Stainless steel pilot valves for offshore applications
06 October 2011
ASCO Numatics has introduced the 361 series of stainless steel pilot valves featuring a novel design that eliminates 'sticking' problems in low cycle demand applications. These problems can occur in control valves installed in the pneumatic logic panels used to control safety monitoring systems in offshore oil and gas production facilities.
Corrosion-resistance and reliability are essential for safe operation in harsh offshore environments and the 361 series is designed to provide the highest reliability, with minimal maintenance, and lowest cost of ownership. The valve’s body is made entirely in 316L stainless steel and the Elgiloy and stainless steel springs are designed for corrosion resistance and severe service beyond 1 million cycles.
The 361 series feature innovative, highly reliable and proven T-seal technology that resists the dormancy issues that plague current valves using O-ring seals. O-ring designs can stick upon actuation in low-demand control valve applications. Research carried out by ASCO Numatics found that many users routinely hammer the sides of these valves to ensure they function properly.
The 361 series 1/4in, 3-way and 316L stainless steel valves are ATEX and IECEx approved (Ex d) and can be fitted with an explosion proof (low power) operator for use in Zone 1 and 2 hazardous areas. The 361 series is offered in manually operated, air piloted, and solenoid piloted versions and can be configured as breathing and non-breathing. The non-breathing version isolates internal components from the atmosphere and is internally vented, preventing contaminants such as salt and dust from entering the valve and corroding the internal components.
The valve’s balanced design maintains the same flow characteristics when the valve is used in a normally open or normally closed configuration. This provides symmetrical flow that enables more flexible setup of the control panel’s pneumatic logic. The 1.2 Kv provides almost double the flow of comparable spool technology. In addition, the valve’s innovative pilot-selector design allows the same unit to be used as an internally or externally piloted solenoid valve, simplifying ordering and reducing inventory.
ASCO Numatics has also recently expanded its range of universal position detector switches with the addition of a version featuring an integral M8 connector. Available in reed switch or electronic versions, the switches are the smallest on the market. The new M8 universal position detector switches are compatible with any standard ASCO Numatics cylinder − reducing inventory for users.
Quick and easy to install and adjust, the switches feature LED status indicators and are supplied with position stops and retaining clips. They are suitable for use with voltages of 5 to 120Vdc/ac, and are certified to CE, UL and cUL.
The new M8 versions join the existing line up of universal position detector switches, which include flying lead versions with M8, M10 or M12 connectors. There are also IP69K versions for food industry applications, and a range of accessories that covers mounting kits, adaptors, connectors and cable extenders.
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