Kofloc Model 2450 Bellows Needle Valve

Kofloc Model 2450 Bellows Needle Valve: This bellows seal type needle valve has been specifically developed so that it can satisfy the requirements for such areas in which leak is a concern of vital importance.
Model 2450 Bellows Needle Valve has a construction to drastically prevent fluid leaks. In addition, it is outstanding in heat resistance and corrosion resistance, so the customer can use it with peace of mind not only in such adverse conditions where high vacuum, high pressure, high temperature, or extremely low temperature is present but also for corrosive, toxic, or costly fluids.

KOFLOC strives for thorough quality control at domestic factories.
In recent years, we have also been focusing on product development for liquid measurement and control equipment, and we will deliver products that can be trusted as “Fluid Kofloc” to the world.

Features

Stringent leak test (2 x 10-8 Pam3/sec)
A 100% leak test is conducted before shipping, using a helium leak detector.
Use of a precision needle
The incorporated non-rotary type needle provides precise, smooth control of minute flows.
Compatible with both gases and liquids
Superior temperature characteristic
Flows are scarcely affected by ambient temperature fluctuations, remaining within an insignificant range of flow variations.
This superior temperature characteristic is applicable to gases only, and not to liquids, because the viscosity of a liquid may greatly vary depending upon the temperature conditions.

Applications

For vacuum systems
For semiconductor manufacturing lines
For production lines where toxic or corrosive gases are present

Specifications

Rated flow ranges	See the table below
Number of turns of regulating screw	Approx. 13–16 turns (Effective number of　turns: 5–16)
Maximum operating pressure	1 MPa
Maximum operating temperature	120℃
Fluids	Gas and liquid
Materials of parts in contact with fluids	SUS316, fluorocarbon resin, FKM
Connection end	1/4 swagelok (for joint) * Optional: 1/8SW