Stainless Steel Vacuum Globe Valves

Stainless Steel Vacuum Globe Valves is an indispensable core equipment for shut-off and regulation in vacuum systems. Its core working principle is to drive the disc up and down via the valve stem, realizing precise on-off control of the vacuum pipeline, fundamentally preventing external gas infiltration and ensuring stable system vacuum.

The valve is made of full stainless steel with an exclusive structure designed for the NKJ series vacuum valves. The sealing surfaces adopt hard alloy hardfacing technology, which can stably withstand alternating high and low temperatures, medium corrosion and pressure impact in vacuum environments. All production processes strictly comply with relevant technical standards for vacuum valves, making it suitable for various industrial and laboratory scenarios with strict vacuum requirements.

As a key supporting component of vacuum systems, the sealing performance and structural stability of the Stainless Steel Vacuum Globe Valves directly determine the operational efficiency and safety of the system.

Core Product Features

Excellent Sealing Performance

Adopts metal hard seal (hard alloy hardfacing) with special vacuum sealing packing. Vacuum leakage rate ≤ 1×10⁻¹⁰ Pa·m³/s, in compliance with JB/T 6446. Suitable for high vacuum (10⁻³ Pa) and ultra-high vacuum (10⁻⁷ Pa) conditions, eliminating gas leakage.

Durable Material Configuration

Core components including body, bonnet and stem are made of 304, 316 stainless steel and 17-4PH precipitation hardening stainless steel, conforming to GB/T 1220 and ASTM A182. Outstanding corrosion and wear resistance for long-term use in complex vacuum environments.

Strong Adaptability

Supports flanged connection (GB/T 6070 vacuum flange, GB/T 9113 standard flange) and welded connection (optional). Straight-through flow path reduces flow resistance. Outside screw structure allows direct observation of valve status for easy operation.

Multiple Actuation Options

Manual (handwheel with scale indication) or electric (multi-turn, explosion-proof Exd II BT4) actuation available. Electric type for remote control and high-frequency operation; manual type for small systems and low-frequency use.

Compliant & Reliable

Designed and manufactured in strict accordance with GB/T 12235, JB/T 6446 and other national and industrial standards. Passed shell pressure test, vacuum seal test and other inspections. Each valve meets safety requirements for vacuum systems.

Applications

With excellent vacuum sealing performance and material durability, Stainless Steel Vacuum Globe Valves is widely used in fields with strict vacuum requirements:

● Electronics & Semiconductor: Vacuum pipeline control in chip manufacturing and packaging, ensuring high vacuum and cleanliness.

● Photovoltaic Industry: Vacuum systems for coating and silicon wafer processing, improving conversion efficiency.

● Vacuum Coating: Optical and hardware coating equipment, maintaining stable vacuum for uniform coating.

● Vacuum Metallurgy: Vacuum melting and annealing, resisting temperature alternation and ensuring purity.

● Laboratory & Research: Various vacuum test devices, covering low, medium, high and ultra-high vacuum.

Core Technical Parameters

Design & Manufacturing Standards

Component Materials

Selection Guidelines

1.Vacuum Level: Ensure leakage rate ≤1×10⁻¹⁰ Pa·m³/s for ultra-high vacuum systems.

2.Material: 304 for general service; 316 for slightly corrosive media.

3.Connection: GB/T 6070 vacuum flange preferred; welding for special conditions.

4.Actuation: Manual for small/low-frequency systems; electric for remote/high-frequency use.

5.Temperature: Confirm temperature range covers working conditions; strengthen packing for frequent thermal cycling.

Operation & Maintenance

1.Pre-installation: Thoroughly clean interior and sealing surfaces to avoid contamination.

2.Installation: Use vacuum gaskets (copper, PTFE); tighten bolts diagonally.

3.Operation: Open/close slowly to avoid pressure shock.

4.Inspection: Monitor vacuum regularly; check stem movement and sealing surfaces.

5.Maintenance: Work only after venting to atmosphere; use only vacuum-grade packing.

6.Long-term Storage: Check for seizure and perform vacuum seal test before reuse.

As a core shut-off device for vacuum systems, the stability and tightness of this valve directly affect system efficiency and product quality. All valves are fully tested and can be customized to meet specific vacuum requirements.