Figure F9. Up to three submersible/remotely operated vehicle-installable CORK head OsmoSamplers can be mounted on the rack contained within one of the bays on the head of each Expedition 301 CORK. The OsmoSamplers are mounted on steel plates containing valves and fittings. A. Shown from left to right are (1) a seafloor OsmoSampler being installed, (2) an installed and locked OsmoSampler, and (3) an empty rack. Each OsmoSampler plate is positioned with a bottom shoe and a top alignment track and locked into place with a rotating T-handle at the top of the plate (vertical = unlocked; horizontal = locked). There are two valves for each OsmoSampler mounted on the CORK head, below the sampler plates, and two additional (optional) valves on each OsmoSampler are used to control sample and pressure-compensation lines. These valves rotate 90°, where vertical = CCW = open and horizontal = CW = closed. B. Detail of OsmoSampler nipple assembly mounted in CORK head, allowing connection to sample tubing extending to isolated intervals at depth. Nipples are machined from titanium and mounted in a high-density polyethylene (HDPE) block. C. Dimensions for nipple assemblies. Each removable OsmoSampler incorporates two mating female polyetheretherketone (PEEK) connectors. D. Cross-section detail of nipple assembly showing (1) nipples mounted in (2) HDPE block, (3) PEEK connectors, and their (4) retaining rings held by (5) set screws and an alignment pin. The locations of the (6) permanent frame and the (7) OsmoSampler plate are shown as dashed lines. These are 1.27 cm apart when fully mounted.
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