Overview
The Valtek 166667 OHP 11-99 is a pneumatic valve positioner designed for accurate and stable positioning of pneumatic actuators in process control systems. This dual-acting positioner operates on the force-balance principle, converting instrument signals (pneumatic or electro-pneumatic) into controlled air output to the actuator while continuously monitoring stem position through mechanical feedback. Ideal for applications requiring proportional valve control in chemical, petrochemical, power, and process industries.
Key Features
- Double-acting design capable of supplying and exhausting air to both sides of the actuator piston
- Force-balance positioning mechanism for stable, repeatable valve control
- Mechanical feedback system using stem follower and feedback spring
- Proportional air supply modulation based on instrument signal
- Compact, durable construction suitable for industrial process environments
- Compatible with standard pneumatic and electro-pneumatic control signals
Technical Specifications
- Manufacturer: Valtek International (Flowserve Corporation)
- Model Number: 166667 OHP 11-99
- Alternative Reference Number: 10121770
- Type: Pneumatic Valve Positioner
- Operating Principle: Force-balance (instrument signal vs. stem feedback)
- Actuation: Double-acting pneumatic
- Signal Input (Standard): 3–15 psi pneumatic or 4–20 mA electrical (I/P model)
- Supply Pressure: Consult manufacturer datasheet for exact specification
- Feedback Method: Mechanical stem follower with feedback spring
- Mounting: Standard valve flange configuration
- Series: OHP (Overpressure/High Performance)
Typical Applications
- Process control valve positioning in refineries and petrochemical facilities
- Pressure, flow, and temperature regulation in industrial systems
- Power plant and utility process automation
- Pulp and paper industry process control
- Chemical manufacturing valve actuation
- Proportional air supply modulation for dual-acting pneumatic cylinders
Compatibility & Replacements
Compatible With
- Pneumatic control systems with 3–15 psi signal input
- Electro-pneumatic systems with 4–20 mA input (I/P module versions)
- Double-acting pneumatic actuators and cylinders
- Standard control valve flanges and actuator stem configurations
- Legacy and modern process control systems from major automation suppliers
Replaces / Drop-In Replacement For
- Earlier Valtek OHP positioner revisions (verify part number compatibility with your system integrator)
- Verify compatibility with your system integrator or controls engineer before ordering to ensure mechanical and pneumatic fit with your actuator and valve body.
Works With
- Pneumatic control signals (P/P module)
- Electro-pneumatic control signals via I/P converter module
- Process controllers and DCS systems using 3–15 psi or 4–20 mA output
- Mechanical and electronic feedback instruments
- Standard industrial pneumatic supply equipment and manifolds
