How to Install a Check-All® Flange Insert Check Valve

The Check-All® Flange Insert (F1, F6, FP) valves are the ultimate check valve in flanged systems. They provide the simplest and most economical way to install check valves in a piping system. The valve body helps position itself while bolts are being installed and tightened.

Check-All® Flange Insert valves are designed to fit between two mating ANSI flanges. Generally speaking, the FIV Class 150 and 300 valves (F1) are designed for standard schedule pipe with Class 150 or 300 flanges, and the FIV Class 600 (F6) valves are designed for schedule 80 pipe with Class 150, 300 or 600 flanges.

Check-All® Insert series valves such as the F1, F6, LP, UV, etc. are designed to use the existing pipe as part of the valve body. This provides a very cost effective solution for valve requirements. As such, part of the valve functions inside the existing pipe; therefore, dimensional clearance must be maintained for proper valve operation.

The Flange Insert valve can also be used as a low pressure relief valve or vacuum breaker by using the desired spring settings.

For more information about Check-All® Valves in Northern California and Nevada, contact CTi Controltech. Call them at 925-208-4250 or visit their website at

USNS Mercy Uses Yokogawa for Steam Boiler Control

On the United States Navy Hospital Ship Mercy, Yokogawa's YS1500 Indicating Controllers are used to control two Foster Wheeler boilers supplying steam to 2 GE turbines to generate 18.3 MW of power.

CTi Controltech

Upcoming Yokogawa Process Control Webinar Schedule

Yokogawa's "Back to Basics" webinar series provides you a great resource to learn and review different measurement technologies. These online webinars discuss recommended practices, application selection and sizing, and how to avoid common pitfalls. Gain insight directly from the Yokogawa experts!


Fundamentals of Fabulous Flow Measurement

Online Webinar
Thursday, April 16, 2020
11:00 AM Eastern / 8:00 AM Pacific

This webinar will explore the fundamentals of flow measurement technologies and how they stack up in different applications.

In this webinar we:
  • Review the theory behind flow measurement technologies
  • Discuss common flow application challenges
  • Evaluate the different technologies when selecting a flow meter
  • Illustrate installation practices for successful measurements

Magical Mystery Tour of High Purity pH Measurement

Online Webinar
Thursday, April 23rd, 2020
8:00 AM Pacific / 11:00 AM Eastern

The presentation will explore the theory of pH and how it can be successfully applied in high purity applications, discuss both standard and solution temperature compensation, review installation requirements, and illustrate good calibration and maintenance procedures to facilitate satisfactory measurements.

In this webinar we:
  • Review the theory behind the measurement of pH
  • Discuss the issues surrounding high purity pH measurements
  • Illustrate the difference between standard and solution temperature compensation
  • Assess installation requirements for successful measurements
  • Clarify good calibration and maintenance procedures

Vibrating Element Technology for Gas Density, Specific Gravity, and Hydrogen

Online Webinar
Thursday, April 30, 2020
8:00 AM Pacific / 11:00 AM Eastern

This presentation goes over the theory behind vibrating element technology and explores some of the applications in which it can be used.

In this webinar we will review:
  • The theory behind density and vibrating element technology
  • The importance of using compensated density
  • How to clean the detector

Digitally Transform your Plant with Field Wireless and IIOT

Online Webinar
Thursday, May 7, 2020
11:00 AM Eastern / 8:00 AM Pacific

Wireless sensor networks can provide reliable and secure communications for applications including control, monitoring, safety, and reliability. Regardless of the application, wireless technology has opened the door for companies to pursue improvements that may have been impossible or uneconomical in the past. However, adopting a wireless strategy is more than just throwing a few radios out into the plant. A little planning can go a long way to ensure your future success.

Topics covered include:
  • Where you would use Field Wireless vs IIoT
  • The fundamentals of wireless sensor networks
  • Applications that illustrate how a wireless strategy can transform your operations, improve reliability, and increase safety

Selecting Burst Rating for Rupture Discs

rupture disc with identification tag
Rupture disc application requires knowledge of process
operation and compliance requirements.
Image courtesy Continental Disc Corporation
Three rating types are available to specify the burst pressure requirements of a Continental Disc Corporation rupture disc:


The embedded document below defines and describes each rating type.

For more information on Continental Disc rupture discs, contact CTi Controltech. Call them at 925-208-4250 or visit their web site at

Happy Holidays from CTi Controltech

A time of peace, a season of wonder and joy... We wish you all the best during the holidays and through the coming year.

The Advanced Technology Behind Air Monitor Flow Measurement Products

Air Monitor Flow Measurement Products

Air Monitor products are used for measuring clean airflow, dirty airflow, and combustion airflow in refineries, foundries, aerospace, power, electronics manufacturing, food & beverage, pharmaceutical, automotive, chemical, wastewater, pulp & paper, and environmental industries. Air Monitor uses multi point averaging pitot tube technology coupled with ultra low, high accuracy, differential pressure measurement to measure air flow in any industrial environment.

Pitot Averaging Technology

The Air Monitor multi-point self-averaging pitot averaging technology is unique in that it is a pure instrument measuring true velocity pressure (total pressure – true static pressure). Other technologies measure a reference pressure on the back or side of the probe resulting in a DP that is not true velocity pressure as derived from Bernoulli’s Equation. This reference pressure requires the use of correction factors that vary with Reynolds number (i.e. velocity and density changes) in order to relate the measured DP to true velocity pressure. The Air Monitor system also utilizes the Fechheimer method of true static pressure measurement along with a chamfered impact or total pressure measurement to provide an accurate velocity pressure measurement and do so with pitch and yaw angles up to ± 30 degrees without requiring additional corrections.

Differential Pressure Technology

Differential Pressure technology is commonly used to measure fluid velocity due to their well-defined relationship. The square root of the differential pressure is proportional to the velocity of the fluid. In ducted systems the total pressure consists of the velocity pressure and static pressure. By measuring the total and static pressures in a duct, the velocity pressure can be obtained by subtracting static pressure from total pressure. This is achieved in practice by directly measuring the differential pressure between the two.

Air flow measurement over a large velocity range requires an extensive selection of DP transducers with multiple upper range limits (URLs) to fit the required application - from ultra low range like 0.05” w.c. URL transducer and higher. Air monitor offers this ultra low range DP sensing capability coupled with the Auto-zero function to provide a highly accurate DP measurement with long term calibration stability starting for 0.05” w.c. URL transmitters.

For more information in Northern California and Northwestern Nevada, contact CTi Controltech by calling 925-208-4250 of visit their web site at