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10 PRESSURE CONTROL GROUP NATIONAL OILWELL VARCO Valves Type B Manual Gate Valve Customer Support Type DB Manual Gate Valve Type HB Subsea Valve Frac Valve Gate Valves Choke and Kill Manifolds National Oilwell Varco's line of Shaffer gate valves has been manufactured since the 1920 s. Type B gate valves are designed specifically for choke and kill manifold service and as isolation valves for outlets on BOP stacks. One-piece, slab-type gates seal fluids from either direction and are particularly suited to the demanding conditions of mud service. The seal is always effected against the downstream seat, and upstream pressure is in the body cavity at all times. This feature lowers handwheel torque requirements. Our choke and kill manifolds are manufactured for diverse applications from simple low pressure environments to extreme sour gas service. National Oilwell Varco s wide array of fixed, handadjustable and remotely-adjustable chokes can be furnished in a 5,000, 10,000 and 15,000 psi manifold with or without a buffer chamber. OEM Spare Parts National Oilwell Varco s high quality OEM spare parts are vital to safe and efficient operations. Shaffer s parts are manufactured, inspected, and tested in-house to ensure performance and quality every time under the most demanding conditions. NOV s line of Shaffer products are continuously upgraded to meet changing requirements and use of genuine OEM parts ensures optimum equipment performance. Comparison tests between Shaffer and non-oem ram rubbers demonstrate that NOV s Shaffer manufactured ram rubbers outperform the others by as much as 81%. Type DB hydraulic valves are very reliable in choke and kill manifold applications which require remotely operated valves. Type HB hydraulic valves are widely used in subsea BOP stack applications which require remotely operated choke and kill line valves adjacent to the blowout preventers. Type B, DB, and HB valves are available with API PSL 3 and PR2 rating. The Shaffer gate valve line has recently been enhanced with the addition of the SureSeal Gate Valve. This unit offers bi-directional flow for versatility and increased service life. Incorporating a non-rising stem with slab gate, floating seat ring, and body bushing, this design provides safe, dependable service in a variety of environments including BOP stacks and choke and kill manifolds. National Oilwell Varco is committed to supplying quality after-the-sale customer service. Our factory trained service engineers can use high quality original parts or reconditioned components to perform repairs to factory specification. With customer support centers strategically located worldwide, NOV keeps your equipment in first class operating condition year round. NOV provides OEM (original equipment manufacturer) parts, factory repairs, and field repair/service. All Shaffer products are backed by over 65 years of experience. Factory Specification Repairs Because repairs are performed to strict manufacturing specifications, each repair to pressure control or motion compensation equipment is fully inspected, tested, and safe for continuing operations. Shaffer repair operations are equipped with the latest in machining, welding, and coating technology so that each repair can be carried out quickly, safely, and efficiently. Every repair is backed by the knowledge of NOV technicians, engineers, and inspectors, all trained to provide attention to the smallest detail. Also, each Shaffer factory repair is fully warranted. Factory Trained Service Technicians The team of factory-trained service technicians provides over 200 years of combined field experience. To help eliminate costly downtime caused by offsite repairs, technicians can conduct field modifications and repairs. NOV technicians can also troubleshoot customers' systems and make recommendations on maintenance and operation to improve performance. Choke and Kill Manifolds w w w. n o v. c o m c o r p o r a t e m a r k e t i n n o v. c o m