Valves and Actuators
Global Leader in Valve Distribution and Engineered Actuation Solutions
MacLean Valves, a division of MacLean International and part of the DNOW group, delivers engineered valve and actuation solutions to industrial operations across Singapore and Southeast Asia including Malaysia, Thailand, Vietnam, Indonesia, Brunei and the Philippines. As a global supplier with local expertise we support maintenance, shutdowns and capital projects with a complete valve offering—from manual valves to actuated packages, engineered modifications, on-site servicing and certification testing.
Backed by decades of expertise and OEM-trained technicians MacLean Valves ensures timely access to certified high-performance products and services that meet the rigorous demands of oil & gas, petrochemical, power, mining, water and process industries across the region.
Our History of Industry-Leading Valve Solutions and Global Reach
With roots dating back to 1979 as Capital Valves MacLean Valves brings over four decades of expertise in delivering manual and actuated valve solutions to global industries. Today as part of MacLean International and DNOW we leverage a world-class supply chain and global inventory to support projects across Singapore, Southeast Asia and beyond.
Our proven history in project supply, engineered actuation and valve services continues to support critical operations in offshore oil & gas, LNG terminals, mining and infrastructure projects backed by DNOW’s expansive global distribution network.
Our Strengths - Local Expertise, Global Support
From our Singapore store we provide regional coverage across Southeast Asia ensuring fast access to the products and services needed to keep your operations running. Whether you’re planning shutdowns, field maintenance or large-scale construction our integrated approach delivers efficiency, accuracy and reliability.
Our strengths include:
- Global Network – supporting site construction and field operations across Singapore and Southeast Asia
- Established Supply Chain – audited and approved manufacturers of high-quality valves worldwide
- Comprehensive Stock – strategically positioned stock to meet urgent project timelines
- One-stop solution – project supply, distribution, actuation, modifications, repairs and on-site services
Comprehensive Valve Portfolio
We supply a complete range of manual and actuated valves engineered for durability, safety and performance in the region’s demanding industries:
Ball
Butterfly
Check
Choke
Control
Diaphragm
Double Block
and Bleed
Gate
Globe
Instrument
Manifold
Plug
Pressure Seal
Safety Relief
Precision and Reliable Services for Industrial Operations
At MacLean Valves we deliver precision-engineered valve and actuation services to support Southeast Asia’s industrial environments. Leveraging DNOW’s global network and our local Singapore facilities our engineers and technicians provide tailored solutions that meet the highest material specifications, compliance standards and international certifications.
Our services include:
Engineered Solutions
- Shutdown valves (SDV)
- Emergency shutdown valves (ESDV)
- Blow down valves (BDV)
- Turbine bypass valves
- HIPPS systems
- Subsea valves
Actuation Services
- Valve and actuator integration
- Actuator compatibility assessment
- Valve torque measurement
- Mounting adaptor design and manufacture
- Control panel design and manufacture
Technical Support
- Full engineered support
- OEM-trained engineers
- Criticality assessment
- Failure analysis
- Project management
Valve Testing
- Pressure testing
- NDE
- PMI
- Fugitive emission testing
- Cryogenic testing
Workshop Repair and Testing
- OEM-trained technicians
- Strip down and inspection
- Recommendation for repair/upgrade
- Pressure testing
- Machining, welding and modifications
On-site Services
- Site surveys
- Routine maintenance
- Commissioning
- Leak testing
- Control valve diagnostics
- On-site testing containers
Project Supply
- Project management
- Storage and warehousing
- Shut-downs
- Turn-key projects
- Consolidation of valves packages
Supplier Management
- Triple Impact Supplier Management Program
- Approved manufacturers list (AML)
- Audited supply chain
- QA/QC checkpoints
- ISO 2859
Valve Auditing and Testing
- PSV testing
- Control valve diagnostics
- PMI testing
- Failure analysis
- Valve recertification
- Hydrostatic and leakage testing to 10,000 psi and to multiple testing standards to: API 6D, API 598, API527, ISO5028, FCI70-2 as a sample
Multi Package Projects
MacLean Valves has the capacity to deliver multi-package projects covering a variety of product commodities. We streamline purchasing, documentation, expediting, invoicing and delivery—reducing administrative overheads while ensuring project efficiency. This allows our customers across Southeast Asia to focus on growth and critical operations while we manage the complexity of supply chains.
Valve Asset Management
Across Singapore and Southeast Asia we support industrial operators with complete valve lifecycle management through our Valve Management Software (VMS) platform. This digital tool empowers plants to:
- Optimize valve inventory
- Improve reliability
- Reduce downtime
- Maximize ROI on valve assets
We help customers manage their valve assets across total life cycle
