PTFE Needle Valve

VT PTFE needle valves
These compact and reliable PTFE needle valves are designed for laboratory and industrial applications for regulating corrosive gases and liquids or for high purity service. They may also be used as shut off valves. Pliant PTFE bodies of the valves are reinforced by structurally rigid metallic shells. Fluids contact only PTFE and CTFE materials. Shells are made of anodized aluminum or type 316 stainless steel and bushings are made of plated brass or 316 stainless steel. Where externally corrosive conditions exist stainless steel is recommended.

Valve spindles are made of rigid CTFE to minimize the undesirable material “creeping” normally associated with PTFE. PTFE valves are designed for relatively high flow ranges while still performing well in low flow rates. Valves may 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 minimizes sources of leakage. It takes seconds to disassemble the valve for cleaning and maintenance. The PTFE O-ring is radially compressed and due to this unique design feature the degree of compression may be adjusted without disassembly by tightening the hexagonal bushing.

SPECIFICATIONS:

MAXIMUM OPERATING PRESSURE 75 psig (517 kPa)
MAXIMUM OPERATING TEMPERATURE 150°F (65°C)
MATERIALS OF CONSTRUCTION
FLUID CONTACTING MATERIALS PTFE (body and o-ring); CTFE (valve spindle)
NON-FLUID CONTACTING MATERIALS shell - aluminum (black anodized) or 316 stainless steel; bushing plated brass or 316 stainless steel; adjusting knob - phenolic.
ORIFICE SIZE 0.125 inch diameter (3.175 mm)

MODEL NUMBER CONNECTIONS

NON WETTED MATERIALS

  SHELL  /   BUSHING 

MAXIMUM FLOW (ML/MIN)

AIR       WATER

CV
VCLTTOA
1/8"FNPT ALUMINUM  /  BRASS 2400                  130 0.011
VCHTTOA
1/8"FNPT ALUMINUM  /  BRASS 55000                  2800 0.250
VCLTTOF
1/4"COMP ALUMINUM  /  BRASS 2400                  130 0.011
VCHTTOF
1/4"COMP ALUMINUM  /  BRASS 55000                 2800 0.250
VCLTTOG
GLASS NIPPLES
ALUMINUM  /  BRASS 2400                  130 0.011
VCHTTOG GLASS NIPPLES ALUMINUM  /  BRASS 55000                 2800 0.250
VCLTT2A 1/8"FNPT STAINLESS  / STAINLESS
2400                  130 0.011
VCHTT2A 1/8"FNPT STAINLESS  / STAINLESS 55000                2800 0.250
VCLTT2F 1/4"COMP STAINLESS  / STAINLESS 2400                 130 0.011
VCHTT2F 1/4"COMP STAINLESS  / STAINLESS 55000               2800 0.250
VCLTT2G GLASS NIPPLES STAINLESS  / STAINLESS 2400               130 0.011
VCHTT2G GLASS NIPPLES STAINLESS  / STAINLESS  55000              2800 0.250

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