91362-4

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91362-4, also known as pressure-independent control valves, are automated valves that are used to control the rate of flow in a variety of applications such as plumbing, HVAC, hydraulic systems and process control. The purpose of the valve is to provide flow control at a fixed set point or linear response regardless of upstream or downstream pressure changes. Depending on application, 91362-4 valves are available in various sizes and configurations.

To understand the purpose and operation of the 91362-4, it is important to understand the basics of pressure-independent control valves. Pressure-independent valves are designed to control the flow rate through a system based on a pre-defined set point regardless of pressures upstream and downstream of the valve. This allows it to deliver consistent and precise flow control no matter the conditions, and helps to eliminate costly and inefficient hunting or cycling of the control valve when pressures vary within the system.

This is achieved by eliminating the dependency on the pressure differential by incorporating internal pilot pressure control. This pilot valve is regulated by a pilot pressure regulator, which has a sensitivity adjustable to accommodate a range of required flow rates. By adjusting the pilot pressure regulator, the flow rate through the 91362-4 is accurately and precisely maintained without the need for any external pressure dependent devices.

The 91362-4 valve is typically located downstream of a pressure-dependent valve, which is used to control the inlet pressure to the 91362-4 valve. This allows the pressure-dependent valve to keep the inlet pressure above a specific value while the downstream 91362-4 regulates the flow rate. By combining both valves, the inlet pressure is stable and steady while the flow rate is finely tuned and adjusted by the 91362-4 valve.

In summary, 91362-4 valves are automated control valves that are designed to control flow rates independent of pressure changes upstream and downstream of the valve. This is achieved by incorporating a pilot valve and pressure regulator, thereby eliminating the dependency on external pressure devices. The 91362-4 valve is typically used in tandem with a pressure-dependent valve, allowing the inlet pressure to remain above a set point while the 91362-4 regulates the flow rate.

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