Valve Closing Mode
The valve closes when the pilot system directs the line pressure into the control chamber (the area above the diaphragm). This pressure, combined with the spring force, creates a downward force greater than the upward force of the line pressure. The resulting net force pushes the diaphragm downward, closing and sealing the valve.
Valve Opening Mode
To open the valve, the pilot system vents the control chamber, releasing the pressure on the diaphragm. When the closing pressure is released, the upstream line pressure creates an upward force greater than the downward force of the spring. By applying force, it lifts the diaphragm and fully opens the valve.
Modulation
Modulation occurs by holding the valve in a partially open position to regulate pressure or flow. The pilot system accomplishes this by continuously adjusting the pressure in the control chamber. By balancing the upstream line pressure against the combined downstream forces of the reservoir pressure and the spring, the diaphragm remains in an intermediate position, allowing the valve to maintain the desired downstream pressure or flow rate.
Advantages
Autonomous, Power-Free Operation: Operates solely on the hydraulic pressure of the line; requires no external electrical or pneumatic supply.
This simplifies installation, minimizes operating costs, and ensures uninterrupted functionality even during power outages.
Versatile Multifunctional Control: Performing multiple functions such as on/off control, pressure reduction, and flow modulation in a single compact unit offers exceptional flexibility in system design.
Stable Outlet Pressure: The precise pilot system protects outlet components by maintaining a constant, desired outlet pressure regardless of fluctuations in inlet pressure or flow rate. Robust Cast Housing Construction: High pressure It is manufactured from heavy-duty cast materials for long-lasting performance and reliability in demanding operating conditions. Internal Safety Features: Automatically shuts off when there is no line pressure, prevents potential damage from dry running conditions and protects pumps and connected systems.
