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The company reserves the right to vary models and dimensions without notice.
These products are designed for industrial applications and are not suitable for sale to the general public.
AUTOMATIC VALVES NPTF
Automatic Valves NPTF
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NORTH AMERICAN FITTINGS & FLOW CONTROL VALVE CATALOG
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Release 8.6
Nickel-Plated Brass Quick-Exhaust & Check Valves
NPTF/Inch Series VNR, VSO, VSC
Check Valves: VNR
Quick-Exhaust Valves: VSO - VSC
Thread Type: 10-32 UNF, 1/8”, 1/4”, 3/8”, 1/2”, 3/4” NPTF
Automatic valves are defined as those
valves which change their state simply
as a result of compressed air being
present or absent at their inlets.
The unidirectional valves Series VNR
allow operation at low pressures both
when there is a free flow and during
retention.
Quick exhaust valves Series VSC and
VSO are commonly used to increase
the speed of cylinders or for rapid
depressurization of tanks containing
compressed air.
»»
Series VNR: low
operating pressures
»»
Series VSC - VSO:
able to increase the
speed of cylinders
»»
Series VSC - VSO:
depressurization of tanks
containing compressed air
GENERAL DATA
Valve group
automatic valves
Construction
Series VNR, Series VSO and Series VSC: poppet-type
Materials
Series VNR: Nickel-plated brass body - NBR Nickel-plated seals - stainless steel spring
Series VSO: Nickel-plated brass body - NBR (Buna-N) seals
Series VSC: Nickel-plated brass body - Desmopan seal (polyurethane)
Mounting
in any position
Ports
according to the different models (see tables)
Operating temperature Series VNR, Series VSO and Series VSC: 0°C - 80°C (with dry air -20°C) (32° - 175° F, dry air necessary down to -4° F)
Fluid
filtered air, without lubrication. If lubricated air is used, it is recommended to use ISO VG32 oil. Once applied the lubrication should
never be interrupted.