Parker Instrumentation has released a PED-certified, proportional relief valve for process instrumentation applications, with the ability to provide protection on an extremely broad 150 to 6,000 PSIG (10.3 to 414 bar) pressure range.
CE marked and certified to the highest Category-IV level of the Pressure Equipment Directive (PED), which covers a wide range of applications including hydraulic fluid power equipment, Parker will set and test the new valve at the factory for specific application pressures, and laser etch the valve body with the cracking pressure. The new valve provides a simple "fit and forget" solution for adding reliable safety, environmental, and/or equipment protection to a wide variety of process and laboratory instrumentation applications, that needs no testing or calibration by the end user.
Designated HPRV, the new valve is available with 0.142 inch/3.6 mm flow ports.
Compared with some competitive relief valves, the Parker model provides great resolution over crack pressure settings. A low-friction stem seal design further aids control of cracking pressure, which is maintained to within 3 percent of the setting. Precision and repeatability is also aided by the valve's balanced poppet design, which ensures consistent cracking operation regardless of system back pressure up to 2,000 psig (138 bar).
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