National Oilwell 0040-AR-005A-03 2-1/8in GD AR PW-3 Valve Assembly

This is a new National Oilwell (NOV) GD AR (Anti-Rotation) Valve Assembly, part number 0040-AR-005A-03, also cross-referenced as 100SD0503, for use in PW-3 (Power Wave 3) series drilling equipment. The assembly measures 2-1/8 in. in diameter and consists of a cast iron/steel cage body with a three-arm spider retainer (marked "C-5" and "COORS"), a spring-loaded poppet with yellow elastomer seal, and a machined aluminum cup/retainer — all loosely assembled per factory packaging as noted on the OEM box. The "C-5" designation on the spider retainer indicates the valve cage grade/class, while the yellow seal is consistent with a Buna-N or urethane compound used in oilfield mud and fluid service. This AR valve assembly is designed to prevent rotation of valve components under high-cycle reciprocating pump conditions, ensuring consistent seating and extended service life in National Oilwell Power Wave fluid end applications. Made in the U.S.A. per the original OEM packaging from TPCI, Odessa, TX.

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