Conventional Gate Valves
API 6A Gate Valves
Crown gate valves feature a full bore/thru-conduit design, in-line repairability and protected long-life seats. They are designed for all types of applications including wellhead, christmas tree, emergency shut-down systems, and choke and kill manifold systems. Our gate valves can be equipped with single or double-acting hydraulic or pneumatic actuators with manual override and fail-safe closed or open systems.
Our specialized and critical service gate valves are designed and manufactured through close consultation with customers to meet their application’s specific requirements and service type. This includes substituting our standard corrosion-resistant alloy SCR 6191 for solid Inconel™ type material and/or alloy-type clad gate valves for extremely severe and corrosive environments such as sour service, CO2, and water flood.
Gate Valve Designs
Parallel Expanding Gate Valve
This unidirectional expanding gate valve gives an extraordinarily high mechanical seating seal force that acts simultaneously against both seats. The seating force is not affected by line pressure fluctuations or vibrations.
Solid Slab Gate Valve
This gate valve design is made for demanding applications such as high pressure critical service choke and kill manifolds, and as a safety shut-off valve operated by a hydraulic or pneumatic actuator. Its bidirectional design with a floating gate moves parallel to the seats and effects a tight seal under differential line pressure. The nonrising stem has a backseating feature that allows the stem bearings or packing to be replaced under pressure.
Split Gate Valve
This bidirectional gate valve features a metal-to-metal seal between gates and seats, and seats to body. Sealing is enhanced by an auto-seal system in which internal body pressure transmits sealing compound from reservoirs in the seats to grooves around the seat bore, thus preventing leaks. The parallel non-wedging gates allow the stem to be left unstressed in either the open or closed position. Fully-skirted seats provide continuous protection of gate sealing surfaces. A backseating feature allows replacement of stem bearings or packing under pressure.
- 113/16” to 11”
- 2000 to 15,000 psi
- -75°F to +650°F (-59°C to +343°C)
- ISO 9001
- API 6A / ISO 10423 & Q1
- NACE MR-01-75