Engineered Equipment
  • lone oil
    AOP
    Backed by Cameron’s commitment to quality, customer service and product improvement, AOP valves deliver dependability at an affordable price.
  • lone oil
    DEMCO
    DEMCO Valves are the valves of choice, engineered and proven for drilling and production industries.


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AOP Industries

Oilfield Services, Inc., founded on Aug. 15, 1972, in the southern part of Oklahoma City, Okla., initially provided standard wellhead services to southern US oil and gas producers.  Only five years later, in 1977, after the company was purchased by Kaneb Services, Oilfield Services, Inc. was renamed as American Oilfield Products (the beginning of Cameron’s recognizable AOP™ brand today).  In 1988, the company purchased Inson Industries and began manufacturing API 6A and 6D gate valves, followed by a choke line in an acquisition of KF Industries, which helped to secure its status as a supplier for upstream North American and international markets.

Expanding their product line further, American Oilfield Products began producing floating ball valves, threaded check valves and needle valves.  Only in 1997 was the name American Oilfield Products officially changed to AOP Industries. At this time, AOP Industries built and moved into a new 60,000 sq ft (5574 sq m) building in Moore, Okla.

The portfolio of ball, swing check, needle and threaded check valves was supplied to end users through a specialized network of representatives and stocking distributors. AOP Industries was acquired by Cameron in 2004, and held a unique place in Cameron’s brand portfolio – now known as the trademarked AOP brand – moving back to its origins in Oklahoma City in 2011 to utilize Cameron’s existing technologically advanced facility there.

Backed by Cameron’s commitment to quality, customer service and product improvement, AOP valves deliver dependability at an affordable price.

Floating Ball Valves

AOP Industries offers a wide range of threaded and flanged floating ball valves. The design has been developed and based on our customer’s demands and requirements. When you specify an AOP ball valve, you have selected the premier equipment offered in the industry.

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Check Valves

AOP is a preferred supplier to the oil and gas industry. The Series SC full opening through conduit bubble tight seal check valves are designed, manufactured, tested and monogrammed in accordance with API 6D requirements. Series SC check valves are qualified to API 6FD fire test and NACE. The rugged Series 310 threaded check valve offers dependability in demanding applications. Minimizing down time and lowering operating cost. All AOP check valves are inline field repairable.

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Trunnion Ball Valves

The D Series two-piece, end entry trunnion ball valve offers unparalleled craftsmanship and superior performance. A wide range of trims are available including Nace MR-0175 and explosive decompression resistant o-rings. AOP trunnion ball valves are manufactured and tested in conformance with API 6D and 6A specifications as well as API 6FA Fire Test as standard.

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Gauge and Needle Valves

Gauge and Needle valves are constructed with heavy duty body, threaded bonnet with locking pin, back seat design, and o-ring stem seal. AOP Needle valves include soft and metal seated design options. Valves manufactured of 316ss meet NACE MR0175 (rev 2002) standards.

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Cameron is a leading provider of flow equipment products, systems and services to worldwide oil, gas and process industries. Leveraging its global manufacturing, engineering and sales and service network, Cameron works with drilling contractors, oil & gas producers, pipeline operators, refiners and other process owners to control, direct, adjust, process, measure and compress pressures and flows.

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Our Facilities

Engineered Equipment maintains three stocking warehouses convenient to major production areas.

EEI Warehouse
Casper, Wyoming

EEI Warehouse
Farmington, New Mexico

EEI Warehouse
Williston, North Dakota