Archives :: Processing & Handling :: Liquid, Gas and Air Handling :: Valves

Displaying 1 - 20 of 208 stories.
September 1, 2014
The Fisher Fieldview DVC6200p series of digital valve controllers is an ideal solution for applications in which accessibility, extreme temperatures (up to 120°C), extreme vibration or confined...
September 1, 2014
Hayward Flow Control Thermoplastic butterfly valve enables many stopping positions With its advanced, one-piece thermoplastic design and construction, the patent-pending BYV Series Butterfly Valve offers a variety of design advances, including a hand lever that features a 72-spline interlock mechanism that allows for 19 stopping positions (every 5 deg). Pneumatic or electric actuators are available...
July 1, 2014
New safety and environmental regulations, longer plant uptime and changes in maintenance practices have created new requirements across the chemical process industries (CPI). Among the plant equipment affected by these changes are control valves, since they are used in numerous applications in a variety of process conditions. Figures 1 and 2 show typical control valves installed in CPI plants. The primary...
June 1, 2014
Larger valves (200 mm and above, with flowrates in excess of 200 m3/h) tend to be fitted with pneumatic actuators. However, the air-output capacity required to achieve fast positioning in larger actuators is simply too high for normal positioners and accuracy can be compromised...
March 1, 2014
The CSF Steam Water Mixer provides a reliable source of hot water that is delivered at the correct temperature and pressure. The mixer is a safe and...
March 1, 2014
The portfolio of Neles ceramic E-Series control valves (photo), recognized for being extremely erosion resistant, has now been expanded to NPS 8 in. (DN 200) in pressure Class 300 (PN40). The E-series valve is the most...
March 1, 2014
This company now offers its new SQEx.2 part-turn actuator  — the explosion-proof version of its SQ actuator, which was introduced at the beginning of 2013. In line with qualification requirements for hazardous...
March 1, 2014
This multi-port valve block from the iComLine Series is made of ultra-pure PVDF and features innovative seat-diaphragm technology with PTFE. This combination allows very heavy-duty...
January 6, 2014
A new online Material Selection Guide is available from DeZURIK (Sartell, Minn.; This convenient web application makes it quick and easy to determine which metals or elastomers are suggested as suitable for valves in...
October 1, 2013
Let’s face it, valves may not be the most glamorous piece of equipment in a chemical process industries (CPI) facility, but no plant can function without them. In addition, multiple challenges and issues specific to the chemical processing industry affect valves and valve performance. For these reasons, selecting the right valve — one that will stand up to the rigors and demands of the chemical...
October 1, 2013
The Type 6624 TwinPower rocker valve consumes no energy after the switching process. The standard rocker valve has two seats, which are opened and closed with electric current. They return to the...
September 1, 2013
The new intelligent positioner TopControl Basic, Type 8694 is designed for applications in hygienic process environments. With a compact design, it is optimized for integrated mounting on the company’s...
August 1, 2013
With the first phase launch of the Neles globe control valve (photo) in Asia Pacific, China and India, this company now plans a global launch to follow in 2014. The new globe valve builds and expands on technology and service capabilities acquired...
August 1, 2013
The new Euro Trim Model E2 in stainless steel is designed for use with the company’s Model E and E3 Wet Alarm Valves (photo). This new trim has a rated working...
August 1, 2013
The new motorized actuation of the 2030 series valve actuator (photo) is composed of an electric stepping motor (400 steps per revolution), a flexible coupling, a gear box and stroke...
July 1, 2013
A new range of compact, lightweight motorized valves has been introduced for applications where electric actuation is required. The valves are quiet in use, and can be operated by a 24-V d.c. power...
July 1, 2013
Rotary valves are used almost universally in pneumatic conveying systems. They serve three main functions: 1) to provide a pressure-seal (airlock) between two adjacent processes, 2) to provide solids metering (feeding) and 3) to provide a combination of solids metering and a pressure-seal for feeding solids into a pneumatic conveying system. Rotary valves are common devices for feeding solids into a...
May 1, 2013
Minimizing process variability is an important component of a plant’s profitability. The performance of control valves within process control loops has a significant impact on maintaining consistent processes. This refresher outlines some of the important aspects of control-valve performance, including parameters of both the static response and the dynamic response. Static response A valve’s...
May 1, 2013
For 40 years, this company has developed and manufactured bellows-sealed globe valves (photo) for hazardous applications in the chemical, petrochemical and nuclear industries. The...
May 1, 2013
The EasiDrive portable valve actuator effortlessly opens and closes valves in petroleum refineries, power plants, paper mills and chemical processing plants. Generating a torque of up to 2,000 Nm, this tool enables a...
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