Wednesday, September 30, 2015

Custom Epoxy Vacuum Feed Throughs Take It All Through The Wall

custom epoxy feedthrough
Take it all through the wall!
Equipment manufacturers and scientific researchers are continually challenged with supplying power, fiber-optic, control, and monitoring cables into (and out of) sealed vacuum vessels. Whether due to space restrictions, special geometries, or number and type of conductors, standard glass-to-metal or ceramic feedthroughs never quite fit the bill. Unfortunately, because of limited options, many designers are forced to compromise and go for an off-the-shelf solution.

Epoxy to the rescue. During the past decade, new epoxy compounds have been developed that rival glass and ceramic in performance. BCE is at the forefront of this development and leverages modern epoxy's unique properties to solve your feedthrough challenges.

Here's a presentation done in 2015 about the capabilities of custom epoxy vacuum feedthroughs.

For more information visit

Wednesday, September 23, 2015

New Design Ball Valve Delivers Accurate Control for ANSI Class 150 to 1500

Trunnion Mount Control Valve
ANSI 150 to 1500Control Valve
This video demonstrates a new valve design that provides excellent control characteristics while maintaining the critical features of trunnion mount valves, namely fire-safe and metal-to-metal tight shutoff. In this video you see a 16" OpTB forged, 3-piece, trunnion mounted ball valve cycling open and closed.
Full port and POB Ball
Full port and POB Ball

Using a new technology known as “Process Optimizer Ball”, these valves surpass the flow control performance of V ported ball valves, and exceed the V port's limitation to Class 600.

Designed to provide an exceptional process control, this valve is ideally suited for industrial services where there are challenging abrasives, corrosive fluids, and have to work under high temperatures and pressures.

For more information contact:
BEC (Belilove Company) 
21060 Corsair Blvd
Hayward, CA 94545
Phone: (510) 274-1990
Fax: (510) 274-1999

Thursday, September 10, 2015

Involved with Materials and Vacuum? Know the AVS? Check Out Their 2015 Symposium & Exhibition
In 1953, a group of professionals met in 1953 in New York City to discuss high vacuum applications and problems. In 1957 the group formally named itself the Advanced Vacuum Society ( and has since then grown into multiple technical divisions and technical groups that encompass a range of established as well as emerging science and technology areas.

Today, the AVS is self-described as " .. an interdisciplinary, professional Society, AVS supports networking among academic, industrial, government, and consulting professionals involved in a variety of disciplines - chemistry, physics, biology, mathematics, all engineering disciplines, business, sales, etc. through common interests related to the basic science, technology development, and commercialization of materials, interfaces, and processing area."

Each year they hold their International Symposium & Exhibition that draws over 3000 people. This year the 62nd International Symposium & Exhibition is being held on October 18 through 23 at the San Jose Convention Center. You can learn more about it here.

For anyone involved in material science, or vacuum technologies, its an excellent organization to join. BCE is proud to support the AVS, and will be exhibiting products unique to this group, namely: custom board mountable vacuum feedthroughs for quick turn prototypes, custom heater assemblies, controllers, sensors, ceramic metallization, and precision laser machining and drilling for difficult applications. If you visit the exhibition, please stop by and visit us at booth 914.

Thursday, September 3, 2015

Use Electronic Pressure Controllers in Your Research Process Loop to Eliminates Droop, Boost, and Hysteresis

(re-blogged with permission from Brooks Instrument)

Gas pressure control is critical in many applications like life sciences and chemical/petrochemical research where flow is an integral part of the process. Brooks Instrument electronic pressure controllers can be used as they require flow to function. Compared to using a mechanical pressure regulator, electronic pressure controllers eliminate droop, boost and hysteresis, offering stable pressure control.

There are two configurations available for pressure control – upstream and downstream. This terminology is somewhat unique to Brooks Instrument electronic pressure controllers.

Downstream vs. Upstream Pressure Control

Downstream pressure controllers maintain the pressure downstream of the device itself, increasing flow to increase the pressure and decreasing flow to decrease the pressure. For this reason, this is called direct acting. This configuration is commonly called a standard pressure regulator. A downstream pressure controller acts very similar to a typical mass flow controller because they are both direct acting.

Upstream pressure controllers maintain the pressure upstream of the device itself, increasing flow to reduce the pressure and decreasing flow to increase the pressure. For this reason, this is called reverse acting. This configuration is commonly called a back pressure regulator in the industry.

Selecting and Sizing an Electronic Pressure Controller

The following information is required to select and size a Brooks Instrument electronic pressure controller:

  1. Process gas
  2. Maximum flow rate being used to maintain pressure -The “sweet spot” for pressure control is between 100 SCCM and 5 SLPM.
  3. Calibration pressure (maximum pressure to be controlled)
  4. Reference pressure (for upstream controllers the reference pressure is the downstream pressure and for downstream controllers the reference pressure is the upstream pressure)

As long as flow is present in a process you will typically find the need for some type of pressure control. Vessel sizes up to 30 liters commonly use flow rates up to 3 SLPM during their process steps. Brooks Instrument pressure controllers are a perfect fit for these services, offering stable pressure control with no droop, boost or hysteresis, which are commonly experienced when using a mechanical pressure regulator.

Typical Bioreactor Process Using an Upstream Pressure Controller