The 1151 type three-valve manifold is an integrated instrument manifold specifically designed for use with 1151 series differential pressure transmitters, integrating two isolation valves (high pressure and low pressure) and one equalizing valve into one compact body. Featuring female threaded or flanged connections and precision internal flow paths, it enables connection or isolation between the transmitter’s high/low pressure chambers and the impulse lines, as well as equalization between the two chambers. This manifold is primarily used for differential pressure transmitter root isolation, online zero calibration, equalizing operations, and system venting. Its core purpose is to ensure that differential pressure, flow, or level measurement systems can safely and conveniently perform online zero calibration, draining/venting, and isolation maintenance of the transmitter without interrupting process operation, thereby guaranteeing continuous and stable operation of automated control systems.

Product Drawing of 1151 Type Three-Valve Manifold

1. Integrated compact design: Integrates high-pressure, low-pressure, and equalizing valves into one body, reducing leakage points and simplifying installation.

2. Specifically for 1151 transmitters: Fully matches the interface of 1151 series differential pressure transmitters for direct installation and strong compatibility.

3. Standardized operation for transmitter protection: Sequential operation of the three valves enables safe commissioning, zero calibration, and online isolation, preventing single overpressure damage.

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. Multiple connection options: Available with female thread (e.g., NPT 1/2”) or flange connections to suit various field conditions.

6. All-stainless steel construction: Body made of 304/316 stainless steel for excellent corrosion resistance in various industrial media.

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

Structure Diagram of 1151 Type Three-Valve Manifold

Component name and material

Performance Specification Sheet

1151 Type Three-Valve Manifold Outline Drawing

Outline dimension table