The QF-05 instrument equalizing valve is an instrument valve specifically designed for use with differential pressure transmitters. Through its independent equalizing valve structure, it enables rapid connection and isolation between the high and low pressure chambers of the transmitter. This valve typically features female threaded connections (e.g., NPT 1/2” or M20×1.5) and can be used in conjunction with isolation valves on impulse lines. This valve is primarily used for online zero calibration and equalizing operations of differential pressure transmitters. Its core purpose is to quickly equalize the pressure between the two chambers without interrupting process operation, facilitating transmitter zero calibration and ensuring the accuracy and continuous stable operation of differential pressure, flow, or level measurement systems.

Product Drawing of QF-05 Type Instrument Balancing Valve

1. Independent equalizing structure: Single-body design dedicated to connecting or isolating the transmitter‘s high/low pressure chambers for direct and clear operation.

2. Easy operation for instrument protection: Opening the equalizing valve quickly balances the pressure difference between chambers, preventing single overpressure damage and facilitating zero calibration.

3. Flexible connections: Standard female threads on both ends allow direct connection to isolation valves or transmitters for easy installation.

4. Metal-to-metal hard seal for reliability: Tapered or spherical hard seal between disc and seat ensures wear resistance and long cycle life.

5. All-stainless steel construction: Body made of high-quality stainless steel (304/316) for excellent corrosion resistance.

6. High pressure capability and wide temperature range: Nominal pressure up to PN16-PN40, temperature range from -70℃ to 570℃, suitable for medium to high pressure and complex applications.

Structure Diagram of QF-05 Type Instrument Balancing Valve

Component name and material

Performance Specification Sheet

QF-05 Type Instrument Balancing Valve Outline Drawing

Outline dimension table