Differential Pressure Two Valve Manifold

Differential Pressure Two Valve Manifold

The SIYelectric Differential Pressure Two Valve Manifold is designed for instrument isolation, bleeding, venting, and calibration in industrial differential pressure measurement systems.

It combines valve functions into one compact manifold body and is commonly used with differential pressure transmitters, pressure transmitters, pressure gauges, and other field instruments. By providing controlled blocking and bleeding functions, the manifold helps operators isolate the instrument from the process line, release trapped pressure, and carry out inspection or calibration more safely.

This manifold is suitable for applications involving differential pressure measurement, flow measurement, level measurement, filter monitoring, pressure control, and process instrumentation loops.

Applications

Oil & Gas Industry

Differential pressure and pressure monitoring
Used in drilling, production, pipeline transmission, gas processing, and refinery systems where instruments need stable pressure or differential pressure measurement.

Flow measurement support
Suitable for flow measurement loops using differential pressure transmitters with orifice plates, flow nozzles, venturi tubes, or other primary flow elements.

Isolation, venting, and draining
The differential pressure two valve manifold allows operators to isolate instruments, release trapped pressure, drain the line, and perform calibration or maintenance more safely in high-pressure service.

Chemical and Petrochemical Plants

Process pressure and differential pressure measurement
Applied in reactors, pumps, dosing systems, distillation columns, storage tanks, filters, and process pipelines where stable measurement and instrument isolation are required.

Safer maintenance in harsh media
The block and bleed functions help isolate field instruments from corrosive, toxic, flammable, high-pressure, or high-temperature process 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 pressure or differential pressure instruments require reliable isolation.

Instrument protection and calibration
The manifold helps protect transmitters and gauges during commissioning, shutdown, routine inspection, and calibration work.

Pharmaceutical and Biotechnology

Clean utility and auxiliary process lines
Suitable for auxiliary pressure or differential pressure measurement points in water systems, clean utility lines, filtration skids, fermentation equipment, and process systems.

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

Water Treatment and Distribution

Pressure and flow monitoring
Used in filtration units, pumping stations, treatment equipment, and distribution pipelines to support pressure measurement, differential pressure monitoring, and flow-related process control.

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

HVAC Systems

Heating and cooling system measurement
Applied in chilled water, heating water, refrigerant, and ventilation-related systems where pressure or differential pressure instruments require isolation and venting.

Differential pressure monitoring
Can be used for pump systems, filter sections, heat exchangers, and air or water flow monitoring where pressure difference needs to be measured or checked.

Laboratories and Research Facilities

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

Flexible instrument connection
The compact manifold body supports instrument connection, pressure release, calibration, and pressure line management in experimental or small-scale process systems.

Advantages

• Differential pressure instrument support for DP transmitters used in flow, level, filter, and process monitoring applications.
• Two valve manifold design provides reliable instrument isolation and controlled bleeding or venting.
• 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 longer service life.
• Precision-machined valve body helps ensure accurate dimensions, smooth operation, and consistent sealing performance.