5
8
DQC414
877.963.4966 •
dixonvalve.com
SCV-Series Pneumatic Couplings
Interchange Data:
•
Hansen FS-Series
Materials:
•
Machined components are manufactured using solid brass
bar stock.
•
Stainless steel springs and roll-pins maximize corrosion
resistance and extend service life.
•
Nitrile (Buna-N) seals are standard, providing a temperature
range of -40°F to +250°F (-40°C to +121°C).
Seal Components:
•
Does not prevent backflow
•
High flow design results in maximum flow with minimal
pressure drop.
•
Automatically and instantly protects the operator against
hose whip in the event of a damaged hose or coupling.
•
In the event of a hose rupture or coupling failure, the valve
will automatically reset after the problem is fixed.
•
SCV-Series is available in a large selection of sizes ranging
from ¼" to 3", NPTF (BSPP/BSPT threads on request).
•
Valve operation is fully compliant with OSHA Safety
Regulation 1926.302(b)(7), as shown on page 3.
Features:
Performance
Specifications
0
a[imum Operating
Pressure - Bar (PSI)
Minimum Burst
Pressure - Bar (PSI)
Air Flow
30.5
m (100')
1/4"
17 (250)
138 (2,000)
17
SCFM
3/8"
17 (250)
138 (2,000)
41
SCFM
1/2"
17 (250)
138 (2,000)
77
SCFM
3/4"
17 (250)
138 (2,000)
178
SCFM
1"
17 (250)
138 (2,000)
340
SCFM
1-1/4"
17 (250)
138 (2,000)
620
SCFM
1-1/2"
17 (250)
138 (2,000)
940
SCFM
2"
17 (250)
138 (2,000)
1,760
SCFM
2-1/2"
17 (250)
138 (1,500)
2,800
SCFM
3"
17 (250)
138 (1,200)
4,200
SCFM
*
Air flow rating is based upon calculated values using unobstructed air flow for the applicable hose size.
Technical Specifications:
Use:
•
Safety check valves operate by using the pressure differential across the valve to operate the valve and spring assembly. The
pressure differential is directly related to the flow of air (SCFM) through the valve.
•
When the pressure differential is within the operating limits - below the cutoff flow - of the unit, the force on the valve exerted
by the spring is greater than that caused by the pressure differential (see "Open Position" graphic on next page). The valve
remains open and normal operation continues.
•
When the pressure differential is above the cutoff limit, the force on the valve exerted by the pressure differential is greater
than the force exerted by the spring, and the valve closes (see the "Closed Position" graphic graphic on next page).
•
After the repair is made, normal operation is automatically enabled when pressure across the valve equalizes through the
bleeder hole.
•
The valve spring size can be specified by determining the air flow during normal operation and by estimating the air flow if a
failure or rupture occurs.
Not recommended for applications requiring 100% of the available air supply. These applications include, but are
not limited to, sand blast equipment, pile driving rigs, and expansion joint blow down pipes. It is recommended to
install auxilliary safety devices, including Safety Cables, to ensure optimum safety for the operator in the event of a
coupling failure or hose rupture.