Product Digest
In this issue - ValvesBlock-and-Bleed Needle Valves Operate at High Pressures
MVBB series single block-and-bleed needle valves have a small valve body. They perform calibration operations by providing controlled flow to high-pressure hydraulic and pneumatic systems through both shut-off regulation and diversion. DBB series double blockand-bleed needle valves are made from cold-worked stainless steel or from 17-4-H1075 (which is Type 630 alloy that has been heat-treated at 1,065°F to 1,085°F for 3.75–4.25 h). DBB valves are suitable for pressure monitoring, chemical injection, and drain-line-isolation applications. Both series offer safe and reliable operation up to 20,000 psi.
Appeared In Issue: July 2009
High Pressure Equipment Co.
www.highpressure.com
Control Valve Has an Extended Range
The Fisher Control-Disk valve offers excellent throttling performance and is suitable for applications with varying pressure drops in the hydrocarbon, refining, chemical, pulp and paper, and metals and mining industries. Its wide control range is double that of typical butterfly valves, providing better adherence to the setpoint regardless of process disturbances, resulting in a reduction in process variability. The valve’s face-to-face and raised-face dimensions meet European Norm (EN) 593, American Petroleum Institute (API) 609, and Manufacturers Standardization Society (MSS) SP68 standards.
Appeared In Issue: July 2009
Emerson Process Management
www.emersonprocess.com
Butterfly Valves are Available in Large Diameters
Type 567 (wafer style) and Type 568 (lug style) butterfly valves are now available with large diameters (2–12 in. for Type 567 and 2–8 in. for Type 568). They feature a disc and liner made of polyvinylidene fluoride (PVDF) and seals made of polytetrafluoroethylene (PTFE) that provide excellent chemical resistance over a wide temperature range. Both valves have an operating temperature range of –20°C to 120°C (–4°F to 248°F), and can be electrically or pneumatically actuated. They also offer bidirectional capability and a high pressure rating of 150 psi. The valves are suitable for use in chemical processing, chlorine electrolysis, chemical production, food and beverage sanitation, pulp and paper, and steel production applications.
Appeared In Issue: July 2009
GF Piping Systems
www.us.piping.georgefischer.com
Plastic Diaphragm Valves Can Withstand Corrosives
DAB Series all-plastic diaphragm valves are rated to 150 psi and provide excellent handling of difficult media, such as corrosive fluids, abrasives and slurries. They are suitable for use in high-purity and sanitary applications. They are available in manual or actuated (pneumatic or electric) models, and have a multi-turn design that enables precise control. Valve bodies are available in 0.5–6.0-in.-dia. Polyvinyl chloride (PVC), 0.5–4.0-in. dia. chlorinated polyvinyl chloride (CPVC), 0.5–10.0-in.-dia. polypropylene (PPL), or 0.5–8.0-in.-dia. polyvinylidene fluoride (PVDF). Diaphragms can be made from ethylene propylene diene M-class rubber (EPDM), fluoroelastomer (FPM) or polytetrafluoroethylene (PTFE), and may be connected to the valve bodies with molded-in ANSI flanges, ASTM True Union socket-end connections, or threaded bodies.
Appeared In Issue: July 2009
Hayward Flow Control Systems
www.haywardflowcontrol.com
Multi-Function Unit Reduces Installation Costs
The Series PCWS — dubbed the “stick”— is a multi-function assembly that incorporates the features of a pressure regulator, pressure gage, and shut-off valve into a single unit. This construction eliminates the need for multiple joints and pipe sections, reducing installation costs. The all-thermoplastic stick is designed specifically for process cooling water, and can be used in a variety of applications where corrosion is an issue. Available body materials are Geon polyvinyl chloride (PVC) or Corzan chlorinated polyvinyl chloride (CPVC), with ethylene propylene diene M-class rubber (EPDM) or fluoroelastomer (Viton) seals. The stick’s pressure regulator can be set to supply downstream pressure from 5 to 125 psi.
Appeared In Issue: July 2009
Plast-O-Matic Valves, Inc.
www.plastomatic.com