Accu-Flow Series 87, a Globe type, Double ported, Top & Bottom Guided, Single Spring and Diaphragm actuated, Throttling/On-Off Type, Pneumatic Control Valve.The valve is double-seated, semi-balanced offering. It is still commonly used in refineries in applications such as crude or bottoms service.
Size Range: 15mm to 500mm
Pressure Rating: up to Class 600
- Top & Bottom Guiding
It extends range of application by eliminating the side thrust effect of pressure drops across the plug
- High Flow Capacity
It is achieved with low pressure recovery as mention by its high critical values
- Double Port Construction
It permits control of higher differential pressure and increase capacity of the valve with standard actuators
Construction FeaturesThe 87 Series double Ported has two seating surfaces and utilizes the pressure to assist the opening and closing of the valve. It uses post guiding at both the top and the bottom,therefore, it is a very rugged and stable design that performs well in high pressure applications.
Feature & BenefitsThe double ported design has full area and reduced capacity trims both V-ported and contoured symmetric configurations.
The valve has high pressure recovery factors and provides high capacities.
Not only is the design top entry, which provides easy access to the valve internals, it also has a bottom flange entry which allows the valve to be field reversible from air-to-open to air-to-close.
- Balance Design
Dynamic force on the plug tends to be balance as flow tends to open one port and close the other
- Reduced Dynamic Forces
acting on a plug might permit to choose a smaller actuator than would be necessary for a single ported valve body with similar capacity
- Top and Bottom Guiding
tolerates incidental contamination and solids
- Double Ported Valve Body
normally have higher capacity than single ported valves of the same line size and have an option to insert the plug in either direction
- Port Guided Valve Plugs
are widely used for on-off or throttling service. Top & Bottom guided valve plugs furnish stable operation for service conditions
- Field Reversible
for fail open or closed
- Threaded Seats
handle thermal shock and transients well
- The Accu-Flow series 87 valves can be used as throttling or on-off services
- Air to Open OR Air to Close valve action can be obtained by either reversing body and trims or reversing the actuator
- Valve body/trims and actuators are field reversible without additional parts