High-Purity Gas Valves Designed Around Your Process Requirements

In semiconductor gas delivery systems, a valve must do more than open and close. Its internal geometry, sealing interface, wetted materials, and surface condition can all affect system cleanliness, leakage control, and maintenance requirements.

Our semiconductor valve range includes diaphragm valves, bellows valves, angle valves, and ball valves for different gas control and isolation applications. Product selection can be tailored to the pressure range, required flow capacity, connection configuration, and installation space of your system.

• Valve configurations for high-purity and ultra-high-purity gas delivery.
• Metal diaphragm sealing structures on applicable valve series.
• 316L and VIM+VAR 316L body material options on applicable models.
• EP-treated internal surfaces on designated products.
• Connection and configuration options to suit system integration requirements.

Instead of selecting a valve by nominal size alone, define the process conditions first. This helps reduce the risk of mismatched connections, unsuitable wetted materials, insufficient flow capacity, or unnecessary installation changes.

Semiconductor Valve Types for Different Gas System Functions

Choosing the correct valve structure starts with understanding what the component must do within the gas delivery system. A shutoff valve, a high-pressure isolation valve, and a valve used for frequent process switching may require different designs.

High-Purity Diaphragm Valves

Diaphragm valves are used in high-purity gas systems where controlled shutoff and sealing performance are important. Applicable designs feature diaphragm-based sealing and can be specified for selected semiconductor process gases, including certain toxic or corrosive gases, subject to model and material compatibility.

Bellows-Sealed Valves

Bellows valves can be considered for isolation and vacuum-related applications where reducing the potential for leakage through the stem area is important. The appropriate design depends on the required pressure range, operating conditions, and sealing requirements.

High-Purity Ball Valves and Angle Valves

Ball valves provide quarter-turn operation for suitable shutoff applications. Angle valves are available for selected vacuum and gas isolation configurations. The valve type should be matched to the required flow path, actuation method, installation geometry, and process conditions.

Control Contamination Risks Through Material and Surface Engineering

In high-purity gas systems, material selection and internal surface quality directly affect how well a valve fits the process environment. An unsuitable wetted material or poorly controlled internal finish can increase contamination concerns, while incompatible seals may compromise long-term service performance.

Our product range incorporates high-purity stainless steel materials and controlled internal surface treatment for applicable semiconductor-grade valves. Selected products use 316L stainless steel produced through vacuum induction melting and vacuum arc remelting (VIM+VAR), together with electropolishing (EP) and subsequent passivation processes.

• Wetted-material selection: Stainless steel body options and designated internal component materials, depending on the valve series.
• Internal surface treatment: EP processing on applicable products to improve surface smoothness and support corrosion resistance.
• Sealing configuration: Metal diaphragm structures and specified sealing materials on applicable models.
• Cleanliness management: Precision cleaning, assembly, testing, and protective packaging for designated high-purity products.

Material compatibility must always be evaluated against the actual process gas or chemical, operating temperature, pressure, and required service life. A 316L body alone does not establish compatibility with every specialty gas.

1. What is the difference between a high-purity valve and a standard industrial valve?

A high-purity valve is selected with additional attention to wetted-material quality, internal surface condition, sealing performance, cleanliness, and packaging. The required controls depend on the process application and the specified cleanliness level.

2. Are 316L stainless steel valves suitable for every semiconductor process gas?

No. Compatibility depends on the complete wetted-material configuration, including the diaphragm, valve needle, seals, and other internal components. The actual gas, concentration, pressure, temperature, and operating conditions must be reviewed before selection.

3. What is the purpose of electropolishing in high-purity valve applications?

Electropolishing improves the smoothness of treated metal surfaces and can support corrosion resistance by modifying the surface condition. The achieved roughness and cleanliness must be confirmed against the specification for the selected product.

4. Can you provide valves for gas cabinets and valve manifold systems?

Yes. The product range includes valve options for gas cabinets, VMB, VMP, and other gas delivery configurations. Please provide the system drawing, process conditions, connection requirements, and intended valve function so that the appropriate series can be reviewed.

5. What information is required for a custom valve quotation?

Provide the required valve type, process medium, pressure and temperature ranges, flow requirements, connection details, material specifications, quantity, and inspection requirements. Drawings or an existing part number are helpful when available.

6. Can you provide helium leak test results?

Helium mass spectrometer leak testing is specified for applicable valve series. The test method, acceptance limit, and available inspection records should be confirmed for the selected model and purchase requirements.