Cornerstone Valve designs and manufactures severe-service ball valves for demanding industrial applications where reliability, shut-off integrity, and long service life are critical. Our engineered-to-order solutions are developed around the actual operating conditions of each project, including pressure, temperature, media characteristics, corrosion risks, and documentation requirements.

Cornerstone’s core expertise includes metal-seated and soft-seated isolation valves designed for severe process environments across oil and gas, petrochemical and refining, power generation, mining, infrastructure, defense, and other industrial markets. From material selection through final inspection, each valve is configured to support dependable performance in challenging service conditions.

Typical applications include high pressure drop, flashing and multiphase flow, abrasive or contaminated media, high-velocity flow, cavitation, erosion, and other critical isolation duties where conventional valve solutions may not provide the required lifecycle performance.

Key features:

• Engineered-to-order configurations
• Metal-seated and soft-seated options
• Bubble-tight shut-off capability
• Severe-service design focus
• Application-driven material selection
• Project documentation and traceability support

Cornerstone Valve designs and manufactures engineered Double Block & Bleed (DBB) ball valves for critical isolation applications where operational safety, pressure containment, and reliable shut-off performance are essential.

Our BNB (Ball–Needle–Ball) Series integrates two independently operated ball valves with an intermediate needle valve, providing two isolation barriers and a controlled means of venting or bleeding pressure between them.

Designed for demanding industrial environments, Cornerstone DBB solutions support high-pressure applications across oil and gas production, offshore facilities, pipelines, petrochemical processing, refining, and other critical process systems.

Key Features & Capabilities

• Dual Isolation: Two independent ball valves provide separate mechanical barriers for process isolation.

• Integrated Bleed System: Intermediate needle valve enables controlled venting, depressurization, and verification of the isolated section.

• Engineered Construction: Available in application-specific configurations, including 1-, 2-, and 3-piece designs.

• Seating Options: Metal-seated and soft-seated configurations to meet process requirements.

• Material Flexibility: Carbon steel, stainless steel, duplex stainless steel, chrome-molybdenum alloys, nickel-based alloys, and other specialized materials upon request.

• Severe-Service Capabilities: Optional ball and seat coatings, corrosion-resistant alloy overlays, fire-safe construction, and enhanced stem sealing arrangements

Cornerstone Valve specializes in solving complex isolation challenges through custom-engineered ball valve solutions. For applications where standard catalog valves are not sufficient, Cornerstone develops application-specific designs tailored to the process, operating conditions, standards, and documentation requirements of the project.

The company’s official website emphasizes its ability to provide highly specialized valve solutions for unique and sometimes unforeseen requirements, serving distributors, end users, EPCs, and fabricators alike. This custom-engineering approach supports compliance with rigorous standards, material requirements, severe-service operating conditions, and demanding end-user specifications. 

Typical capabilities include:

• Engineered-to-order configurations
• Special materials and trim selections
• Pressure/temperature-driven custom design
• Severe-service and critical isolation applications
• Documentation and compliance support
• Fit-for-purpose solutions for unique project needs

Cornerstone Top Entry Trunnion Ball Valves are engineered for critical isolation applications where maintainability, reliability, and lifecycle cost matter. The top-entry construction allows access to internal components without removing the valve from the line, helping reduce maintenance time and production downtime.

These valves are particularly suitable for severe-service duties in oil and gas topside, offshore production, refining, power generation, and other demanding industrial services. Cornerstone’s top-entry designs can be configured to address high pressure, corrosive media, abrasive service, and severe operating environments where robust valve performance is essential.

According to Cornerstone’s official Oil & Gas Topside brochure, the top-entry trunnion-mounted design is serviceable in-line, with internal components accessible without removing the valve from the pipeline. The brochure also highlights benefits such as reduced weight, space savings, corrosion-resistant overlay options, and testing to API 6A and API 6D criteria. 

Key features:

• Trunnion-mounted design
• In-line serviceability
• Reduced maintenance downtime
• Suitable for severe offshore and topside environments
• Configurable for demanding pressure/temperature conditions
• Available for application-specific engineered solutions

Cornerstone End Entry Ball Valves are engineered for dependable isolation in severe-service applications requiring robust pressure containment, reliable shut-off, and application-specific design flexibility. These valves are developed for challenging process services across oil and gas production, refining, cryogenic service, and other industrial environments.

The company’s official product and resource pages identify end-entry valves as a core part of the Cornerstone portfolio, including standard and specialized configurations tailored to process conditions, materials, and compliance requirements. Cornerstone’s approach focuses on translating actual service conditions into a practical valve solution, with support for material expertise, quality documentation, and project-specific engineering. 

Key features:

• Robust engineered construction
• Suitable for critical isolation duties
• Configurable body and trim materials
• Designed around project-specific operating conditions
• Supported by engineering, documentation, and traceability

Cornerstone Subsea Ball Valves are designed for demanding offshore and subsea applications where reliability, long unattended service life, and safe operation are critical. According to Cornerstone’s official products page, these valves are intended to operate under extreme hydrostatic pressure, near-freezing temperatures, corrosive seawater conditions, and long-duration service environments, making them suitable for deepwater production and HPHT well systems. 

These solutions are particularly relevant for offshore oil and gas developments that require robust isolation performance and application-driven engineering.

Key features:

• Designed for harsh subsea environments
• Long-life performance focus
• Suitable for offshore, deepwater, and HPHT service
• Engineered for safe operation and reduced maintenance exposure