Flowserve Nordstrom Hypregun-Plus 5G Pneumatic Valve Sealant Injector - Manual (Page 3)

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Nordstrom Valves Hypregun - Plus 5G FCD NVENIM2004-00-AQ 10/14
flowserve.com
Flowserve Nordstrom Valves offers more than 25 varieties of
sealants for plug, ball, and gate valves. Stick and bulk grades
are available in most formulas.
Nordstrom Valves Sealants
At Flowserve our primary goal is to serve lubricated valve users with
the highest quality sealant and sealant injection equipment.
We offer:
• A broad variety of valve sealants
• A flexible, service-oriented manufacturing facility providing
outstanding quality control
• An experienced, dedicated staff ready to serve your needs
Our success comes from customer service. Competent, experienced
personnel handle your orders from development, to reorder entry, to
manufacturing, to shipping.
We supply the most advanced formulations. Our high-quality sealants
range from -85°F to 700°F (-65°C to 371.1°C), and from air and water
applications to the most aggressive line fluids.
Consult your Flowserve Nordstrom Valves Authorized Distributor for
information on valve sealants.
Functions of Valve Sealants
1. Drop-Tight Seal – To secure an absolutely tight seal, the film of
the sealant works to form a seal between the sealing surfaces
of the valve. The seal is formed by sealant transmitted through
a system of passageways around the valve port. With proper
selection of sealant for your particular service, the seal can be
retained over a wide range of temperatures and pressures.
2. Lubrication – Prevents metal-to-metal contact of the valve sealing
surfaces by providing a film over bearing irregularities. No matter
how finely ground a metal surface may be, the metal is a series
of tiny peaks and valleys. As one metal surface slides against
another, friction is set up and adhesion, shearing, or plowing may
result. A protective film of sealant over the bearing area prevents
metal-to-metal rubbing.
3. Renewable Seat – There is no need to disassemble a lubricated
valve or remove it from service to replace mildly damaged seats.
Sealant, as a structural part of lubricated valves, provides a
flexible and renewable seat, eliminating the necessity of force
fit contact to effect a seal. For this purpose, the sealant not only
must have proper plasticity, but also resistance to line fluids such
as solvents and chemicals. Sealant forms a seal between the
sealing surfaces of the valve, even under pressure.
4. Plug Jacking – The fundamental operating principle of the
traditional lubricated plug valve design lies in the application of
Pascal’s Law. The law states that a unit pressure applied to the
liquid contained in a sealed vessel is transmitted to every part
of the liquid with undiminished force, thus multiplying the force
many times, depending on the area of the interior of the vessel.
The sealant, under pressure developed by sealant injection,
supplies the hydraulic means for lifting the plug from its tapered
seat when and if that force is needed to free the plug.