anderson greenwood pressure safety valve factory

Anderson Greenwood pressure relief valves, tank protection products, primary isolation valves, and instrumentation set the industry standard for repeatable service and long service life. The breadth of Anderson Greenwood product offerings for both standard and specialized installations combined with unmatched application expertise, product quality, and availability provides for complete valve solutions in the oil and gas, chemical, power generation, and refining industries.

Through our “VR” certification from the National Board of Boiler and Pressure Vessel Inspectors, Cornerstone provides “24/7” asset management and repair services for all brands of pressure relief products in ASME Section I and VIII applications and is capable of testing on steam, air/gas, and liquid medias.

Anderson Greenwood Crosby is a US manufacturing company that produces valves for industrial processes, including pressure relief and tank protection valves. The firm was established as Anderson Greenwood in 1947 in Houston, Texas by Marvin Greenwood, Ben Anderson, and Lomis Slaughter Jr to produce a light aircraft, the AG-14. This project never made it past the prototyping stage, but involvement in a missile project soon thereafter saw the firm focus on valve design. In the 1970s, the firm owned the Bellanca name for a while, and during this time attempted to market a new light plane design as the Bellanca Aries, but was short lived with only 4 being sold.

It was purchased in 1986 by Keystone International, in turn acquired by Tyco Flow Control in 1997, with Anderson Greenwood being maintained as a subsidiary. It was subsequently merged with Crosby, another Tyco acquisition.

WPC provides customers with total pressure relief management solutions that support a facility’s entire lifecycle, transforming the way you ensure plant safety. Using Emerson comprehensive range of Pressure Safety Valves and WPC Engineering Services team ensures that the design of your pressure relief system is done correctly to respond to every overpressure scenario.

Since 1874, Crosby direct spring operated safety and relief valves have been among the world’s most widely used relief valves for gas, liquid, steam and multi-phase applications in Oil & Gas production, refining, petrochemical and chemical processing systems as well as for utility and industrial steam generators & steam systems in power generation facilities.

In the highly specialized field of pressure relief devices, no manufacturer can match the diversified products and experience of Emerson comprehensive range of Pilot operated Pressure Safety Valves with brands like Anderson Greenwood and Birkett.

With more designs than any other worldwide manufacturer, Anderson Greenwood’s and Birkett"s product technology solves applications from the most severe problem to very basic service conditions. These designs include a high temperature metal seated pilot valve, premium performance spring operated valves, API 526 flanged conventional and balanced bellows valves and an extensive iron and bronze product range.

Bubble-tight seats near set pressure: Allows higher system operating pressure and, therefore, maximum process output; not as sensitive to vibrational and pulsating service; reduces product loss.

Modulating action available: Minimized product loss per relief situation; reduced environmental pollution; avoids oversizing consequences; not as sensitive to inlet pressure losses as pop action.

Full lift at set pressure: No overpressure required for full lift; allows D.O.T. installation to be set higher than Maximum Allowable Operating Pressure (MAOP) when pop action is used.

High Gain Modulating Action available on 400 Series pilots providing full main valve lift by 5% overpressure while minimizing product loss during relief events.

Minimizes possibility of freeze-up in applications involving a cryogenic or refrigerant and allows for D.O.T. applications to be set higher than Maximum Allowable Operating Pressure.

Type 81P spindle design balanced against the effects of back pressure without the use of a bellows, reducing both initial purchase and associated long-term maintenance costs.

Protect your people and your processes with reliable equipment. Emerson leads the industry in pressure and safety relief valve design, with over 140 years of technical and application expertise providing custom engineered solutions for O&G, Refining, Chemical, Petrochemical, Process, and Power applications. Valve designs meet API 526, ASME Section I, ASME Section IV & ASME Section VIII, and additional global standards.

As Emerson"s Impact Partner in the Rocky Mountain area, we are proud to bring you leading pressure relief valve brands like Anderson Greenwood, Crosby, and Sempell.

About AG’s 63B Safety ValveType 63B valves are direct spring-operated safety valves suitable for medium set pressure gas, vapor and liquid or gas thermal relief applications. Specific valve types are available for gas, vapor, liquid; gas or liquid thermal relief, steam, cryogenic and chemically active applications.

The 63B’s brass construction offers an economical valve for carbon dioxide, natural gas and general gas or vapor services. Yet, these relief valves use special internals and soft seals to provide optimum accurate performance.

About Seal Tightness Performance SpecsAll pressure relief valves are checked for seal leakage per procedures outlined in API 527. The following operating pressures will allow for bubble-tight seat sealing performance.