Aerial view of a power generation plant during sunset Aerial view of a power generation plant during sunset
Anderson Greenwood Series 200, 400

Anderson Greenwood Series 200, 400

With a track record of more than 50 years, these pilot valves are designed for a wide range of applications, from basic to the most severe service conditions.

Series 200 Snap Acting Pilot Operated Relief Valve

The Series 200 is a snap-acting design ideal for gas, vapor, and mixed phase services, including dirty and/or wet applications. It features a non-flowing pilot that provides system overpressure protection from 25 to over 6170 psig. The Series 200 is widely recognized as the industry benchmark for pilot pressure relief valve performance.

Series 400 Modulating Pilot Operated Relief Valve

The Series 400 pilot operated relief valve features a modulating, non-flowing pilot design optimized for gas and/or liquid services, including dirty and/or wet services. The modulating action is strongly preferred for liquid relief because it minimizes the destructive effects of ‘liquid hammer’.

Under process conditions, both pilot and main valve can be tightened to as high as 98 percent of set pressure. The main valve lifts proportionally, according to the required flow (relief demand), to prevent process pressure from exceeding the code allowance. 

Complete Pressure Relief Solutions

Whether you’re replacing an existing system or designing a new one, we offer complete services including valve sizing, selection, testing, and certification. Count on our experts to deliver fully compliant and application-specific pilot operated valve solutions.

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Request a Quote

610.495.1835
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We Have the Valves You Need, When You Need Them

Proconex has an extensive inventory of control, isolation, and pressure relief/safety valves—all the brands you need. We stock most valves and related devices at one of our three regional warehouses and have access to many more through our Emerson partnership. When it comes to valve automation, we offer the largest portfolio of actuators and controls available in the market today. We have the applications experience and customization capabilities to find the optimum solution for your valve automation needs. In addition, we offer quick delivery and a range of services to keep your plant operating safely and efficiently.
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