specific product information and pricing can be accessed by clicking the magnifying glass icon on nearly every webpage. This opens the search 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...
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...
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...
Do you make a replacement globe valve actuator for other brands?
To view replacement globe valve actuators for other brands open the Retrofit Module within SelectPro. Click the Valve button and select Valve Read more...
How many Belimo FS actuators can be placed on a single transformer or breaker?
It is unlikely that actuators would be the only load since smoke detectors and other life safety may be on the same breaker. It is wise to leave spare 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...
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...
What are your production lead times?
Standard Lead Times (from order confirmation to issuance of tracking number) for Belimo Americas products are as follows: Product Line Expected 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...
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...
Is a three-way Energy Valve available?
Belimo Energy Valves are available in 2-way configuration only. Traditional three-way control valves are used on constant volume systems with the 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...
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...
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...
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...
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 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...
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...
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...
Do you sell the actuators you make for OEMs such as Carrier, Trane and York?
Belimo actuators manufactured for an Original Equipment Manufacturer (OEM) may include custom features that are unique to the OEM. Replacement OEM 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...
What is the flow pattern and correct piping for a threaded globe valve?
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...
Where can I find more information on your Multi-Function Technology (MFT) actuators?
There is a Multi-Function Technology tab on most of our actuator webpages. Under this tab you will find resources such as technical documentation, 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...
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...
When ordering a AFX24-MFT-N4 will it spring open or spring closed? Do they come a certain direction?
The AFX24-MFT N4 is shipped from the factory with the clamp on the CCW side of the actuator; however, the clamp can be requested to be mounted on the CW Read more...
Does Belimo offer a three way PICCV or EPIV?
The Belimo pressure independent PICCV and EPIV are available in two way configurations only. A three way valve for coil control is traditionally used in a Read more...
What sizes are your Flow Meters?
Belimo currently offers ultrasonic flow meters in size 1/2" - 2" NPT. In the future the line will expand to include larger sizes. For addition Read more...
Do Belimo globe valves have ASME standard certification?
Belimo flanged valves, specifically G6100C, G6125C, G6150C, G665C and G680C, are iron and are in the ASME B16.1 category. Belimo threaded globe Read more...
Do SY actuators have auxiliary switches?
The SY series actuators have 2 built in auxiliary switches (LS3 & LS4). These can be used to prove whether the actuator/valve is open or closed. Read more...
What is the ambient temperature rating of Belimo Flow Meters?
The Belimo Flow Meters are rated to the following ambient temperatures: Storage temperature (in an un-powered state): -40°F (-40°C) / 176°F (80 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...
What is the difference between the ZoneTight valve and conventional CCV valve?
ZoneTight QCV and Characterized Zone Valve (CCV) offerings are both high quality 2-way and 3-way pressure dependent valve assemblies designed for HVAC 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...
What are the most important code issues for Fire & Smoke actuator replacement?
All codes require life safety systems to be in working order and defects to be corrected. Interpretations on the details vary within different Read more...
What does the FC stand for on a fire and smoke actuator with an FC suffix?
Models with FC included in the part number are provided with a 3/8" screw flex connector rather than the standard 1/2" conduit connector and 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...
What sensor is best suited to determine building occupancy: CO2 or VOC?
CO2 is the best sensor to determine occupancy because the reading is directly proportional to the CO2 emitted by humans as they breathe. Low levels of CO2 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 is the smallest actuator available?
The smallest non-spring (fail in place) damper actuator sold by Belimo is the CMB series actuators. These actuators provide 18 in-lbs of torque. 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...
Can your flow meters be used for potable water applications?
Belimo ultrasonic flow meters are not certified to NSF 61 for potable water use. They are designed for HVAC chilled water, hot water, and water/ Read more...
Should steam valves be piped vertical or horizontal?
Steam valves should always be installed on a horizontal steam line, never vertically. A control valve in a vertical installation has no ability to Read more...