Size Range: 15 - 600mm
Body Material: S G Iron
Plug Material: SG Iron
End Connections: Screwed, Flanged
Pressure Rating: 125LB/150LB
In Nordstrom Bolted Gland type
valves, controlled plug motion is provided by flexing
of the gland itself. The bolted type gland valves can
be adjusted, if needed, but normally require little
attention for leak-free, easy turning valve performance.
The tapered plug is lapped individually
with its matching body, providing perfect seating contact.
The sealant channels in the plug and body seats provide
lubrication which, together with the positive rotary
action of the tapered plug valve, protects the seating
surfaces against corrosion, erosion, or accumulation
of solid deposits.
This valve is designed with a heavy
wall body which is constructed beyond its requirements
as a pressure vessel for its maximum rated working pressure
to withstand the higher-than-line sealant pressure and
expected line stresses.
Size Range: 15 - 600mm
Body Material: S G Iron
Plug Material: SG Iron
End Connections: Screwed, Flanged
Pressure Rating: 125LB/150LB
The Nordstrom Dynamic Balance Iron
Valve incorporates proven features and user benefits
from the Dynamic Balance Steel Valve, developed in the
mid-1970's, plus over sixty years of experience in endless
valve applications and design technology. A pressure-balanced
plug assures predictable torque even under high-pressure
differential, and vibration and thermal cycling. The
Dynamic Balance Iron Plug Valves are available in sizes
from 4 to 20 with CWP ratings of 150 and 200.
Turns easily every time, shuts off
with proven dependability of a plug valve and eliminates
the problems generally associated with conventional
plug valves. Balance holes at the top and bottom of
the plug maintain equal pressure above and below the
plug and in the plug port so that line pressure cannot
jam the plug into the body taper. A stainless steel
spring pre-loads the plug to prevent vibration and thermal
cycling from wedging the plug into the taper. Loading
the top of the plug in this way also compensates for
the weight of the plug when the valve is installed upside
down. The Dynamic Balance Iron Plug Valve provides durable,
metal-to-metal seats and a sealant system for bubble-tight
shut-off and in-line restoration of damaged seats. Dynamic
Balance Iron Plug Valves are suited for general gas,
water and wastewater services at temperatures from -20
deg. F to 350 deg. F (-29 deg. C to 177 deg. C). Sealant
systems are incorporated into metal-seated plug valves
as an integral part of the valve, and sealant is required
to insure proper valve performance.
