When installing a valve positioner it is always recommended that gauges be installed on the positioner. During normal positioner operation gauges have the benefit of showing air movement between the ports on the positioner and the actuator. The main benefit of having gauges on a positioner is during calibration. When a positioner with gauges is calibrated the gauges can be used to determine movement and end of travel of the actuator. The gauges will indicate when the positioner is loading air into the actuator instead of relying on the change in the sound of the air output or visually noticing the actuator moving. Another time it is beneficial to have gauges on the positioner is during trouble shooting. The instrument gauge will determine if the I/P is outputting properly on a electro-pneumatic positioner or if it is receiving a proper signal on a pneumatic positioner. The output gauges can also help determine if an actuator is leaking. A positioner with gauges has the benefit of helping to both calibrate and troubleshoot positioners as well as to give a visual indication that the positioner is moving air during normal operation.
Everyone at VAC hopes that you had a great summer. As we head back to school or back from vacation we want to introduce you to some new mounting kits, and discuss a technical tip.
Available Spots in our Training Class on August 1st & 2nd, 2017
A special thanks to the attendees of our training class in May. The guys pictured below are from left to right, front row: Rob Mueller with Wolseley, Matthew Page with Advanced Valve and Instrument, Bo Sellers with Advanced Valve and Instrument, Jeff Greene with Quality Valves, Jason Browning with ACT and Matt Hannon with ACT. We do have openings for our October 11th and 12th class. If you are interested in going or sending someone from your company please call us at (205)678-0507 or email Tammie Hughes, these spots will not last long!!!
VAC now offers mounting kits for select Badger/RCV and Valtek actuators. These mounting kits are being offered in all Stainless Steel construction. The Badger/RCV 754 series mounting kit (P/N 350287) has been designed to work with only the D400/D500 digital positioner. The diminutive size of the 754 actuator does not allow it to be used with the V100/200 positioners due to the feedback spring in the positioner overpowering the actuator. The mounting kit for the Badger/RCV PA35 actuator (P/N – 350288) was designed to be used with either the D400/D500 or V100/200. The Valtek kit (P/N -350289) has been designed to work with both the D400/D500 and V100/200 positioners. The Valtek kit has been confirmed to fit on actuator sizes up to 50 sq/in and we are currently working to confirm fitment on larger sizes. For questions about the kit please email Scott Kratz here.
One of the most common technical support calls VAC gets on our V100 and V200 is when no input signal or very little input signal is given to the positioner and then the valve package will open. There are 2 possibilities that we need to explore to get our positioner to operate correctly.
One is tubing, when we turn on the air with no input signal air will be exhausted out of the C- port. So if we are at close and our tubing is backwards, the air going out of C- will cause the valve to open and the control signal if ever turned on will have absolutely no affect on the positioner. To fix this problem we must first put the valve where it is desired to be at 0% input signal. Then turn off the air, and finally swap the C- and C+ tubes around. When we apply air back to the positioner the valve package should not move.
The second occurrence is when the cam is not on tight. We must make sure when we loosen the cam nut to mount the positioner, we must then remember to set the cam properly per the IOM of the V100 or V200, and then tighten the cam nut first then the tighten the locking screw. If the cam nut is loose the positioner will go to full open this may happen either when a slight input signal is given or at 0% of input signal, then the valve package will go to 100% it will not stop in between. To fix this we must put the valve back at desired position at 0% input, then turn off the air, set the cam, and finally tighten the cam nut and locking screw.
Our VAC website has a section called Technical Quick Help. Please take a look and as always, if there is any issue to call anyone at VAC, (205)678-0507. The worst problem that we have are the problems we do not hear about.
Thank you for your continued support of our product line. If you have any questions or would like to get more information such as product brochures please call us at (205) 678-0507.
You may also visit our website for more information, (click Valve Accessories & Controls to be redirected) Valve Accessories & Controls.
Valve Accessories & Controls
Our Eastern Regional Salesmen, Bob Goodwin, was contacted by Valve World magazine and was asked to write an article featuring Valve Positioners. Below is a link to the article that was published which talks about the different types of valve positioners that are available in the industry today. The article also discusses analog vs digital positioners and why you might choose one over the other.
Meet Randy Estes:
Randy began his career as a marketing sales associate at PMV after he graduated from Texas A & M with a degree in Industrial Distribution. Randy worked at PMV for several years before deciding to move on to Valve Accessories and Controls as the Western Regional Sales Manager in 2004. Since that time, he has worked tirelessly to grow his territory by seeking out new distributors as well as OEM’s that want to use/sell a better positioner that is supported by far superior customer service than anyone else in the industry. Over the years, Randy has learned that building a network and getting to know your customers on a personal level is as important as knowing your customers needs on a business level. While Randy has accomplished many things since he began with VAC 12 years ago, he feels like his greatest accomplishment is playing a crucial role in helping to grow VAC into the company that it is today.
While he knows that there is a large potential for international sales, he believes that there are many more untapped opportunities for sales right here in the USA.
When he’s not working, Randy enjoys coaching his daughter in the sports that she participates in. He also enjoys sailing and is a Lacrosse official for the high school and college level in Texas.
Valve Accessories and Controls