One-Piece Instrumentation Ball Valves

Product Details

• Product Name:One-Piece Instrumentation Ball Valves
• Materialof the Valve body: 316,304,321,316L,Copper,Alloy 400
• Design: ASME B31.1, ASME B31.3
• End Size: 1/16″ ,1/8″,1/4”,1/2”,3/4”,and 3 mm,6 mm,8mm，10mm,12mm,14mm,16mm,18mm

• Variousend connection Types:  Two ferrules fittings,NPT, BSPT,Metric Thread,BSPP, Fractional Tube Fitting,Metric Tube Fitting,Male VCO Fitting ,Male VCR Fitting
• Features:

• Working pressure up to: 3000 psig (207 bar)
• Working temperature: -65°F to 300°F (-54°C to 148°C)
• 2-, 3-, 4-, 5-, 6- and 7-way models for on-off, switching and crossover service available
• One-piece body and one-piece ball stem
• No dead space
• Top-loaded design to allow adjustment with the valve in-line
• Thermal cycle performance improved and wear compensated by live-loaded design
• Any reasonable connections available
• Pneumatic and electric actuator available
• Handle color options available
• Full operating pressure at any port
• The inlet can be any port except for valves with vent ports
• Leak-tight performance testing with nitrogen or compressed air for every valve at the rated pressure to meet the requirement of no visible leak

 

Application:

1. Analytical and Laboratory Systems

This is the most classic application area, demanding extremely high standards for valve cleanliness, response speed, and precise control.

Gas/Liquid Chromatographs: Used as injection valves or switching valves (using multi-port models such as 4L and 6C) to precisely control the flow direction of samples, carrier gases, or solvents, enabling the automation of complex analytical processes.

Online Analyzers: Installed on process pipelines to switch sample gases to different analyzers (e.g., using a 3L three-way valve) or to calibrate zero points and spans.

Laboratory Reactor Setups: Control the on/off and flow direction of reactants. Their “zero dead volume” design prevents cross-contamination.

 

2. Process Control and Instrument Protection

In industrial settings, these valves act as “precision switches” for instrument piping.

Instrument Root Valves/Isolation Valves: Installed upstream of instruments such as pressure/differential pressure transmitters and flow meters. They serve as the primary shut-off to protect expensive instruments and facilitate maintenance and calibration. This is the primary use for two-way (2-way) valves.

Multi-instrument Switching and Venting: Use three-way valves (3-way, 3HL) to connect one measurement point to multiple instruments or to safely divert media to a vent. The vented valve option mentioned in the manual is designed for this safe venting.

Differential Pressure Measurement: Specific three-way valve configurations connect the high and low sides of a differential pressure transmitter and provide positions for equalization and calibration.

 

3. Fluid Distribution and Complex Flow Path Switching

This series demonstrates its most powerful capabilities, suitable for systems requiring complex logic control.

Multi-stream Sampling Systems: For example, using a single 7-port valve allows sequential switching of 7 different process lines to a common analyzer, enabling multi-point (circuit monitoring).

Reactor or Reaction Sequence Control: Using multi-port valves like 4V or 5LV, different reagents can be introduced into a reactor in a programmed sequence, or product flow can be switched to different downstream processing units.

Calibration Gas Blending: Precisely controls the mixing ratio of multiple gas sources for creating standard gases or controlling reaction atmospheres.

 

4. Specific Industrial Scenario Applications

Their materials and design enable them to perform in demanding environments.

Oil & Gas and Chemical Industries: The corrosion-resistant 316 stainless steel body can be used in applications with corrosive media like hydrogen sulfide (the manual notes compliance with the NACE MR0175 standard). Multi-port valves are used for wellhead testing, catalyst injection, etc.

Semiconductor and High-Purity Processes: Valves subjected to special cleaning (meeting ASTM G93 Level C) are used in ultra-high-purity gas and chemical delivery systems to ensure contamination-free operation.

Power and Energy: Used in auxiliary systems like boiler feedwater and steam sampling lines that involve high pressure and temperature.

Skid-Mounted Equipment and Panel Integration: Offering panel mount and bottom screw mount options makes them ideal for integration into analyzer shelters, instrument panels, or packaged systems, saving space and ensuring a neat appearance.

 

Summary and Key Selection Points

Core Value: This valve is not merely a simple “switch”; it is a precision module capable of implementing complex fluidic logic control.