Fmc Corporation

Robert L Witt

Tep Ungchusri

Roy C Bates

Stephen P Barrett

A plug or gate valve including two seats shaped as cylindrical segments and having a first continuous seal surrounding the flow passage and at least one satellite seal outside the first seal to reduce the area upon which pressure acts to force the segment toward the plug or gate.

Satellite seal arrangement for plug valve, ball valve or gate valve

A pipe connector device for interconnecting first and second pipe elements using a retention member removably secured to the first pipe element by load elements. The retention member is secured to the second pipe element by pipe threads or a second retention member can be secured to the second pipe element by load elements and the first and second retention members threaded together. A seal is extended along a portion of the length of the first and second pipe elements adjacent to an end portion of each of the pipe elements to prevent leakage. This provides a fluid-tight seal which is relatively independent of any pressure exerted between the first and second pipe elements by the retention member.

Pipe connector device

A fire-safe seal for use in a swivel joint in a pressurized fluid system subject to fire risk, the seal having both a metal anti-extrusion ring and an annular resilient non-metallic seal member to provide essentially zero fluid linkage at normal operating temperatures, and the anti-extrusion ring to provide an extremely low rate of leakage in the event high temperature should destroy the resilient seal member. A curved spring or other metal anti-cocking device biases the anti-extrusion ring tightly against the junction of a male and a female joint to ensure that the ring remains in position after the resilient seal member is destroyed to prevent leakage through the junction.

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Conroe, TX, United States of America

Robert L Witt