系统组件 拉断阀
SYSTEM COMPONENTS
Safety Breakaway Devices
SZ Series (Cable Release)
Breakaway Coupling
Areas of application
The SZ Series Emergency Breakaway Coupling
with cable control is designed to protect against
unintended pull-aways of tank trucks, railcars, barges or
ships. Loading arms and hose lines, conveying gases or
liquid media, can be either newly equipped or retrofitted
with the SZ Series.
Structure
Two non-return valves prevent product loss in case of
emergency separation. Both coupler halves are held
together with segments and a slide ring. A cable pull
triggers the separation by flipping the levers out of
their locked position. The NTS® also is available with the
proactive remote or hand separation.
Function
In a pull-off, the tensile force
travels along the cable, leaving
the hose or loading arm
tension-free at all times. The levers
are released, two non-return valves
positively shut both ends, enabling
the separation to occur. In
contrast to most existing products,
the SZ Series breakaways work
independently from the working
pressure and allow for a protective
approach without the need to wait
for an impact. With a proven track
record of more than 25 years, the
SZ Series Breakaway has earned
an outstanding reputation of
reliability in the industry.
SZ Series Breakaway Coupling
Installation Example
When the line system is subjected to an
unprecedented load, the levers swing out
by the cable. The slide ring is displaced
and the segments are released. Then the
two body halves separate and the two
spring-loaded valves immediately shut
both hose ends.
Handle
—3
Shown with optional proximity switch
Benefits
e Protection of loading-arm components
e Protection of loading facility
e Spill prevention
* Reconnectable
Materials: Stainless Steel (316)
Others available upon request
Seals: EPDM, Fluorocarbon, Chemraz®
Pressure Ratings: 150 to 360 psi.
Available in 1", 2", 3", 4" and 6" (other sizes up to 12"
available upon request)
NTS Emergency Separation Device
Triggered by cable (self-disconnected)
SZ Loading Arm Marine
Installation Example
Note: The length of the
SZ cable must be shorter
than the maximum
movement of the loading
arm hose in order to
NTS Emergency Separation Device h B
trigger the separation.
NTS-SZ Separation by hand
Barge
IMPORTANT: OPW products should be used in compliance with applicable federal, state, provincial, and local laws and regulations. Product selection should be based on physical specifications and limitations and compatibility with the environment and
materials to be handled. OPW MAKES NO WARRANTY OF FITNESS FOR A PARTICULAR USE. All illustrations and specifications in this literature are based on the latest product information available at the time of publication. OPW reserves the right to make
changes at any time in prices, materials, specifications and models and to discontinue models without notice or obligation.
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