Kofloc Model 2450 Bellows Needle Valve

The Kofloc Model 2450 Bellows Needle Valve is a premium fluid control instrument engineered for applications where leak-tight integrity and high purity are non-negotiable. By utilizing a bellows-sealed construction, this valve eliminates the risk of stem leakage and environmental contamination, making it superior to traditional packed-gland valves.

Specifically designed for high-vacuum systems and reactive gas handling, the Kofloc Model 2450 Bellows Needle Valve provides ultra-fine flow control while ensuring that your process remains completely isolated from the atmosphere.

Description

The Kofloc Model 2450 Bellows Needle Valve is the definitive solution for managing toxic, flammable, or high-purity gases. The core of its design is a high-grade metallic bellows that completely seals the internal fluid path from the stem and adjustment threads. This airtight barrier ensures that even under high vacuum conditions, no ambient air can seep into the system, and no hazardous gases can escape into the workspace.

Beyond its safety features, the Kofloc Model 2450 Bellows Needle Valve offers exceptional control precision. The non-rotating stem design prevents the needle from galling the seat, maintaining a high-precision flow profile over thousands of cycles. Its all-stainless steel construction and minimized dead volume make it easy to purge, which is critical for semiconductor manufacturing and advanced chemical research. When your process demands absolute purity and zero-leakage performance, the Model 2450 is the trusted industrial standard

Brand

Kofloc

Kofloc

The natural environment is preserved through the balance of solids, liquids and gases that exist on the earth. However, human civilization has caused pollution that has greatly damaged our environment. The task of the present generation is to restore our environment to its natural healthy state. And this is also the greatest challenge for 21st century science and technology.

KOFLOC's corporate motto is "A Scientific Approach for Fluids." In other words, we create products that scientifically measure and control the balance of liquids and gases. We trust that through our work we are making a contribution to the regeneration of the environment and to the establishment of a prosperous society.

Features

  • Bellows-sealed design for total isolation and zero-leakage performance.

  • Non-rotating stem mechanism to minimize wear and particle generation.

  • Ideal for high-vacuum and high-purity gas delivery systems.

  • Robust all-stainless steel construction for maximum durability.

  • Precision-engineered needle for ultra-fine, repeatable flow control.

  • Low dead volume design to facilitate efficient system purging.

Applications

  • Semiconductor Manufacturing: Precision control of process and cleaning gases.

    Vacuum Technology: Fine-tuning gas load and pressure in vacuum chambers.
  • Analytical Chemistry: Handling sensitive carrier gases and reactive reagents.

  • Specialty Gas Industry: Safe management of hazardous or high-cost gases.

  • Research & Development: High-purity gas distribution in laboratory pilot plants.

Specification

  • Model: 2450

  • Valve Type: Bellows-sealed Precision Needle Valve

  • Applicable Fluids: High-purity gases, toxic gases, flammable gases, and vacuum

  • Leak Integrity: Inboard leak rate less than $1 times 10^{-9}$ Pa·m³/s (He)

  • Maximum Operating Pressure: 1.0 MPa (Standard)

  • Vacuum Rating: High vacuum compatible

  • Operating Temperature: -10°C to 80°C (Standard configurations)

  • Connection Sizes: 1/4″ Tube fittings, Rc 1/4, or specified VCR/fittings

  • Wetted Materials: SUS316L, SUS316, and specialized bellows alloys