Modular Flow Trim Valve With Dry Gears for Harsh Service
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Solution Overview
Problem
Conventional valves in harsh environments, such as the oil and gas industry, suffer from erosion, corrosion, and operational degradation due to severe conditions, making them unsafe and costly to maintain.
Innovation Solution
A modular valve design with gears positioned out of the wetted environment to reduce maintenance complexity, a stem assembly that can be easily repaired or replaced without depressurizing the valve, and modular hubs with injection/monitor ports for chemical injection and pressure sensing, along with internal seals and quick-disconnect features for easy assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional valves are used in harsh environments, then they can control fluid flow, but they suffer from erosion, corrosion, and operational degradation
Solution Approach 1:
The valve is divided into modular components including replaceable trim elements, separable body sections, and interchangeable seals. This segmentation allows specific worn or corroded parts to be replaced without replacing the entire valve, thereby extending valve durability in harsh environments while maintaining reliable fluid flow control.
2Ease of operation
If gears are positioned in the wetted environment to control valve operation, then actuation is achieved, but the gears get clogged or fouled by sand or solid materials
Solution Approach 1:
The gear mechanism is extracted from the wetted environment and positioned in a dry cavity within the valve body. This separation allows the gears to perform valve actuation reliably without being exposed to sand or solid materials in the fluid stream, eliminating clogging and fouling issues while maintaining ease of operation.
3Ease of repair
If the entire valve apparatus must be depressurized for maintenance, then safety is ensured, but maintenance time and operational downtime increase
Solution Approach 1:
The valve incorporates a maintenance port that provides isolated access to the stem assembly and gear mechanism. This segmentation allows maintenance personnel to service these components while the valve remains pressurized and operational, dramatically reducing maintenance time and operational downtime while maintaining safety through controlled access.
4Ease of operation
If manual handles or automatic actuators are used for valve actuation, then valve control is achieved, but visual indication of valve position and actuation status is required
Solution Approach 1:
The valve incorporates a visual indication system using color-coded markings or indicators that change position or color to clearly show valve actuation status and position. This provides immediate visual feedback to operators without interfering with manual handle or automatic actuator operation, eliminating information loss about valve state.
Data Source
AI summary
A valve has flow trim assembly that can be quickly and efficiently removed and repaired or replaced. A body section having a central through bore defines an inlet, an outlet and inner chamber or space. An upstream cap and inlet hub are disposed at the inlet of the body member, while a downstream cap and outlet hub are disposed at the outlet of the body member. An actuator stem extends into the inner chamber, while a gear train can transfer torque force applied to the actuator stem to a rotator. A first (movable) trim member is attached to the rotator and can be selectively rotated relative to a second (fixed) trim member. The first and second trim members cooperate to adjust flow opening through the valve.