BALL VALVES

Ball Valves for Reliable Process Isolation.

Avasi Energy supplies industrial ball valves in Sabah and Malaysia, supporting isolation requirements across oil & gas, petrochemical, energy and process industries.

Our sourcing scope covers floating and trunnion-mounted ball valves, from general industrial isolation duties to project-specific API valve requirements, manual operation and complete actuated valve packages.

Each enquiry is reviewed against the specified valve design, size, pressure class, body and trim materials, bore, seat construction, end connection, service conditions, actuation, testing and documentation requirements.

Based in Kota Kinabalu, Sabah, Avasi Energy works with suitable valve manufacturers and supply partners in Malaysia and internationally to coordinate ball-valve requirements according to customer datasheets, material requisitions and project specifications.

A ball valve uses a bored spherical closure element that rotates through approximately 90 degrees between the open and closed positions.

When aligned with the piping bore, flow passes through the valve. When rotated to the closed position, the solid portion of the ball isolates the flow path.

• Ball valves are widely selected for applications requiring:
• Fast On-Off Operation
• Reliable Isolation
• Relatively Low Flow Restriction in Suitable Full-Bore Designs
• Compact Quarter-Turn Operation
• Manual or Automated Operation

The exact valve design must still be matched to the actual service conditions.

Floating Ball Valves

Compact, Proven Isolation for Suitable Applications.

In a floating ball valve, the ball is supported by the valve seats rather than mechanically anchored at both ends.

Under pressure, the ball can move slightly toward the downstream seat, contributing to the sealing action.

Depending on the manufacturer and application, configurations may include:

• One-Piece
• Two-Piece
• Three-Piece
• Flanged Ends
• Threaded Ends
• Socket-Weld Ends
• Butt-Weld Ends
• Full or Reduced Bore
• Manual or Actuated Operation

Floating ball valves are commonly used across industrial and process applications within the size, pressure, material and service limits of the selected design.

Trunnion-Mounted Ball Valves

Engineered for Demanding Isolation Duties.

In a trunnion-mounted design, the ball is mechanically supported by trunnions or bearings, while the seats move toward the ball to provide sealing.

This construction is widely applied in larger sizes, higher-pressure systems and demanding oil & gas or pipeline applications.

Depending on manufacturer design and project specification, requirements may include:

• Side-Entry Construction
• Top-Entry Construction
• Fully Welded Construction
• Full or Reduced Bore
• Soft or Metal Seats
• Flanged / Butt-Weld / Project-Specified Ends
• Manual or Actuated Operation

MIR Valve’s current API 6D portfolio, for example, offers side-entry, top-entry and fully welded trunnion ball valves with full/reduced bore, soft/metal seats and manual or actuated configurations for onshore, offshore and subsea duties. Mir Valve

This is not a “good versus better” comparison.

The correct design follows the service conditions and project specification.

Full Bore

A full-bore ball valve is designed with an internal flow passage intended to closely correspond to the adjoining piping bore according to the governing valve standard and manufacturer design.

Full-bore valves may be required where the piping system calls for minimal internal restriction or, in certain pipeline designs, pigging capability.

Pigging suitability should be confirmed against the actual valve design and project requirements rather than assumed solely from the phrase “full bore”.

Reduced Bore

A reduced-bore ball valve uses a smaller internal passage through the ball.

This can offer a more compact or economical valve solution where the resulting restriction and pressure loss are acceptable to the process design.

API 608 specifically recognises full-bore and reduced-bore metal ball-valve configurations, while API 6D ball-valve manufacturers also offer both arrangements.

Soft-Seated Ball Valves

Soft-seat designs use polymeric or other engineered non-metallic seating materials.

Depending on the selected material and valve design, they can provide tight shut-off for many general hydrocarbon, gas and industrial process applications.

Seat-material selection must consider:

• Process Fluid
• Temperature
• Pressure
• Chemical Compatibility
• Operating Frequency
• Project Leakage Requirements

Metal-Seated Ball Valves

Metal-to-metal seating may be specified for demanding services involving conditions such as:

• Elevated Temperature
• Abrasive Media
• Erosive Service
• Solids
• Severe Cycling
• Project-Specific Severe-Service Requirements

The exact suitability depends on manufacturer design, coating/hard-facing technology, leakage acceptance and service conditions.

Avasi Energy sources the seat design specified by the customer’s engineering requirement rather than presenting one seat construction as universally superior.

For trunnion and engineered ball valves, the body configuration can form an important part of the project requirement.

Side-Entry Ball Valves

Bolted side-entry designs allow the body to be disassembled after removal from the piping system where supported by the manufacturer design.

Top-Entry Ball Valves

Top-entry designs provide access to internal components from the upper body area and may be selected where in-line maintenance philosophy forms part of the project specification.

Fully Welded Ball Valves

Fully welded body construction eliminates conventional bolted body joints and is often associated with selected pipeline, underground or long-term buried-service applications.

Final selection should follow project design and maintenance philosophy.

Depending on ball-valve design and application, end connections may include:

• Raised-Face Flanged — RF
• Ring-Type Joint — RTJ
• Butt-Weld Ends — BW
• Socket-Weld Ends — SW
• Threaded Ends
• Hub / Special Connections, where specified

The connection must align with:

• Piping Class
• Flange Standard
• Pipe Schedule / Wall
• Pressure Rating
• Material
• Installation Requirement

For butt-weld valves, end preparation and transition requirements should be reviewed against the connecting pipe specification.

Ball valves are particularly suited to automated quarter-turn operation.

Avasi Energy can coordinate operating configurations including:

1. Manual
   • Lever
   • Gear Operator
2. Pneumatic Actuation
   • For remote on-off service and selected automated duties.
3. Electric Actuation
   • For motor-operated valve requirements and integration with plant electrical/control systems.
4. Hydraulic Actuation
   • For selected pipeline, emergency or high-torque applications.
5. Gas-Over-Oil / Specialist Actuation
   • Where specifically required for pipeline or project applications and supported by the selected manufacturer/integrator.

Avasi can coordinate complete actuated ball-valve packages through suitable valve manufacturers, actuator suppliers and integration partners according to project requirements.

Depending on project requirements, an actuated ball-valve package may include:

• Ball Valve
• Pneumatic / Electric / Hydraulic Actuator
• Mounting Kit
• Solenoid Valve
• Limit Switch Box
• Position Indicator
• Positioner
• Air Filter Regulator
• Speed Controls
• Local Control Panel, where specified
• Tubing & Fittings, where specified
• Emergency Shutdown Accessories, where applicable

Actuator sizing should be based on the valve manufacturer’s torque data, differential pressure, operating conditions, required safety factor, operating time and fail position.

For selected trunnion-mounted and pipeline ball valves, project specifications may require particular seat and isolation arrangements.

These may include terminology such as:

• Self-Relieving Seats
• Double Piston Effect Seats
• Double Block & Bleed — DBB
• Double Isolation & Bleed — DIB

The terminology should be applied according to the governing standard and actual valve design.

Different seat arrangements can behave differently with respect to body-cavity pressure and isolation performance, so don’t treat “DBB” and “DIB” as marketing synonyms.

Where these functions are required, the enquiry should clearly state the project specification and required seat arrangement.

Depending on service conditions, ball-valve materials may include:

1. Carbon Steel

   • Common for oil & gas and general process applications.

2. Low-Temperature Carbon Steel

   • Where low-temperature toughness requirements apply.

3. Stainless Steel

   • For selected corrosive process applications.

4. Duplex & Super Duplex Stainless Steel

   • For selected offshore, marine and corrosive-service environments.

5. Alloy Steel

   • For elevated-temperature or specialised services.

6. Nickel & Special Alloys

   • For severe corrosion or project-specific applications.

The complete material requirement may include separate specifications for:

• Body
• Closure / Ball
• Stem
• Seats
• Seat Retainers
• Bolting
• Seals / O-Rings
• Packing
• Wetted Trim

Depending on the project, additional requirements may include:

1. Fire-Safe Qualification

   • Ball valves may require fire-tested design according to the applicable project standard.
   • API 607 currently covers fire testing for quarter-turn valves and valves equipped with non-metallic seats. API lists its 8th edition as the current published edition.

2. Fugitive Emissions

   • Where stem and body-joint emissions are controlled by project requirements, qualification may involve:
     • API 641
     • or
     • ISO 15848
     • depending on the project specification.
   • API 641 specifically addresses fugitive-emission type testing of quarter-turn valves, while ISO 15848-1 remains current for industrial-valve fugitive-emission qualification.

3. Sour Service

   • Where H₂S-containing service requires material restrictions and qualification under the applicable project requirements associated with NACE MR0175 / ISO 15156.

4. Cryogenic Service

   • May require project-specific materials, extended stem/bonnet arrangements, seat construction and cryogenic testing.

5. High-Temperature Service

   • May require metal seats, special packing, stem sealing and materials suitable for the operating temperature.

6. Buried / Underground Service

   • May require extended stems, sealing arrangements, coating and installation features according to pipeline requirements.

7. Anti-Static Requirements

   • Where electrical continuity between ball, stem and body is specified.

8. Anti-Blowout Stem

   • Where required by valve design and project specification.

All special-service features should be supported by the selected manufacturer’s design and qualification documentation.

Depending on application and project specification, requirements may include:

1. API 6D

   • For applicable pipeline and piping valve requirements.

2. API 608

   • Metal ball valves with flanged, threaded and welding ends.

3. ASME B16.34

   • Valve pressure-temperature ratings, materials, dimensions, NDE, testing and marking for applicable valve construction.

4. ASME B16.10

   • Face-to-face and end-to-end dimensions where applicable.

5. API 598

   • Valve inspection and testing where specified.

6. API 607

   • Fire testing for applicable quarter-turn valves.

7. API 641 / ISO 15848

   • Fugitive-emission qualification where specified.

8. NACE MR0175 / ISO 15156

   • For applicable H₂S-containing oil & gas environments.

Depending on valve design, manufacturer capability and project specification, Avasi Energy can coordinate:

1. Pressure & Leakage Testing
2. Shell / Body Hydrostatic Test
3. High-Pressure Seat Test
4. Low-Pressure Pneumatic Seat Test
5. Closure / Leakage Test
6. Full Differential Pressure Test, where specified and applicable
   • API 598 is a key valve inspection and testing standard, while API 6D contains additional requirements for applicable pipeline valves.
7. Factory Acceptance Test — FAT
   • Customer or third-party witnessed testing according to the approved ITP/procedure where required.
8. Ball Valve Torque Testing
   • Where included within the project requirement.
9. Fugitive Emission Testing
   • Where specified and supported by the manufacturer’s qualification/testing arrangement.
10. Material Verification
    • MTC / MTR
    • PMI
    • Hardness Testing
    • NDE / NDT
    • Third-Party Inspection — TPI
      • By customer-approved inspection agencies where required.

Depending on project scope, the valve documentation package may include:

• Valve Datasheet
• Approved GA / Sectional Drawing
• Material Test Certificates — MTC / MTR
• EN 10204 3.1 / 3.2, where specified
• Inspection & Test Plan — ITP
• Pressure & Leakage Test Reports
• FAT Report
• Third-Party Inspection Report
• Fire-Safe Type-Test Certificate, where specified
• Fugitive-Emission Qualification Documentation, where specified
• Torque Data
• Actuator Sizing Calculation, for actuated packages
• Actuator & Accessory Datasheets
• Certificates of Conformity / Compliance
• Operation & Maintenance Manual
• Recommended Spare Parts List
• Manufacturing Record Book / Data Book

The exact document index should be agreed during technical and commercial review.

Engineering teams need confidence that the valve:

• fits the duty
• meets the design requirement
• uses the correct materials
• has the correct seat configuration
• is properly operated or actuated

Procurement teams need confidence that:

• the scope is clear
• compliance is documented
• testing is defined
• commercial exceptions are visible
• delivery requirements are understood

Avasi Energy coordinates both sides of that requirement.

1. Basic Valve Information
   • Size / NPS
   • Pressure Class / Rating
   • Floating or Trunnion, if specified
   • Full or Reduced Bore
   • Body Construction, if specified
   • End Connection
   • Quantity
2. Materials
   • Body Material
   • Ball / Closure Material
   • Stem Material
   • Seat Material
   • Seal / Packing Requirement
3. Service Conditions
   • Process Fluid
   • Design Pressure
   • Operating Pressure
   • Design Temperature
   • Operating Temperature
   • Sour-Service Requirement
4. Seat / Isolation Requirement
   • Soft or Metal Seat
   • Seat Leakage Requirement
   • Self-Relieving / DPE Requirement
   • DBB / DIB Requirement, where applicable
5. Special Requirements
   • Fire Safe
   • Fugitive Emission
   • Anti-Static
   • Cryogenic
   • High Temperature
   • Buried Service
   • Piggable / Full-Bore Requirement
6. Operation
   • Lever
   • Gear
   • Pneumatic
   • Electric
   • Hydraulic / Specialist Actuation
7. For Actuated Packages
   • Fail Open / Fail Close / Fail in Place
   • Operating Time
   • Power / Instrument Air
   • Solenoid Requirement
   • Limit Switch
   • Positioner
   • Local Controls
8. Inspection & Documentation
   • FAT
   • TPI
   • MTC
   • ITP
   • Testing Requirement
   • Documentation / MRB
   • Approved Manufacturer List
   • Required Delivery Date

Where available, attach:

• Valve Datasheet
• Material Requisition
• RFQ
• P&ID
• Piping Class
• Project Specification

Example

Manual operated:

Ball Valve, 6" Class 600, Trunnion-Mounted, Full Bore, RF, Carbon Steel Body, SS316 Trim, Soft Seated, API 6D, Gear Operated, Fire-Safe Requirement, MTC 3.1 and API Testing Documentation Required.

Actuated example:

Ball Valve, 12" Class 900, Trunnion-Mounted, Full Bore, RTJ, material and seat arrangement as per datasheet, complete with Pneumatic Actuator, Fail Close, Solenoid Valve, Limit Switch and accessories, FAT/TPI and documentation as per project specification.

Examples only. Final description must follow the actual project datasheet and specification.

1. Review
   • We review the required valve specification, testing and documentation requirements.
2. Manufacturer Selection
   • Suitable valve options are identified through our manufacturer and supply network.
3. Technical Compliance
   • The proposed pipe is reviewed against the agreed technical and commercial scope.
4. Actuation, Inspection & Testing
   • Where required, actuator integration, FAT, TPI, pressure testing and project inspection requirements are coordinated.
5. Documentation & Delivery
   • Required documentation, final release and logistics are coordinated through completion of the supply package.

Avasi Energy is based in Kota Kinabalu, Sabah, supporting pipe and piping-material requirements for customers, projects and industrial operations in East Malaysia.

Our local presence is supported by access to manufacturers and supply partners in Malaysia and internationally, allowing us to coordinate requirements according to project specifications rather than restricting customers to a single source or product range.

This positioning is increasingly relevant as Sabah’s OGSE ecosystem develops. PETRONAS reported in February 2026 that contracts secured by recognised Sabah-based OGSE vendors had grown substantially since 2021.

We support requirements associated with:

• Oil & Gas
• Petrochemical & Process
• Energy
• Offshore & Onshore Projects
• Maintenance & Shutdowns
• Brownfield Modifications
• Replacement Requirements

Send Avasi Energy your valve datasheet, RFQ, material requisition, piping class or project specification.

Whether your requirement involves a floating ball valve, trunnion-mounted API valve, full-bore isolation valve, metal-seated valve or complete actuated package, our team will review the requirement and coordinate suitable sourcing options according to the specified technical, testing, documentation and delivery requirements.