|
|
| 1. |
Code
|
Valve
Type
|
|
T
|
Three
Piece
Ball Valve
|
|
2.
|
Code
|
Valve
Size
|
|
Reg
Port Model 4150
|
|
Q
|
1/4in.
|
|
A
|
3/8
in.
|
|
5
|
1/2in.
|
|
7
|
3/4in.
|
|
1
|
1
in.
|
|
B
|
I-1/4
in.
|
|
C
|
1-1/2
in.
|
|
2
|
2
in.
|
|
D
|
2-1/2
in.
|
|
3
|
3
in.
|
|
Full
Port Model 4151
|
|
F
|
1/2
in.
|
|
G
|
3/4
in.
|
|
H
|
1
in.
|
|
J
|
I-1/4
in.
|
|
K
|
1-1/2
in.
|
|
L
|
2
in.
|
| 3. |
Code
|
Pressure
Rating |
| 1 |
1500
psi WOG |
|
| 4. |
Code |
End
Connection
|
|
1
|
BW.
SCH.IO
|
|
6
|
BW.
SCH.160
|
|
8
|
BW.
SCH. 80
|
|
B
|
8W.
SCH. 40
|
|
C
|
Center
section only
|
|
D
|
SE
& socketweld
|
|
F
|
BW.
SCH. 5
|
|
S
|
Screwed
ends
|
|
X
|
Socketweld
|
| 5. |
Code
|
Body
& Trim Material
|
| A
|
Alloy
20 |
| B
|
Hastelloy
B |
| C
|
Hastelloy
C |
| D
|
416
|
| F
|
CD4MCU
|
| I
|
Inconel
600 |
| M
|
Monel
|
| N
|
Nickel
|
| R
|
Avesta
254 SMO |
| T
|
Titanium
|
| Z
|
Zirconium |
| 6. |
Code |
Packing
Material
|
| C
|
Cooperfill
|
| G
|
Grafoil
|
| R
|
RTFE
|
| T
|
PTFE |
| U
|
UHMWP |
|
| 7. |
Code |
Gasket
Material
|
| C
|
Cooperfill
|
| G
|
Grafoil
|
| R
|
RTFE
|
| T
|
PTFE |
| U
|
UHMWP |
| 8. |
Code
|
Seat
Material
|
| C
|
Cooperfill
|
| D
|
Delrin
|
| E
|
Vespel
|
| K
|
Kel-F
|
| L
|
Arlon
1000 |
| N
|
Nylon
|
| P
|
PFA
|
| Q
|
RTFE
cavity filler |
| R
|
RTFE
|
| T
|
PTFE
|
| U
|
UHMWP
|
| V
|
UHMWP
cavity filler |
| 9. |
Code |
Handle
Option
|
|
AA
|
Std.
Valve w/Handle
|
|
AB
|
Std.
Valve w/o Handle
|
|
Ball
Valve Seat Materials
Cooper
ball valves are available with a wide choice of seat
materials from Teflon to metal seats. Soft seated valves
such as Teflon or other polymerics provide a tight positive
shutoff. Cooper polymeric seated ball valves are factory
tested per API 598 for bubble tight shutoff. Metal seated
ball valves, while not providing a positive shutoff
will provide closure with very low leakage rates.
TFE
(Teflon)*
A
tough and fairly rigid tetrafluoroethylene polymer,
TFE has excellent temperature chemical and anti-friction
properties. Being completely inert to chemical attack
TFE is especially suited for ball valve seats and stem
packings in a wide range of flow media and temperatures
(-90 to +450°F). It is only affected by such substances
as liquid alkali metals, fluorine and radiation. TFE's
slick, wax-like surface displays one of the lowest coefficients
of friction of any non-solid material and easily the
lowest static friction. Under high stress TFE is susceptible
to cold-flow, and it should be avoided for seal or gasket
applications where sealing is dependent on the resiliency
and memory of the material, unless it is totally encapsulated.
Reinforced
TFE
The
already highly satisfactory physical performance of
TFE can be improved by the addition of "fillers" or
reinforcing agents. The effect of these materials is
to modify the properties such that a higher resistance
to cold-flow is obtained without appreciable degradation
of the coefficient of friction. Thus, reinforced TFE
has a larger application range dependent upon the reinforcing
agent. The most commonly used "filler" is 15% by weight
of controlled length fibrous glass. Since this glass
itself is virtually chemically inert, the application
range of this filled material is very wide. The percentage
of glass reinforcement can vary from 2% to 25% by weight,
depending upon application requirements. Much empirical
data is being derived for many reinforcing agents as
alternatives to glass. Examples are graphites and high
temperature plastics.
CTFE
(Kel-F)**
A
polymer of trifluorochloroethylene, it is colorless,
nonflammable, and exceptionally stable and chemically
inert. It possesses high impact strength at both high
and low temperatures, resistance to thermal shock, and
zero moisture absorption, but is "notch sensitive."
Its high compressive strength is indicative of its unusually
low cold-flow characteristics. An excellent bearing
material, it is well suited for ball valve seats, but
is not recommended for O-ring seals. In specially designed
ball valves, amorphous CTFE has been used for ball seats
with success, for cryogenic services down to -350°
F.
PFA
Teflon
PFA is a class of perfluoropolymers that offers the
processing ease of conventional thermoplastics with
added features that substantially extend its temperature
limits. It is a copolymer that combines the carbon-
fluorine backbone of fluorocarbons with a perfluoroalkoxy
side chain. These perfluoroalkoxy branches lead to the
general symbol, PFA. PFA, a true thermoplastic, is melt
processible, and can be molded to extremely difficult
shapes. It is processed at 700°F. PFA resin has
a branched polymer chain that provides good mechanical
properties at low melt viscosities. The unique branch
of PFA is longer and more flexible, leading to improvements
in high temperature properties, higher melting point
and greater thermal stability. The strength and stiffness
of PFA at high operating temperatures are at least equivalent
to those of PTFE and creep resistance is better than
PTFE over a wide temperature range. PFA flex life is
excellent. PFA possesses features that make it extremely
desirable as a liner for corrosive fluid flow applications;
it is chemically inert; it is heat, weather, and stress
cracking resistant; it has negligible moisture absorption;
it has anti-stick characteristics; it has a low coefficient
of friction. PFA has been found to be superior for handling
certain chemicals- monomers such as butadiene. PFA permits
the use of some lined products on a wider range of applications
to temperatures as high as 500°F under certain conditions.
Ultra
High Molecular Weight Polyethylene (UHMWP)
This
thermoplastic polymer has a molecular weight of approximately
four million, resulting in an exceptionally high notched
impact strength, resistance to stress cracking, and
outstanding resistance to abrasion. Additionally, the
material offers excellent resistance to most chemicals
and has superior self-lubricating properties. It is
not recommended for strong acids and organic solvents.
Although temperature is limited, depending upon application,
between 75° and 160°F, the material is well
suited to ball valve seats, especially in pressure ranges
greater than those that can be handled by TFE. It is
normally used in low to medium level radiation service,
and in applications where fluorocarbons cannot be tolerated.
PFA (Perfluorolkoxy) PFA is a true thermoplastic, molded
TFE, which is melt processible, and can be processed
into extremely difficult shapes. II exhibits slightly
higher thermal operating temperatures than PTFE, less
creep resistance, and has an excellent flex life. II
is chemically inert, and is heat, weather and stress
cracking resistant. It has negligible moisture absorption,
and a low coefficient of friction.
Vespel
(SP-21)
Vespel
is a tough, highly heat resistant polymide resin which
has a larger operating range than most other plastics.
Vespel does not soften or melt when exposed to high
temperatures. Reduction of mechanical properties does
occur, but after prolonged exposure and generally in
a predictable manner. It's characteristics can also
be enhanced by the addition of certain percentages of
fillers such as graphite, molybdenum disulfide, fiberglass,
etc. II has a continuous temperature rating of 550°
to 600°F and may be used at temperatures down to
-250°F. It should not be used for water, steam,
or aqueous solutions above 212°F, caustic, or strong
acids. II works well in organic solvents, petroleum
oils, mineral oils, and Dowtherm; and exhibits unusual
resistance to radiation.
Delrin
Delrin
can be used in applications involving organic solvents,
inorganic salt solutions, and detergents, where temperatures
are between -250° to 150°F. It should not be
used for acids, strong alkalis, oxidizing agents, 02
or hydraulic service.
Peek
(Polyetheretherketone)
High
temperature aromatic polymer.
Grafoil***
Recently,
increasing numbers of applications have been solved
by the use of this laminar graphite material which is
formed into seats or packing. The material's exceptionally
low coefficient of friction and astonishing resistance
to elevated temperatures (6000°F max.), combined
with its compressive strength of 24,000 PSIG, permits
its use as a ball valve seat and seal material in extreme
conditions where low wear is anticipated. The performance
of grafoil as a stem packing is unsurpassed. Additionally,
it has remarkable resistance to radiation.
*
Registered Trade Mark of E.I. Dupont Co.
** Registered Trade Mark of 3M Co.
*** Registered Trade Mark of Union Carbide Corporation
