Overview
The Flowserve Worcester MK539 is a mounting bracket engineered for pneumatic valve actuator assembly and installation. Flowserve Worcester MK539 brackets are standardized components in the Worcester Controls MK series product line, designed to securely attach pneumatic actuators to ball valves and control valve bodies in industrial process applications. This bracket provides a precise interface between the valve stem and actuator mechanism, ensuring reliable mechanical coupling in on/off and modulating valve control systems.
Key Features
- Industry-standard MK-series bracket compatible with Worcester pneumatic actuator systems
- Precision-engineered for repeatable, secure valve-to-actuator coupling
- Designed for use with series ball valves and control valve configurations
- Factory-manufactured under Flowserve quality standards
- Compatible with multiple actuator sizes and valve body types
Technical Specifications
- Manufacturer: Flowserve Corporation (Worcester Controls)
- Part Number: MK539
- Product Type: Valve Actuator Mounting Bracket
- Series: Worcester Controls MK Series
- Application: Pneumatic valve control and on/off automation
- Material: Carbon steel or stainless steel (verify at order)
- Fastening: Cap screw and lockwasher assembly
- Mounting Method: Direct bracket-to-actuator and bracket-to-valve attachment
Typical Applications
- Ball valve actuator mounting in process control systems
- Pneumatic on/off and proportional valve automation
- Industrial steam, cryogenic, and utility system valve control
- Process automation in oil & gas, chemical, and pharmaceutical facilities
- Retrofit and replacement installations for existing valve actuator systems
- High-integrity and safety-critical valve actuation assemblies
Compatibility & Replacements
Compatible With
- Worcester Controls pneumatic actuators (Series 39, Series 34, and other MK-series compatible models)
- Flowserve Worcester ball valve bodies and control valve designs
- Standard 3-piece and full-port ball valve configurations
- ASME and DIN-flanged valve standards
- Pneumatic control systems operating at standard industrial air pressures (50–150 psi)
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator or contact Flowserve at 1-800-225-6989 before ordering, as MK-series brackets are application-specific. Direct cross-reference information should be confirmed with technical documentation for your actuator and valve models.
Works With
- Worcester Controls pneumatic actuator systems
- Flowserve integrated valve-actuator assemblies
- Standard industrial pneumatic control loops
- Field positioner and control valve accessories (with compatible mounting kits)












