PTFE needle-valves regulate corrosives
An
Aalborg product story
Edited by the Engineeringtalk editorial team
May 18, 2009
Aalborg has released compact and reliable PTFE needle-valves for laboratory and industrial applications.
These valves regulate corrosive gases and liquids and provide high purity service.
They can also be used as shut-off valves.
The valves' pliant PTFE bodies are reinforced by structurally rigid metallic shells.
Fluids contact only PTFE and CTFE materials.
The shells are made of anodised aluminium or type 316 stainless steel; bushings are made of plated brass or 316 stainless steel.
Where externally corrosive conditions exist, stainless steel is recommended.
The valve spindles are made of rigid CTFE to minimise the undesirable material-creeping normally associated with PTFE.
PTFE valves are designed for relatively high-flow ranges but still perform well in low flow-rates.
Valves can be used in pressure or non-critical vacuum service.
The simplicity of design - there are only seven components (including a single PTFE O-ring) - assures reliability and minimises sources of leakage.
It takes seconds to disassemble the valve for cleaning and maintenance.
The PTFE O-ring is radially compressed, which allows the degree of compression to be adjusted without disassembly, by tightening the hexagonal bushing.
Its maximum operating pressure is 75psig (517kPa), maximum operating temperature is 150F (65C) and orifice size is 0.125in diameter (3.175mm).
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