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Check out our newest case history:

Check out our newest case history:  How Cla-Val's 210-FF Altitude Control Valve with KO Anti-Cavitation Trim met the challenge of cavitation during the tank filling process.  Click here to read and see for yourself.

Choosing the Right Fueling Nozzle
The ability to efficiently refuel aircraft is one of the most important functions in successfully operating a commercial airport or military air base. That capability, coupled with the proficiency of flight line personnel, is largely dependent on the quality of the fuelling equipment that is being used. The performance and reliability of this equipment not only impacts on-time departures, it also has a significant influence on the safety of passengers, personnel, aircraft and support facilities.

Cla-Val's Modulating Level Control Valve with Flow Metering provides the Virginia town of Front Royal with an all-in-one solution for their water treatment plant expansion
Multi-Tasking Level Control: Cla-Val?s Modulating Level Control Valve with Flow Metering provides the Virginia town of Front Royal with an all-in-one solution for their water treatment plant expansion

Cla-Val Electronic Pressure Management Valves give a Toronto neighborhood a winter free from pipe breaks
No Winter Break(s): Cla-Val Electronic Pressure Management results in a break free winter in an East York-Toronto Pilot Project

Cla-Val Blending Valve Provides a Cost Effective Way to Meet the New Arsenic Rule Requirements for Drinking Water
Just in the Nick of Time: Cla-Val Blending Valve Provides a Cost Effective Way to Meet the New Arsenic Rule Requirements for Drinking Water

High Tech Solutions for a Low Tech Problem
The San Sevaine turnout is just one of many places in the Inland Empire Utility Agency’s waterworks system where a standard automatic control valve is just not the best product choice for its flow control requirements.

Cla-Val New Pipeline Surgeview Analysis Valve News
One of the most complex challenges a design engineer faces in dealing with pipeline surges is to determine the best way to provide proper protection. Whenever there is a change in pipeline velocity, a potential surge problem can develop. Pipeline surge problems can be caused by many events including, but not limited to, the following.

Wireless Level Valve Control for Hydroelectric Generating Stations
"Everyday we had to twice drive up the hill to the fore bay to read the level and return to the hydro site to reposition the Cla-Val. Now it is automated."

Cla-Val Metering Valve Controller with Built-in Totalizer
Water districts are faced with ever increasing demands to account for their water usage. To monitor this information they must add flow meters and totalizing instruments. In some cases the flow or total volume may need to be controlled with an automatic control valve. Doing all of this typically requires several instruments. What is needed is an instrument that is capable of doing it all.

Cla-Val E-Solutions Actuated Pilot Control
For many years Cla-Val 90-21 UL listed pressure reducing valves were listed in ductile iron 150# flanged (rated to 175 psi) and 300# flanged cast steel (rated to 300 psi). The existing valves are still available but NOW the ductile iron valve is listed with 300# flanges (rated to 300 psi). In addition the Model 90-21 is NOW listed with grooved ends (rated to 300 psi) globe pattern sizes 1 1/2” - 6” and angle pattern sized 2” - 4”. The NEW grooved end design allows easier installation therefore cost are reduced.

Look What's New from Cla-Val Fire Products Division
For many years Cla-Val 90-21 UL listed pressure reducing valves were listed in ductile iron 150# flanged (rated to 175 psi) and 300# flanged cast steel (rated to 300 psi). The existing valves are still available but NOW the ductile iron valve is listed with 300# flanges (rated to 300 psi). In addition the Model 90-21 is NOW listed with grooved ends (rated to 300 psi) globe pattern sizes 1 1/2” - 6” and angle pattern sized 2” - 4”. The NEW grooved end design allows easier installation therefore cost are reduced.

Simplifying SCADA System Integration by getting it right the first time!
Accurate level control of storage tanks and reservoirs is vital. Level control valves tasked with this responsibility must also provide adequate water turnover and not upset the distribution system in the process of maintaining these levels. Hydraulic altitude valves, utilizing simple on/off control, have been performing this service since their inception in the 1940’s. Moreover, they can be equipped to maintain a fixed system backpressure or flow rate for system protection when applicable. Delaying the opening of the valve to a preset reservoir low level is also an option. The electronic equivalent of the hydraulic altitude valve is appropriate for applications that require changeable system variables such as backpressure, flow, and valve position or level. It utilizes the same main valve but has a different pilot system and method of control. The control system uses a Cla-Val 131VC-1 series controller, which supervises the main valve. The controller typically gets a remote set point from the SCADA system by way of an RTU. Shown below is but one strategy for remote level control. This particular one does not require the hydraulic altitude pilot system, although it may be used for backup control. It also provides better accuracy and less hassle if delayed opening on lowering reservoir level is required. The level shut off and reopening points are entered into the controller using actual engineering units rather than the trial and error method required for hydraulic versions. The 131 series control valve has two inputs available (PV1 & PV2). PV2 accepts the level transmitter signal for level control and PV1 the flow transmitter, which is used to control the flow rate into the reservoir. The diagram below illustrates the setup of the control system. The High Level shutoff and Delayed Opening band (in feet) are programmed into the controller. Then the flow range is programmed with either a local set point or a remote set point from a SCADA RTU, such as the Cla-Val VSU-1 Valve Station RTU. As level rises in the tank, the valve is open and under the control of the set point. When the level rises to the High Level, the valve closes. As the level falls the valve remains closed until it drops the amount of programmed Delayed Opening to the Low Level point, at which time the valve reopens with rate of flow control again.


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