Coplanar Three Valve Manifold

Coplanar Three Valve Manifold

The SIYelectric Coplanar Three Valve Manifold is designed for direct mounting with coplanar differential pressure transmitters and other industrial pressure measurement instruments.

It integrates two block valves and one equalizing valve into a compact manifold body. The two block valves isolate the high-pressure and low-pressure sides from the process, while the equalizing valve allows pressure balancing between both sides of the transmitter during zero checking, commissioning, calibration, or maintenance.

This type of three valve manifold is widely used in differential pressure measurement, flow measurement, level measurement, filter monitoring, and process control systems. It helps improve installation safety, reduce piping complexity, and protect the transmitter from improper pressure loading during operation or maintenance.

Applications

Oil & Gas Industry

Differential pressure measurement
Used in drilling, production, pipeline transmission, gas processing, and refinery systems where differential pressure transmitters are applied for flow, level, or pressure monitoring.

Flow measurement support
Suitable for DP flow measurement loops with orifice plates, flow nozzles, venturi tubes, and other primary flow elements in pipelines and process units.

Isolation and equalizing
The coplanar three valve manifold allows operators to isolate the high-pressure and low-pressure sides, equalize pressure across the transmitter, and carry out zero checks or calibration more safely.

Chemical and Petrochemical Plants

Process differential pressure control
Applied in reactors, pumps, filters, distillation columns, storage tanks, and chemical pipelines where stable differential pressure measurement is required.

Safer maintenance in harsh media
The manifold helps isolate DP transmitters from corrosive, toxic, flammable, high-pressure, or high-temperature media before inspection, replacement, or calibration.

Power Generation

Steam and water systems
Used in boiler systems, turbine auxiliary systems, feedwater lines, condensate systems, and steam pipelines where DP transmitters are used for flow, level, or pressure difference monitoring.

Instrument protection and calibration
The three valve structure helps protect the transmitter during commissioning, shutdown, zero adjustment, and routine calibration.

Pharmaceutical and Biotechnology

Clean utility and auxiliary process lines
Suitable for auxiliary DP measurement in water systems, clean utility lines, filtration skids, fermentation equipment, and process systems.

Clean process isolation
For hygienic or sanitary applications, material selection, connection type, sealing structure, and surface requirements should be confirmed according to the actual medium and cleaning conditions.

Water Treatment and Distribution

Flow and differential pressure monitoring
Used in filtration systems, pumping stations, treatment equipment, membrane systems, and distribution pipelines to support stable process measurement.

Filter pressure drop measurement
Suitable for monitoring differential pressure across filters, membranes, and treatment units, helping operators identify clogging, fouling, or maintenance needs.

HVAC Systems

Differential pressure measurement
Applied in chilled water, heating water, air handling units, filter sections, pump systems, and heat exchangers where pressure difference needs to be measured or monitored.

Maintenance isolation
The manifold allows technicians to isolate and equalize the transmitter locally, improving maintenance convenience in complex HVAC systems.

Laboratories and Research Facilities

Controlled DP measurement lines
Used in laboratories, test benches, pilot plants, and research systems where gases or liquids require stable differential pressure measurement.

Flexible instrument connection
The compact coplanar body supports DP transmitter mounting, equalizing, isolation, calibration, and pressure line management in experimental or small-scale process systems.

Advantages

• Coplanar three valve design supports direct mounting with coplanar differential pressure transmitters.
• Two block valves plus one equalizing valve allow safe isolation and pressure balancing across the transmitter.
• Suitable for flow, level, filter, and differential pressure monitoring in process instrumentation loops.
• Non-rotating stem design helps reduce seat wear and supports longer valve service life.
• Improved locking gland structure helps maintain stable stem operation and reliable sealing.
• 100% pneumatic pressure testing before shipment helps verify sealing performance.
• Tested at 1.5 times the design pressure to support reliable operation in demanding industrial applications.
• Hastelloy tip available as standard configuration for improved corrosion resistance and extended service life.
• Precision-machined valve body helps ensure accurate dimensions, smooth operation, and consistent sealing performance.