Masoneilan 78-80H 08-80S 78-80S Pneumatic Transfer Valves
The Masoneilan 78-80H, 08-80S, and 78-80S Pneumatic Transfer Valves are industrial air control instruments designed for reliable pneumatic signal switching and actuator protection during instrument air supply failures.
- Three-Way Valve Configuration
- 1.72 MPa / 250 psi Maximum Body Pressure
- Cv 4.5 78-80H Flow Coefficient, IN to OUT
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- Technical supportTalk to an engineer
- 1 YearWarranty
Product Overview
The Masoneilan 78-80H, 08-80S, and 78-80S Pneumatic Transfer Valves are industrial air control instruments designed for reliable pneumatic signal switching and actuator protection during instrument air supply failures. Manufactured by Masoneilan, a Baker Hughes brand, the 78-80 Series provides three-way pneumatic transfer functionality to redirect compressed air when signal pressure falls below a preset threshold. These valves can also support air-failure-lock operation, maintaining the existing control valve position by retaining pneumatic pressure within the actuator.
The 78-80H is a high-capacity transfer valve featuring an integrated pressure-sensing pilot mechanism, while the 78-80S provides standard-capacity pneumatic transfer functionality. The series features adjustable pressure settings, durable industrial construction, and pneumatic switching technology for process control applications. These valves are suitable for oil and gas processing, chemical manufacturing, petroleum refining, power generation, water treatment, and industrial valve automation.
Technical Specifications
|
Specification |
Value |
|---|---|
|
Product Name |
Pneumatic Transfer and Air Lock Up Valves |
|
Manufacturer / Brand |
Masoneilan / Baker Hughes |
|
Model Numbers |
78-80H, 08-80S, 78-80S |
|
Product Series |
78-80 / 08-80 |
|
Product Type |
Pneumatic Three-Way Transfer Valve |
|
Primary Function |
Pneumatic Air Transfer and Actuator Lockup |
|
Operating Technology |
Pneumatic Pressure-Operated Switching |
|
Valve Configuration |
Three-Way |
|
Operating Medium |
Compressed Instrument Air |
|
Maximum Body Pressure |
1.72 MPa / 250 psi |
|
Maximum Signal Pressure |
1.03 MPa / 150 psi |
|
Pressure Setting Range |
100–700 kPa, Pilot-Operated 78-80H |
|
Pressure Setting Adjustment |
Adjustable, Pilot-Operated Models |
|
High-Capacity Model |
78-80H |
|
Standard-Capacity Model |
78-80S |
|
78-80H Flow Coefficient, IN to OUT |
Cv 4.5 |
|
78-80H Flow Coefficient, OUT to EXH |
Cv 5.0 |
|
78-80S Flow Coefficient, IN to OUT |
Cv 0.8 |
|
78-80S Flow Coefficient, OUT to EXH |
Cv 1.3 |
|
Additional Listed Model |
08-80S, Exact Configuration Requires Verification |
|
High-Capacity Port Connections |
Rc1/2 Standard, NPT 1/2 Optional |
|
Pilot Signal Connection |
Rc1/4 Standard, NPT 1/4 Optional |
|
Standard Operating Temperature |
−30°C to +83°C |
|
Optional Temperature Configuration |
0°C to +100°C, Selected Models |
|
Standard Housing Material |
Aluminium Alloy |
|
Optional Housing Material |
316L Stainless Steel, Selected Models |
|
Pilot Valve Technology |
Floating Ball Type, 78-80H |
|
Air Failure Function |
Pneumatic Signal Transfer |
|
Lockup Configuration |
Exhaust Port Plugged |
|
Actuator Compatibility |
Compatible Pneumatic Valve Actuators |
|
Installation |
Inline Pneumatic Instrumentation |
|
Operating Application |
Industrial Pneumatic Valve Control |
|
Condition |
New |
|
Warranty |
1 Year |
Key Features
Three-way pneumatic air transfer functionality
Automatic air switching during instrument pressure failure
Pneumatic actuator lockup capability
High-capacity 78-80H configuration for increased airflow
Standard-capacity 78-80S configuration for pneumatic control
Adjustable pressure settings on pilot-operated models
Reliable pressure-sensitive pneumatic switching
Integrated floating ball pilot valve on the 78-80H
Maximum body pressure rating of 250 psi
Maximum pneumatic signal pressure of 150 psi
Durable aluminium alloy industrial construction
Optional stainless steel construction for selected configurations
Compatible with industrial pneumatic valve actuators
Supports actuator position retention during air supply failure
Suitable for industrial valve maintenance and replacement
Typical Applications
Industrial pneumatic control valve systems
Pneumatic actuator air failure protection
Emergency pneumatic signal transfer systems
Industrial valve air lockup applications
Oil and gas production and processing facilities
Chemical and petrochemical manufacturing plants
Petroleum refining installations
Power generation and utility systems
Water and wastewater treatment facilities
Industrial pressure and flow control systems
Pneumatic control valve safety arrangements
Process automation and instrumentation systems
Industrial valve maintenance and replacement
Shipping & Support
Fast dispatch – Australia & Worldwide Shipping
Technical assistance available
1-year warranty
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