Definition of Two-Valve Manifold

The Two-Valve Manifold is used in conjunction with pressure transmitters or pressure gauges. Its function is to connect or disconnect the positive and negative pressure chambers of a differential pressure transmitter to/from the pressure tapping points, or to connect or disconnect the positive pressure chamber from the negative pressure chamber. It is generally used in on-site control instruments to provide multiple channels for the instrument, reduce installation workload, and improve system reliability. The Two-Valve Manifold is connected to the process interface of the transmitter, with common specifications of 1/2 NPT and 1/4 NPT. The inlet part has the same specification as the pipeline, with common technical parameters of φ12, φ14, φ16, and φ18.

Technical Parameters of Two-Valve Manifold

Working Pressure of Two-Valve Manifold

Stainless Steel: 414 bar (6000 psig)

Alloy C-276: 414 bar (6000 psig)

Alloy 400: 345 bar (5000 psig)

Working Temperature of Two-Valve Manifold

PTFE Packing: -54°C to 232°C (-65°F to 450°F)

Graphite Packing: -54°C to 649°C (-65°F to 1200°F)

Internal Diameter: 0.157 in. (4.0 mm), CV: 0.35

The grease on the upper valve stem thread is isolated from the system medium.

Non-rotating valve tip reduces galling between the valve seat and valve head.

The valve has a backseat function in the fully open position.

The handle is secured with screws at both ends for stability.

Factory pressure testing is conducted.

Each valve undergoes a leak tightness test using nitrogen at the working pressure.

Product Applications of Two-Valve Manifold

The Two-Valve Manifold is used in conjunction with differential pressure transmitters. Its function is to connect or disconnect the positive and negative pressure chambers of the differential pressure transmitter to/from the pressure tapping points, or to connect or disconnect the positive pressure chamber from the negative pressure chamber.

Three-Valve Manifold: The Three-Valve Manifold is used in conjunction with differential pressure transmitters and has a wide range of applications. It consists of three valves: a high-pressure valve, a low-pressure valve, and a balance valve. The high-pressure valve is connected to the positive pressure chamber of the differential pressure transmitter, and the low-pressure valve is connected to the negative pressure chamber of the differential pressure transmitter. Its function is to connect or disconnect the positive and negative pressure chambers of the differential pressure transmitter to/from the impulse pipes, or to connect or disconnect the positive pressure chamber from the negative pressure chamber. For the connection between the Three-Valve Manifold with a nominal pressure of 32 MPa and the impulse pipes, welding is recommended.