L Type Two Valve Manifold

L Type Two Valve Manifold

The SIYelectric L Type Two Valve Manifold Female-Female is designed for pressure instrument connection, isolation, bleeding, venting, and calibration in industrial process measurement systems.

With an L type body structure and female-female threaded connections, this manifold provides a compact and practical installation solution for pressure gauges, pressure transmitters, pressure switches, and other field instruments. It allows operators to isolate the instrument from the process line and release trapped pressure before calibration, inspection, or replacement.

This type of two valve manifold is widely used in pressure measurement, process monitoring, instrument protection, and maintenance isolation across oil & gas, chemical, power, water treatment, HVAC, laboratory, and general industrial applications.

Applications

Oil & Gas Industry

Pressure monitoring and control
Used in drilling, production, pipeline transmission, gas processing, and refinery systems where pressure instruments need reliable isolation from high-pressure liquids and gases.

Flow measurement support
Suitable for pressure measurement points related to flow monitoring in pipelines, refineries, and process units.

Isolation, venting, and draining
The L type two valve manifold allows operators to isolate the pressure instrument, release trapped pressure, drain the line, and carry out calibration or maintenance more safely in high-pressure service.

Chemical and Petrochemical Plants

Process pressure measurement
Applied in reactors, pumps, dosing systems, distillation columns, storage tanks, and chemical pipelines where stable pressure monitoring 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 media before inspection or calibration.

Power Generation

Steam and water systems
Used in boiler systems, turbine auxiliary systems, feedwater lines, condensate systems, and steam pipelines where pressure gauges or transmitters require stable isolation.

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

Pharmaceutical and Biotechnology

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

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

Water Treatment and Distribution

Pressure monitoring in water systems
Used in filtration units, pumping stations, treatment equipment, and distribution pipelines to support pressure measurement and process control.

Convenient instrument maintenance
The manifold allows pressure instruments to be isolated locally, making calibration, replacement, and troubleshooting easier without shutting down a large pipeline section.

HVAC Systems

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

Service isolation
Provides a convenient maintenance point for technicians, helping reduce downtime during inspection or instrument replacement.

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 monitoring and safe instrument isolation.

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

Advantages

• L type female-female connection design supports compact installation in pressure instrument lines.
• Two valve structure 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 use 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.